PIC16F527 and FC10

[alanwms]

I see that the 16F527 has internal operational amplifiers. I started a new project to look at this and can't figure out how to use these peripherals. Do we have examples or info on this?

[mnfisher]

You'll need to handle the Analog peripheral setup in C by accessing the relevant registers..

APFCON, CM1CON0/CM2CON0 and OPACON

to:

Enable the op amp
Configure input selection
Enable output routing
Set gain mode

Do you have a specific use in mind?

[alanwms]

Sure - I want to setup a gain of around 25:1 so I can read a low signal. I'm not proficient writing C code to achieve my goal.

[mnfisher]

The documentation (datasheet) verges on the flimsy here - a little on the thin side.....

Apart from table 16-16 showing unity gain mode - there is little info (apart from two bits in OPACON to enable the op-amps)

Looking at the https://ww1.microchip.com/downloads/en/ ... 03280A.pdf document - reveals a lot more control - but the registers mentioned (for example OPA1CON0 don't seem to be present on the PIC16F527.

Do you have any info on it?

[mnfisher]

Seems o be more set up as a comparator than an op-amp
Martin

[chipfryer27]

Hi

This document is a bit more applicable.

Regards

TB3132.pdf

(271.09 KiB) Downloaded 13 times

[alanwms]

Thanks People!
On the flip side, do you know of better choices for a uP with opamp capacity?

[mnfisher]

PIC16F176x or PIC16F177x series might be worth a look...