ADS131M08IPBSR datasheet(2/118 Pages) TI2

2 / 118 page

Table of Contents

1 Features............................................................................1

2 Applications..................................................................... 1

3 Description.......................................................................1

4 Revision History.............................................................. 2

5 Pin Configuration and Functions...................................4

6 Specifications.................................................................. 6

6.1 Absolute Maximum Ratings ....................................... 6

6.2 ESD Ratings .............................................................. 6

6.3 Recommended Operating Conditions ........................7

6.4 Thermal Information ...................................................7

6.5 Electrical Characteristics ............................................8

6.6 Timing Requirements ...............................................10

6.7 Switching Characteristics .........................................10

6.8 Timing Diagrams....................................................... 11

6.9 Typical Characteristics.............................................. 13

7 Parameter Measurement Information.......................... 18

7.1 Noise Measurements................................................ 18

8 Detailed Description......................................................19

8.1 Overview................................................................... 19

8.2 Functional Block Diagram......................................... 19

8.3 Feature Description...................................................20

8.4 Device Functional Modes..........................................31

8.5 Programming............................................................ 37

8.6 Registers...................................................................47

9 Application and Implementation.................................. 89

9.1 Application Information............................................. 89

9.2 Typical Application.................................................... 96

10 Power Supply Recommendations............................103

10.1 CAP Pin Behavior................................................. 103

10.2 Power-Supply Sequencing....................................103

10.3 Power-Supply Decoupling.....................................103

11 Layout......................................................................... 104

11.1 Layout Guidelines................................................. 104

11.2 Layout Example.................................................... 105

12 Device and Documentation Support........................106

12.1 Documentation Support........................................ 106

12.2 Receiving Notification of Documentation Updates106

12.3 Support Resources............................................... 106

12.4 Trademarks...........................................................106

12.5 Electrostatic Discharge Caution............................106

12.6 Glossary................................................................106

13 Mechanical, Packaging, and Orderable

Information.................................................................. 106

4 Revision History

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

Changes from Revision A (December 2019) to Revision B (February 2021)

Page

• Updated the numbering format for tables, figures, and cross-references throughout the document .................1

• Added gain of 128 to High impedance inputs bullet........................................................................................... 1

• Added Protection relays and Power quality meters to Applications section....................................................... 1

• Changed Applications section ........................................................................................................................... 1

• Changed WQFN package from preview to active ..............................................................................................1

• Removed capacitor recommendation for REFIN pin in Pin Functions table ......................................................4

• Corrected analog input pin numbering in Pin Functions table ........................................................................... 4

• Added thermal pad to pinout diagram ................................................................................................................4

• Added Differential input voltage range using external reference........................................................................ 7

• Added long-term reference and gain error drift in WQFN package in Electrical Characteristics table............... 8

• Changed tsu(SY) parameter description in Timing Requirements table............................................................. 10

• Changed SPI Timing Diagram and SYNC/RESET Timing Requirements figures............................................ 11

• Added typical characteristics plots....................................................................................................................13

• Removed recommendation for decoupling capacitor when using internal reference....................................... 21

• Changed Clocking and Power Modes section.................................................................................................. 22

• Changed description of modulator frequency and added fMOD equation in ΔΣ Modulator section................... 22

• Changed Digital Filter section...........................................................................................................................22

• Changed Digital Filter Implementation title and section ...................................................................................23

• Updated description of the test signal derived from the internal reference.......................................................26

• Changed communication cyclic redundancy check (CRC) seed value............................................................ 29

• Added DRDY transitions in Power-Up and Reset section................................................................................ 31

ADS131M08

SBAS950B – OCTOBER 2019 – REVISED FEBRUARY 2021

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