Hello All,

I have been trying to design an ADC digital filter (we are using AD7795 ADC), but can't figure out how to calculate ADC digital filter constants (let say 3 order). Can anyone of you tell me where to find supplements or materials that I can use to calculate the filter constants?

Thanks,

Anadig

Hello Anadig,

is this a general question or are you asking about the AD7795 digital filter specifically. There is an excel model on the AD7795 product page which shows the filter response of the AD7795 digital filter at different output data rates. The model indicates the corresponding output data rate, settling time and 50/60 Hz rejection for the configuration selected. The model is at

http://www.analog.com/en/analog-to-digital-converters/ad-converters/ad7795/products/dt-design-calculators/Digital_Filter_Spreadsheets/resources/fca.html

Regards,

Mary.