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ADS1258: ADS1258 Reference Schematic (with Biopolar, pseudo differential)

BEOMSU KIM
Prodigy 30 points
Part Number: ADS1258

I have configured the circuit as shown below. Are there any problems?
Please help. In particular, since this is my first time using an ADC with a mux part, I am not sure if it is right to add a buffer like that.

The customer's requirements are
V: +1V to -1V
Input qty: 8Differential or 16Single-end
It was composed based on .

  • 0
    TI__Guru** 113765 points

    Hi Beomsu Kim,

    The biggest issue is with the buffers.  The buffers are powered unipolar 5V supply but the ADS1258 is powered from a +/-2.5 V bipolar supply.  If the maximum input signal is +/- 1V, you could narrow the full-scale range for better resolution by lowering the reference voltage.

    Best regards,

    Bob B