ADM7150 as reference supply for AD7691

Hi,

I thought to use the ADM7150 as "reference" and power supply to AD7691 and the 350R bridge.
As I want to do ratiometric measurement, accuracy and drift should be no problem?

As the bridge will be chopped (+/-5V), I need a "reference" with at least 20mA and very good dynamic regulation.

Is this regulator a good chioce for that? Are there better alternatives?

Parents
  • Hi,

    thanks for the info.

    As I want to supply the 350R bridge with that regulator also, there will be a constant 14mA drawn from the bridge.

    There might be a problem when load current drops sharply. I had already an overvoltage caused by an LT regulator.

    I will add an "overvoltage-absorber" to protect the sensitive converter.

    Is there a reference that has ~20mA current capability?

    Because I think that adding a transistor for current boost will degrade noise performance and stability, correct?

    Is there a LDO with sink capability?

    Regards

    Axel

Reply
  • Hi,

    thanks for the info.

    As I want to supply the 350R bridge with that regulator also, there will be a constant 14mA drawn from the bridge.

    There might be a problem when load current drops sharply. I had already an overvoltage caused by an LT regulator.

    I will add an "overvoltage-absorber" to protect the sensitive converter.

    Is there a reference that has ~20mA current capability?

    Because I think that adding a transistor for current boost will degrade noise performance and stability, correct?

    Is there a LDO with sink capability?

    Regards

    Axel

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