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ADS 1292 diagnostic

Other Parts Discussed in Thread: ADS1292

Hi,

We are using ADS 1292 with the customized PCB. And we would like to check that it is working as expected or not. I mean, is there any problem in the connection on either side i.e. with SoC or with leads?

Is there any mechanism available within chip it self or can you help us to define one?

Thanks,

Dhaval

  • Dhaval,


    I have moved your post to the correct forum and someone will answer your question.

  • Hi,

    can anyone on this forum please help me with the answer/suggestions?

    Thanks,

    Dhaval

  • Hi Dhaval,

    In case you still need some help here, I have a few suggestions for verifying device functionality:

    1. Power up the board and probe the supplies and reference pins to make sure they are receiving the correct voltages.
    2. After the correct power-up sequence is followed, /DRDY should automatically pulse at the default Data Rate of 500 SPS. (per our other conversation, I know that you are experiencing an issue with 250 SPS).
    3. Configure the device to use the internal Test Signal and verify that you can read correct data from the device. 

    If you are able to do these 3 things, then it would seem that the device is functional and ready to go.

    Best Regards,

  • Hi Ryan,

    Thanks for your reply.

    Actually we are looking for the solution which I can implement in firmware. I can configure the device to use the internal test signal and I can also read the data, but how can I verify that it is correct?

    Do we have any sample code for the same, which I can refer?

    Please help me on this.

    Thanks,

    Dhaval

  • Hi Dhaval,

    The values that you read from the ADS1292 can be quickly translated from hexadecimal codes to the input voltage values that they correspond to. To give an example:

    For VREF = 2.42 V and PGA = 6, the LSB size equals (2*2.42 / 6) / (224 - 1) = 48.1 nV. If you configure the Test Signal to be a 1 Hz square wave of +/- 1 mV, the corresponding output codes should translate to about +/- 20,800 (after converting the 2's Compliment hex into decimal). This should tell you if your device and firmware are working properly.

    I can send you the firmware for the ADS1292 EVM at your profile's email address if you think it will help further. 

    Best Regards,