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Forum Post: RE: ADS1256: Buffering for the ADS1256

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Hi Khoi, You are referring to the ADS1256 's internal input buffer, correct? Enabling the ADS1256 's internal buffer increases the input impedance of the ADC, is also causes a slight increase in noise. It is needed when using high-output impedance sensors, as the sensor output-impedance will interact with the ADC's input impedance and form a voltage divider (i.e. gain error). Unless your input source is already buffered, then I would usually recommend enabling the internal buffer.

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