A/D Converter Pins - Renesas R-IN32M4-CL2 User Manual

R-IN32M4-CL2 User's Manual: Board design edition
16.

A/D Converter Pins

The following figure shows a recommended connection example between the A/D converter power supply pins and
analog input pins.
R-IN32M4-CL2
ADTRG (RP02)
ADTRGRDY (RP03)
AVREFP
AVREFM
AIN0-AIN7
Figure 16.1 Recommended Connection Example for A/D Converter
Notes 1. Same potential as AVDD
2. Same potential as AGND
R18UZ0046EJ0200
Dec. 28, 2018
Control these signals according to the usage.
Place the 0.1-µF capacitor in the
immediate vicinity of the pin.
AVDD
0.1µF 10µF
AGND
0.1µF 10µF
100Ω
1000pF to 0.1µF
Note2
Note1
3.3V
FB
Since noise from the power supplies for
FB
the digital systems affects the 3.3V/
Note1
3.3V
AGND power-supply lines for the A/D
FB converter, we recommend using ferrite
Note2
beads and the like to separate the power
supply lines.
FB
Note2
Analog input
Configuration example of low-pass filter circuit
16. A/D Converter Pins
Page 55 of 68