ADS1291IRSMT datasheet(40/83 Pages) TI2

40 / 83 page

Set CLKSEL Pin = 1

and Wait for Oscillator

to Wake Up

Analog/Digital Power-Up

// Follow Power-Up Sequencing

External

Clock

Yes

// If START is Tied High, After This Step

// DRDY Toggles at fMOD/256

Set CLKSEL Pin = 0 and

Provide External Clock

fCLK = 512 kHz

Set PWDN/RESET = 1

Wait for 1 s for

Power-On Reset

// Delay for Power-On Reset and Oscillator Start-Up

Issue Reset Pulse,

Wait for 18 tCLKs

Send SDATAC

Command

External Reference

Write Certain Registers,

Including Input Short

Set PDB_REFBUF = 1

and Wait for Internal

Reference To Settle

Set START = 1

RDATAC

Capture Data and

Check Noise

Set Test Signals

Capture Data and

Test Signals

// Activate DUT

//CS can be Either Tied Permanently Low

// Or Selectively Pulled Low Before Sending

// Commands or Reading/Sending Data From/To Device

// If Using Internal Reference, Send This Command

-- WREG CONFIG2 A0h

// Device Wakes Up in RDATAC Mode, so Send

// SDATAC Command so Registers can be Written

SDATAC

// DRATE = 500 SPS

WREG CONFIG1 02h

// Set All Channels to Input Short

WREG CHnSET 01h

// Activate Conversion

// After This Point DRDY Should Toggle at

// fCLK Review

// Put the Device Back in RDATAC Mode

RDATAC

// Look for DRDY and Issue 24 + n

24 SCLKs

// Activate a (1 mV VREF/2.4) Square-Wave Test Signal

// On All Channels

SDATAC

WREG CONFIG2 A3h

WREG CHnSET 05h

RDATAC

// Look for DRDY and Issue 24 + n

24 SCLKs

ADS1291, ADS1292, ADS1292R

SBAS502C – DECEMBER 2011 – REVISED APRIL 2020

www.ti.com

Product Folder Links: ADS1291 ADS1292 ADS1292R

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Figure 44. Initial Flow at Power-Up

ADS1291IRSMT Datasheet(PDF) 40 Page - Texas Instruments

ADS1291IRSMT Datasheet(HTML) 40 Page - Texas Instruments

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