Texas Instruments BoosterPack BOOSTXL-ADS7841-Q1 User manual

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BOOSTXL-ADS7841-Q1 BoosterPack™ User's Guide
User's Guide
SNAU229–December 2017
BOOSTXL-ADS7841-Q1 BoosterPack™ User's Guide
The ADS7841-Q1 BoosterPack™ (BOOSTXL-ADS7841-Q1) allows users to evaluate the functionality of
Texas Instruments' ADS7841-Q1 SAR ADC. The ADS7841-Q1 is a 12-bit, 4-channel, automotive qualified
SAR ADC. This user’s guide describes both the hardware platform with an ADS7841-Q1 device, and the
graphical user interface (GUI) software used to configure the various modes of operation of this device.
Contents
1 Introduction ................................................................................................................... 2
2 BOOSTXL-ADS7841-Q1 EVM Overview................................................................................. 4
3 BOOSTXL-ADS7841-Q1EVM EVM Setup ............................................................................... 6
4 BOOSTXL-ADS7841-Q1 EVM GUI Operation ......................................................................... 14
5 Bill of Materials, Printed-Circuit Board Layout, and Schematics..................................................... 19
List of Figures
1 BOOSTXL-ADS7841-Q1 EVM Block Diagram .......................................................................... 3
2 BOOSTXL-ADS7841-Q1EVM Top Level Overview..................................................................... 4
3 BOOSTXL-ADS7841-Q1 EVM GUI Installation.......................................................................... 6
4 BOOSTXL-ADS7841-Q1 EVM Driver Installation ....................................................................... 7
5 TM4C1294 LaunchPad™ Stellaris Virtual Serial Port and ICDI Driver............................................... 8
6 TM4C1294 LaunchPad™ Software Programming Setup .............................................................. 9
7 TM4C1294 LaunchPad™ selection in Configuration Tab............................................................. 10
8 TM4C1294 LaunchPad™ Programming Using LM Flash Programmer............................................. 11
9 TMC1294 LaunchPad™ VIA BoosterPack Driver ..................................................................... 12
10 BOOSTXL-ADS7841-Q1EVM stacked on TM4C1294 LaunchPad™ .............................................. 13
11 ADS7841-Q1EVM GUI Landing Page................................................................................... 14
12 AIN0 (Channel0) Voltage.................................................................................................. 15
13 AIN3 (Channel3) Voltage.................................................................................................. 16
14 Frequency Domain Analysis Page....................................................................................... 17
15 BOOSTXL-ADS7841-Q1 Top Layer Routing........................................................................... 20
16 BOOSTXL-ADS7841-Q1 Ground Layer................................................................................. 21
17 BOOSTXL-ADS7841-Q1 Power Layer.................................................................................. 22
18 BOOSTXL-ADS7841-Q1 Bottom Layer Routing....................................................................... 23
19 BOOSTXL-ADS7841-Q1 EVM Schematic Diagram................................................................... 24
List of Tables
1 Input Connector and Channel Configuration............................................................................. 4
2 Bill of Materials ............................................................................................................. 19
Trademarks
BoosterPack, LaunchPad, TM4C1294 LaunchPad are trademarks of Texas Instruments.

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BOOSTXL-ADS7841-Q1 BoosterPack™ User's Guide
1 Introduction
The BOOSTXL-ADS7841-Q1 BoosterPack™ is a fully-assembled evaluation platform designed to
highlight the ADS7841-Q1 device features and its various modes of operations.
The BOOSTXL-ADS7841-Q1 EVM interfaces to the TM4C1294 LaunchPad™ Development Kit (EK-
TM4C1294XL). The Tiva C Series TM4C1294 MCU on the TM4C1294 LaunchPad™ communicates with
the ADS7841-Q1 through its SPI interface and acts as a USB-to-PC GUI communication bridge.
NOTE: The BOOSTXL-ADS7841-Q1 requires an external master controller to evaluate the
ADS7841-Q1.
The TM4C1294 LaunchPad™ is controlled by commands received from the BOOSTXL-ADS7841-Q1 EVM
GUI, and returns data to the GUI for display and analysis. If the TM4C1294 LaunchPad™ is not used, the
BoosterPack plug-in module format of the BOOSTXL-ADS7841-Q1 board allows an alternative external
host to communicate with the ADS7841-Q1.
The BOOSTXL-ADS7841-Q1 EVM incorporates all required circuitry and components with the following
features:
• ADS7841-Q1 12-bit, 4-channel, automotive qualified SAR ADC with SPI interface
• Optional low power voltage reference, TI’s REF5045A, to generate a 4.5-V reference for the ADS7841-
Q1 VREF pin when using 5.0 V from TM4C1294 LaunchPad™
• Optional precision, low noise, dual operational amplifier, TI's OPA2320, to generate buffered input for
the ADS7841-Q1 AIN0 and AIN2 pins
• Optional adjustable linear regulator, TI’s TPS79901, to generate stable 5V output voltage to power the
ADS7841-Q1 VCC pin when using the USB power from the TM4C1294 LaunchPad™
• SPI interface for communication and configuration of modes available on the ADS7841-Q1
Figure 1 shows the BOOSTXL-ADS7841-Q1 EVM architecture, identifying the key components and blocks
previously listed.

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Figure 1. BOOSTXL-ADS7841-Q1 EVM Block Diagram

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2 BOOSTXL-ADS7841-Q1 EVM Overview
Section 2 describes various onboard components that are used to interface analog input, digital interface,
and provide power supply to BOOSTXL-ADS7841-Q1 EVM. Figure 2 shows a BOOSTXL-ADS7841-Q1
EVM overview.
Figure 2. BOOSTXL-ADS7841-Q1EVM Top Level Overview
2.1 Connectors for Analog Input
The BOOSTXL-ADS7841-Q1 EVM is designed for easy interface to analog sources through a 100-mil
header. Connector J10 allows analog source connectivity. Table 1 lists the analog input connector and
input channel configuration.
Table 1. Input Connector and Channel Configuration
J10 Connector Pin Description
J10:1 Single-ended analog input for channel 0 of ADC
J10:2 Single-ended analog input for channel 1 of ADC
J10:3 Single-ended analog input for channel 2 of ADC
J10:4 Single-ended analog input for channel 3 of ADC
J10:1 - J10:2 Pseudo-Differential analog input for channel 0 - channel 1 of ADC
J10:2 - J10:1 Pseudo-Differential analog input for channel 1 - channel 0 of ADC
J10:3 - J10:4 Pseudo-Differential analog input for channel 2 - channel 3 of ADC
J10:4 - J10:3 Pseudo-Differential analog input for channel 3 - channel 2 of ADC
J10:5 and J10:6 BoosterPack ground

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The analog input range is from GND to +VREF when configured as single-ended inputs. A maximum of
four single-ended inputs may be applied to J10, using pins J10:1 to J10:4. When configured for differential
mode operation, the positive analog input level has a range of -0.2V to VCC + 0.2V. The voltage on the
negative analog input is limited between -0.2V and 1.25V. A maximum of two pseudo-differential inputs
may be applied to J10, using pins J10:1 - J10:2, and J10:3 - J10:4.
The input to channel 0 can be optionally configured to use the OPA2320 buffer through 100ohm resistor
with an 560pF capacitor to GND. Jumper J8 can be placed on pins 1-2 to select this unity gain buffer
configuration of the OPA2320 and in this case channel 0 input is provided via SMA connector J7. A similar
configuration is available for channel 2 input as well by using Jumper J12 pins 1-2 and via SMA connector
J11.
By default, AIN3 is factory configured by Jumper J15 pins 1-2 and J15 pins 3-4 on the BOOSTXL-
ADS7841-Q1 EVM to measure a fraction of the 5V supply voltage using simple resistor divider circuit
formed by R35/R36 (see schematic in Figure 19 ). Please ensure Jumper J15 shunts are disconnected
when using J10.3 as AIN3 input.
2.2 Voltage Reference
The BOOSTXL-ADS7841-Q1 EVM has two sources for the reference voltage. Jumper J13 can select the
VREF voltage from either the REF5045A (U9) or from 5V VCC. The EVM is factory configured for use with
the REF5045A 4.5V reference (J13 pins 2-3).
2.3 Digital Interface
As noted in Section 1, the BOOSTXL-ADS7841-Q1 EVM interfaces with the TM4C1294 LaunchPad™,
which in turn communicates with the computer over USB. The two devices on the booster pack that the
TM4C1294 communicates with are the ADS7841-Q1 ADC (over SPI) and the EEPROM (over I2C). The
EEPROM comes preprogrammed with the information required to configure and initialize the BOOSTXL-
ADS7841-Q1 EVM platform every time on power up.
2.4 ADS7841-Q1EVM Digital I/O Interface
The BOOSTXL-ADS7841-Q1 EVM supports the SPI digital interface and functional modes as detailed in
the ADS7841-Q1EVM device data sheet (SBAS469). The TM4C1294 LaunchPad™ is operating at a 3.3-V
logic level and is connected to the 5.0-V digital I/O lines of the ADC through level shifter
(SN74LVC2T45QDCURQ1).
2.5 Power Supplies
The device supports a single supply with a wide range of operation. The VCC can operate from 2.7 V to
5.0 V. TI’s TPS79901 adjustable voltage regulator available onboard is configured to supply 5.0 V to
ADS7841-Q1 VCC pin on the BOOSTXL-ADS7841-Q1 EVM.

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3 BOOSTXL-ADS7841-Q1EVM EVM Setup
3.1 BOOSTXL-ADS7841-Q1 EVM Graphical User Interface Software Installation
The following steps describe the BOOSTXL-ADS7841-Q1 EVM GUI software installation:
1. Download the latest version of the EVM graphical user interface (GUI) installer from the Tools and
Software folder of the device, and run the GUI installer to install the EVM GUI software on your
windows PC.
2. Accept the License Agreements and follow the on-screen instructions to complete the installation (see
Figure 3).
Figure 3. BOOSTXL-ADS7841-Q1 EVM GUI Installation

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3. As a part of the BOOSTXL-ADS7841-Q1 EVM GUI installation, a prompt with a Device Driver
Installation Wizard appears on the screen (see Figure 4). Click the Next button to proceed, then click
the Finish button when the installation is complete.
Figure 4. BOOSTXL-ADS7841-Q1 EVM Driver Installation

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4. Open the computer's "Device Manager". You must be able to see the "Stellaris Virtual Serial Port" and
"Stellaris In-Circuit Debug Interface" as shown in Figure 5.
Figure 5. TM4C1294 LaunchPad™ Stellaris Virtual Serial Port and ICDI Driver

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3.2 LM Flash Programmer for TM4C1294 LaunchPad™ Software Programming
The TM4C1294 LaunchPad™ ships with a default firmware program flashed on its memory. When a
TM4C1294 LaunchPad™ is connected to the PC for the first time, its firmware needs to be updated for
communications with the BOOSTXL-ADS7841-Q1 EVM. The following steps describe the programming of
this firmware on the flash memory:
1. Download the latest version of LM Flash Programmer. The LM Flash Programmer is also included as
part of the BOOSTXL-ADS7841-Q1 EVM GUI installation in the following folder: C:\Program Files
(x86)\Texas Instruments\ADS7841\Firmware
2. Make sure the power select JP1 jumper on the TM4C1294 LaunchPad™ is on ICDI. Connect the
Debug USB port on the TM4C1294 LaunchPad™ to the PC with a micro USB cable as shown in
Figure 6. This must light the green power LED D0 on the TM4C1294 LaunchPad™.
Figure 6. TM4C1294 LaunchPad™ Software Programming Setup

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3. Launch the LM Flash Programmer. In the Configuration tab select TM4C1294XL LaunchPad from the
drop-down menu as shown in Figure 7.
Figure 7. TM4C1294 LaunchPad™ selection in Configuration Tab

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4. From the Program tab, program the TM4C1294 with the BOOSTXL-ADS7841-Q1 EVM firmware as
shown in Figure 8.
Figure 8. TM4C1294 LaunchPad™ Programming Using LM Flash Programmer
5. After programming and verification is successful, disconnect the micro USB cable from the TM4C1294
LaunchPad™ debug port. Switch the power select JP1 jumper position from ICDI to the OTG location.

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3.3 BOOSTXL-ADC7841-Q1 EVM Stack Up
Following are the instructions to set up the BOOSTXL-ADS7841-Q1EVM for evaluation:
1. Stack the BOOSTXL-ADS7841-Q1 EVM on the TM4C1294 LaunchPad™. Make sure the 20-pin
connector (J1, J3) on BOOSTXL-ADS7841-Q1 EVM is mapped against connector X6 and connector
(J4, J2) on BOOSTXL-ADS7841-Q1EVM is mapped against connector X7 on the TM4C1294
LaunchPad™. Pin 1 of BOOSTXL-ADS7841-Q1EVM must align with pin 1 of connector X6 on the
TM4C1294 LaunchPad™.
2. Position the power select JP1 jumper on the TM4C1294 LaunchPad™ on pins corresponding to OTG.
3. Connect using the micro USB cable, the TM4C1294 LaunchPad™ USB port U7 to the PC. This must
light the green power LED D0 on the TM4C1294 LaunchPad™
4. Open computer's "Device Manager". You must see under ports “VIA USB BoosterPack” and “VIA USB
BoosterPack Console” as shown in Figure 9
Figure 9. TMC1294 LaunchPad™ VIA BoosterPack Driver

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5. Figure 10 shows the assembled BOOSTXL-ADS7841-Q1EVM and TM4C1294 LaunchPad™
configuration.
Figure 10. BOOSTXL-ADS7841-Q1EVM stacked on TM4C1294 LaunchPad™

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4 BOOSTXL-ADS7841-Q1 EVM GUI Operation
4.1 Description
Figure 11 shows the landing page of the BOOSTXL-ADS7841-Q1 EVM GUI. This page provides a high-
level overview of the ADS7841-Q1 device. The left corner shows the tabs required to navigate to the
BOOSTXL-ADS7841-Q1 EVM GUI Home and Analysis pages. When the TM4C1294 LaunchPad™ with
the BOOSTXL-ADS7841-Q1 EVM stacked is connected to the PC with the micro USB cable, the GUI
detects the BoosterPack™ by reading the onboard EEPROM. Once detected and connected, the GUI
indicates this status at the bottom left corner of the GUI.
Figure 11. ADS7841-Q1EVM GUI Landing Page

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4.2 Time Domain Analysis
Go to Analysis page, and select the Time Domain Analysis. Time Domain Analysis displays the acquired
data versus time for the selected channel as shown in Figure 12. Note default reference voltage for ADC
measurement REF Volt (V) is set as 4.5V.
4.2.1 Measure AIN0 (Channel0) Voltage
This section describes the steps involved in selecting and measuring AIN0 (Channel0) voltage:
1. Make sure following shunt is in place on the BOOSTXL-ADS7841-Q1 EVM: J13 between 2 and 3
(select VREF = 4.5V)
2. Connect J10.1 to J1.1 (3.3V) by a jumper wire.
3. Select "Samples" as 4096, set "SCLK" as 1000 (KHz), and set "Sample Rate" as 10 (KHz).
4. Make sure "Selected Channel" is Channel0, "Single/Diff" is selected as Single, and "Power Down" is
Always On as shown in Figure 12 below.
5. Press “Collect”.
6. Min Code, Max Code, Min Volt (V), Max Volt (V) read out are displayed as shown in Figure 12.
Figure 12. AIN0 (Channel0) Voltage

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4.3 Measure AIN3 (Channel3) Voltage
This section describes the steps involved in selecting and measuring AIN3 (Channel3) voltage. By default,
AIN3 is configured on the BOOSTXL-ADS7841-Q1 EVM to measure a fraction of the 5V supply voltage
using simple resistor divider circuit formed by R35/R36 (see schematic in Figure 19 ):
1. Make sure following shunts are in place on the BOOSTXL-ADS7841-Q1 EVM: J13 between 2 and 3
(select VREF = 4.5V), J15 between 1 and 2, and J15 between 3 and 4.
2. Select "Samples" as 4096, set "SCLK" as 1000 (KHz), and set "Sample Rate" as 10 (KHz).
3. Make sure "Selected Channel" is Channel3, "Single/Diff" is selected as Single, and "Power Down" is
Always On as shown in Figure 13 below.
4. Press “Collect”.
5. Min Code, Max Code, Min Volt (V), Max Volt (V) read out are displayed as shown in Figure 13.
Figure 13. AIN3 (Channel3) Voltage

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4.4 Frequency Domain Analysis
The Frequency Domain page in the GUI performs the fast fourier transform (FFT) of the captured data,
and displays the resulting frequency domain plots of the selected channel of ADS7841. This page also
calculates key ADC dynamic performance parameters, such as signal-to-noise ratio (SNR), total harmonic
distortion (THD), signal-to-noise and distortion ratio (SINAD), spurious-free dynamic range (SFDR), and
effective number of bits (ENOB). Figure 14 shows the Frequency Domain analysis display for a 2kHz
sinusoidal input generated by PSIEVM.
Figure 14. Frequency Domain Analysis Page

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4.4.1 FFT Analysis Settings and Controls
Sample Rate - This field indicates the sampling frequency of the ADC data (kHz)
Samples - The FFT requires a time domain record with a number of samples that is a power of 2. The
Samples drop-down menu provides a list of values that satisfy this requirement.
Fund Freq (kHz) - This field displays the frequency of the largest amplitude input signal computed from
the FFT data, typically the fundamental frequency.
Window - The window function is a mathematical function that reduces the signal to zero at the end
points of the data block.
In applications where coherent sampling cannot be achieved, a window-weighing function can be applied
to the data to minimize spectral leakage. The following options are available:
• Rectangular
• Hamming
• Hann
• Blackman
• 7-Term Blackman-Harris
For a more thorough discussion of windowing, refer to IEEE1241-2000
HarmonicsThis field sets the number of harmonics that are included in the FFT performance calculations.
4.5 Histogram Analysis
The Histogram Analysis page creates a histogram of the captured channel data and displays it. A
histogram is merely a count of the number of times a code has occurred in a particular data set. The
following parameters of the captured data set are displayed:
• The Std Dev [σ]displays the standard deviation of the data set. This value is equivalent to the RMS
noise of the signal when analyzing a dc data set.
• The Mean displays the average value of the data set.
• The Median displays the median value of the data set.
• The Code Spread displays the peak-to-peak spread of the codes in the data set; for a dc data set, this
range would be the peak-to-peak noise.

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5 Bill of Materials, Printed-Circuit Board Layout, and Schematics
This section contains the BOOSTXL-ADS7841-Q1EVM bill of materials (BOM), printed-circuit board (PCB)
layout, and schematics.
5.1 Bill of Materials
Table 2 lists the bill of materials (BOM) for the BOOSTXL-ADS7841-Q1 EVM.
Table 2. Bill of Materials
Designator Quantity Description Manufacturer Part Number Manufacturer
PCB 1 Printed Circuit Board DC013 Any
C1 1 CAP, CERM, 0.22 µF, 25 V, +/- 5%, X7R, 0603 C0603C224J3RAC7867 Kemet
C2, C4, C5 3 CAP, CERM, 2.2 µF, 16 V, +/- 10%, X7R, 0805 C0805C225K4RACTU Kemet
C3 1 CAP, CERM, 180 pF, 50 V, +/- 1%, C0G/NP0, 0402 04025A181FAT2A AVX
C6 1 CAP, CERM, 10 µF, 16 V, +/- 20%, X5R, 0805 0805YD106MAT2A AVX
C7 1 CAP, CERM, 1 µF, 25 V, +/- 10%, X7R, 0603 C0603C105K3RACTU Kemet
C9, C10, C13, C14,
C20, C21 6 CAP, CERM, 0.01 µF, 16 V, +/- 10%, X7R, 0603 GRM188R71C103KA01D MuRata
C11, C15 2 CAP, CERM, 0.1 µF, 16 V, +/- 10%, X7R, 0603 GRM188R71C104KA01D MuRata
C16 1 CAP, TA, 4.7 µF, 10 V, +/- 10%, 4 ohm, AEC-Q200
Grade 1, SMD F931A475KAA AVX
C17, C23 2 CAP, CERM, 0.1 µF, 25 V, +/- 10%, X5R, 0603 06033D104KAT2A AVX
C19, C29 2 CAP, CERM, 560 pF, 50 V, +/- 5%, C0G/NP0, 0603 C0603C561J5GACTU Kemet
C24, C26, C27 3 CAP, CERM, 1 µF, 50 V, +/- 10%, X5R, 0603 C1608X5R1H105K080AB TDK
C25 1 CAP, CERM, 10 µF, 25 V, +/- 10%, X5R, 0805 C2012X5R1E106K125AB TDK
C30 1 CAP, TA, 10 µF, 10 V, +/- 20%, 3 ohm, SMD TAJA106M010RNJ AVX
J1/J3, J2/J4 2 Receptacle, 2.54mm, 10x2, Tin, TH SSQ-110-03-T-D Samtec
J5, J8, J12 3 Header, 100mil, 2x1, Tin, TH PEC02SAAN Sullins Connector Solutions
J10 1 Header, 100mil, 3x2, Gold, TH TSW-103-07-G-D Samtec
J13 1 Header, 100mil, 3x1, Tin, TH PEC03SAAN Sullins Connector Solutions
J15 1 Header, 100mil, 2x2, Tin, TH PEC02DAAN Sullins Connector Solutions
R1, R3, R5, R6, R7,
R8, R9, R10, R16,
R17, R20, R28,
R31, R32
14 RES, 0, 5%, 0.1 W, 0603 CRCW06030000Z0EA Vishay-Dale
R2 1 RES, 10.0, 1%, 0.1 W, 0603 CRCW060310R0FKEA Vishay-Dale
R4 1 RES, 100 k, 0.1%, 0.063 W, 0402 RG1005P-104-B-T5 Susumu Co Ltd
R11 1 RES, 31.6 k, 1%, 0.063 W, 0402 CRCW040231K6FKED Vishay-Dale
R12, R15, R21 3 RES, 10.0 k, 1%, 0.063 W, 0402 CRCW040210K0FKED Vishay-Dale
R13, R14 2 RES, 1.00 k, 1%, 0.063 W, 0402 MCR01MZPF1001 Rohm
R19, R30 2 RES, 100, 1%, 0.063 W, 0402 CRCW0402100RFKED Vishay-Dale
R22, R33 2 RES, 1.0 M, 5%, 0.063 W, 0402 CRCW04021M00JNED Vishay-Dale
R23, R24, R25, R26 4 RES, 49.9, 1%, 0.063 W, 0402 CRCW040249R9FKED Vishay-Dale
R35 1 RES, 68.1 k, 1%, 0.063 W, 0402 CRCW040268K1FKED Vishay-Dale
R36 1 RES, 100 k, 1%, 0.063 W, 0402 CRCW0402100KFKED Vishay-Dale
SH-J1, SH-J2, SH-
J3 3 Shunt, 100mil, Gold plated, Black 969102-0000-DA 3M
TP4, TP5, TP6, TP7 4 Test Point, Miniature, Black, TH 5001 Keystone
U1 1 5.5 V, Buck-Boost Charge Pump Regulator, 60 mA, 3 to
5.5 V Input, -40 to 85 degC, 6-pin SOT23 (DDC6),
Green (RoHS & no Sb/Br)
REG71055IDDCRQ1 Texas Instruments
U2 1 Single Output High PSRR LDO, 200 mA, Adjustable 1.2
to 6.5 V Output, 2.7 to 6.5 V Input, with Low IQ, 6-pin
SON (DRV), -40 to 125 degC, Green (RoHS & no
Sb/Br)
TPS79901QDRVRQ1 Texas Instruments
U3, U5, U7 3 Automotive Catalog Dual-Bit Dual Supply Transceiver
with Configurable Voltage Translation, DCU0008A
(VSSOP-8)
SN74LVC2T45QDCURQ1 Texas Instruments

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Table 2. Bill of Materials (continued)
Designator Quantity Description Manufacturer Part Number Manufacturer
U4 1 I2C BUS EEPROM (2-Wire), TSSOP-B8 BR24G32FVT-3AGE2 Rohm
U6 1 Automotive, Precision, 20MHz, 0.9pA Ib, RRIO, CMOS
Operational Amplifier, DGK0008A (VSSOP-8) OPA2320AQDGKRQ1 Texas Instruments
U8 1 12-BIT 4-CHANNEL SERIAL-OUTPUT SAMPLING
ANALOG-TO-DIGITAL CONVERTER, DBQ0016A
(SSOP-16)
ADS7841ESQDBQRQ1 Texas Instruments
U9 1 Automotive Catalog, Low Noise, Very Low Drift,
Precision Voltage Reference, -40 to125 degC, 8-pin
SOIC (D), Green (RoHS & no Sb/Br)
REF5045AQDRQ1 Texas Instruments
C8, C12, C18, C22,
C28 0 CAP, CERM, 0.01 µF, 16 V, +/- 10%, X7R, 0603 GRM188R71C103KA01D MuRata
J6, J9, J14 0 Header, 100mil, 2x1, Tin, TH PEC02SAAN Sullins Connector Solutions
J7, J11 0 SMA Straight PCB Socket Die Cast, 50 Ohm, TH 5-1814832-1 TE Connectivity
R18, R29 0 RES, 1.0 k, 5%, 0.063 W, 0402 CRCW04021K00JNED Vishay-Dale
R27, R34 0 RES, 330 k, 5%, 0.063 W, 0402 CRCW0402330KJNED Vishay-Dale
TP1, TP2, TP3,
TP8, TP9, TP10,
TP11, TP12, TP13
0 TEST POINT. No entry in BOM.
5.2 PCB Layout
Figure 15 to Figure 18 show the EVM PCB layout.
Figure 15. BOOSTXL-ADS7841-Q1 Top Layer Routing