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Negative input buffer turn-on or turn-off?

Question asked by kai_klaas on Feb 9, 2018
Latest reply on Mar 1, 2018 by kai_klaas

Hi folks,

I want to use the ADUCM361. Analog input signal is single ended and is between 200mV and 500mV (referenced to AGND). PGA gain shall be 2, as I need the input buffer. Data format is unipolar and the internal 1.2V reference shall be used. My question: As I need the input buffer, the positive input buffer must be turned on, of course. But what do I with the negative input buffer? Turn-on or turn-off?

Thanks, Kai