Part Number: ADS1204 Hello, In the data sheet of the ADS1204 the following is mentioned: "The input impedance (of the ADS1204 ) becomes a consideration in designs where the source impedance of the input signal is high. This high impedance may cause degradation in gain, linearity and THD. The impedance of my source signal is 12.3kOhm which I will convert into a delta-sigma bitstream using the ADS1204 with an external clock frequency fext of 20MHz. According to the Formula below I calculated an input impedance Zin of 100kOhm (fmod = fext/2). Together they form a voltage divider with a gain of approximately 0.89. Is there another, additional influence on the gain caused by the high source impedence? What influence does it have on the Linearity and the THD of the output signal? Do you have any recommendations to improve the performance in my specific application? Thank you! Best, Nicole
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