RX610 Group
23. A/D Converter
R01UH0032EJ0120 Rev.1.20
Page 804 of 1006
Feb 20, 2013
23.6.9
Point for Caution Regarding Countermeasures for Noise
To prevent destruction of the circuits for the analog input pins by abnormal voltages such as excessively large surges,
connect capacitors as shown in figure 23.17 between AVcc and AVss, and between V
REFH
and V
REFL
; also connect suitable
protective circuits to the analog input pins (AN0 to AN15).
Rin
*
2
AVCC
VREFH
AN0 to AN15
AVSS
*
1
*
1
VREFL
0.1
µ
F
0.1
µ
F
The value in parentheses indicates the pin number.
1. The value is for reference.
2. Rin: Input impedance
Notes:
10
µ
F
0.01
µ
F
Figure 23.17 Example of a Protective Circuit for Analog Inputs
Summary of Contents for RX600 Series
Page 1006: ...RX610 Group R01UH0032EJ0120 ...