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AD2S1205/AD2S1210 Common-Mode Voltage

Question asked by benwang on Nov 19, 2013
Latest reply on Nov 26, 2013 by benwang
Branched from an earlier discussion



As of AD2S1205, the datasheet features norminal 1.25V offset on SIN/COS pins, but in my customer application, they have 2.5V offset on SIN/COS pins by using external buffer, and looks it is workable for long time withou fault.


My question is that it is really correct for 1.25V+/-100mV offset on SIN/COS pins as AD2S1205 datasheet? and if it is 2.5V offset on SIN/COS pins, what will happen over long time?


On AD2S1210 datasheet, the spec of 1.25V nonimal offset on SIN/COS pins has been deleted, does it means AD2S1210 SIN/COS input signal common mode voltage could be varing flexibly?


Thank you & best regards