ADV7125 Analog Devices, ADV7125 Datasheet - Page 14

• Manufacturer Part Number: ADV7125
• Description: 330MHz Triple 8-Bit High Speed Video DAC
• Manufacturer: Analog Devices

Specifications of ADV7125

• Resolution (bits): 8bit
• Dac Update Rate: 330MSPS
• Dac Settling Time: n/a
• Max Pos Supply (v): +5.25V
• Single-supply: No
• Dac Type: Current Out
• Dac Input Format: Par

ADV7125
ANALOG SIGNAL INTERCONNECT
Place the ADV7125 as close as possible to the output connectors,
thus minimizing noise pickup and reflections due to impedance
mismatch.
The video output signals should overlay the ground plane and
not the analog power plane, thereby maximizing the high
frequency power supply rejection.
INPUTS
VIDEO
DATA
V
AA
41 TO 48
16 TO 23
3 TO 10
0.1µF
35
12
11
24
38
R7 TO R0
G7 TO G0
B7 TO B0
COMP
SYNC
BLANK
CLOCK
PSAVE
ADV7125
GND
1, 2, 14, 15,
25, 26, 39, 40
V
R
V
IOR
IOG
IOB
IOR
IOG
IOB
REF
SET
AA
Figure 10. Typical Connection Diagram
36
37
34
32
28
33
31
27
13, 29,
30
POWER SUPPLY DECOUPLING
(0.1µF AND 0.01µF CAPACITOR
FOR EACH V
75Ω
AD1580
COMPLEMENTARY
OUTPUTS
Rev. C | Page 14 of 16
R
530Ω
SET
75Ω
0.1µF
1
2
AA
GROUP
75Ω
COAXIAL CABLE
For optimum performance, the analog outputs should each
have a source termination resistance to ground of 75 Ω (doubly
terminated 75 Ω configuration). This termination resistance
should be as close as possible to the ADV7125 to minimize
reflections.
Additional information on PCB design is available in the
AN-333 Application Note, Design and Layout of a Video
Graphics System for Reduced EMI, which is available from
Analog Devices at www.analog.com.
0.01µF
1µF
1kΩ
)
75Ω
V
CONNECTORS
AA
V
AA
BNC
75Ω
75Ω
75Ω
MONITOR (CRT)