ADA2200 - Choosing the right ADC

Hello there,

I want to use the ADA2200 to build a dual lock-in amplifier. In order to do so I want to use an ADC after it.

My question about the ADC is:

What are the important Parameter I have to look on when I want to use an ADC in connection with ADA2200?

Unfortunately the ADV in the datasheet didn't full fill my expectation, because it is only a 12 Bit ADC. I want to use an 32 Bit ADC to get an resolution in the range of nano Volts.

Thank you for your supply!

Greetings

Chris

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  • Hi Riley,

    It looks like the ADA2200 datasheet has an error.  As you point out, the AD7170 does not have a way of synchronizing its data conversions with the SYNCO pin of the ADA2200.

    You could choose a SAR converter like the AD7091 which does have a ~CONVST input and use the SYNCO output of the ADA2200 as shown in the datasheet. 

    Sorry for the mistake in the datasheet.

    Brian

Reply
  • Hi Riley,

    It looks like the ADA2200 datasheet has an error.  As you point out, the AD7170 does not have a way of synchronizing its data conversions with the SYNCO pin of the ADA2200.

    You could choose a SAR converter like the AD7091 which does have a ~CONVST input and use the SYNCO output of the ADA2200 as shown in the datasheet. 

    Sorry for the mistake in the datasheet.

    Brian

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