AnsweredAssumed Answered

AD7734 sampling rate

Question asked by nwood on Jul 18, 2018
Latest reply on Jul 19, 2018 by JellenieR

Hi,

I'm using an AD7734 ADC to take sensor readings but the sampling rates I'm getting from it seem to be slower than indicated on the datasheet for a given filter word. Shown in the table are the specced conversion times and the conversion times I have measured with chopping enabled.

 

 

FW         

Datasheet conversion time (us)

Measured conversion time (us)
12726867940
469992960
224991500

 

I'm using an ATmega328p to communicate with the ADC via SPI and I'm thinking the processor might be the problem but was hoping someone could confirm that the data sheet conversion times are indeed accurate.

 

Thanks.

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