MAX4028 Datasheet, PDF (1/13 Pages) Maxim Integrated Products – Triple/Quad, 2:1 Video Multiplexer-Amplifiers with Input Clamps

19-3240; Rev 0; 3/04
Triple/Quad, 2:1 Video
Multiplexer-Amplifiers with Input Clamps
General Description
The MAX4028/MAX4029 are 5V, triple/quad, 2:1 voltage-
feedback multiplexer-amplifiers with input clamps and a
fixed gain of +2V/V (6dB). Channel 1 (IN1A and IN1B)
inputs are clamped to the video sync tip of the input sig-
nal, while the remaining inputs can be clamped to either
the video sync tip or the video sync of channel 1 (IN1_).
The latter is referred to as a key clamp and is pin selec-
table. Selectable clamp/key-clamp inputs and fixed-gain
video output buffers make the MAX4028/MAX4029 ideal
for video-source switching applications such as automo-
tive entertainment systems, video projectors, and dis-
plays/TVs. Both devices have 20ns channel switching
times and low ±10mV_P-P switching transients, making
them ideal for high-speed video switching applications
such as on-screen display (OSD) insertion.
The MAX4028/MAX4029 have a -3dB large-signal (2V_P-P)
bandwidth of 130MHz, a -3dB small-signal bandwidth of
210MHz, and a 300V/µs slew rate. Low differential gain
and phase errors of 0.2% and 0.4°, respectively, make
these devices ideal for broadcast video applications.
The MAX4028/MAX4029 are specified over the -40°C to
+85°C extended temperature range and are offered in
16-pin and 20-pin TSSOP/SO packages.
Applications
In-Car Navigation/Entertainment
Blade Servers
Security Systems
Video Projectors
Displays and Digital Televisions
Broadcast and Graphics Video
Set-Top Boxes
Notebook Computers
Video Crosspoint Switching
PART
MAX4028
MAX4029
Selector Guide
NO. OF 2:1
MUX-AMPS
3
4
GAIN
2V/V
2V/V
Features
o Single +5V Operation
o Independently Selectable Sync-Tip or
Key-Clamp Inputs
o Adjustable Key-Clamp Voltage
o 130MHz Large-Signal -3dB Bandwidth
o 210MHz Small-Signal -3dB Bandwidth
o 300V/µs Slew Rate
o 20ns Switching Time
o Ultra-Low ±10mV_P-P Switching Transient
o 0.2% Differential Gain/0.4° Phase Error
o Low-Power, High-Impedance Disable Mode
PART
MAX4028EUE
MAX4028EWE
MAX4029EUP
MAX4029EWP
Ordering Information
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
16 TSSOP
16 Wide SO
20 TSSOP
20 Wide SO
Typical Operating Circuit
75Ω CABLE
75Ω
75Ω CABLE
75Ω
75Ω CABLE
75Ω
75Ω CABLE
75Ω
CIN
0.1µF
IN1A
CLAMP
CIN
0.1µF
IN1B
CLAMP
CIN
0.1µF
IN2A
CLAMP
CIN
0.1µF
IN2B
CLAMP
RKEYREF
6kΩ
KEYREF
A/B
MAX4028
MAX4029
1kΩ
1kΩ
1kΩ
1kΩ
KEY/CLAMP
CONTROL
VCC
0.1µF
+5V
0.01µF
OUT1 ^{75Ω 75Ω CABLE}
OUT2 ^{75Ω 75Ω CABLE}
DISABLE
CLAMP/KEY_2
Pin Configurations appear at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
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