HD6413007F20 Datasheet, PDF (564/798 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

15. A/D Converter
8. Effect on Absolute Accuracy: Attaching an external capacitor creates a coupling with ground,
so if there is noise on the ground line, it may degrade absolute accuracy. The capacitor must be
connected to an electrically stable ground, such as AV_SS.
If a filter circuit is used, be careful of interference with digital signals on the same board, and
make sure the circuit does not act as an antenna.
Sensor output impedance
Up to 10 kΩ
Sensor
input
Low-pass
filter
C Up to 0.1μF
H8/3006 and
H8/3007
Cin =
15 pF
Equivalent circuit of
A/D converter
10 kΩ
20 pF
Figure 15.11 Analog Input Circuit (Example)
Rev.5.00 Sep. 12, 2007 Page 534 of 764
REJ09B0396-0500