Pll Power Supply Pins; Recommended Configuration Of Filter; Figure 4.1 Recommended Configuration Of Filter - Renesas R-IN32M4-CL3 User Manual

R-IN32M4-CL3 User's Manual: Board design edition
4.

PLL Power Supply Pins

The PLL circuit is susceptible to noise. To reduce the influence of noise, it is recommended to place filters in the power
supply pins of the PLL. In addition, to reduce the effects of noise between the power supplies for the board and PLL, the
use of ferrite beads is recommended.
4.1

Recommended Configuration of Filter

Figure 4.1 shows the recommended configuration of the filter for the PLL power supply pins.
VDD11 (1.15 V)
C1: 0.1-µF ceramic capacitor
C2: ³ 4.7-µF capacitor
FB: Impedance: 600 Ω at 100 MHz / DC resistance component: 0.3 Ω or below
Reference ferrite beads: TDK MPZ2012S601A, MPZ1608S601A

Figure 4.1 Recommended Configuration of Filter

Caution: Place C1 immediately close to R-IN32M4-CL3.
If C2 is not placed immediately close to R-IN32M4-CL3, this will not cause any problems.
R18UZ0074EJ0100
Dec 24, 2019
FB
C2
FB
R-IN32M4-CL3
PLL_VDD
PLL
C1
PLL_GND
4. PLL Power Supply Pins
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