ADS1291IRSMT datasheet(52/83 Pages) TI2

52 / 83 page

ADS1291, ADS1292, ADS1292R

SBAS502C – DECEMBER 2011 – REVISED APRIL 2020

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Product Folder Links: ADS1291 ADS1292 ADS1292R

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8.6.1 User Register Description

8.6.1.1 ID: ID Control Register (Factory-Programmed, Read-Only) (address = 00h)

This register is programmed during device manufacture to indicate device characteristics.

Figure 56. ID: ID Control Register (Factory-Programmed, Read-Only)

REV_ID7

REV_ID6

REV_ID5

REV_ID1

REV_ID0

Table 17. ID: ID Control Register (Factory-Programmed, Read-Only) Field Descriptions

Bits[7:5]

REV_ID[7:5]: Revision identification

000 = Reserved

001 = Reserved

010 = ADS1x9x device

011 = ADS1292R device

100 = Reserved

101 = Reserved

110 = Reserved

111 = Reserved

Bit 4

Reads high

Bits[3:2]

Reads low

Bits[1:0]

REV_ID[1:0]: Revision identification

00 = ADS1191

01 = ADS1192

10 = ADS1291

11 = ADS1292 and ADS1292R

8.6.1.2 CONFIG1: Configuration Register 1 (address = 01h)

This register configures each ADC channel sample rate.

Figure 57. CONFIG1: Configuration Register 1

SINGLE_SHOT

DR2

DR1

DR0

(1)

fCLK = 512 kHz and CLK_DIV = 0 or fCLK = 2.048 MHz and CLK_DIV = 1.

Table 18. CONFIG1: Configuration Register 1 Field Descriptions

Bit 7

SINGLE_SHOT: Single-shot conversion

This bit sets the conversion mode

0 = Continuous conversion mode (default)

1 = Single-shot mode

Bits[6:3]

Must be set to '0'

Bits[2:0]

DR[2:0]: Channel oversampling ratio

These bits determine the oversampling ratio of both channel 1 and channel 2.

BIT

OVERSAMPLING RATIO

DATA RATE(1)

000

fMOD / 1024

125 SPS

001

fMOD / 512

250 SPS

010

fMOD / 256

500 SPS (default)

011

fMOD / 128

1 kSPS

100

fMOD / 64

2 kSPS

101

fMOD / 32

4 kSPS

110

fMOD / 16

8 kSPS

111

Do not use

ADS1291IRSMT Datasheet(PDF) 52 Page - Texas Instruments

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