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Integrated Low Pass? ADS1015
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Integrated Low Pass? ADS1015

by richard37 on Thu Jul 07, 2022 9:05 am

Im using an ADS 1015 in continous mode to measure some dc voltages from 0V to 3.3V. I wanted to know, if the adc is accurate and when I used a voltmeter I found out, that the signals I measure have a noise of 0.5 Vpp. You can't see the noise in the data from the ADS 1015.

Does the ADS 1015 has some kind of a low pass and what is the cut off frequency? Or why can't I see the noise in my measurements?

richard37
 
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Re: Integrated Low Pass? ADS1015

by sj_remington on Thu Jul 07, 2022 10:53 am

All voltmeters effectively have some sort of low pass filter response, because it takes time to sample the input, but the response depends heavily on the voltage source impedance.

Help forum members help you by describing the circuit you are measuring (post a schematic), posting a link to the voltmeter, and the code controlling the ADS1015. Also, please post some examples from the output stream of the ADS1015.

sj_remington
 
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Please be positive and constructive with your questions and comments.