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How to connect DAC to op amp in PIC32?

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realexander
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2020/06/03 11:24:05 (permalink)
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How to connect DAC to op amp in PIC32?

Hi,
 
I'm using a PIC32MK1024MCF064 and I want to pipe the DAC output through a unity gain op amp. But I'm having trouble figuring out how.
 
The DAC reference manual (http://ww1.microchip.com/...iceDoc/60001327A.pdf), page 2, says "The voltage can be used as a reference source for comparators or can be used as an offset to an Op amp" and "Output of CDAC can be internally connected to Opamp/Comparator input as reference voltage."
 
But the op amp manual (http://ww1.microchip.com/...ator_DS60001178C.pdf), page 3, has a block diagram that does not show a path from the DAC output to an op amp input (it does, however, have a path from the DAC to the comparator). And none of the SFRs seem to configure the op amp's inputs as needed.
 
What am I missing?
 
Thank you,
   Bob
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    jrmymllr
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    Re: How to connect DAC to op amp in PIC32? 2020/06/04 04:31:27 (permalink)
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    I don't see a way to connect the DAC to the op-amp either other than by external means. I'm guessing it's a typo and this is a good, straightforward question to ask of Microchip. 
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