> Can any of you recommend a D-to-A converter with a single-wire digital-side interface? Any SOT23-5 PIC. Scott Datallo's Sigma Delta ADC routines. Software PWM if needs be. Can interleave between ADC isochronous actions. If IRQ available PWM can be IRQ driven AND simplify Sigma Delta isochronous timing need. Not totally trivial but reasonably simple. For extra points you can almost certainly do the ADC input and digital output on the same pin :-). Russell McMahon On 12 April 2012 20:41, Richard Prosser wrote: > On 12 April 2012 14:42, Neil wrote: >> 10F320/2 looks really good. =A0Only thing I'm wondering is that it seems >> the PWM voltage output is based on the supply voltage, so for higher >> accuracy, should I run the analog output back into an A/D for some type >> of dynamic closed-loop adjustment? =A0If so, I'd go for something with >> =A0>8-bit A/D. >> >> Alternatively, I could monitor the power-supply voltage and adjust the >> PWM value accordingly. =A0But here too a 10-bit A/D would be nice. >> >> The 12F1501 looks promising. >> >> Cheers, >> -Neil. >> >> > > How about clamping the output PWM at a level a bit below the supply > voltage? That would reduce the dependency. Just watch out for > temperature variation! > > RP > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .