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ADS131M04: Sample rate not changing as per OSR setting

Part Number: ADS131M04

Sample rate is not changing as per the OSR setting in CLOCK register. Always getting nearly 1ksps no matter what the OSR setting is. Measured the sample rate using both software counts as well as using scope on DRDY pin and getting the same 1ksps on both.
The device is set to Standby before writing the OSR setting in CLOCK register and set to Wakeup after writing the register. Tried reading the CLOCK register back after wakeup and reading what we have written. So that means CLOCK register is being written but sample rate is not changing based on the OSR value.

Could you please help me on this at the earliest as we are on a crucial stage of the project?

  • Hi Rejitha Rajappan,

    Welcome to TI E2E forum.

    What's the default data rate or /DRDY period after your ADS131M04 device is powered up? Please share your schematic and SPI timing captured with a scope or logic analyzer when you write and read the CLOCK register back.

    BR,

    Dale