19-2987; Rev 0; 9/03
225MHz, Triple, 2-Channel Video
Multiplexer-Amplifier
General Description
The MAX4027 is a triple, wideband, 2-channel, nonin-
verting gain-of-two video amplifier with input multiplex-
ing, capable of driving up to two back-terminated video
loads. The MAX4027 features current-mode feedback
amplifiers configured for a gain of two (+6dB) with a
-3dB large-signal bandwidth of 200MHz. The device
has low (0.012%/0.014°) differential gain and phase
errors, and operates from ±5V supplies.
The MAX4027 is ideal for use in broadcast and graph-
ics video systems because of the low 2pF input capaci-
tance, channel-to-channel switching time of only 15ns,
and wide 62MHz, large-signal 0.1dB bandwidth. High-
impedance output disabling allows the MAX4027 to be
incorporated into large switching arrays with minimal
interaction with the source. Specified over the -40°C to
+85°C extended temperature range, the MAX4027 is
available in 14-pin SO and TSSOP packages.
Features
o
Excellent Video Specifications:
75MHz Small-Signal 0.1dB Gain Flatness
62MHz Large-Signal 0.1dB Gain Flatness
0.012%/0.014° Differential Gain/Phase Error
o
VGA to UXGA Resolution
o
High Speed:
200MHz 2V
P-P
-3dB Bandwidth
1100V/µs Slew Rate
15ns Settling Time to 0.1%
o
Internal Gain of 2V/V Compensates for Output
Back Termination
o
Fast Switching:
15ns Channel-Switching Time
260mV
P-P
Switching Transient
o
Drives Two Back-Terminated Video Loads
o
High-Impedance Output Disable
MAX4027
Applications
Video Source Selection (Multiplexing)
Picture in Picture (PIP) Insertion
Crosspoint Expansion
Coaxial Cable Drivers
Supports VGA to UXGA (1600 x 1200) Resolution
Enterprise Class (Blade) Servers
Keyboard-Video-Mouse (KVM)
Ordering Information
PART
MAX4027ESD
MAX4027EUD
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
14 SO
14 TSSOP
Typical Operating Circuit
TOP VIEW
MAX4027
VIDEO R
SOURCE G
1
B
x2
IN1A
IN2A
IN3A
IN1B
IN2B
IN3B
OUT1
R
IN1A 1
IN2A
TRIPLE
2:1
MUX
IN3A
x2
OUT2
G
2
3
Pin Configuration
14 A/B
13 OUT1
12 V
CC
GND 4
IN1B 5
MAX4027
11 OUT2
10 V
EE
9
8
OUT3
EN
VIDEO R
SOURCE G
2
B
x2
OUT3
B
IN2B 6
IN3B 7
SO/TSSOP
A/B
EN
________________________________________________________________
Maxim Integrated Products
1
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.
225MHz, Triple, 2-Channel Video
Multiplexer-Amplifier
MAX4027
ABSOLUTE MAXIMUM RATINGS
Positive Supply Voltage (V
CC
to GND) ..................................+6V
Negative Supply Voltage (V
EE
to GND) ..................................-6V
Amplifier Input Voltage (IN_ _) .........(V
EE
- 0.3V) to (V
CC
+ 0.3V)
Digital Input Voltage (EN,
A/B)
...................-0.3V to (V
CC
+ 0.3V)
Output Short Circuit to GND (Note 1).........................Continuous
Output Short Circuit to V
CC
or V
EE
...........................................5s
Note 1:
Continuous power-dissipation rating must also be observed.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Continuous Power Dissipation (T
A
= +70°C)
14-Pin TSSOP (derate 9.1mW/°C above +70°C) .........727mW
14-Pin SO (derate 8.3mW/°C above +70°C)................667mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature .....................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
DC ELECTRICAL CHARACTERISTICS
(V
CC
= 5V, V
EE
= -5V, V
IN_ _
= 0V, R
L
= 150Ω to GND, T
A
= -40°C to +85°C. Typical values are at T
A
= +25°C.) (Note 2)
PARAMETER
Operating Supply Voltage Range
Positive Supply Current
Negative Supply Current
Input Voltage Range
Input Offset Voltage
Input Offset-Voltage Matching
Voltage Gain
Input Offset-Voltage Temperature
Coefficient
Input Bias Current
Input Resistance
DC Output Resistance
Disabled Output Resistance
DC Power-Supply Rejection Ratio
Output Voltage Swing
Output Short-Circuit Current
LOGIC CHARACTERISTICS (EN,
A/B)
Logic-Low Threshold
Logic-High Threshold
Logic-Low Input Current
Logic-High Input Current
V
IL
V
IH
I
IL
I
IH
V
IL
= 0V
V
IH
= +5.5V, V
CC
= +5.5V
2.0
-4
350
-20
600
0.8
V
V
µA
µA
SYMBOL
V
CC
V
EE
I
CC
I
EE
V
IN_ _
V
OS
∆V
OS
A
V
TCV
OS
I
B
R
IN
R
OUT
R
OUT(d)
PSRR
V
OUT_
I
SC
EN
= 5V, V
OUT_
= -2.5V to +2.5V (Note 3)
V
CC
= +4.5V to +5.5V, V
EE
= -4.5V to -5.5V
60
±2.5
T
A
= +25°C
T
A
= -40°C to +85°C
V
IN_ _
= -1.25V to
+1.25V
Channel on
Channel off
100
1
400
20
10
1.6
86
±3.5
±143
CONDITIONS
Inferred from the PSRR test
EN
= GND
EN
= 5V
EN
= GND
EN
= 5V
Inferred from voltage gain
T
A
= +25°C
T
A
= -40°C to +85°C
Channel to channel
V
OUT_
= ±2.5V
1.9
±1
2.0
1
±2
±10
±18
±1.25
MIN
+4.5
-4.5
TYP
+5.0
-5.0
31
17
28
15
±1.75
±1
±6
±11
±12
2.1
MAX
+5.5
-5.5
39
24
36
21
UNITS
V
mA
mA
V
mV
mV
V/V
µV/°C
µA
kΩ
MΩ
mΩ
kΩ
dB
V
mA
2
_______________________________________________________________________________________
225MHz, Triple, 2-Channel Video
Multiplexer-Amplifier
AC ELECTRICAL CHARACTERISTICS
(V
CC
= 5V, V
EE
= -5V, V
IN_ _
= 0V, R
IN
= 75Ω to GND, R
L
= 150Ω to GND, T
A
= +25°C, unless otherwise noted.)
PARAMETER
AMPLIFIER CHARACTERISTICS
Small-Signal -3dB Bandwidth
Small-Signal Bandwidth for
±0.1dB Gain Flatness
Large-Signal -3dB Bandwidth
Large-Signal Bandwidth for
±0.1dB Gain Flatness
Slew Rate
Settling Time to 0.1%
Differential Gain Error
Differential Phase Error
Delay Between Channels
Channel-to-Channel Crosstalk
A/B
Crosstalk
Output Impedance
Total Harmonic Distortion
Off-Isolation
Output Capacitance
Input Capacitance
Input-Voltage Noise Density
Input-Current Noise Density
SWITCHING CHARACTERISTICS
Channel-Switching Time
Enable Delay Time
Disable Delay Time
Switching Transient
t
SW
t
PDE
t
PDD
V
TRAN
(Notes 5, 6)
(Notes 5, 7)
(Notes 5, 7)
(Note 8)
15
20
25
260
ns
ns
ns
mV
P-P
Z
OUT
THD
A
ISO
C
OUT
C
IN
e
n
i
n
BW
SS
V
IN_ _
= 20mV
P-P
225
75
200
62
1100
15
0.012
0.014
0.1
-61
-80
1
64
-83
3
2
6.5
6.5
MHz
MHz
MHz
MHz
V/µs
ns
%
degrees
ns
dB
dB
Ω
dBc
dB
pF
pF
nV/√Hz
pA/√Hz
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX4027
BW
LS(0.1)
V
IN_ _
= 20mV
P-P
BW
LS
V
IN_ _
= 1V
P-P
BW
LS(0.1)
V
IN_ _
= 1V
P-P
SR
t
S
DG
DP
t
D
X
TALK
V
IN_ _
= 1V
P-P
V
IN_ _
= 1V
P-P
5-step modulated staircase (Note 4)
5-step modulated staircase (Note 4)
V
IN_ _
= 1V
P-P
, t
R
= 100ps
V
IN_ _
= ±1V
P-P
, f = 10MHz
V
IN_ _
= ±1V
P-P
, f = 10MHz
f = 10MHz
V
OUT_
= 2V
P-P
, f = 10MHz
V
OUT_
= 2V
P-P
, f = 10MHz, R
S
= 75Ω
Channel on or off
Channel on or off
f = 100kHz
f = 100kHz
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
Limits are 100% production tested at T
A
= +25°C. Limits over the operating temperature range are guaranteed by design.
Disabled output resistance includes the internal feedback network.
Input test signal is NTSC composite with 5-step staircase, of 40 IRE per step, modulated with 3.58MHz color subcarrier.
See the Timing Diagram (Figure 2).
Channel-switching time specified for switching between input channels; does not include signal rise/fall times for switching
between channels with different input voltages.
Note 7:
Output enable/disable delay times do not include amplifier output slewing times.
Note 8:
Switching transient measured while switching between two grounded channels.
_______________________________________________________________________________________
3
225MHz, Triple, 2-Channel Video
Multiplexer-Amplifier
MAX4027
Typical Operating Characteristics
(V
CC
= +5V, V
EE
= -5V, R
L
= 150Ω to GND, T
A
= +25°C, unless otherwise noted.)
SMALL-SIGNAL GAIN FLATNESS
vs. FREQUENCY
MAX4027 toc01
MAX4027 toc02
SMALL-SIGNAL FREQUENCY RESPONSE
3
2
1
0
GAIN (dB)
GAIN (dB)
-1
-2
-3
-4
-5
-6
-7
1M
10M
100M
1G
FREQUENCY (Hz)
V
IN_ _
= 20mV
P-P
A
V
= +2V/V
0.3
0.2
0.1
0
LARGE-SIGNAL FREQUENCY RESPONSE
2
1
0
GAIN (dB)
-1
-2
-3
-4
-5
-6
-7
V
OUT_
= 4V
P-P
V
OUT_
= 2V
P-P
A
V
= +2V/V
MAX4027 toc03
3
V
IN_ _
= 20mV
P-P
A
V
= +2V/V
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
-0.7
1M
10M
100M
1G
FREQUENCY (Hz)
1M
10M
100M
1G
FREQUENCY (Hz)
DIFFERENTIAL GAIN (%)
LARGE-SIGNAL GAIN FLATNESS
vs. FREQUENCY
MAX4027 toc04
CHANNEL-TO-CHANNEL GAIN MATCHING
vs. FREQUENCY
CHANNEL-TO-CHANNEL GAIN MATCHING (dB)
0.4
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
1M
10M
FREQUENCY (Hz)
100M
V
OUT_
= 2V
P-P
MAX4027 toc05
DIFFERENTIAL GAIN AND PHASE
0.010
0
-0.010
-0.020
1st
0.020
0.010
0
-0.010
-0.020
1st
2nd
3rd
4th
5th
6th
2nd
3rd
4th
5th
6th
MAX4027 toc06
0.3
0.2
0.1
0
GAIN (dB)
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
-0.7
1M
10M
100M
V
OUT_
= 4V
P-P
V
OUT_
= 2V
P-P
A
V
= +2V/V
0.5
0.020
1G
FREQUENCY (Hz)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX4027 toc07
DIFFERENTIAL PHASE (DEG)
OFF-ISOLATION vs. FREQUENCY
MAX4027 toc08
CHANNEL-TO-CHANNEL CROSSTALK
vs. FREQUENCY
-10
-20
CROSSTALK (dB)
MAX4027 toc09
-20
-25
-30
-35
PSRR (dB)
-40
-45
PSRR-
-50
-55
-60
-65
100k
1M
10M
0
-20
OFF-ISOLATION (dB)
-40
-60
-80
-100
0
-30
-40
-50
-60
-70
-80
PSRR+
-120
100M
1M
10M
100M
1G
FREQUENCY (Hz)
FREQUENCY (Hz)
100k
1M
10M
FREQUENCY (Hz)
100M
1G
4
_______________________________________________________________________________________
225MHz, Triple, 2-Channel Video
Multiplexer-Amplifier
Typical Operating Characteristics (continued)
(V
CC
= +5V, V
EE
= -5V, R
L
= 150Ω to GND, T
A
= +25°C, unless otherwise noted.)
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
MAX4027 toc11
MAX4027
A/B CROSSTALK vs. FREQUENCY
MAX4027 toc10
OUTPUT IMPEDANCE vs. FREQUENCY
100
-20
V
OUT_
= 2V
P-P
-30
-40
THD (dBc)
-50
-60
-70
-80
-20
CROSSTALK (dB)
-40
-60
-80
-100
-120
100k
1M
10M
FREQUENCY (Hz)
100M
OUTPUT IMPEDANCE (Ω)
10
1
0.1
0.01
1G
100k
1M
10M
FREQUENCY (Hz)
100M
1G
-90
1M
10M
FREQUENCY (Hz)
100M
LARGE-SIGNAL PULSE RESPONSE
MAX4027 toc13
SMALL-SIGNAL PULSE RESPONSE
MAX4027 toc14
LARGE-SIGNAL PULSE RESPONSE
(C
LOAD
= 20pF)
MAX4027 toc15
V
IN_ _
500mV/div
0V
V
IN_ _
50mV/div
0V
V
IN_ _
500mV/div
0V
V
OUT_
1V/div
0V
V
OUT_
100mV/div
0V
V
OUT_
1V/div
0V
10ns/div
10ns/div
10ns/div
SMALL-SIGNAL PULSE RESPONSE
(C
LOAD
= 20pF)
ENABLE RESPONSE TIME
MAX4027 toc17
A/B SWITCHING TRANSIENT
MAX4027 toc18
MAX4027 toc16
V
IN_ _
50mV/div
0V
EN
2.5V/div
0V
A/B
2.5V/div
0V
V
OUT_
100mV/div
0V
V
OUT_
1V/div
0V
V
OUT_
100mV/div
MAX4027 toc12
0
0V
10ns/div
20ns/div
20ns/div
_______________________________________________________________________________________
5
京公网安备 11010802033920号
EEWORLD
