AD5546: reference input circuit

Document created by analog-archivist Employee on Feb 23, 2016Last modified by analog-archivist Employee on Feb 23, 2016
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If the reference input is an AC signal as stated below in figure1 and I still
would like a bipolar output, but I don't use the U2A OP2177, and float the R1A,
ground the RCOMA, then apply AC signal directly to VREFA. Is this  connection
ok or it will cause any problem?


 

I have attached a possible circuit. It is figure 19 on the datasheet but with
small changes. Keeping R1 and R2 connected will give a better performance in
the input signal.
I would like to highlight that the output will show the input signal inverted.

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