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ADS131E08EVM-PDK: Raw Data only showing even numbers

Part Number: ADS131E08EVM-PDK

Dear Team,

a customer evaluates the ADS131E08 EVM and noticed that all raw data are even numbers.

Just some numbers as example from a full sweep (negative saturation to positive saturation):

7FFFFF
791CE2
5A7058
2D7CE2
F9951C
C6BCAA
9CFB9A
83204E
800000

This was noticed with all 8 channels.

How could this be explained?

Thanks and best regards
Martin

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1 Reply

  • Hi Martin,

    7FFFFF is an odd number, but I'm sure your customer is more concerned that he does not see any odd codes between +/- full-scale. For any given input voltage, we should see some level of noise that causes the last few bits toggle.

    Is your customer only taking one sample for each input voltage? Would you mind sending me a full list of several data points for a given input voltage (i.e. at least 100 points)?

    Best Regards,


     Ryan Andrews

    Precision Analog ΔΣ ADCs