Infineon Technologies CYPRESS Traveo Series Manual page 240

Notes on A/D converters
9.1.5.2
About the Output Impedance of an External Circuit for Analog Input
When the external impedance is too high, the analog voltage sampling time may become insufficient. In this case, we recommend
attaching a capacitor (about 0.1 µF) to an analog input pin.
Analog input circuit model
Analog input
Sampling ON
R C
12-bit A/D 3.9 kiloohms (max)
Note: Use the numerical values provided here simply as a guide.
Document Number: 002-10634 Rev. *J
R
C
11.0 pF (max)
Comparator
(4.5 V ≤ AV 5 ≤ 5.5 V)
CC
S6J3350 Series
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