SH7206 Datasheet, PDF (885/1188 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series

Sensor input
Sensor output impedance
Up to 5 kΩ
Low-pass filter
C to 0.1 µF
This LSI
Cin =
15 pF
Section 17 A/D Converter (ADC)
A/D converter
equivalent circuit
3 kΩ
20 pF
Note: Values are reference values.
Figure 17.10 Example of Analog Input Circuit
17.7.6 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
AVss.
Care is also required to insure that filter circuits do not communicate with digital signals on the
mounting board (i.e., acting as antennas).
17.7.7 Note on Usage in Scan Mode and Multi Mode
Switching to single mode and then starting conversion immediately after having stopped scan
mode or multi mode operation may lead to erroneous results of conversion in single mode.
To perform conversion in single mode in such cases, set ADST to 0, wait for at least the A/D
conversion time for a single channel to elapse, and then start conversion (ADST = 1). (The A/D
conversion time for a single channel will vary according to the settings of the ADC registers).
Rev. 3.00 Jun. 18, 2008 Page 861 of 1160
REJ09B0191-0300