Texas Instruments PGA2505EVMV2 User manual

User’s Guide
PGA2505EVMV2 Evaluation Module
ABSTRACT
This user’s guide describes the characteristics, operation, and use of the PGA2505EVMV2, a refreshed
evaluation module (EVM) compatible with the PGA2505 on a modern operating system. This document includes
the schematic, printed circuit board (PCB) layout, and bill of materials (BOM). Throughout this document, the
terms evaluation board, evaluation module, and EVM are synonymous with the universal PGA2505EVMV2.
Table of Contents
1 Product Overview................................................................................................................................................................... 3
2 Features...................................................................................................................................................................................6
3 Getting Started........................................................................................................................................................................7
3.1 Electrostatic Discharge Caution......................................................................................................................................... 7
3.2 Unpacking the EVM........................................................................................................................................................... 7
3.3 Absolute Maximum Operating Conditions..........................................................................................................................8
4 Setup Guide.............................................................................................................................................................................9
4.1 Analog and Digital Power Supplies.................................................................................................................................... 9
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4.2 Microphone Input............................................................................................................................................................. 10
4.3 Phantom Power Connections...........................................................................................................................................10
4.4 DC Blocking Capacitors................................................................................................................................................... 10
4.5 Protection Network...........................................................................................................................................................10
4.6 Configurable Input Circuitry..............................................................................................................................................11
4.7 Configurable Output Circuitry and Preamp Output Connector......................................................................................... 11
5 Software Operation...............................................................................................................................................................12
5.1 Applications Software Overview.......................................................................................................................................12
5.2 Using the GUI...................................................................................................................................................................12
6 Schematic, PCB Layout, and Bill of Materials................................................................................................................... 13
6.1 Schematic........................................................................................................................................................................ 13
6.2 PCB Layout...................................................................................................................................................................... 14
6.3 Bill of Materials.................................................................................................................................................................16
List of Figures
Figure 1-1. PGA2505 Functional Block Diagram.........................................................................................................................3
Figure 1-2. PGA2505EVMV2 GUI............................................................................................................................................... 4
Figure 1-3. PGA2505 16-Bit Control............................................................................................................................................4
Figure 3-1. PGA2505EVMV2 With MSP430™ Microcontroller Connected................................................................................. 7
Figure 4-1. Power Terminal Block J2 Schematic......................................................................................................................... 9
Figure 4-2. Microphone Input Connector Configuration.............................................................................................................10
Figure 5-1. PGA2505EVMV2 GUI With Programmable Functions............................................................................................12
Figure 6-1. PGA2505EVMV2 Schematic...................................................................................................................................13
Figure 6-2. PGA2505EVMV2 Top Overlay................................................................................................................................ 14
Figure 6-3. PGA2505EVMV2 Top Layer....................................................................................................................................15
Figure 6-4. PGA2505EVMV2 Bottom Layer.............................................................................................................................. 15
List of Tables
Table 3-1. PGA2505EVMV2 Absolute Maximum Ratings........................................................................................................... 8
Table 6-1. PGA2505EVMV2 BOM............................................................................................................................................. 16
Trademarks
MSP430™ is a trademark of Texas Instruments.
All trademarks are the property of their respective owners.
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1 Product Overview
The PGA2505 is a digitally-controlled, microphone preamplifier integrated circuit designed for amplifying the
output of dynamic and condenser microphones and driving high-performance audio analog-to-digital converters
(ADCs). Figure 1-1 shows a functional block diagram of the PGA2505.
SERIAL PORT
and
LOGIC CONTROL
PGA
DC
Servo
CS1
CS2
GPO1
GPO2
GPO3
GPO4
VIN+
VIN–
AGND
VA+
VA–
CS
SCLK
SDI
SDO
OVR
VCOMIN
VOUT+
VOUT–
DGND
VD–
Figure 1-1. PGA2505 Functional Block Diagram
The analog input to the preamplifier is provided differentially at the VIN+ and VIN− inputs (pins 24 and 23,
respectively). The programmable gain amplifier can be programmed to either pass through the signal at unity
gain, or apply 9 dB to 60 dB of gain to the input signal. The gain of the amplifier is adjustable over the full 9-dB
to 60-dB range in 3-dB steps. The differential output of the PGA2505 is made available at VOUT+ and VOUT−
(pins 15 and 14, respectively). Gain is controlled using a MSP430F5529 microcontroller and PGA2505EVMV2
graphical user interface (GUI), which can be accessed here. The microcontroller and GUI are used to program
the PGA2505 gain and support functions, as shown in Figure 1-2.
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Figure 1-2. PGA2505EVMV2 GUI
A 16-bit control word is utilized to program these functions; see Figure 1-3.
...
Data Ignored DC CM ZC OR D4 D3 D2 D1 0 0 G5 G4 G3 G2 G1 G0 Data Ignored
High Impedance DC CM ZC OR D4 D3 D2 D1 0 0 G5 G4 G3 G2 G1 G0 High Impedance
DC Servo Enable
(Active Low)
CM Servo Enable
(Active High)
Zero Crossing Detect
(Active High)
Over-Range Indicator Bit
(0 = 5.1VRMS, 1 = 4.0VRMS
Data for GPO4
Data for GPO3
Data for GPO2
Data for GPO1
Preamplifier Gain
where N = G[5:0]DEC
For N = 0
Gain = 0dB
For N = 1 to 17
Gain (dB) = 6 + 3N
For N = 18 to 31
Gain = 60dB
CS
SCLK
SDI
SDO
Figure 1-3. PGA2505 16-Bit Control
The differential analog output of the PGA2505 is constantly monitored by a dc servo amplifier loop. The purpose
of the servo loop is to minimize the dc offset voltage present at the analog outputs by feeding back an error
signal to the input stage of the programmable gain amplifier. The error signal is then used to correct the offset.
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The dc servo may be enabled by checking the DC Servo checkbox in the GUI. To disable this function, leave the
DC Servo checkbox in the GUI unchecked.
Two external capacitors are required for the dc servo function, with one capacitor connected between CS11
(pin 21) and CS12 (pin 20), and the second capacitor connected between CS21 (pin 19) and CS22 (pin 18).
Capacitor values up to 4.7 µF may be used. However, larger-value capacitors result in longer settling times for
the dc servo loop. A value of 1 µF is recommended for use in most microphone preamplifier applications.
The PGA2505 includes a common-mode servo function. This function is enabled and disabled using the CM bit
in the serial control word, as shown in Figure 1-3, or by checking the CM Servo checkbox in the GUI. When
enabled, the servo provides common-mode negative feedback at the input differential pair, resulting in very low
common-mode input impedance. The differential input impedance is not affected by this feedback. This function
is useful when the source is floating, or has a high common-mode output impedance. In this case, the only
connection between the source and the ground is through the PGA2505 preamplifier input resistance.
In this case, input common-mode parasitic current is determined by high output impedance of the source,
not by input impedance of the amplifier. Therefore, input common-mode interference is reduced by lowering
the common-mode input impedance while not increasing the input common-mode current. Increasing common-
mode current degrades common-mode rejection. Using the common-mode servo, overall common-mode
rejection is improved by suppressing low and medium frequency common-mode interference.
The common-mode servo function is designed to operate with a total common mode input capacitance (including
the microphone cable capacitance) of up to 10 nF. Beyond this limit, stable servo operation is not ensured.
The common-mode voltage control input, VCOMIN (pin 22), allows the PGA2505 output and input to be dc
biased to a common-mode voltage between 0 V and 2.5 V. The VCOMIN pin allows for a dc-coupled interface
between the PGA2505 preamplifier output and the inputs of common, single-supply, audio analog-to-digital
converters (ADCs).
The PGA2505 may be forced to unity. Check the Unity Gain checkbox in the GUI to activate this function.
The zero-crossing control input is provided for enabling and disabling the internal zero-crossing detector
function. Forcing the zero-crossing input high enables the function, check the Zero Crossing Detect checkbox in
the GUI to activate this function. Zero-crossing detection is used to force gain changes on zero crossings of the
analog input signal. This limits the glitch energy associated with the switched gain network, thereby minimizing
audible artifacts at the preamplifier output. Zero-crossing detection can add some delay when performing gain
changes (up to 16 ms maximum for a detector timeout event). Therefore, there may be cases where the function
must be discabled. Forcing the zero cross detect input low (unchecking the checkbox in the GUI) disables
zero-crossing detection, with gain changes occurring immediately when programmed.
An overflow indicator output, OVR, is provided at pin 6. The OVR pin is an active high, CMOS-logic-level output.
The overflow output is forced high when the preamplifier output voltage exceeds one of two preset thresholds.
The threshold is programmed through the GUI using the Overload Indicator (RMS) drop-down menu. When
the Overload Indicator (RMS) option is set to 5.1V RMS differential, that is approximately −1 dB less than the
specified output voltage range. When the Overload Indicator (RMS) option is set to 4.0V RMS differential, that is
approximately −3 dB less than the specified output voltage range.
The PGA2505 includes four general-purpose, programmable digital outputs, GPO1 through GPO4 (pins 2
through 5, respectively), that are controlled using the GUI checkboxes. All four pins are CMOS-logic-level
outputs. These pins may be used to control relay drivers or switches used for external preamplifier functions,
including input pads, filtering, polarity reversal, or phantom power.
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2 Features
The PGA2505EVMV2 provides a convenient platform for evaluating the performance and features of the
PGA2505 product. Key EVM features include the following:
• Accepts either XLR or TRS balanced input connections
• Configurable front-end circuit options for prototyping pads and filters
• XLR and TRS balanced output with flexible output loading options
• LED indicators for GPOs and the over range output
• Common-mode voltage input (VCOMIN) pin
• Includes applications software that is compatible with personal computers that include a built-in USB port
• Requires +5-V and −5-V analog supplies, as well as a +5-V digital supply
– Leave the +5-V digital supply (VCC) unconnected if using the MSP-EXP430F5529LP
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3 Getting Started
This section provides information regarding PGA2505EVMV2 handling and unpacking, as well as the absolute
operating conditions.
3.1 Electrostatic Discharge Caution
CAUTION
Many of the components on the PGA2505EVMV2 are susceptible to damage by electrostatic
discharge (ESD). Customers are advised to observe proper ESD handling precautions when
unpacking and handling the EVM. Failure to observe ESD handling procedures may result in
damage to the EVM components.
3.2 Unpacking the EVM
In addition to the PGA2505EVMV2 evaluation module board, order and unpack the MSP-EXP430F5529LP,
MSP430F5529 USB LaunchPad development kit. Plug in the MSP430™ microcontroller on top of the
PGA2505EVMV2, as shown in Figure 3-1.
Figure 3-1. PGA2505EVMV2 With MSP430™ Microcontroller Connected
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3.3 Absolute Maximum Operating Conditions
Be aware of the absolute maximum operating conditions for the evaluation module. Table 3-1 summarizes the
critical data points.
CAUTION
Exceeding absolute maximum operating conditions may cause damage to the device.
Table 3-1. PGA2505EVMV2 Absolute Maximum Ratings
Description Rating
Power-supply voltages
VA+ +5.5 VDC maximum
VA– –5.5 VDC maximum
VCOM –0.3 VDC minimum to (VA+) +0.3 VDC maximum
VCC +5.5 VDC maximum
Phantom power +50 VDC maximum
Microphone input (J3), XLR, or TRS maximum input voltage, differential 20 VPP (or 7 V RMS) maximum
Preamplifier output (J6) maximum output voltage, differential 17.5 VPP (or 6.2 V RMS) maximum
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4 Setup Guide
This section provides descriptions of the hardware components that make up the PGA2505EVMV2. In addition,
configuration information for power supplies, analog input and output connections, switches, and jumpers are
provided.
4.1 Analog and Digital Power Supplies
All analog and digital power supplies are connected through terminal block J2, as shown in Figure 4-1.
Recommended power-supply connections are as follows:
• +VA and –VA are +5 V and –5 V, respectively
• Connect EGND to earth or chassis ground of the power supply
• Connect GND to common ground
• Leave VCC unconnected if using the MSP-EXP430F5529LP
Figure 4-1. Power Terminal Block J2 Schematic
The PGA2505EVMV2 requires two analog supplies and one digital power supply. The analog supplies are VA+
and VA−, respectively. VA+ is typically set to +5.0 VDC, while VA− is typically set to −5.0 VDC. The analog
supplies power the PGA2505 microphone preamplifier integrated circuit. The digital power supply, VCC, is
unconnected if using the MSP-EXP430F5529LP.
An optional third analog power supply may be used for the PGA2505 common-mode dc voltage input, VCOMIN
(pin 22). VCOMIN allows the PGA2505 output and input to be dc biased to a common-mode voltage between
0 V and 2.5 V, and is connected through terminal block J2. The common-mode voltage biases both the output
and input terminals of the PGA2505, with the output pins biased to the VCOMIN voltage level and the input pins
biased to approximately VCOMIN − 0.65 V.
The GND terminal of connector J2 serves as the common ground connection for both the analog and digital
sections of the PGA2505EVMV2. Connect the EGND (earth ground) terminal to the earth or chassis ground of
the power supply. The common ground (GND) and earth ground (EGND) are connected to one another using a
0.1-µF capacitor (C10).
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4.2 Microphone Input
Dynamic and condenser microphones or audio test equipment are connected to the PGA2505EVMV2 input
through combo connector J3. The combo connector combines both a 3-pin female XLR and a 1/4-inch TRS jack
for connecting to microphones and test signal sources. Both the XLR and TRS jacks are wired for a balanced
input. Figure 4-2 illustrates the combo connector pin configuration for the PGA2505EVMV2.
Hot (+), to VIN+
Cold (–), to VIN–
Shield, to EGND
R
T
S
Hot (+), to VIN+
Cold (–), to VIN–
Shield, to EGND
Figure 4-2. Microphone Input Connector Configuration
4.3 Phantom Power Connections
The PGA2505EVMV2 supports connection of a phantom power source across the inputs of the preamplifier
using terminal block J1. The voltage source is connected to the hot (+) and cold (−) sides of the preamplifier
input through 6.81-kΩ resistors. Phantom power may be operated at voltages up to 50 VDC.
Phantom power is required for condenser microphones. When using a condenser microphone requiring a
phantom power source, short pins 1 and 2 of jumper JMP1, and leave pins 3 and 4 open.
CAUTION
Be aware that when using a phantom power source, connect the microphone and cable before
turning on phantom power. Make sure to turn off phantom power before disconnecting the
microphone or cable. Making or breaking the input connection with 48 V may cause large transient
spikes that could damage the PGA2505 or anything connected to the output.
In addition, When using a dynamic microphone, short pins 3 and 4 of jumper J3, and leave pins 1 and 2 open.
4.4 DC Blocking Capacitors
Capacitors C4 and C9 are used as dc blocking capacitors. They provide ac coupling to the microphone input,
as well as block the phantom voltage from reaching the PGA2505 input terminals when using a condenser
microphone. The blocking capacitors are selected to not degrade the dynamic performance of the PGA2505.
The capacitors shown in the bill of materials (see Table 6-1) are installed by default at the factory. If using an
alternative capacitor, use components rated for 50 V minimum, with 63 V or greater recommended for long-term
reliability.
4.5 Protection Network
Resistors R4 and R14, along with Schottky diodes D5, D6, D7 and D9, provide input protection for the PGA2505
preamplifier when using phantom power, or when the input voltage exceeds the VA+ or VA− power supplies by
more than 350 mV (the approximate turn-on voltage of the Schottky diodes).
A common fault condition is for either the hot (+) or cold (−) input of the preamplifier to be shorted to ground.
With phantom voltage applied, this causes the blocking capacitors to discharge, with a large surge current
presented at the PGA2505 input pins. Without the protection network, the PGA2505 can be permanently
damaged by the surge current, which can reach several amperes in peak magnitude.
The Schottky diodes are forced into conduction during this fault condition, steering most of the charge away from
the PGA2505 device and towards the power supplies. The series resistors can be set to a value that helps limit
the input current; however, take care to avoid adding too much resistance because the added noise can degrade
the overall performance of the preamplifier. The Schottky diodes add a nonlinear capacitance to the input circuit,
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which can result in additional distortion. However, with the relatively small input voltage swing present when
the preamplifier is set to gains between 9 dB and 60 dB, the effect on the THD+N of the PGA2505 is small
or negligible. For unity-gain applications, where the voltage swing may become large enough in magnitude to
transition over a greater portion of the diodes nonlinear capacitance, the THD+N ratio may degrade by as much
as 3 dB from the published typical performance specifications.
4.6 Configurable Input Circuitry
The configurable portion of the input circuit includes R5, R6, R8, R13, R15, R16, Cc1, and Cc2. These
components support prototyping of additional circuitry, such as pads and filters. During assembly at the factory,
resistors R8 and R13 are not installed, while R5, R6, R15, R16, Cc1, and Cc2 are replaced by 0-Ω shunt
resistors.
4.7 Configurable Output Circuitry and Preamp Output Connector
The configurable portion of the output circuit includes R17, R18, R19, R20, R21, C13, C14, and C15. These
components support prototyping of additional circuitry, such as pads and filters, as well as emulation of various
loading conditions. During assembly at the factory, resistors R18 and R19 are replaced by 0-Ω shunt resistors.
Resistors R17, R20, and R21, as well as capacitors C13 through C15, are not installed. The differential
preamplifier output is provided at J4, a 3-pin male XLR connector, or at J6, a 1/4-inch TRS connector.
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5 Software Operation
This section provides instructions for using the PGA2505EVMV2 application software and using the software to
control the PGA2505 gain and support functions.
5.1 Applications Software Overview
The applications software supplied with the PGA2505EVMV2 allows the user to control the board using an
online GUI, found here. All programmable functions are supported.
5.2 Using the GUI
The following steps describe how to connect the EVM boards to a computer:
1. Connect the MSP-EXP430F5529LP to the PGA2505EVMV2 board.
2. Connect the micro USB end of the provided USB cable into the MSP430 board, and the other end of the
USB cable into an open USB port on the computer.
3. Launch the GUI to automatically flash the microcontroller and adjust all programmable functions. Successful
flash can be visually confirmed by the GPO LEDs flashing in sequence.
4. Manually set the COM port in the GUI composer to the COM port titled Microsoft after the successful flash by
clicking File → Options → Serial Port.
When successfully connected to the microcontroller through the serial COM port, the MSP430 acknowledges
successful GUI control actions by printing to the textbox shown in Figure 5-1.
GUI supports up to 8
PGAs with serial data
ports connected in series
When EVM is successfully
connected to MSP430 via
serial COM port, MSP430
will acknowledge successful
GUI control actions by
printing to this textbox
Figure 5-1. PGA2505EVMV2 GUI With Programmable Functions
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6 Schematic, PCB Layout, and Bill of Materials
This section provides the electrical schematic and physical PCB layout information for the PGA2505EVMV2. The bill of materials is included for
component reference.
6.1 Schematic
The complete electrical schematic for the PGA2505EVMV2 is shown in Figure 6-1. See the bill of materials in Table 6-1 for descriptions of components
shown in the schematic.
Figure 6-1. PGA2505EVMV2 Schematic
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6.2 PCB Layout
The PGA2505EVMV2 is a four-layer printed circuit board using both through-hole and surface-mount
components.
Figure 6-2. PGA2505EVMV2 Top Overlay
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Figure 6-3. PGA2505EVMV2 Top Layer
Figure 6-4. PGA2505EVMV2 Bottom Layer
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6.3 Bill of Materials
Table 6-1 lists the complete bill of materials for the PGA2505EVMV2. Data for each component is available from the corresponding manufacturer’s web
site.
Table 6-1. PGA2505EVMV2 BOM
Designator Quantity Value Description Package Reference Part Number Manufacturer
!PCB1 1 Printed Circuit Board AMPS138 Any
C1, C2, C11, C23 4 4.7uF CAP, TA, 4.7 uF, 16 V, +/- 10%, 4 ohm, SMD 3216-18 TAJA475K016RNJ AVX
C3 1 0.1uF CAP, CERM, 0.1 uF, 100 V, +/- 10%, X7R, 0805 0805 C0805C104K1RACTU Kemet
C4, C9 2 47uF CAP, AL, 47 µF, 63 V, +/- 20%, 1 ohm, AEC-Q200
Grade 1, SMD
D8xL10.2mm EEETG1J470UP Panasonic
C5, C6, C8 3 1000pF CAP, CERM, 1000 pF, 50 V, +/- 5%, C0G/NP0,
0805
0805 C0805C102J5GACTU Kemet
C7, C12, C18, C19, C20, C21,
C22, C24
8 0.1uF CAP, CERM, 0.1 uF, 50 V, +/- 10%, X7R, 0805 0805 C0805C104K5RACTU Kemet
C10 1 0.01uF CAP, CERM, 0.01 uF, 100 V, +/- 10%, X7R, 0805 0805 08051C103KAT2A AVX
C16, C17 2 1uF CAP, CERM, 1 uF, 16 V, +/- 10%, X7R, 0805 0805 C0805C105K4RACTU Kemet
Cc1, Cc2, R5, R6, R15, R16,
R18, R19
8 0 RES, 0, 0%, W, AEC-Q200 Grade 0, 0805 0805 PMR10EZPJ000 Rohm
D1, D3, D8 3 Zener Diode 5.6V 250mW ±4% Surface Mount
TO-236AB
SOT23-3 PLVA656A,215 Nexperia
D2, D4 2 Green LED, Green, SMD LED_0603 LTST-C191TGKT Lite-On
D5, D6, D7, D9 4 20V Diode, Schottky, 20 V, 1 A, SOD-323 SOD-323 CUS10S30,H3F Toshiba
D10, D11, D12, D13, D14 5 Red LED, Red, SMD LED_0603 150060RS75000 Wurth Elektronik
D15 1 51V Diode, TVS, Uni, 51 V, 82.4 Vc, 400 W, 4.9 A, SMA SMA SMAJ51A Littelfuse
H1, H2, H3, H4 4 Machine Screw, Round, #4-40 x 1/4, Nylon, Philips
panhead
Screw NY PMS 440 0025 PH B&F Fastener Supply
H5, H6, H7, H8 4 Standoff, Hex, 0.5"L #4-40 Nylon Standoff 1902C Keystone
J1 1 Terminal Block, 3.5mm, 2x1, Tin, TH Terminal Block, 3.5mm, 2x1,
TH
1776275-2 TE Connectivity
J2 1 Terminal Block, 3.5mm, 6x1, Tin, TH Terminal Block, 3.5mm, 6x1,
TH
0393570006 Molex
J3 1 XLR Receptacle and 1/4" Phone Jack, 8-Pin, TH TH, 8-Leads, Body 27x37mm NCJ6FI-H Neutrik
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Table 6-1. PGA2505EVMV2 BOM (continued)
Designator Quantity Value Description Package Reference Part Number Manufacturer
J4 1 Receptacle, Male, 3 Position, R/A, TH Receptacle, Male, 3 Position,
R/A, TH
PQG3MRA112 Switchcraft
J5, J7 2 Receptacle, 2.54mm, 10x2, Tin, TH 10x2 Receptacle SSQ-110-03-T-D Samtec
J6 1 Phone Jack, 1/4 inch, TH NRJ3HF-1 Neutrik
R1, R2, R24, R29, R30, R36,
R37
7 4.02k RES, 4.02 k, 0.1%, 0.125 W, 0805 0805 RG2012P-4021-B-T5 Susumu Co Ltd
R3 1 100k RES, 100 k, 0.1%, 0.125 W, 0805 0805 RG2012P-104-B-T5 Susumu Co Ltd
R4, R14, R31 3 10.0 RES, 10.0, 0.1%, 0.2 W, AEC-Q200 Grade 0, 0805 0805 PATT0805E10R0BGT1 Vishay Thin Film
R7, R12 2 6.81 kOhms ±0.1% 0.4W, 2/5W Chip Resistor 1206
(3216 Metric) Anti-Sulfur, Automotive AEC-Q200,
Moisture Resistant Thin Film
1206 TNPW12066K81BEEN Vishay Dale
R9 1 10.0k RES, 10.0 k, 0.1%, 0.125 W, 0805 0805 RT0805BRD0710KL Yageo America
R10 1 1.00Meg RES, 1.00 M, 1%, 0.125 W, AEC-Q200 Grade 0,
0805
0805 CRCW08051M00FKEA Vishay-Dale
R22, R23, R38, R39 4 49.9 RES, 49.9, 0.1%, 0.125 W, 0805 0805 RT0805BRD0749R9L Yageo America
TP1, TP2, TP3, TP4, TP5,
TP6, TP7, TP8, TP9, TP10,
TP11, TP12, TP13, TP14,
TP15, TP16, TP17, TP18,
TP19, TP20, TP21
21 Test Point, Miniature, SMT Testpoint_Keystone_Miniature 5015 Keystone
U1 1 Gain Range: 0 dB, and 9 dB to 60 dB, in 3 dB
Steps, -40 to 85 degC, 24-pin SOP (DB24), Green
(RoHS & no Sb/Br)
DB0024A PGA2505IDB Texas Instruments
U2 1 Single Power Supply BUFFER Logic Level Shifter
(no enable), DCK0005A (SOT-SC70-5)
DCK0005A SDO Level Shifter Texas Instruments
C13, C14, C15 0 0.1uF CAP, CERM, 0.1 uF, 50 V, +/- 10%, X7R, 0805 0805 C0805C104K5RACTU Kemet
FID1, FID2, FID3 0 Fiducial mark. There is nothing to buy or mount. N/A N/A N/A
R8, R11, R13, R17, R20, R21 0 0 RES, 0, 0%, W, AEC-Q200 Grade 0, 0805 0805 PMR10EZPJ000 Rohm
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PGA2505EVMV2 Evaluation Module 17
Copyright © 2021 Texas Instruments Incorporated

STANDARD TERMS FOR EVALUATION MODULES
1. Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, and/or
documentation which may be provided together or separately (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance
with the terms set forth herein. User's acceptance of the EVM is expressly subject to the following terms.
1.1 EVMs are intended solely for product or software developers for use in a research and development setting to facilitate feasibility
evaluation, experimentation, or scientific analysis of TI semiconductors products. EVMs have no direct function and are not
finished products. EVMs shall not be directly or indirectly assembled as a part or subassembly in any finished product. For
clarification, any software or software tools provided with the EVM (“Software”) shall not be subject to the terms and conditions
set forth herein but rather shall be subject to the applicable terms that accompany such Software
1.2 EVMs are not intended for consumer or household use. EVMs may not be sold, sublicensed, leased, rented, loaned, assigned,
or otherwise distributed for commercial purposes by Users, in whole or in part, or used in any finished product or production
system.
2Limited Warranty and Related Remedies/Disclaimers:
2.1 These terms do not apply to Software. The warranty, if any, for Software is covered in the applicable Software License
Agreement.
2.2 TI warrants that the TI EVM will conform to TI's published specifications for ninety (90) days after the date TI delivers such EVM
to User. Notwithstanding the foregoing, TI shall not be liable for a nonconforming EVM if (a) the nonconformity was caused by
neglect, misuse or mistreatment by an entity other than TI, including improper installation or testing, or for any EVMs that have
been altered or modified in any way by an entity other than TI, (b) the nonconformity resulted from User's design, specifications
or instructions for such EVMs or improper system design, or (c) User has not paid on time. Testing and other quality control
techniques are used to the extent TI deems necessary. TI does not test all parameters of each EVM.
User's claims against TI under this Section 2 are void if User fails to notify TI of any apparent defects in the EVMs within ten (10)
business days after delivery, or of any hidden defects with ten (10) business days after the defect has been detected.
2.3 TI's sole liability shall be at its option to repair or replace EVMs that fail to conform to the warranty set forth above, or credit
User's account for such EVM. TI's liability under this warranty shall be limited to EVMs that are returned during the warranty
period to the address designated by TI and that are determined by TI not to conform to such warranty. If TI elects to repair or
replace such EVM, TI shall have a reasonable time to repair such EVM or provide replacements. Repaired EVMs shall be
warranted for the remainder of the original warranty period. Replaced EVMs shall be warranted for a new full ninety (90) day
warranty period.
WARNING
Evaluation Kits are intended solely for use by technically qualified,
professional electronics experts who are familiar with the dangers
and application risks associated with handling electrical mechanical
components, systems, and subsystems.
User shall operate the Evaluation Kit within TI’s recommended
guidelines and any applicable legal or environmental requirements
as well as reasonable and customary safeguards. Failure to set up
and/or operate the Evaluation Kit within TI’s recommended
guidelines may result in personal injury or death or property
damage. Proper set up entails following TI’s instructions for
electrical ratings of interface circuits such as input, output and
electrical loads.
NOTE:
EXPOSURE TO ELECTROSTATIC DISCHARGE (ESD) MAY CAUSE DEGREDATION OR FAILURE OF THE EVALUATION
KIT; TI RECOMMENDS STORAGE OF THE EVALUATION KIT IN A PROTECTIVE ESD BAG.

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2
3Regulatory Notices:
3.1 United States
3.1.1 Notice applicable to EVMs not FCC-Approved:
FCC NOTICE: This kit is designed to allow product developers to evaluate electronic components, circuitry, or software
associated with the kit to determine whether to incorporate such items in a finished product and software developers to write
software applications for use with the end product. This kit is not a finished product and when assembled may not be resold or
otherwise marketed unless all required FCC equipment authorizations are first obtained. Operation is subject to the condition
that this product not cause harmful interference to licensed radio stations and that this product accept harmful interference.
Unless the assembled kit is designed to operate under part 15, part 18 or part 95 of this chapter, the operator of the kit must
operate under the authority of an FCC license holder or must secure an experimental authorization under part 5 of this chapter.
3.1.2 For EVMs annotated as FCC – FEDERAL COMMUNICATIONS COMMISSION Part 15 Compliant:
CAUTION
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not
cause harmful interference, and (2) this device must accept any interference received, including interference that may cause
undesired operation.
Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to
operate the equipment.
FCC Interference Statement for Class A EVM devices
NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of
the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is
operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to
correct the interference at his own expense.
FCC Interference Statement for Class B EVM devices
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of
the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance
with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference
will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more
of the following measures:
•Reorient or relocate the receiving antenna.
•Increase the separation between the equipment and receiver.
•Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
•Consult the dealer or an experienced radio/TV technician for help.
3.2 Canada
3.2.1 For EVMs issued with an Industry Canada Certificate of Conformance to RSS-210 or RSS-247
Concerning EVMs Including Radio Transmitters:
This device complies with Industry Canada license-exempt RSSs. Operation is subject to the following two conditions:
(1) this device may not cause interference, and (2) this device must accept any interference, including interference that may
cause undesired operation of the device.
Concernant les EVMs avec appareils radio:
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation
est autorisée aux deux conditions suivantes: (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit
accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.
Concerning EVMs Including Detachable Antennas:
Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser)
gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type
and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for
successful communication. This radio transmitter has been approved by Industry Canada to operate with the antenna types
listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated.
Antenna types not included in this list, having a gain greater than the maximum gain indicated for that type, are strictly prohibited
for use with this device.

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Concernant les EVMs avec antennes détachables
Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et
d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage
radioélectrique à l'intention des autres utilisateurs, il faut choisir le type d'antenne et son gain de sorte que la puissance isotrope
rayonnée équivalente (p.i.r.e.) ne dépasse pas l'intensité nécessaire à l'établissement d'une communication satisfaisante. Le
présent émetteur radio a été approuvé par Industrie Canada pour fonctionner avec les types d'antenne énumérés dans le
manuel d’usage et ayant un gain admissible maximal et l'impédance requise pour chaque type d'antenne. Les types d'antenne
non inclus dans cette liste, ou dont le gain est supérieur au gain maximal indiqué, sont strictement interdits pour l'exploitation de
l'émetteur
3.3 Japan
3.3.1 Notice for EVMs delivered in Japan: Please see http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_01.page 日本国内に
輸入される評価用キット、ボードについては、次のところをご覧ください。
http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_01.page
3.3.2 Notice for Users of EVMs Considered “Radio Frequency Products” in Japan: EVMs entering Japan may not be certified
by TI as conforming to Technical Regulations of Radio Law of Japan.
If User uses EVMs in Japan, not certified to Technical Regulations of Radio Law of Japan, User is required to follow the
instructions set forth by Radio Law of Japan, which includes, but is not limited to, the instructions below with respect to EVMs
(which for the avoidance of doubt are stated strictly for convenience and should be verified by User):
1. Use EVMs in a shielded room or any other test facility as defined in the notification #173 issued by Ministry of Internal
Affairs and Communications on March 28, 2006, based on Sub-section 1.1 of Article 6 of the Ministry’s Rule for
Enforcement of Radio Law of Japan,
2. Use EVMs only after User obtains the license of Test Radio Station as provided in Radio Law of Japan with respect to
EVMs, or
3. Use of EVMs only after User obtains the Technical Regulations Conformity Certification as provided in Radio Law of Japan
with respect to EVMs. Also, do not transfer EVMs, unless User gives the same notice above to the transferee. Please note
that if User does not follow the instructions above, User will be subject to penalties of Radio Law of Japan.
【無線電波を送信する製品の開発キットをお使いになる際の注意事項】 開発キットの中には技術基準適合証明を受けて
いないものがあります。 技術適合証明を受けていないもののご使用に際しては、電波法遵守のため、以下のいずれかの
措置を取っていただく必要がありますのでご注意ください。
1. 電波法施行規則第6条第1項第1号に基づく平成18年3月28日総務省告示第173号で定められた電波暗室等の試験設備でご使用
いただく。
2. 実験局の免許を取得後ご使用いただく。
3. 技術基準適合証明を取得後ご使用いただく。
なお、本製品は、上記の「ご使用にあたっての注意」を譲渡先、移転先に通知しない限り、譲渡、移転できないものとします。
上記を遵守頂けない場合は、電波法の罰則が適用される可能性があることをご留意ください。 日本テキサス・イ
ンスツルメンツ株式会社
東京都新宿区西新宿６丁目２４番１号
西新宿三井ビル
3.3.3 Notice for EVMs for Power Line Communication: Please see http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page
電力線搬送波通信についての開発キットをお使いになる際の注意事項については、次のところをご覧ください。http:/
/www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page
3.4 European Union
3.4.1 For EVMs subject to EU Directive 2014/30/EU (Electromagnetic Compatibility Directive):
This is a class A product intended for use in environments other than domestic environments that are connected to a
low-voltage power-supply network that supplies buildings used for domestic purposes. In a domestic environment this
product may cause radio interference in which case the user may be required to take adequate measures.