Renesas H8S/2319 series Hardware Manual page 568

Care is also required to insure that filter circuits do not communicate with digital signals on the
mounting board, so acting as antennas.
Sensor output
impedance
Max. 5 kΩ
Sensor input
Low-pass
filter
C to 0.1 µF
Note: Values are reference values.
Rev. 5.00, 12/03, page 538 of 1088
Chip
Figure 14-10 Example of Analog Input Circuit
C = 15 pF
in
A/D converter
equivalent circuit
10 kΩ
20 pF