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AD9548 - Unused REF Inputs

Question asked by Fred1 on May 28, 2012
Latest reply on May 28, 2012 by pkern

Hi,

 

I need some advice on what to do with unused REFx inputs on the AD9548.

 

I can currently see 3 options:

 

1. Do not connect them at all.

2. Connect them to Ground. (but what is with the bias voltage on the pin?)

3. Ground them via a 100nF resistor as done on the Eval board. (Brings up component count...)

 

What is the best practice?

 

Regards,

Fred

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