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ADS1146: ADS1146 Schematic diagram of power circuit.

V01demar no
Prodigy 10 points
Part Number: ADS1146

Please help to check and advise circuit diagram.
It is correct power circuit for single ended mode?
Can i use external reference voltage like this(6pin REFN to GND) ?
Thank you.

  • +1
    TI__Guru 52586 points

    Hi V01demar,

    This circuit looks correct. You have a single-ended measurement and are using bipolar supplies (+/-2.5V) in order to meet the VCM requirements specified in equation 3 in the ADS1146 datasheet.

    The reference connection looks correct as well. I did not confirm if the passive values around the REF5020 were correct however, I defer to you on that.

    -Bryan