ADC Input Impedance

sjackson · ‎2007-12-12

Posted on December 13, 2007 at 07:22

ADC Input Impedance

sjackson · ‎2011-05-17

Posted on May 17, 2011 at 09:43

Where can I find a spec for the input impedance of the ADC on the STR912?

I've looked in the datasheet but don't see it anywhere (one would expect to see it in the ''ADC Electrical Characteristics'' section).

Thanks.

ocean_front_view · ‎2011-05-17

Posted on May 17, 2011 at 09:43

Can a ST applications engineer please answer this question. This is a very standard spec. that should be in the data sheets.

FYI I measure 1.3uA.

claus · ‎2011-05-17

Posted on May 17, 2011 at 09:43

I asked the tech Support..

If AD-Input-Voltage is in the range 0V..VDDQ: Rin> 100MOhm, Cin = 5pF