Datasheet

MAX7428/MAX7430/MAX7432A
Standard Definition Video Reconstruction
Filters and Buffers
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Set the clamping levels for component video so the
MAX7428 processing Y clamps at +1V (CLEVEL = 0).
The remaining two MAX7428s should have clamp levels
set to +1.5V (CLEVEL = 1). For RGB video with external
sync (H), all three MAX7428s should have clamp levels
set to +1V (CLEVEL = 0).
Power-Supply Bypassing and Layout
The MAX7428/MAX7430/MAX7432A operate from a sin-
gle +5V supply. Bypass V
CC
to GND with a 0.1µF
capacitor. Place all external components as close to
the devices as possible. Refer to the MAX7428EVKIT
for a proven PC board layout example.
INA
(CLEVEL = 0)
OUTY (LUMA)
SYNCIO
MAX7428
INA
(CLEVEL = 1)
OUTC (CHROMA)
SYNCIO
MAX7428
Figure 11. Y/C Video Filter Application
MAX7430
IN1A
OUT2
OUT1
IN2A
[CLEVEL = 0]
[CLEVEL = 1]
Y (LUMA)
C (CHROMA)
Figure 10. MAX7430 Y/C Video Filter Application
B
R
G
(MUST CONTAIN
SYNC SIGNAL)
MAX7432
IN1A
OUT2
OUT1
IN2A
[CLEVEL = 0]
[CLEVEL = 0]
OUT3
IN3A
[CLEVEL = 0]
Figure 13. MAX7432A RGB Video Filter with Embedded Sync
Application
P
r
P
b
Y (LUMA)
(INCLUDES
SYNC SIGNAL)
MAX7432
IN1A
OUT2
OUT1
IN2A
[CLEVEL = 0]
[CLEVEL = 1]
OUT2
IN3A
[CLEVEL = 1]
Figure 12. MAX7432A Y P
b
P
r
Video Filter Application