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PGA- Programmable Gain Amplifier

Question asked by florijan japelj on Jul 15, 2013
Latest reply on Jul 15, 2013 by bigmac

Hi,

 

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.

 

Best regards,

Florijan

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