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?

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  • 0
    •  Analog Employees 
    on Feb 5, 2014 12:36 AM

    Hi,

    We do not generally recommend LDOs to supply the REF pin since it does not have the ability to sink current. It may work, but the only way to know for sure is to test it. The AD7691 is proven to work well with ADR435, it's the recommended reference as per datasheet and was also used on the AD7691 datasheet. It can source/sink current up to 10mA only.

    Regards,

    Karen

Reply
  • 0
    •  Analog Employees 
    on Feb 5, 2014 12:36 AM

    Hi,

    We do not generally recommend LDOs to supply the REF pin since it does not have the ability to sink current. It may work, but the only way to know for sure is to test it. The AD7691 is proven to work well with ADR435, it's the recommended reference as per datasheet and was also used on the AD7691 datasheet. It can source/sink current up to 10mA only.

    Regards,

    Karen

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