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ADS131E08: 64 KSPS Data Rate setting

Part Number: ADS131E08

Hi Ti,

i am trying to set config1 register to 0x90 to make ADC to run at 64ksps Data rate. But still ADC is running at 32ksps.

I have tried 8,16,32ksps those looks to be fine DRDY is coming as expected. But when i tried to run ADC at 64ksps by writing to Config1 register it is still running at 32ksps.

Any additional registers need to be written to make ADC run at 64ksps? 


  • Hi ANJAN,

    All registers are listed in the table 10 of datasheet. 

    First, 0x98 should be written into the CONFIG1 register to select a data rate except the default 32ksps. Also, make sure your data size is 16-bit.

    Second, if the above advice does not work. I would suggest you to check two things: 

    1. Check if the data is correctly written into the device. I would suggest to read the register back to verify if the writing of the register setting the data rate is correct.
    2. If you're using a scope to check the /DRDY signal, I would suggest you to make sure that the scope resolution is enough to capture the /DRDY signal. If the /DRDY pulse is narrow, then the scope resolution may miss all of the output pulses. You should be able to see the /DRDY signals at the 32kSPS and 64kSPS data rates every 31us and 15.6us respectively.