Datasheet

MAX7428/MAX7430/MAX7432A
Standard Definition Video Reconstruction
Filters and Buffers
_______________________________________________________________________________________ 5
0.1 1 10
OUTPUT IMPEDANCE vs. FREQUENCY
MAX7428/30/32 toc10
FREQUENCY (MHz)
IMPEDANCE (Ω)
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
200ns/div
OUTPUT TRANSIENT DUE TO
INPUT MUX SWITCHING
OUT_
500mV/div
MAX7428/30/32 toc11
-70
-95
0.1 1 10
PASSBAND CHANNEL-TO-CHANNEL
CROSSTALK vs. FREQUENCY
-90
MAX7428/30/32 toc12
FREQUENCY (MHz)
CROSSTALK (dB)
-85
-80
-75
BOOST = CODE 00
Typical Operating Characteristics (continued)
(V
CC
= +5V, R
REXT
= 300kΩ; BOOST0_, BOOST1_ = 0, 0; V
IN
= 1Vp-p, T
A
= +25°C, unless otherwise noted.)
Pin Description
PIN
MAX7432A
MAX7430 MAX7428
NAME FUNCTION
1 1 — IN1A
Video Input 1A. Master channel, sync signal required. Use a 0.1µF
series input capacitor for proper operation.
2 2 — IN2A
Video Input 2A. Slave channel, clamping controlled by master channel
sync. Use a 0.1µF series input capacitor for proper operation.
3 — — IN3A
Video Input 3A. Slave channel, clamping controlled by master channel
sync. Use a 0.1µF series input capacitor for proper operation.
4, 10 8 4 GND Ground
5 4 — IN1B
Video Input 1B. Master channel, sync signal required. Use a 0.1µF
series input capacitor for proper operation.
6 5 — IN2B
Video Input 2B. Slave channel, clamping controlled by master channel
sync. Use a 0.1µF series input capacitor for proper operation.
7 — — IN3B
Video Input 3B. Slave channel, clamping controlled by master channel
sync. Use a 0.1µF series input capacitor for proper operation.
8 6 6 DATA Serial Data Interface
9 — — OUT3 Buffer Output 3
11 7 — OUT2 Buffer Output 2
12 3 7 REXT
External Resistor. Connect a 300kΩ resistor from REXT to GND for
internal biasing. Connect a 1nF to 1µF capacitor from REXT to GND for
chip-address programming (see Table 3).