pacvga105q California Micro Devices Corporation, pacvga105q Datasheet - Page 5

• Manufacturer Part Number: pacvga105q
• Description: Vga Port Companion Circuit
• Manufacturer: California Micro Devices Corporation

01/28/04
Application Information
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.
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
VF** - VIDEO EMI Filter
SF** - SYNC EMI Filter
DDC_Data
DDC_Clk
H-Sync
V-Sync
Blue
Red
Grn
Figure 1. Typical Connection Diagram
14
10
12
2
7
6
5
HSYNC
VSYNC
DDC_DATA
DDC_CLK
R
G
B
L Tel: [phone]
DAC V
To Video
V
4
RGB
0.2uF
PACVGA105
DD
0.2uF
9,16
V
5V
CC
HSYNC_OUT
VSYNC_OUT
13
3.3V
V
AUX
GNDD
GNDA
L
Fax: [phone]
8
3, 11
1
15
DIGITAL
GND
ANALOG
GND
L
PACVGA105
www.calmicro.com
H-Sync
V-Sync
DDC_Data
DDC_Clk
Red
Green
Blue
5