Texas Instruments ADS1285EVM-PDK, User Manual, Page: 2 / 40

Table of Contents
1 EVM Overview ......................................................................................................................................................................... 4
1.1 ADS1285EVM-PDK Kit...................................................................................................................................................... 4
2 ADS1285EVM-PDK Quick-Start Guide .................................................................................................................................. 4
3 EVM Analog Interface ............................................................................................................................................................. 6
3.1 ADC Analog Input Signal Path........................................................................................................................................... 6
3.2 ADC Input Clock (CLK) Options......................................................................................................................................... 8
4 Digital Interface ....................................................................................................................................................................... 9
4.1 Connection to the PHI........................................................................................................................................................ 9
4.2 Digital Header.................................................................................................................................................................. 10
5 Power Supplies ..................................................................................................................................................................... 10
6 Digital-to-Analog Converter ................................................................................................................................................. 12
7 ADS1285EVM-PDK Initial Setup .......................................................................................................................................... 13
7.1 Default Jumper Settings................................................................................................................................................... 13
7.2 EVM Graphical User Interface (GUI) Software Installation.............................................................................................. 14
8 ADS1285EVM-PDK Software Reference ............................................................................................................................. 16
8.1 EVM GUI Global Settings for ADC Control...................................................................................................................... 16
8.2 Register Map Configuration Tool...................................................................................................................................... 17
8.3 Time Domain Display Tool................................................................................................................................................ 18
8.4 Spectral Analysis Tool...................................................................................................................................................... 19
8.5 Histogram Tool................................................................................................................................................................. 20
8.6 DAC Configuration Tool.................................................................................................................................................... 20
9 ADS1285EVM-PDK Bill of Materials, PCB Layout, and Schematics ................................................................................ 22
9.1 Bill of Materials................................................................................................................................................................. 22
9.2 PCB Layout...................................................................................................................................................................... 27
9.3 Schematics....................................................................................................................................................................... 28
10 References .......................................................................................................................................................................... 34
11 Revision History .................................................................................................................................................................. 34
List of Figures
Figure 2-1. ADS1285EVM-PDK Hardware Setup and LED Indicators........................................................................................ 4
Figure 2-2. EVM GUI Global Input Parameters........................................................................................................................... 5
Figure 3-1. Input Terminal Blocks and Headers (Schematic)...................................................................................................... 7
Figure 3-2. CLK Source (Schematic)........................................................................................................................................... 8
Figure 5-1. ADS1285EVM-PDK AVDD1, AVDD2, and AVSS+5V Supply Generation (Schematic).......................................... 10
Figure 5-2. ADS1285EVM-PDK Unipolar and Bidirectional Supplies Selection (Schematic).................................................... 11
Figure 5-3. Voltage Reference (Schematic)............................................................................................................................... 12
Figure 7-1. ADS1285EVM-PDK Jumper Default Settings......................................................................................................... 13
Figure 7-2. ADS1285 Software Installation Prompt................................................................................................................... 14
Figure 7-3. Device Driver Installation Wizard Prompts.............................................................................................................. 15
Figure 7-4. LabVIEW Run-Time Engine Installation.................................................................................................................. 15
Figure 8-1. EVM GUI Global Input Parameters......................................................................................................................... 16
Figure 8-2. Register Map Configuration..................................................................................................................................... 17
Figure 8-3. Time Domain Display Tool Options......................................................................................................................... 18
Figure 8-4. Spectral Analysis Tool............................................................................................................................................. 19
Figure 8-5. Histogram Analysis Tool.......................................................................................................................................... 20
Figure 8-6. DAC Configuration Tool Page................................................................................................................................. 21
Figure 9-1. Top Silkscreen......................................................................................................................................................... 27
Figure 9-2. Top Layer................................................................................................................................................................. 27
Figure 9-3. Ground Layer 1....................................................................................................................................................... 27
Figure 9-4. Power Layer............................................................................................................................................................ 27
Figure 9-5. Bottom Layer........................................................................................................................................................... 27
Figure 9-6. Bottom Silkscreen................................................................................................................................................... 27
Figure 9-7. ADS1285EVM-PDK Block Diagram........................................................................................................................ 28
Figure 9-8. ADS1285EVM-PDK ADC Schematic...................................................................................................................... 29
Figure 9-9. ADS1285EVM-PDK Analog Inputs and Common-Mode Buffer Schematic............................................................. 30
Figure 9-10. ADS1285EVM-PDK Clock and Interface Schematic............................................................................................. 31
Figure 9-11. ADS1285EVM-PDK Power-Supply Schematic...................................................................................................... 32
Figure 9-12. ADS1285EVM-PDK Reference Voltage Schematic.............................................................................................. 33
Figure 9-13. ADS1285EVM DAC Schematic............................................................................................................................. 33
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2 ADS1285EVM-PDK Evaluation Module SBAU394A – APRIL 2022 – REVISED SEPTEMBER 2022
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