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ADuC7060/61: Electrical Specs for A/D input impedance

Question asked by V.M. on Jun 29, 2011
Latest reply on Jun 30, 2011 by MikeL

Except for leakage spec, there are no indications in the datasheet (Rev.C) of the input impedance of the Main and Auxilliary A/D (with and without bufferring and/or PGA). It is almost impossible to design anything without these specs... dependence on the source impedance, anti-aliasing filters, etc...

 

Please provide these specifications.

 

This thread is somewhat related to the previous two postings:

 

ADuC7060/61: Effects of bypassing PGA (Main A/D) and Buffer (Auxiliary A/D)

http://ez.analog.com/message/27607#27607

 

ADuC7060/61: Effects of setting PGA Common Mode bit (AMP_CM in ADC0CON MMR)

http://ez.analog.com/message/27627#27627

 

Please answer the above two postings -- they are getting stale being unaswered for 5 days :-)

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