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If AD7770 has Vss=0 and Vdd=3.3 can one connect the inputs with AIN- = gnd and AIN  = 1.65V±1.25V

Question asked by meterman on Oct 11, 2016
Latest reply on Oct 13, 2016 by JellenieR

Trying to understand the input voltage ranges for the Ad7770/7771/7779 ADCs.  If I have bipolar supplies (±1.65V) then I can use either a single ended drive with AIN- = gnd and AIN+ = ±1.25V  or differential drive where AIN- = -AIN+ and AIN+ = ±1.25V.

If I have a unipolar supply Vss = 0V and Vdd = 3.3V, can I use an input configuration with AIN- = 0V and AIN+ = 1.65 ±1.25V or do I set AIN- = 1.65V and AIN+ = 1.65 ±1.25V.

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