HD6432345 Datasheet, PDF (537/907 Pages) Hitachi Semiconductor – H8S/2345 F-ZTAT Hardware Manual

Influences on Absolute Precision: Adding capacitance results in coupling with GND, and
therefore noise in GND may adversely affect absolute precision. Be sure to make the connection
to an electrically stable GND such as AV_SS.
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
to 10 k Ω
Sensor input
Low-pass
filter
C to 0.1 µF
H8/2345 Series
A/D converter
equivalent circuit
10 kΩ
C_in =
15 pF
20 pF
Note: Values are reference values.
Figure 14.11 Example of Analog Input Circuit
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