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S9S12P32 ADC input

Question asked by HY Jung on Jun 3, 2019
Latest reply on Jun 13, 2019 by Daniel Martynek

We are using the S9S12P32.

R1, R2 resistance is 50 kohm and R4 is 30 kohm.
At this point, when the input voltage TP1 rises to 35 V, the voltage at the TP5 (ADC input) increases by about 8 V, when the current in the R4 is about 60uA.

The input voltage of the ADC on the S9S12P32 is up to 5.5V, but you are wondering if the current capacity is low and can be actually damaged.

Because of ZD1, the voltage deviation of the ADC is large and unnecessary for voltage measurements, it is intended to be removed.