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AD9257 Processing of the VCM pin

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We are evaluating the AD9257, and concerned that the input of the VCM pin can affect the saturation performance of the ADC.

We entering the following signal to the ADC in our system.
・Common mode voltage = 1.1V
・Differential input voltage = +/- 1.0V
When entering these signals, do I need to supply 1.1V to the VCM pin from external?

If we need to enter from external, could you please provide sample circuit that recommended?

 

Best regards,
Tak


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