I have an application in which I need to sense voltage from 0-1.8 mV from pressure sensor. I am using PGA (32x) and 12bit ADC inside MC9S08MP mcu. So far everything works ok except ADC measurements are not so stable. I am using software averaging to get more stable results. My question here is simple:
How to initialize ADC and PGA to get the best possible accuracy and stable results? Are there any tricks with this peripherals? The mcu bus frequency is 1MHz max.