PACVGA105 Datasheet, PDF (5/6 Pages) California Micro Devices Corp – VGA Port Companion Circuit

Application Information
PACVGA105
H-Sync
V-Sync
DDC_Data
DDC_Clk
Red
Grn
Blue
VF** - VIDEO EMI Filter
SF** - SYNC EMI Filter
To Video
DAC V_DD ^5V
3.3V
0.2uF
0.2uF
4
V_RGB
9,16
V_CC
13
V_AUX
2 _HSYNC
14 _VSYNC
10 _{DDC_DATA}
12 _{DDC_CLK}
8
GNDA
GNDD ^{3, 11}
DIGITAL ANALOG
PACVGA105
GND GND
HSYNC_OUT ¹
VSYNC_OUT ¹⁵
7_R
6_G
5_B
H-Sync
V-Sync
DDC_Data
DDC_Clk
Red
Green
Blue
Figure 1. Typical Connection Diagram
GNDA, the negative voltage rail for the R, G and B diodes is not connected internally to GNDD. GNDA should ide-
ally be connected to the ground of the video DAC IC. This will prevent any ground bounce caused by digital signals
from injecting noise onto the R, G and B signals. Analog GND and digital GND are typically connected on the
printed circuit board.
© 2004 California Micro Devices Corp. All rights reserved.
01/28/04 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 L Tel: [phone] L Fax: [phone] L www.calmicro.com
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