ADS131M03
SBAS889A – JANUARY 2020 – REVISED APRIL 2021
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Table of Contents
1 Features............................................................................1
2 Applications.....................................................................1
3 Description.......................................................................1
4 Revision History.............................................................. 2
5 Pin Configuration and Functions...................................3
6 Specifications.................................................................. 4
6.1 Absolute Maximum Ratings ....................................... 4
6.2 ESD Ratings .............................................................. 4
6.3 Recommended Operating Conditions ........................5
6.4 Thermal Information ...................................................5
6.5 Electrical Characteristics ............................................6
6.6 Timing Requirements .................................................8
6.7 Switching Characteristics ...........................................8
6.8 Timing Diagrams.........................................................9
6.9 Typical Characteristics..............................................10
7 Parameter Measurement Information..........................15
7.1 Noise Measurements................................................15
8 Detailed Description......................................................16
8.1 Overview...................................................................16
8.2 Functional Block Diagram.........................................16
8.3 Feature Description...................................................17
8.4 Device Functional Modes..........................................28
8.5 Programming............................................................ 34
8.6 ADS131M03 Registers............................................. 44
9 Application and Implementation..................................71
9.1 Application Information............................................. 71
9.2 Typical Application.................................................... 78
10 Power Supply Recommendations..............................85
10.1 CAP Pin Behavior................................................... 85
10.2 Power-Supply Sequencing......................................85
10.3 Power-Supply Decoupling.......................................85
11 Layout...........................................................................86
11.1 Layout Guidelines................................................... 86
11.2 Layout Example...................................................... 87
12 Device and Documentation Support..........................88
12.1 Documentation Support.......................................... 88
12.2 Receiving Notification of Documentation Updates..88
12.3 Support Resources................................................. 88
12.4 Trademarks.............................................................88
12.5 Electrostatic Discharge Caution..............................88
12.6 Glossary..................................................................88
13 Mechanical, Packaging, and Orderable
Information.................................................................... 88
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision * (January 2021) to Revision A (April 2021)
Page
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Changed PW (TSSOP) package from preview to production data.....................................................................1
Changed maximum data rate from 32 kSPS to 64 kSPS in Features section....................................................1
Added gain of 128 to High impedance inputs bullet........................................................................................... 1
Corrected analog input pin numbering in Pin Functions table ........................................................................... 3
Added footnote for Absolute Maximum Ratings table.........................................................................................4
Updated maximum data rate for all power modes.............................................................................................6
Updated typcial characteristics plots DC CMRR vs AVDD, DC CMRR vs Temperature and Dynamic Range vs
Gain ................................................................................................................................................................. 10
Updated description of the test signal derived from the internal reference ......................................................23
Deleted comments about MOSI, MISO, slave, and master..............................................................................34
Changed Register Map table............................................................................................................................44
Changed root cause description in Troubleshooting section ........................................................................... 77
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Copyright © 2021 Texas Instruments Incorporated
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