ADS1291IRSMT datasheet(2/83 Pages) TI2

2 / 83 page

ADS1291, ADS1292, ADS1292R

SBAS502C – DECEMBER 2011 – REVISED APRIL 2020

www.ti.com

Product Folder Links: ADS1291 ADS1292 ADS1292R

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Table of Contents

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

Applications ........................................................... 1

Description ............................................................. 1

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

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

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

6.1

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

6.2

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

6.3

Recommended Operating Conditions ....................... 6

6.4

Thermal Information .................................................. 6

6.5

Electrical Characteristics........................................... 7

6.6

Timing Requirements .............................................. 11

6.7

Typical Characteristics ............................................ 12

Parameter Measurement Information ................ 15

7.1

Noise Measurements .............................................. 15

Detailed Description ............................................ 18

8.1

Overview ................................................................. 18

8.2

Functional Block Diagram ....................................... 18

8.3

Feature Description................................................. 19

8.4

Device Functional Modes........................................ 41

8.5

Programming........................................................... 41

8.6

Application and Implementation ........................ 62

9.1

Application Information............................................ 62

9.2

Typical Application ................................................. 62

Power Supply Recommendations ..................... 65

10.1

Power-Up Sequencing .......................................... 65

Layout................................................................... 66

11.1

Layout Guidelines ................................................. 66

11.2

Layout Example .................................................... 69

Device and Documentation Support ................. 70

12.1

Related Links ........................................................ 70

12.2

Receiving Notification of Documentation Updates 70

12.3

Support Resources ............................................... 70

12.4

Trademarks ........................................................... 70

12.5

Electrostatic Discharge Caution ............................ 70

12.6

Glossary ................................................................ 70

Mechanical, Packaging, and Orderable

Information ........................................................... 70

4 Revision History

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

Changes from Revision B (September 2012) to Revision C

Page

•

Added Device Information table, ESD Ratings table, title to page 1 figure, Recommended Operating Conditions

table, Feature Description section, Device Functional Modes section, Application and Implementation section,

Power Supply Recommendations section, Layout section, Device and Documentation Support section, and

Mechanical, Packaging, and Orderable Information section .................................................................................................. 1

•

Changed CMRR value from 105 dB to 120 dB in Features section ...................................................................................... 1

•

Changed Application section ................................................................................................................................................. 1

•

Changed QFN to VQFN throughout document ..................................................................................................................... 1

•

Added thermal pad data to RDM pin out package drawing .................................................................................................. 4

•

Changed Pin Functions title from Pin Assignments, changed Terminal column header to Pin, and corrected format

to show both package options ................................................................................................................................................ 4

•

Changed function and description of RESP_MODN/IN3N and RESP_MODP/IN3P pins, changed function of

RLDOUT pin from Analog input to Analog output, and added Thermal Pad row to Pin Assignments table.......................... 4

•

Deleted Family and Ordering Information table...................................................................................................................... 6

•

Changed CMRR parameter values from –105 dB to 105 dB (minimum) and from –120 dB to 120 dB (typical) in

Electrical Characteristics table ............................................................................................................................................... 7

•

Changed Noise Measurements section: deleted SNR equation, changed DYN RANGE and EFF RESOL column

headers in section tables...................................................................................................................................................... 15

•

Added last sentence to Internal Respiration Circuitry with External Clock (ADS1292R) section......................................... 39

•

Changed denominator of equation 10 ................................................................................................................................. 41

•

Changed first paragraph of Data Output (DOUT) section .................................................................................................... 42

•

Changed RDATAC Usage figure.......................................................................................................................................... 48

•

Changed RDATA Usage figure ............................................................................................................................................ 49

•

Changed ADS1292R Application section to fulfill Typical Application section ..................................................................... 62

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