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Forum Post: Compiler/ADS1261EVM: Data acquisition (code) conversion to voltage mismatch (possible input impedance problem)

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Part Number: ADS1261EVM Tool/software: TI C/C++ Compiler Hello, I am having a bit of problems converting the acquire ADC's data (code) into voltage that match the input voltage. I am trying to do a single-ended measurement of an input sine wave (1mV pp), I noticed that whenever I acquire the data and convert the code to the voltage I seem to be getting a voltage of 3mV pp. I have a feeling that this issue have something to do with the input impedance. The question: What are the input independence for the inputs? It is possible to configure the input such that it would only look at a 50 ohm input impedance? thanks in advance .

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