MAX4029 Maxim, MAX4029 Datasheet

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MAX4029

Manufacturer Part Number
MAX4029
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)
Manufacturer
Maxim
Datasheet

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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
them ideal for high-speed video switching applications
such as on-screen display (OSD) insertion.
The MAX4028/MAX4029 have a -3dB large-signal (2V
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.
19-3240; Rev 0; 3/04
Pin Configurations appear at end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
MAX4028
MAX4029
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
Multiplexer-Amplifiers with Input Clamps
________________________________________________________________ Maxim Integrated Products
P-P
MUX-AMPS
NO. OF 2:1
General Description
switching transients, making
3
4
Selector Guide
Applications
GAIN
2V/V
2V/V
P-P
)
♦ Single +5V Operation
♦ Independently Selectable Sync-Tip or
♦ Adjustable Key-Clamp Voltage
♦ 130MHz Large-Signal -3dB Bandwidth
♦ 210MHz Small-Signal -3dB Bandwidth
♦ 300V/µs Slew Rate
♦ 20ns Switching Time
♦ Ultra-Low ±10mV
♦ 0.2% Differential Gain/0.4° Phase Error
♦ Low-Power, High-Impedance Disable Mode
MAX4028EUE
MAX4028EWE
MAX4029EUP
MAX4029EWP
75Ω CABLE
75Ω CABLE
75Ω CABLE
75Ω CABLE
Triple/Quad, 2:1 Video
Key-Clamp Inputs
R
KEYREF
PART
75Ω
75Ω
75Ω
75Ω
6kΩ
0.1µF
0.1µF
0.1µF
0.1µF
C
C
C
C
IN
IN
IN
IN
IN1A
IN1B
IN2A
KEYREF
Typical Operating Circuit
IN2B
CLAMP
CLAMP
CLAMP
CLAMP
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
P-P
Ordering Information
A/B
KEY/CLAMP
Switching Transient
CONTROL
1kΩ
1kΩ
MAX4028
MAX4029
1kΩ
1kΩ
V
CC
16 TSSOP
16 Wide SO
20 TSSOP
20 Wide SO
PIN-PACKAGE
0.1µF
OUT1
OUT2
Features
DISABLE
CLAMP/KEY_2
75Ω
75Ω
+5V
75Ω CABLE
75Ω CABLE
0.01µF
1

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MAX4029 Summary of contents

Page 1

... 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. ...

Page 2

... Lead Temperature (soldering, 10s) .................................+300°C = +5V 6kΩ, C DISABLE KEYREF IN CONDITIONS V Guaranteed by PSRR CC = ∞ MAX4028 ∞ MAX4029 MAX4028 DISABLE MAX4029 Clamp (Note 3) V CLAMP Key clamp (Note 4) I Input voltage = input clamp + 0.5V IN Measured at output CLAMP Measured at output ...

Page 3

Multiplexer-Amplifiers with Input Clamps AC ELECTRICAL CHARACTERISTICS (V = +5V, GND = 0V 150Ω to GND Typical values are +25°C.) A PARAMETER Small-Signal -3dB Bandwidth Large-Signal -3dB Bandwidth Small-Signal 0.1dB Gain Flatness ...

Page 4

Triple/Quad, 2:1 Video Multiplexer-Amplifiers with Input Clamps (V = +5V, GND = 0V +5V, R DISABLE CC noted.) SMALL-SIGNAL BANDWIDTH vs. FREQUENCY 100mV OUT P ...

Page 5

Multiplexer-Amplifiers with Input Clamps (V = +5V, GND = 0V, V DISABLE CC noted.) OUTPUT IMPEDANCE vs. FREQUENCY 100 10 1 0.1 10k 100k 1M 10M 100M FREQUENCY (Hz) SMALL-SIGNAL TRANSIENT RESPONSE MAX4028 toc13 V IN 25mV/div SIGNAL 2 50mV/div ...

Page 6

... Triple/Quad, 2:1 Video Multiplexer-Amplifiers with Input Clamps (V = +5V, GND = 0V +5V, R DISABLE CC noted.) CLAMP VOLTAGE vs. TEMPERATURE 0.43 0.42 0.41 0.40 0.39 0.38 0.37 -50 - TEMPERATURE (°C) PIN NAME MAX4028 MAX4029 — 1 IN4A 1 2 IN3A 2 3 IN2A 3 4 IN1A KEYREF 6 7 IN1B 7 8 IN2B 8 9 IN3B — ...

Page 7

... The MAX4028/MAX4029 have AC-coupled inputs, with either a sync tip or key clamp to provide bias for the video signal. Channel 1 of the MAX4028/MAX4029 always has a sync tip clamp at the input, while the remaining channels are selectable as either sync tip or ...

Page 8

... Clamp/Key-Clamp Settings for Video Formats section. Clamp/Key-Clamp Settings for Video Formats Tables 1 and 2 provide the clamp settings on the MAX4028/MAX4029 to interface with various video formats. Low-Power, High-Impedance Disable Mode All parts feature a low-power, high-impedance disable mode that is activated by driving the DISABLE input low ...

Page 9

... Cvbs 4 Cvbs The MAX4028/MAX4029 have a fixed gain of +2V/V that is internally set with two 1kΩ thin-film resistors. The impedance of the internal feedback resistors must be taken into account when operating multiple MAX4028/ MAX4029s in large multiplexer applications. Applications Information Video Line Driver The MAX4028/MAX4029 are well suited to drive coaxial ...

Page 10

... MAX4028 MAX4029 Figure 5. Using an Isolation Resistor (R ISO ) for a High- Capacitive Load Although the MAX4028/MAX4029 are optimized for AC performance and are not designed to drive highly capacitive loads, they are capable of driving up to 15pF without oscillations. However, some peaking may occur in the frequency domain (Figure 4). To drive larg- er capacitive loads or to reduce ringing, add an isola- tion resistor between the amplifier’ ...

Page 11

... IN2A 15 OUT1 IN1A OUT2 KEYREF 12 CLAMP/KEY_2 IN1B 11 OUT3 IN2B 10 GND IN3B 9 CLAMP/KEY_3 IN4B pin. To minimize CC Pin Configurations 1 20 CLAMP/KEY_4 2 19 DISABLE 3 18 OUT1 MAX4029 A OUT2 6 15 CLAMP/KEY_2 7 14 OUT3 8 13 GND 9 12 CLAMP/KEY_3 10 11 OUT4 TSSOP/SO 11 ...

Page 12

... Triple/Quad, 2:1 Video Multiplexer-Amplifiers with Input Clamps (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) 12 ______________________________________________________________________________________ Package Information PACKAGE OUTLINE, TSSOP 4.40mm BODY 1 21-0066 I 1 ...

Page 13

... A1 FRONT VIEW Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 13 © ...

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