D12320VF25IV Datasheet, PDF (754/1304 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 16 A/D Converter (8 Analog Input Channel Version)
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
Max. 5 kΩ
Sensor input
Low-pass
filter C
to 0.1 µF
Chip
C_in = 15 pF
A/D converter
equivalent circuit
10 kΩ
20 pF
Note: Values are reference values.
Figure 16.10 Example of Analog Input Circuit
Rev.6.00 Sep. 27, 2007 Page 722 of 1268
REJ09B0220-0600