Check this out.......document page 21.

http://ww1.microchip.com/downloads/en/DeviceDoc/MCP6V51-Data-Sheet-DS20006136A.pdf

It's quite amazing what is going on in there, at so little power.

 

It's not an April fools thing?

Impressive.

 

Check this out.......document page 21.
http://ww1.microchip.com/downloads/en/DeviceDoc/MCP6V51-Data-Sheet-DS20006136A.pdf
It's quite amazing what is going on in there, at so little power.

I've been using Maxim's MAX44246, which is similar.

Auto-zeroing op amps such as these, with input offset voltages of only a few microvolts and essentially no input offset voltage drift or 1/f noise, make designing a LOT easier for circuits where extreme DC precision is needed.