I am trying to interface a K type thermocouple to the ADC channel of a Microchip part.
I am interested in negative (to -2mV) and Positive ( to + 4mV) voltages but don't know how to feed them into the ADC to get the full 12 bit resolution over this range of input voltage.
I realise I need to amplify the output from the thermocouple and yes, I know all about cold junction compensation etc. I just need some ideas of how to interface the -2mv to +4mV signal into the ADC.
Thanks in advance