Maxim Integrated MAX98050 User manual

Evaluates: MAX98050
MAX98050 Evaluation System
General Description
The MAX98050 evaluation system (MAX98050EVSYS#)
evaluates the MAX98050, a low-power, high-performance
audio CODEC with integrated low-latency digital lters
for wireless hearables, headsets, and headphones. The
EV system is comprised of two MAX98050 Development
Boards (DEV boards), Maxim’s Audio Interface Board III
(AUDINT3), Maxim’s Dual EVKit Adapter board, and a
USB cable. In addition to the hardware, the MAX98050
Evaluation Software and Hearable Sound Studio Basic
software are available for download.
It is recommended that the DEV boards be evaluated with
the AUDINT3 board as an EV system. The EV system can
be congured as Mono Hardware Setup (1 DEV board)
or Stereo Hardware Setup (2 DEV boards). MAX98050
supports standard I2S, left-justied, and TDM digital audio
interfaces, as well as I2C for control.
The AUDINT3 board provides all of the necessary supply
voltages for proper operation of MAX98050. In addition,
the AUDINT3 provides the USB-to-PCM and USB-to-I2C
interfaces that are needed to evaluate the system. The
Simplied EV System Block Diagrams show details of the
DEV boards, Dual EVKit Adapter board and connection
with the AUDINT3 board.
For GUIs, there is the MAX98050 Evaluation Software,
which provides complete access to all hardware registers.
There is also the Hearable Sound Studio Basic software,
which facilitates the tuning of the onboard 5 band play-
back equalizer, digital lter channels, and the digital lter
dynamic range compression (DRC).
Benets and Features
●Complete Hardware System with Easy Setup, No
Tools or Special Equipment Required
●Easy-to-Use Graphical User Interfaces Software
(Windows® 10 Compatible)
• MAX98050 Evaluation Software Provides Complete
Access to All Hardware Registers
• Hearable Sound Studio Basic for Digital Filter
Design and Acoustic Hardware Evaluation
EV System Contents
●Two MAX98050 Development Boards (DEV Boards)
●Audio Interface Board III (AUDINT3)
●Dual EVKit Adapter Board
●Micro-USB cable
319-100629; Rev 0; 11/20
Ordering Information appears at end of data sheet.
Windows is a registered trademark and registered service mark
of Microsoft Corporation.
Simplied EV System Block Diagram for MAX98050: Mono Hardware Setup
MAX98050 DEVELOPMENT BOARD
HEADPHONE
OUTP UT
U1
MAX98050
AMIC1 /
AMIC1+AMIC2
OUTN
OUTP
AMI C2
AMI C3
TIP
RI NG 1
RI NG 2
SLEEVE
TIP
RI NG 1
RI NG 2
SLEEVE
TIP
RI NG 1
RI NG 2
SLEEVE
AVDD2
DVDD
AVDD1
SCL
DOUT
SDA
DIN
BCLK
LRCLK
N/C
DVDDIO
PGND
AVDD2
MBVDD
MBVDD
AVDD1
DVDD DVDDIO AVDD2 / AVDD3
ENABLE
HW_EN
DISABLE
0x62
0x64
0x660x68
MBVDD AVDD1 3.3V
DMI C1 DMIC2 DMI C3
J2
J13
I2C ADDRESS
JMP1
JU1
JU2
J14
J6
J7
J8
J9
J10
J11
J12
SCL
DOUT
LRCLK
IRQ
SDA
DIN
BCLK
J2
AUDIO INTERFACE BOARD 3
USB
INTERFACE
D1
S2 S1S3
J1
J1
Click here to ask about the production status of specic part numbers.

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MAX98050 Evaluation System
Simplied EV System Block Diagram for MAX98050: Stereo Hardware Setup
MAX98050 DEVELOPMENT BOARD
HEADPHONE
OU TP UT
U1
MAX98050
AMIC1 /
AMIC1+AMIC2
OUTN
OUTP
AMIC2
AMIC3
TIP
R ING 1
R ING 2
SLEEVE
TIP
R ING 1
R ING 2
SLEEVE
TIP
R ING 1
R ING 2
SLEEVE
AVDD2
DVDD
AVDD1
SCL
DOUT
SDA
DIN
BCLK
LRCLK
N/C
DVDDIO
PGND
AVDD2
MBVDD
MBVDD
AVDD1
DVDD DVDDIO AVDD2 / AVDD3
ENABLE
HW_EN
DISABLE
0x62
0x64
0x660x68
MBVDD AVDD1 3.3V
DMIC1 D MI C2 DMI C3
J2
J13
I2C ADDRESS
JMP1
JU1
JU2
J14
J6
J7
J8
J9
J10
J11
J12
SCL
DOUT
LRCLK
IRQ
SDA
DIN
BCLK
MAX98050 DEVELOPMENT BOARD
HEADPHONE
OU TP UT
U1
MAX98050
AMIC1 /
AMIC1+AMIC2
OUTN
OUTP
AMIC2
AMIC3
TIP
R ING 1
R ING 2
SLEEVE
TIP
R ING 1
R ING 2
SLEEVE
TIP
R ING 1
R ING 2
SLEEVE
AVDD2
DVDD
AVDD1
SCL
DOUT
SDA
DIN
BCLK
LRCLK
N/C
DVDDIO
PGND
AVDD2
MBVDD
MBVDD
AVDD1
DVDD DVDDIO AVDD2 / AVDD3
ENABLE
HW_EN
DISABLE
0x62
0x64
0x660x68
MBVDD AVDD1 3.3V
DMIC1 D MI C2 DMI C3
J2
J13
I2C ADDRESS
JMP1
JU1
JU2
J14
J6
J7
J8
J9
J10
J11
J12
SCL
DOUT
LRCLK
IRQ
SDA
DIN
BCLK
J2
AUDIO INTERFACE BOARD 3
USB
INTERFACE
D1
S2 S1S3
J2 J1
J3 J1
DUAL EVKIT
ADAPTER
J1 J1

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MAX98050 Evaluation System
Software Installation
1) For the latest software, login to your MyMaxim ac-
count at maximintegrated.com and navigate to
MAX98050 > Design Resources > Software. For the
MAX98050, there are two GUIs available: MAX98050
Evaluation Software and Hearable Sound Studio Ba-
sic. Download each, and extract each compressed
folder by rst selecting the folder, click and hold (or
right-click) the folder, select Extract All, and then fol-
low the instructions.
2) Install the MAX98050 Evaluation Software by running
the program installer. Follow the installer prompts to
completion. Windows might display a message in-
dicating that this software is from an unknown pub-
lisher. This is not an error condition and it is safe to
proceed with the installation.
3) Install the Hearable Sound Studio Basic software
on your computer by running the program installer.
Follow the installer prompts to completion. Windows
might display a message indicating that this software
is from an unknown publisher. This is not an error
condition and it is safe to proceed with the installation.
Quick Start Guide
For the MAX98050EVSYS#, there are two GUIs available:
MAX98050 Evaluation Software and Hearable Sound
Studio Basic. For this Quick Start, only the MAX98050
Evaluation Software will be used.
Required Equipment
●MAX98050EVSYS#
• Two MAX98050 Development Boards (only one
needed for this Quick Start)
• Audio Interface Board III (AUDINT3)
• Dual EVKit Adapter Board
• Micro-USB cable
● Windows 10 PC with USB port and USB audio source
(e.g., Windows Media Player®or Apple Music®)
Required Software
●MAX98050 Evaluation Software application. If not
already installed, see the Software Installation section.
Note: In the following sections, software-related items are
identified by bolding. Text in bold refers to items directly
from the evaluation software. Text in bold and under-
lined refers to items from the Windows operating system.
Reference Material
●MAX98050 IC data sheet
Procedure
Follow the steps below to set up the EV system for the
device evaluation.
1) Connect the AUDINT3 Board to either one of the
MAX98050 Development Boards using the J1
connector.
2) Verify jumper settings: JU1 Hardware Enable jumper
is set to ENABLE, JMP1 ADDR is set to 0x64, JU2
MBVDD is set to 3.3V.
3) Connect the USB cable from your computer to the
USB port (J2) on the AUDINT3 board. The AUDINT3
board provides all necessary power to the MAX98050
Development Board through the J1 connector.
4) When properly set up, there should be a slow puls-
ing magenta on the AUDINT3’s LED (D1). When rst
plugged in, the LED D1 initially blinks white. Once the
computer registers the AUDINT3 as a USB device,
D1 changes to magenta and blinks slowly.
Test
1) Launch the MAX98050 Evaluation Software and wait
while the software connects to the EV system.
2) Once the connection is established, the status
bar at the bottom of the GUI window should report
Audio Interface 3 with its rmware version, and dis-
play MAX98050 and its revision ID.After the EV system
is fully connected, congure the device by loading a
pre-installed conguration le.This le can be loaded
from File, Load Register Settings, Pre-Installed
Conguration Files. Scroll down to select the
desired conguration le for USB playback to
headphone output. Wait for the writes to complete
before operating the device. Progress of the regis-
ter writes can be seen in the Status Bar as a green
progress bar.
3) Apply a headphone load to the OUTP and OUTN of
J14, or OUTP and OUTN wire loops, or via the 3.5mm
connector J9, see pinout in MAX98050 EV Kit Sche-
matic Diagrams.
Windows Media Player is a registered trademark and registered service mark of Microsoft Corporation.
Apple Music is a registered trademark of Apple, Inc.

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MAX98050 Evaluation System
4) Access the Windows Sound settings by Settings >
System > Sound. Select the output device to be Maxim
AUDINT003, it should appear as Speakers (3-Maxim
AUDINT003 ADC1.0) or similar, see Figure 2. On the
same page, click on Sound Control Panel > Play-
back tab and ensure that the Default Device is set
to Speakers (3-Maxim AUDINT003 ADC1.0) or some-
thing similar, as shown in Figure 3.
5) Adjust the audio source volume to a low level.
6) Enable the audio source and verify that audio is heard
through the connected headphones. Adjust the audio
source volume as needed.
7) Quickstart is now complete.
Hardware Options: Mono, Stereo
There are two options for Hardware Setup: Mono or
Stereo.
Mono Hardware Setup is typically used for electrical
bench evaluation and characterization, and requires the
MAX98050 Evaluation Software for register access and
control of the MAX98050.
Stereo Hardware Setup is intended for acoustic evalua-
tion and testing using a stereo headset or similar acoustic
form-factors. For stereo acoustic evaluation and design,
Hearable Sound Studio Basic software is required.
Hearable Sound Studio Basic is also used to design
the digital lters for the MAX98050. The MAX98050
Evaluation Software is also used with Hearable Sound
Studio Basic in Stereo Hardware setup mode.
Mono Hardware Setup
(for electrical bench evaluation)
1) Connect the AUDINT3 Board to either one of the
MAX98050 Development Boards using the J1
connector.
2) Verify jumper settings: JU1 Hardware Enable jumper
is set to ENABLE, JMP1 ADDR is set to 0x64, JU2
MBVDD is set to 3.3V.
3) Connect the USB cable from your computer to the
USB port (J2) on the AUDINT3 board. The AUDINT3
board provides all necessary power to the MAX98050
Development Board through the J1 connector.
4) When properly set up, there should be a slow puls-
ing magenta on the AUDINT3’s LED (D1). When rst
plugged in, the LED D1 initially blinks white. Once the
computer registers the AUDINT3 as a USB device,
D1 changes to magenta and blinks slowly.
Stereo Hardware Setup
(for acoustic testing and headset evaluation)
1) Connect the Dual EVKit Adapter board (J1 connector)
to the AUDINT3 board (J1 connector).
2) Connect one of the MAX98050 Development boards
(J1 connector) to the the Dual EVKit Adapter board
(J2 connector).
3) Connect the other MAX98050 Development boards
(J1 connector) to the the Dual EVKit Adapter board
(J3 connector).
4) Verify jumper settings for each DEV Board: JU1 Hard-
ware Enable jumper is set to ENABLE, JU2 MBVDD
is set to 3.3V.
5) Verify that one of the DEV boards I2C device ad-
dress is set to 0x62 using the jumper setting for JMP1
on that board. Verify that the other DEV boards I2C
device address is set to 0x64 using the jumper setting
for JMP1 on the other board, see Simplied EV Sys-
tem Block Diagram for MAX98050: Stereo Hardware
Setup for MAX98050 for location of JMP1.
6) Apply a headphone load to the OUTP and OUTN
connectors J14, or OUTP and OUTN wire loops, or
via the 3.5mm connector J9, see pinout in MAX98050
EV Kit Schematic Diagrams.
7) Connect the USB cable from your computer to the
USB port (J2) on the AUDINT3 board. The AUDINT3
board provides all necessary power to both the
MAX98050 Development Boards through the J1 con-
nector.
8) When properly set up, there should be a slow puls-
ing magenta on the AUDINT3’s LED (D1). When rst
plugged in, the LED D1 initially blinks white. Once the
computer registers the AUDINT3 as a USB device,
D1 changes to magenta and blinks slowly.

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MAX98050 Evaluation System
Software for MAX98050
For the MAX98050EVSYS#, there are two GUIs avail-
able: MAX98050 Evaluation Software and Hearable
Sound Studio Basic.
The MAX98050 Evaluation Software GUI gives direct
access to all of the control registers inside the MAX98050,
and is recommended for all electrical bench testing
of the IC. Mono Hardware Setup is recommended for
electrical bench testing of the MAX98050. The main
interface of the MAX98050 Evaluation Software is an
interactive functional block diagram of the MAX98050.
For more information, see the Detailed Description of
MAX98050 Evaluation Software section.
Hearable Sound Studio Basic GUI is an acoustic design
tool, and is for use in design of the digital lters in the
MAX98050 (Digital Filter 1, Digital Filter 2, Playback
Compensation Filter, Digital Filter DRC, EQ). Hearable
Sound Studio Basic GUI is also used to evaluate lter
designs with hardware, using the MAX98050EVSYS#
connected to acoustic form-factors such as headsets etc.
Hearable Sound Studio Basic GUI
The intended purpose of the Hearable Sound Studio
Basic GUI is to aid in the design of digital lters for the
MAX98050, and help with the evaluation of those digital
lter designs using the MAX98050EVSYS#. For digital
lter design, hardware is not required with Hearable
Sound Studio Basic. For acoustic hardware evaluation,
however, the MAX98050EVSYS# is required (in Stereo
Hardware Setup mode). The Hardware Evaluation sec-
tion of Hearable Sound Studio Basic shows how to
properly set up the MAX98050EVSYS# in stereo mode.
For acoustic hardware evaluation, a headset or similar
acoustic form-factor can be connected to each of the DEV
Boards. Each DEV Board can support multiple transduc-
ers - up to three microphones (ECM, MEMS, Analog,
Digital, etc) and one dynamic headphone speaker. Refer
to the Detailed Description of Hardware section in this
datasheet, as well as the MAX98050 IC Datasheet for
information on how to properly congure and connect the
DEV Boards for the desired transducers.
Hearable Sound Studio Basic is also designed
to be used in conjunction with the MAX98050
Evaluation Software (see the Detailed Description of
MAX98050 Evaluation Software. During acoustic hard-
ware evaluation, MAX98050 Evaluation Software is used
to adjust the required lter path gain settings, set
desired audio channels, switch lter banks, enable/dis-
able the ICs etc. MAX98050 Evaluation Software can
also used to enable the Group Write Address feature in
the MAX98050, where commands can be written to both
DEV Boards simultaneously.
To launch the Hearable Sound Studio Basic application,
navigate to Windows > Maxim Integrated and click on
the Hearable Sound Studio Basic application icon.
Detailed Description of
MAX98050 Evaluation Software
The MAX98050 Evaluation Software is designed to be
used only with the MAX98050 EV system. The software
provides an intuitive GUI for programming the device and
includes many features intended to aid in evaluation.
The MAX98050 Evaluation Software main window
( Figure 1 ) is composed of four main sections: menu bar,
communication toolbar, device registers control tabbed
pages, and a status bar. The menu bar provides additional
features to aid evaluation, the toolbar provides basic func-
tionality for communicating with the device, and the status
bar provides information about hardware connectivity and
communication status. The tabbed pages make up the
bulk of the GUI and provide the controls for programming
the device’s hardware registers.
The Block Diagram tab provides access to all the device
registers using dialog windows, which contain GUI con-
trols for conguring the device. The dialog windows are
opened by clicking on the blocks in the block diagram.
The Control Registers tab provides direct access to the
valid registers from 0x2000–0x20FF, as well as to the
revision ID register, 0x28FF. The Filter Registers tab
provides access to the registers for the 5-band equalizer,
the dynamic range compression, and the digital lters.
The Log tab provides a log of the I2C transactions and a
tool to read specic registers.
The MAX98050 Evaluation Software is compatible with
Windows 10 and can be found on Maxim’s website. Refer
to the MAX98050 data sheet for device register information.

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MAX98050 Evaluation System
Figure 1. MAX98050 Evaluation Software
Figure 2. Windows Sound Settings
Figure 3. Playback Device
COMMUNICATION
TOOL BAR
STATUS BAR
INTERRUPT
STATUS
PANEL
MENU BAR
DEVICE REGISTERS
CONTROL TABS
Figure 1

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MAX98050 Evaluation System
Connect Sequence
When the evaluation software starts for the rst time,
the program automatically connects to the EV system
and attempts to connect to the USB control interface on
the AUDINT3 board rst. Once that connection is estab-
lished, it searches for all I2C addresses associated with
the MAX98050 device and populates all detected device
addresses in the Active Device drop-down list. During
this sequence, the text on the Connect button auto-
matically changes from Connect to Disconnect, and the
status bar is also updated to reect the current state of the
hardware connection.
Once the EV system is fully connected, the button dis-
plays Disconnect, and when clicked, it disconnects the
software from the hardware. The software can also be
disconnected from the hardware by selecting Device |
Disconnect from the menu bar.
There are two methods to re-establish a connection with
the hardware. The rst is by selecting Device | Connect
from the menu bar. This instructs the program to con-
nect to the EV system. The second method is to click the
Connect button until it displays Disconnect, which signi-
es that the EV system is fully connected.
Communication Tool Bar
The toolbar consists of six buttons and a drop-down combo
box. These controls are always accessible, regardless of
the active tabbed page. The toolbar is shown in Figure 4,
and Table 1 provides details about each control.
Status Bar
The Status bar is divided into four sections. From left to
right: status and alert messages, device part number and
revision ID, interface name and rmware version, and
evaluation system connection status.
Interrupt Status Panel
The Interrupt Status panel (not to be confused with the
Status bar) displays the state of the Raw, State, and
Flag interrupts. This data is read from the Raw_, State_,
and Flag_ interrupt registers (0x2001–0x200A). When the
image is red, it indicates that the associated interrupt bit
has been set.
The panel also includes checkboxes for each interrupt
that is used to enable the link between an interrupt’s Flag
bit and State bit. When enabled, the Flag bit is set when-
ever the State bit is set. To clear the State and Flag bits,
click on the interrupt’s associated Clear button.
Notes:
●Each interrupt source must be enabled for the FLAG
column (i.e., flag bits) to be set.
●The IRQ_EN bit needs to be set for the interrupt to be
output on the IRQ pin.
Table 1. Communication Tool Bar Controls
Figure 4. Communication Tool Bar
CONTROL FUNCTION
On Press to set the Global Enable bit (EN). This enables the device.
O󰀨 Press to clear the Global Enable bit (EN). This disables the device. Note: The software can
communicate with a disabled device, as long as its I2C interface remains active.
Active Device Provides a list of detected I2C addresses. The displayed address is the active device.
Connect/Disconnect See the Connect Sequence section for additional details.
• Connect Press to connect to the USB control interface. Detected addresses are shown in the Active Device
drop-down list.
• Disconnect Press to disconnect from the USB control interface.
Read All Press to initiate a read of all device registers on the active device. The Control Registers and Block
Diagram tabs are updated to reect the read data.
Write All Press to initiate a write to all device registers on the active device, using the settings shown on the
Control Registers tab.
Reset Press to reset device registers to their power-on-reset (POR) state on the active device.

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MAX98050 Evaluation System
Block Diagram Tab
The evaluation software uses an interactive block dia-
gram to facilitate the programming of the device. The
block diagram also provides a visual representation of the
device’s functions and current conguration.
There are three types of blocks in the block diagram,
and they are identied by the cursor image. The cursor
changes to a pointing hand when over a block that opens
a dialog window and a full hand to toggle a function. If
the cursor does not change when over a block, then it
is an inactive block and is only provided for illustrational
purposes.
The color of a diagram block changes depending on the
enabled state of the device function(s) associated with
that block. An inactive block is grey, a disabled block is
white, and an enabled block is teal. Figure 5 shows the
block diagram with the device congured for digital audio
interface (DAI) (USB audio) input and headphone output.
Dialog Windows
Dialog windows are associated with specic blocks in the
block diagram and contain the controls for conguring the
registers associated with that functional block. Open a dia-
log window by clicking on a dialog block. Figure 7 shows
the typical GUI controls that are found on a dialog window.
Figure 5. MAX98050 Block Diagram (USB Audio Input to Headphone Output)
Figure 6. Control Register Tab

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MAX98050 Evaluation System
Control Registers Tab
The Control Registers tab provides two methods for con-
guring the device. As an example, Figure 6 shows the
elements of the interrupt registers.
The rst conguration method involves clicking on the
register’s bit labels. A non-bold bit label indicates that the
bit is currently set low. A bold bit label indicates that the bit
is currently set high. Clicking on a bit toggles its state and
results in a write to that register. This action also updates
the value displayed in the register’s edit box, located to
the right of the bit labels.
The second conguration method involves entering a
hex value in the register’s edit box and then pressing
the Enter key; the software automatically congures the
device register once the Enter key is pressed. The state
of the bit labels are then updated to reect the value
shown in the edit box.
Note: Trying to write to a read-only bit by clicking/toggling
its label or entering a hex value in its edit box updates the
GUI, but it does not a󰀨ect the bit’s value in the device. All
read-only bits are updated to reect their current value in
the device by performing a read all operation.
All changes made on this tab are reected on the Block
Diagram Tab and on any open dialog windows.
Menu Bar
Table 2 describes all menu bar items with additional infor-
mation for some menu items provided in the following
sections.
File I/O
The software’s save and load features are accessed from
the File menu. The Save Control Register Settings
feature saves the data currently displayed on the Control
Registers Tab.
A conguration le’s main purpose is to capture the
current state of the device’s registers, as displayed on
the register tab. This feature makes it easy to program a
device to a saved/known state and allows for the sharing
of conguration les between users. To facilitate usage,
use descriptive le names when saving a conguration le.
The save and load features are functional even when the
hardware is not connected. This allows conguration les
to be created and opened when hardware is not available.
Since the conguration le is automatically generated by
the software, it is not meant to be manually formatted,
and doing so can cause le loading issues. To open a
conguration le for viewing purposes only, use a plain
text editor.
Select File > Save Control Register Settings to create
a conguration le. The register address and its data are
saved as tab-delimited values and the le is saved with a
*.98050 extension.
The software has some standard conguration les pre-
installed. A le can be loaded by selecting File > Load
Register Settings > Pre-Installed Conguration Files,
and using the drop-down menu, selecting the le, then
clicking Load.
Figure 7. Typical GUI Controls

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MAX98050 Evaluation System
Table 2. Menu Bar Items
MENU ITEM DESCRIPTION
FILE
Load Register Settings Loads a conguration le (as saved by the Save Control Register Settings option or a factory
preinstalled le).
Save Control Register
Settings Saves a conguration le containing the current device settings.
Exit Closes the MAX98050 evaluation software.
DEVICE
Connect Runs a connection routine to connect to the evaluation system. First, establish a connection
to the AUDINT3 board, and then establish a connection to the MAX98050.
Disconnect Disconnects the PC from the EV system.
Reset Resets all control registers to their power-on-reset (POR) states.
Read All Performs a read from all registers and updates the GUI.
Write All Performs a write to all writeable registers, using the values shown on the Control Registers Tab,
and then updates the GUI.
Read Rev ID Reads the device’s revision ID register and updates the status bar.
OPTIONS
Audio Interface 3
(Advanced Users)
F3
Opens an advanced user interface dialog window for the AUDINT3, allowing the user to control the
digital clocks and applied voltages to the DEV board. By disabling the AUDINT3’s clocks, external
clocks can be applied to the MAX98050 without conicting with the clocks from the AUDINT3.
Interface Selection Selects the I2C hardware interface to either the Audio Interface 3 (AUDINT3) or an I2C bridge
(not supported).
Activate Demo Mode Puts the software in demo mode.
VIEW
Communication Log Toggles the Log sheet display in the Device Registers Control Tabbed Pages.
HELP
View Help Links to technical documents.
About Provides information about the MAX98050 evaluation software.

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MAX98050 Evaluation System
Detailed Description of Hardware
The MAX98050 EV system is designed to allow for a
thorough evaluation of the MAX98050 low-power, high-
performance audio CODEC with integrated low-latency
digital lters for wireless hearables, headsets, and head-
phones. The EV system includes two MAX98050 develop-
ment boards (DEV board), Maxim’s Audio Interface Board
III (AUDINT3), Dual EV Kit Adapter board, and USB cable.
The DEV board can be evaluated as a standalone board
that is driven directly by audio test equipment, powered by
multiple external supplies, and congured by an external
I2C capable controller. To simplify the evaluation, the DEV
boards can be evaluated with just the AUDINT3 board, or
the AUDINT3 board and the Dual EV Kit Adapter board for
stereo applications. This symplied hardware combination
provides an easy-to-use method for exercising the capa-
bilities of the device with no additional audio equipment.
The AUDINT3 board provides on-board LDO regulators,
USB-to-PCM, and USB-to-I2C interfaces. The AUDINT3
LDO regulators are used to power the device’s supply
rails through connector J1. The USB-to-PCM converter
accepts a USB audio stream from a USB connected com-
puter and converts that into an I2S data stream, allowing
for USB audio playback through the MAX98050 device.
The USB-to-I2C interface is the bridge that allows the
evaluation software to congure, monitor, and control the
I2C capable devices on the DEV and AUDINT3 boards.
Power Supplies
The DEV board requires at least three external power
supplies when evaluated as a stand-alone board. The
power supplies and their ranges are listed in Table 3. The
external supply voltages can be connected at the respec-
tive supply test points (see the Simplied EV System
Block Diagram for MAX98050: Stereo Hardware Setup).
When using the AUDINT3 board, its LDO regulators are
used to power the device’s supply rails through connec-
tor J1. The Dual EV Kit Adapter board is used in stereo
applications to distribute the AUDINT3’s power outputs
and digital clocks. See the Digital Audio Interface (DAI)
section.
Jumper JU2 is used to select the input voltage for
MBVDD, the microphone bias supply generator in the
MAX98050 (see Table 4). Using JU2, MBVDD can be
connected to either 1.8V (AVDD1) or 3.3V, both supplied
by the AUDINT3. Alternatively, an external voltage can be
applied to MBVDD by leaving JU2 open, and connecting
the external supply to test pin MBVDD.
Hardware Enable
The DEV board includes jumper JU1 to control HW_EN,
the device hardware enable. Table 5 describes the JU1
configuration options.
Note: Before starting evaluation, ensure that the jumper
is configured as needed.
Device Address
The MAX98050 I2C device address can be config-
ured to one of four values: 0x62, 0x64, 0x66, and
0x68. The device address is set by using jumper JMP1
(see Table 6).
Table 3. Power Supplies
Table 5. Jumper Configuration
Table 4. Microphone Bias Input Supply
Selection Using JU2 Table 6. I2C Address Selection
Using JMP1
Note: Only one jumper should be used on JMP1.
POWER SUPPLY RANGE (V)
MBVDD 1.3V to 4.8V
AVDD1 1.71V to 1.95V
AVDD2 1.1V to 1.3V
DVDDIO 1.1V to 1.95V
DVDD 1.1V to 1.3V
HEADER SHUNT
POSITION DESCRIPTION
JU2
3.3V to
MBVDD
Microphone bias input
supply connected to 3.3V
AVDD1 to
MBVDD
Microphone bias input
supply connected to AVDD1
HEADER SHUNT POSITION DESCRIPTION
JU1 HW_EN to DVDDIO Normal operation
HW_EN to GND Device is reset
SIGNAL PIN PIN SIGNAL I2C ADDRESS
ADDR 1
3 DVDDIO 0x62
5 GND 0x64
4SDA 0x66
2 SCL 0x68

Maxim Integrated │ 12
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Evaluates: MAX98050
MAX98050 Evaluation System
When both DEV boards are being used in a stereo con-
figuration, be sure that each board has a different I2C
address set. When used with Hearable Sound Studio
Basic, one DEV board should be set to 0x62, and the
other DEV board should be set to 0x64.
In a stereo application, both devices can be written to at
the same time using the Group Write Address feature in
the MAX98050. To enable this feature, click on the I2C
block in the block diagram in the MAX98050 evaluation
software, and click on I2C Group Write Address, which
can only be made active when two I2C addresses are
detected. To write to both devices at the same time,
change the address in the Active Device pulldown to
0x6A, so that both devices can be written to synchro-
nously. When Group Write Address mode is enabled, and
address 0x6A is selected, both devices are simultane-
ously written any time a control/register is changed.
Digital Audio Interface (DAI)
The device DAI is routed to interface header J2 as well
as the AUDINT3 connector J1. The interface headers
provide easy access to the device’s PCM bus, and the
AUDINT3 connector allows for USB audio to be streamed
onto the DEV board. See the USB Audio Input section
for details on USB audio streaming and Table 7 for the
connector J1 pinout.
DAI Header
The DAI header (J2) provides access to the MAX98050
PCM bus (BCLK, LRCLK, DIN, and DOUT). This DAI
header facilitates evaluation with audio equipment I/O. See
Table 8 for the pinout of the DAI headers and Figure 8 for
an illustration of how the MAX98050 DAI interface is routed
through the DAI headers to the AUDINT3 connector.
Microphone Inputs
The MAX98050 allows three microphone input channels to
operate concurrently. The three microphone input channels
can accept any combination of digital microphone or ana-
log microphone as input sources. There are three analog
microphone interface inputs available using 3.5mm sockets
(J6-J8) or headers (J10-J12) and three digital microphone
interface inputs available using headers (J3-J5). See
the MAX98050 EV Kit Schematic Diagrams for detailed
connection options on the microphone inputs.
Three Digital Microphone (DMIC) Inputs
Each of the headers J3 to J5 provides the following
connections:
●DVDDIO supply as power supply for external DMIC
● DMC to connect the MAX98050 DMIC clock output to
external DMIC clock input
●DMD to connect the MAX98050 DMIC data input to
external DMIC data output
Table 7. AUDINT3 Connector (J1)
Table 8. DAI Header (Portion of J2)
Figure 8. MAX98050 DAI Interface Headers (PCM)
SIGNAL PIN SIGNAL PIN SIGNAL PIN
—1AUDINT_MCLK 2 GND 3
BCLK2 4AUDINT_BCLK 5 GPIO1 6
LRCLK2 7 AUDINT_LRCLK 8 GPIO2 9
DAC2 10 AUDINT_DIN 11 GPIO3 12
ADC2 13 AUDINT_DOUT 14 GPIO4 15
—16 ID 17 3.3V 18
AVDD 19 DVDD 20 GND 21
HPVD 22 VDDIO 23 GND 24
GND 25 SDA 26 5V 27
— 28 SCL 29 5V 30
GND 31 IRQ 32 RESET 33
—34 DMD2 35 DMC1 36
GND 37 DMD1 38 DMD3 39
SIGNAL PIN PIN SIGNAL
GND 5 6BCLK
GND 7 8 LRCLK
GND 9 10 DIN
GND 11 12 DOUT
J1 J2
SIG GND MAX98 050
DIGITAL AUDIO
INTERFACE
DIN
L RC LK
BCL K
DOUT

Maxim Integrated │ 13
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Evaluates: MAX98050
MAX98050 Evaluation System
Table 9, Table 10, and Table 11 show the connections for
each of the DMIC input channels.
See the MAX98050 EV Kit Schematic Diagrams for
details of how the DMIC input channels are routed to the
DMIC headers.
Three Analog Microphone (AMIC) Inputs
The MAX98050 features three differential AMIC inputs
which can connect to differential or single-ended external
analog microphones. The 3.5mm 4-pole TRRS sockets
J6, J7, and J8 allow analog microphones to be connected
to the MAX98050 analog microphone inputs. The J6
socket can be configured for up to two AMIC inputs. The
single-ended or a differential external microphone con-
nections can be routed to the MAX98050 AMIC inputs
using resistor selection on the board. See the MAX98050
EV Kit Schematic Diagrams for detailed connection
options on the microphone inputs.
The J6 socket allows the following connections:
● Differential microphone connection to AMIC1 inputs on
the MAX98050
●A single-ended microphone connection to AMIC1
inputs
● Two single-ended microphone connection to AMIC1
and AMIC2 analog microphone inputs
The J7 socket allows the following connections:
●Differential microphone connection to AMIC2 inputs on
the MAX98050
●A single-ended microphone connection to AMIC2 inputs
The J8 socket allows the following connections:
●Differential microphone connection to AMIC3 inputs
on the MAX98050
●A single-ended microphone connection to AMIC3
inputs
The external analog microphone needs a 3.5mm 4-pole
TRRS plug with the following connections for proper
microphone operation:
●AMIC Single-Ended:
• Mic Output Connected to Tip
• Mic GND to Ring2
• Mic Power Supply to Sleeve (MEMS Mic Only)
●AMIC Differential:
• Mic Output + Connected to Tip
• Mic Output - Connected to Ring1
• Mic GND to Ring2
• Mic Power Supply to Sleeve (MEMS Mic Only)
Table 12, Table 13, and Table 14 show how the AMIC
input channels on the MAX98050 connect to each of the
DEV board's 3.5mm sockets.
The connections from the 3.5mm sockets can be moni-
tored on J10-J12 headers. Alternatively, external AMICs
can also be connected to the MAX98050 DEV board
using these headers. Table 15, Table 16, and Table 17
show the connections of the header pins to the associated
3.5mm socket pins.
Table 9. DMIC1 Header (J3)
Table 12. J6 Socket
Table 13. J7 Socket
Table 10. DMIC2 Header (J4)
Table 11. DMIC3 Header (J5)
SIGNAL PIN PIN SIGNAL
GND 12DMC1
GND 3 4 DMD1
GND 5 6DVDDIO
SIGNAL PIN PIN SIGNAL
GND 12 DMC2
GND 3 4DMD2
GND 5 6DVDDIO
SIGNAL PIN PIN SIGNAL
GND 12 DMC3
GND 3 4DMD3
GND 5 6DVDDIO
SIGNAL PIN
INP1 Tip
INN1/INP2 Ring1
GND Ring2
MICBIAS1/MICBIAS2/AVDD1 Sleeve
SIGNAL PIN
INP2 Tip
INN2 Ring1
GND Ring2
MICBIAS1/MICBIAS2/AVDD1 Sleeve

Maxim Integrated │ 14
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Evaluates: MAX98050
MAX98050 Evaluation System
Single-Ended/Di󰀨erential
Input Connection
In addition to the 3.5mm socket connections, Table 18
shows recommended resistor options to connect the
MAX98050 AMIC inputs to both single-ended and differ-
ential external analog microphones.
The DEV board includes 2.2µF DC blocking capacitors on
C18-C23 by default. The DC blocking corner frequency
can be adjusted by changing the value of the C18-
C23 capacitors. See the MAX98050 EV Kit Schematic
Diagrams for more details.
Electret Condensor Microphone (ECM)
The microphone bias outputs of the MAX98050 and the
pullup and pulldown resistors on the MAX98050 DEV
board allow easy connections to external ECM-type ana-
log microphones. See Table 18 for typical components
that need to be installed for single-ended or differential
ECM microphone connections. The microphone bias out-
put level, R_PULLUP, and R_PULLDOWN resistor selec-
tion is determined by the ECM microphone supplier's
recommended bias point selection.
Analog Micro-Electro-Mechanical System
(MEMS) Microphone
The MAX98050 DEV board provides simple connections
to connect external analog MEMs microphones to the
AMIC inputs of the MAX98050. See Table 18 for typical
components that need to be installed for single-ended or
differential analog MEMS microphone connections. The
microphone bias output level is determined by the MEMs
microphone supplier's recommended supply level.
Table 14. J8 Socket
Table 15. J10 Header
Table 18. Analog Microphone Configuration
Table 16. J11 Header
Table 17. J12 Header
SIGNAL PIN
INP3 Tip
INN3 Ring1
GND Ring2
MICBIAS1/MICBIAS3/AVDD1 Sleeve
SIGNAL PIN
INP1 1
INN1/INP2 2
GND 3
MICBIAS1/MICBIAS2/AVDD1 4
SIGNAL PIN
INP2 1
INN2 2
GND 3
MICBIAS1/MICBIAS2/AVDD1 4
SIGNAL PIN
INP3 1
INN3 2
GND 3
MICBIAS1/MICBIAS3/AVDD1 4
HEADER AMIC ECM
DIFFERENTIAL
AMIC ECM
SINGLE-ENDED
AMIC MEMS
DIFFERENTIAL
AMIC MEMS
SINGLE-ENDED
J6
R1, R2, R4 = 0Ω,
R7 = R_PULLUP,
R57 = R_PULLDOWN
R1, R4, R57 = 0Ω,
R7 = R_PULLUP R1, R2, R4 = 0ΩR1, R4, R57 = 0Ω
J7
R10, R11, R13 = 0Ω,
R15 = R_PULLUP,
R59 = R_PULLDOWN
R10, R13, R59 = 0Ω,
R15 = R_PULLUP R10, R11, R13 = 0ΩR10, R13, R59 = 0Ω
J8
R17, R18, R20 = 0Ω,
R22 = R_PULLUP,
R61 = R_PULLDOWN
R20, R17, R61 = 0Ω,
R22 = R_PULLUP R17, R18, R20 = 0ΩR17, R20, R61 = 0Ω

Maxim Integrated │ 15
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Evaluates: MAX98050
MAX98050 Evaluation System
Microphone Bias
The MAX98050 provides three microphone bias outputs
(MICBIAS1, MICBIAS2, and MICBIAS3) to connect exter-
nal microphones to the microphone inputs of the device.
The microphone bias outputs use the MBVDD pin on the
MAX98050 as the input supply for the MICBIAS gen-
erator. The MBVDD pin is supplied either from AUDINT3
board supplies through JU2 or supplied externally using
the MBVDD test point. In addition to providing power for
ECM microphones, the MICBIAS can also be used as
a power supply for MEMS microphones. The MICBIAS
output voltage level is programmable (1.2V to 3V), and
can be set through register control using the MAX98050
Evaluation Software.
The microphone bias outputs are routed to the "Sleeve"
connection on the J6-J8 sockets and are resistor selectable
for that external AMIC connection. Table 12, Table 13, and
Table 14 show which microphone bias outputs are routed to
each 3.5mm socket on the MAX98050 DEV board. See the
MAX98050 EV Kit Schematic Diagrams for resistor selec-
tion information on a particular analog microphone path.
Headphone Output
The MAX98050 differential headphone output, OUTP/
OUTN, is routed to the J14 header, wire loops, and the J9
socket on the DEV board. The DEV board is, by default,
assembled to allow the MAX98050 output to connect
directly to a headphone load without the need for filter-
ing. To ensure proper operation of an external headset,
always disable the DEV board before connecting or dis-
connecting the headset. The 3.5mm 4-pole TRRS socket
J9 is preconfigured for the differential OUTP/OUTN head-
phone outputs. See Table 19.
For quick evaluation, a standard 3.5mm mono headphone
(without a microphone) can be used with socket J9 if
resistor shorts R62 and R63 are removed, allowing Ring2
and Sleeve to float, see the MAX98050 EV Kit Schematic
Diagrams.
EMI Filter
In some applications, when a very long headphone cable
is used with the MAX98050 headphone output, an output
filter (i.e., ferrite bead or inductor, plus capacitor) can be
installed to help prevent excessive EMI radiation. It is best
to choose filter components based on EMI test results.
PCB footprints have been provided. Before adding the
filters to the design, first remove the 0Ω short installed
in the L1 and L2 locations (see the MAX98050 EV Kit
Schematic Diagrams and the MAX98050 EV Kit PCB
Layout Diagrams).
I2C Interface
The MAX98050’s I2C interface is routed to header J2
and connector J1. The J1 connector is for the AUDINT3
board and connects the device’s I2C interface to the I2C
interface of the AUDINT3 board. This connection allows
the MAX98050 evaluation software to read and write to
the device. The AUDINT3 board has I2C pullup resistors.
See Table 7.
A portion of header J2 allows for an external I2C controller
to connect to the device’s I2C bus as well as test points
SDA and SCL. See Table 20 for more information about
J2.
Audio Interface Board III
Maxim’s Audio Interface Board III (AUDINT3 board) facili-
tates the evaluation of the DEV board by providing a set
of features that can be used to exercise the capabilities
of the DEV board without the need for additional audio
equipment. The main components of the AUDINT3 board
are LDO supply voltages and USB-to-I2C and USB-to-
PCM interfaces. All the necessary supply voltages for
the MAX98050 are supplied by the AUDINT3 board. No
external supplies are needed for evaluation. The USB-to-
PCM converter allows any Windows 10 PC to be used as
an audio source for the DEV board’s digital audio PCM
interface, and the USB-to-I2C interface allows for the use
of the MAX98050 evaluation software, making device
configuration and monitoring simpler.
The DEV board connects to the AUDINT3 board through
connector J1. The physical connections made between
the DEV board and AUDINT3 board are listed in Table 7.
USB Audio Input
To utilize the USB streaming feature of the AUDINT3
board, connect the USB cable from the computer to the
micro USB connector J2 on the AUDINT3 board and
ensure that the AUDINT3 board is connected to the
DEV board directly, for mono, or through the Dual EV Kit
Adapter for a stereo DEV board configuration.
Once the hardware is ready, use the MAX98050 Evaluation
Software to configure and enable the device for DAI audio
playback.
Table 19. J9 Socket
SIGNAL PIN
FOUTP Tip
FOUTN Ring1
GND Ring2
GND Sleeve

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Evaluates: MAX98050
MAX98050 Evaluation System
#Denotes RoHS compliant.
Table 20. I2C Header (Portion of J2)
PART TYPE
MAX98050EVSYS# Complete Evaluation System for the
MAX98050
SIGNAL PIN PIN SIGNAL
GND 13 14 SDA
GND 15 16 SCL
MAX98050 EV Kit Bill of Materials
Ordering Information
ITEM QTY REF DES MAXINV MFG PART # MANUFACTURER VALUE DESCRIPTION
124
ADDR, AVDD1_REG,
D3, DMC1-DMC3,
DMD1-DMD3,
INN1-INN3,
INN1_M-INN3_M,
INP1-INP3,
INP1_M-INP3_M,
MICBIAS1-MICBIAS3
02-TPMINI5002-00 5002 KEYSTONE N/A TEST POINT; PIN DIA=0.1IN; TOTAL LENGTH=0.3IN; BOARD HOLE=0.04IN;
WHITE; PHOSPHOR BRONZE WIRE SILVER; NOT FOR COLD TEST
2 5 AVDD1, AVDD2/AVDD3,
DVDD, DVDDIO, MBVDD 02-TPMINI5010-00 5010 KEYSTONE N/A TEST POINT; PIN DIA=0.125IN; TOTAL LENGTH=0.445IN; BOARD HOLE=0.063IN; RED; PHOSPHOR BRONZE WIRE SIL; NOT FOR COLD TEST
3 5 BCLK, DIN, DOUT,
IRQ, LRCLK 02-TPMINI5003-00 5003 KEYSTONE N/A
TEST POINT; PIN DIA=0.1IN; TOTAL LENGTH=0.3IN; BOARD HOLE=0.04IN;
ORANGE; PHOSPHOR BRONZE WIRE SILVER PLATE FINISH;
RECOMMENDED FOR BOARD THICKNESS=0.062IN; NOT FOR COLD TEST
4 1 C8 20-000U1-D5
C0201C104K9PAC;
GRM033R60J104KE19;
C0603X5R0J104K030BC;
C0201X5R6R3-104KNP
KEMET; MURATA;
VENKEL; TDK 0.1UF CAP; SMT (0201); 0.1UF; 10%; 6.3V; X5R; CERAMIC
5 5 C9-C12, C14 20-0001U-AA20 GRM033R61A105ME15 MURATA 1UF CAP; SMT (0201); 1UF; 20% ; 10V; X5R; CERAMIC
6 1 C15 20-002U2-61 GRM033R61A225KE47 MURATA 2.2UF CAP; SMT (0201); 2.2UF; 10% ; 10V; X5R; CERAMIC
7 2 C16, C17 20-00U01-I6
C0603X7R1A103K030BA;
GRM033R71A103KA01;
GCM033R71A103KA03;
CGA1A2X7R1A103K030BA;
0201ZC103KAT2A
TDK; MURATA;
MURATA; TDK; AVX 0.01UF CAP; SMT (0201); 0.01UF; 10% ; 10V; X7R; CERAMIC
8 6 C18-C23 20-002U2-BA97 GRM188C71E225KE11 MURATA 2.2UF CAP; SMT (0603); 2.2UF; 10% ; 25V; X7S; CERAMIC
9 8 GND1-GND6,
OUTN, OUTP 01-9020BUSS20AWG-00 9020 BUSS WEICO WIRE MAXIMPAD EVK KIT PARTS; MAXIM PAD; WIRE; NATURAL; SOLID; WEICO WIRE; SOFT DRAWN BUS TYPE-S; 20AWG
10 1HW_EN 02-TPMINI5116-00 5116 KEYSTONE N/A
TEST POINT; PIN DIA=0.1IN; TOTAL LENGTH=0.3IN; BOARD HOLE=0.04IN;
GREEN; PHOSPHOR BRONZE WIRE SILVER PLATE FINISH;
RECOMMENDED FOR BOARD THICKNESS=0.062IN; NOT FOR COLD TEST
11 1J1 01-TSW11308GTRA39P-19 TSW-113-08-G-T-RA SAMTEC TSW-113-08-G-T-RA EVKIT PART; CONNECTOR; MALE; THROUGH HOLE; 0.025IN SQ POST HEADER;
RIGHT ANGLE; 39PINS; MODIFY PIN NUMBERING ARRANGEMENT
12 1J2 01-303266002HB26P-19 30326-6002HB 3M ELECTRONIC
SOLUTIONS DIVISION 30326-6002HB CONNECTOR; MALE; THROUGH HOLE; LOW PROFILE HEADER; STRAIGHT; 26PINS
13 3J3-J5 01-PEC03DAAN6P-21 PEC03DAAN SULLINS
ELECTRONICS CORP. PEC03DAAN CONNECTOR; MALE; THROUGH HOLE; BREAKAWAY; STRAIGHT THROUGH; 6PINS; -65 DEGC TO +125 DEGC
14 1J6 EH111000003862 SJ-43516-SMT-TR-PI CUI INC SJ-43516-SMT-TR-PI
CONNECTOR; FEMALE; SMT; 3.5 MM AUDIO JACKS; RIGHT ANGLE; 6PINS; PINK
15 1J7 EH111000003861 SJ-43516-SMT-TR-GR CUI INC SJ-43516-SMT-TR-GR
CONNECTOR; FEMALE; SMT; 3.5 MM AUDIO JACKS; RIGHT ANGLE; 6PINS; GREEN
16 1J8 EH111000003860 SJ-43516-SMT-TR-BE CUI INC SJ-43516-SMT-TR-BE
CONNECTOR; FEMALE; SMT; 3.5 MM AUDIO JACKS; RIGHT ANGLE; 6PINS; BLUE
17 1J9 01-SJ43514SMT6P-80 SJ-43514-SMT CUI INC. SJ-43514-SMT CONNECTOR; FEMALE; SMT; 3.5 MM AUDIO JACKS; RIGHT ANGLE; 6PINS
18 3J10-J12 01-TSW10423GS4P-17 TSW-104-23-G-S SAMTEC TSW-104-23-G-S CONNECTOR; THROUGH HOLE; SINGLE ROW; STRAIGHT; 4PINS

Maxim Integrated │ 17
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Evaluates: MAX98050
MAX98050 Evaluation System
MAX98050 EV Kit Bill of Materials (continued)
ITEM QTY REF DES MAXINV MFG PART # MANUFACTURER VALUE DESCRIPTION
19 1J13 01-PBC04DAAN8P-21 PBC04DAAN SULLINS
ELECTRONICS CORP. PBC04DAAN CONNECTOR; MALE; THROUGH HOLE; BREAKAWAY; STRAIGHT; 8PINS; -65 DEGC TO +125 DEGC
20 1J14 01-PCC02SAAN2P-21 PCC02SAAN SULLINS PCC02SAAN CONNECTOR; MALE; THROUGH HOLE; BREAKAWAY; STRAIGHT THROUGH;
2PINS; -65 DEGC TO +125 DEGC
21 1JMP1 01-PBC05SAAN5P-21 PBC05SAAN SULLINS
ELECTRONICS CORP. PBC05SAAN CONNECTOR; MALE; THROUGH HOLE; BREAKAWAY; STRAIGHT; 5PINS; -65 DEGC TO +125 DEGC
22 2JU1, JU2 01-PBC03SAAN3P-21 PBC03SAAN SULLINS PBC03SAAN CONNECTOR; MALE; THROUGH HOLE; BREAKAWAY; STRAIGHT;
3PINS; -65 DEGC TO +125 DEGC
23 2L1, L2 ER111000005900 CR1206-J/-000ELF BOURNS 0RES; SMT (1206); 0; 5% ; JUMPER; 0.2500W; NOTE: THIS PART HAS AN
SPECIAL INDUCTOR ALTERNATE SCHEMATIC SYMBOL
24 32
R1, R3, R4, R17,
R20, R29, R31-R34,
R36-R39, R43,
R44, R49-R55,
R57, R59, R61-R67
80-0000R-26A ERJ-2GE0R00 PANASONIC 0RES; SMT (0402); 0; JUMPER; JUMPER; 0.1000W
25 1R28 80-004K7-18 ERJ-2RKF4701 PANASONIC 4.7K RES; SMT (0402); 4.7K; 1% ; +/-100PPM/DEGC; 0.1000W
26 1R30 80-016K9-18 CRCW040216K9FK;
ERJ-2RKF1692
VISHAY DALE;
PANASONIC 16.9K RES; SMT (0402); 16.9K; 1% ; +/-100PPM/DEGK; 0.1000W
27 2SCL, SDA 02-TPMINI5004-00 5004 KEYSTONE N/A
TEST POINT; PIN DIA=0.1IN; TOTAL LENGTH=0.3IN; BOARD HOLE=0.04IN;
YELLOW; PHOSPHOR BRONZE WIRE SILVER PLATE FINISH;
RECOMMENDED FOR BOARD THICKNESS=0.062IN; NOT FOR COLD TEST
28 4SPACER1-SPACER4 02-MS440038P-02
91772A108;
PHILLIPS-PAN_4-40X3/8IN;
PMSSS4400038PH; 9901
GENERIC PART N/A
MACHINE SCREW; PHILLIPS; PAN; 4-40; 3/8IN; 18-8 STAINLESS STEEL;
NOTE: SET TO OBSOLETE FOR PART NUMBER CORRECTION.
KINDLY REFER TO PART NUMBER 91772A108;9901
29 4SPACER1-SPACER4 02-SO440012H-01 MCH_SO_F_HEX_4-40X1/2 GENERIC PART N/A STANDOFF; FEMALE-THREADED; HEX; 4-40; 1/2IN; ALUMINUM
30 3SU1-SU3 02-JMPFS1100B-00 S1100-B;SX1100-B;
STC02SYAN
KYCON; KYCON;
SULLINS ELECTRONICS
CORP.
SX1100-B TEST POINT; JUMPER; STR; TOTAL LENGTH=0.24IN; BLACK;
INSULATION=PBT;PHOSPHOR BRONZE CONTACT=GOLD PLATED
31 1U1 00-SAMPLE-01 MAX98050 MAXIM MAX98050
EVKIT PART - IC; MAX98050; LOW POWER; HIGH PERFORMANCE
ANC AUDIO CODEC; PACKAGE OUTLINE DRAWING: 21-100435;
PACKAGE CODE: N362E2+1
32 1PCB N/A MAX98050_DEV_APPS_A MAXIM PCB PCB:MAX98050_DEV_APPS_A
TOTAL 126
ITEM QTY REF DES MAXINV MFG PART # MANUFACTURER VALUE DESCRIPTION
1 2 C26, C27 N/A N/A N/A OPEN PACKAGE OUTLINE 0603 NON-POLAR CAPACITOR - EVKIT
2 3 C36-C38 N/A N/A N/A OPEN PACKAGE OUTLINE 0201 NON-POLAR CAPACITOR - EVKIT
330
R2, R5-R16,
R18, R19,
R21-R23,
R25-R27,
R40-R42, R56, R58,
R60, R68-R70
N/A N/A N/A OPEN PACKAGE OUTLINE 0402 RESISTOR - EVKIT
417 C1-C7, C24,
C25, C28-C35 N/A N/A N/A OPEN PACKAGE OUTLINE 0402 NON-POLAR CAPACITOR - EVKIT
TOTAL 52
DO NOT PURCHASE(DNP)

Maxim Integrated │ 18
www.maximintegrated.com
Evaluates: MAX98050
MAX98050 Evaluation System
MAX98050 EV Kit Schematic Diagrams
HEADPHONE OUTPUT
ANALOG MIC 2
ANALOG MIC 3
ANALOG MIC 1
DIGITAL MIC 2 DIGITAL MIC 3
I2C
PCM
DIGITAL MIC 1
OPEN
PCC02SAAN
0
OPEN
OPEN
OPEN
OPEN
0
0
OPEN
OPEN
GND
2.2UF
OPEN
OPEN
OPEN
0
0
OPEN
OPEN OPEN
0
0
GND
GND
OPEN
GND
OPEN
0
0
2.2UF
0.01UF
2.2UF
DVDDIO
OPEN
OPEN
0
OPEN OPEN
GND
1UF
OPEN
DVDDIO
0
2.2UF 2.2UF
DVDD
1UF
0.1UF
0
0
0
OPEN
1UF1UF 1UF
AVDD1 AVDD2 MBVDD
0.01UF
0
GND
2.2UF
OPEN
2.2UF
OPEN
MAX98050
OPEN
OPEN
0
L1
L2
GND6
C38
C37
C36
INN3_M INP3_M
INN2_M INP2_M
INN1_M INP1_M
OUTN
OUTP
GND5
GND4 GND3
J14
R42R41R40
R61R60R59R58R57R56
C17
GND2 GND1
C16
C34
C31 C35
C30
C33
C32
R52 R53 R50 R51 R55 R54
SDA
HW_EN
C28
C26
C25
C29
C27
C24
C20 C23 C22 C19 C18 C21
R43
D3
IRQSCL
ADDR
INN3
INP3
INN2
INP2
INN1
INP1
DMD3
DMC3
DMD2
DMC2
DMD1
DMC1
AVDD1_REG
MICBIAS3
MICBIAS2
MICBIAS1
C15
C14C10 C12C11
C9C8
DVDDIO DVDD
AVDD1
AVDD2/AVDD3
MBVDD
R39
C7
C5
R37 R36
C4
DOUT
BCLK
LRCLK
DIN
C6
R38
U1
FOUTP
FOUTN
DMD1
INP1 INN1
MICBIAS3
INP2
DMC2
DIN
DOUT
DMD3
MICBIAS1
SDA
SCL
IRQ
DMC3
DMD2
BCLK
DMC1
INN2
INP3
LRCLK
MICBIAS2
INN3
HW_EN
ADDR
21
21
2 1
F6
F5
F4
F3
F2
F1
E6
E5
E4 E3 E2
E1
D6
D5 D4
D3
D2 D1
C6
C5 C4
C3 C2 C1
B6
B5 B4
B3 B2 B1
A6
A5 A4
A3 A2 A1
OUTN
AVDD2
DGND
DVDDIO
DVDD
SDA
OUTP
AVDD3
MICBIAS3
HW_EN
ADDR
SCL
AVDD1
MICBIAS1 MICBIAS2
I.C
IRQ BCLK
AVDD1_REG
INN1
INP1
DMC1 DMD1 LRCLK
GND
INN2
INP2
DMC2 DMD2 DIN
MBVDD
INN3
INP3
DMC3 DMD3 DOUT

Maxim Integrated │ 19
www.maximintegrated.com
Evaluates: MAX98050
MAX98050 Evaluation System
ANALOG MICS
J6
ECM DIFF
R_PULLDOWN R1, R4,R7=R_PULLUP,R57
ECM SE MEMS DIFF
R1, R2 R4 R10, R11
R1, R4, R57
R10, R13, R17, R20,
R59 R59
R61
R17, R18 R13 R20
MEMS SE
AMIC 1
DIGITAL MICS
SL
R1
R2
(PDM)
AMIC1+AMIC2
AMIC1/
DMIC1 DMIC3
TIP
R1
R2
SL
TIP
R1
DMIC2 (PDM)
AMIC3
TIP
AMIC2
AMIC 2
(PDM)
SL
R2
HEADER
J7
AMIC 3
ANALOG MIC CONFIGURATIONS
R1, R2,R4,R7=R_PULLUP,
R17, R61 R20,R22=R_PULLUP,
R61=R_PULLDOWN,R17,R18
R10, R11,R13,R15=RPULLUP
R59-R_PULLDOWN
R20,R22=RPULLUP,
R10, R13, R15 = R_PULLUP,
J8
AVDD1
OPEN
OPEN
OPEN OPEN
OPEN
OPEN
OPEN
OPEN
0
PBC04DAAN PEC03DAAN PEC03DAAN
SJ-43516-SMT-TR-BE
TSW-104-23-G-S
OPEN OPEN
OPEN
OPEN
0
0
OPEN
OPEN
OPEN
0
OPEN OPEN
TSW-104-23-G-S
OPEN
OPEN OPEN OPEN
OPEN
OPEN
DVDDIO
OPEN
DVDDIO
0
TSW-104-23-G-S
SJ-43516-SMT-TR-PI
SJ-43516-SMT-TR-GR
AVDD1
PEC03DAAN
DVDDIO
OPEN
OPEN
AVDD1
OPEN
R10
R13
R70R27 R69R26 R68R25
J5
J13
J3 J4
R8
J6 J8
R6
R4
R5
R2
R3
R1
C1
R7
R9
R12
R14
C2
R11
R15
R19
R20
R16
J10 J11
J12
J7
C3
R21
R18
R17
R22
R23
MICBIAS1 MICBIAS3 INN3 INP3
INP2B INP2A
MICBIAS1
DMD2
INP1 INN2 INN1
INP2A
INP2
DMC1 DMD1 DMC2
MICBIAS1 MICBIAS2
DMC3 DMD3
MICBIAS2
65 43 21 87 65 43 21 65 43 21 65 43 21
5 2 1 6 4 3 5 2 1 6 4 3
4
3
2
1
4
3
2
1
4
3
2
1
5 2 1 6 4 3
65
1 3 4
2
87 65
1 3 4
2
65
1 3 4
2
65
1 3 4
2
RING_SW
TIP_SW
RING2 RING1
TIP
SLEEVE
RING_SW
TIP_SW
RING2 RING1
TIP
SLEEVE
RING_SW
TIP_SW
RING2 RING1
TIP
SLEEVE
MAX98050 EV Kit Schematic Diagrams (continued)

Maxim Integrated │ 20
www.maximintegrated.com
Evaluates: MAX98050
MAX98050 Evaluation System
MAX98050 EV Kit Schematic Diagrams (continued)
SCL0X68
I2C
AUDINT3 CONNECTOR
RIBBON CABLE CONNECTOR
I2C ADDRESS PROGRAMMING
N/C
GND0X64
0X66 0X62
SDA
ADDR CONNECTED TO
DVDDIO
I2C SLAVE WRITE ADDRESS
HEADPHONE OUTPUT JACK
4.7K
DVDDIO
TSW-113-08-G-T-RA
0
DVDD
DVDDIO
AVDD1
AVDD2
AVDD2 MBVDD DVDDIO
DVDDIO
30326-6002HB
SJ-43514-SMT
0
0
0
0
0
AVDD1DVDD
0 0
0
0
16.9K
0
0
0
JMP1
R66
R64
R65
R67
J1
R62
R63J9
R28
JU1
R29
R44
JU2
J2
R49
R33 R31
R30
R34
R32
HW_EN
DMD3 DMC1
MBVDD
SCL
DOUT
LRCLK
DIN
AVDD2 AVDD1
DMD1
LRCLK BCLK
DVDD MBVDD SCL SDA
ADDR
FOUTN FOUTP
SCL
SDA
DIN DOUT
BCLK
IRQ
AVDD1
SDA
DMD2
5
4
3
2 1
39
38 37
36
35 34
33
32 31
30
29 28
27
26 25
24
23 22
21
20 19
18
17 16
15
14 13
12
11 10
9
8 7
6
5 4
3
2 1
2 1 4 3
3
2
1
3
2
1
26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
8 7 6 5 4 3 2 1
39
38
37
36
35 34
33
32
31
30
29
28
27
26
25
24
23 22
21
20
19
18
17
16
15
14
13
12
11
10
9
8 7
6
5 4
3
2 1
RING2 RING1
TIP
SLEEVE