19-4457; Rev 0; 2/09
Quadruple, 2:1, Mux Amplifiers for
Standard-Definition and VGA Signals
General Description
The MAX9541/MAX9542 are quadruple-channel, 2:1
video mux amplifiers with input sync tip clamps. These
devices select between two video sources and support
up to four channels on each source. The MAX9541 has
integrated lowpass filters that are optimized for standard-
definition video signals such as composite and red,
green, blue (RGB). The filters typically have ±1dB pass-
band flatness out to 9.5MHz and 47dB attenuation at
27MHz. The MAX9542 has a wider bandwidth of 15MHz
because it does not have integrated lowpass filters, mak-
ing it suitable for not only standard-definition video sig-
nals, but also video graphics array (VGA) signals with a
640 x 480 resolution at up to 85Hz refresh rate.
Video signals are AC-coupled to the inputs of the
MAX9541/MAX9542. The input sync-tip clamps set the
internal DC level.
The amplifiers have 2V/V gain, and the outputs can be
DC-coupled to a 75Ω load, which is the equivalent of two
video loads, or AC-coupled to a 150Ω load.
Both the MAX9541/MAX9542 feature a low-power shut-
down mode, in which supply current is reduced to 35µA.
♦
Quad 2:1 Video Mux Amplifiers
♦
Reconstruction Filters with 9.5MHz Passband and
47dB Attenuation at 27MHz (MAX9541)
♦
Fixed Gain of 2V/V
♦
Input Sync-Tip Clamps
♦
Shutdown
♦
2.7V to 3.6V Single-Supply Operation
Features
MAX9541/MAX9542
Ordering Information
PART
MAX9541AEE+
MAX9542AEE+
PIN-PACKAGE
16 QSOP
16 QSOP
STANDARD-
DEFINITION
VIDEO FILTER
Yes
No
Note:
All devices are specified over the -40°C to +125°C oper-
ating temperature range.
+Denotes
a lead(Pb)-free/RoHS-compliant package.
Applications
Automotive Infotainment
Functional Diagram
V
DD
SHDN
A/B
0
IN0A
LPF*
1
IN1A
UNKNOWN
BIAS
IN2A
IN3A
1
CLAMPREF
0
IN0B
1
IN1B
CLAMPREF
0
IN2B
1
IN3B
CLAMPREF
LPF*
2V/V
OUT3
LPF*
2V/V
OUT2
LPF*
2V/V
CLAMPREF
0
OUT1
300mV
MAX9541
MAX9542
2V/V
OUT0
GND
*LOWPASS FILTER IN MAX9541 ONLY.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Quadruple, 2:1, Mux Amplifiers for
Standard-Definition and VGA Signals
MAX9541/MAX9542
ABSOLUTE MAXIMUM RATINGS
Supply Voltage
V
DD
to GND ..........................................................-0.3V to +4V
Input Pins,
SHDN, A/B
.............................(GND - 0.3V) to +4V
Duration of Output Short Circuit to V
DD
or GND ........Continuous
Continuous Input Current
Input Pins......................................................................±20mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin QSOP (derate 8.3mW/°C above +70°C)...........667mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
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.
ELECTRICAL CHARACTERISTICS
(V
DD
= 3.3V, V
GND
= 0,
SHDN
= V
DD
,
A/B
= V
DD
, R
L
= 150Ω to GND, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are
at T
A
= +25°C.) (Note 1)
PARAMETER
Supply Voltage Range
Quiescent Supply Current
Shutdown Supply Current
Input Voltage
Input Resistance
Sync-Tip Clamp Level
Input Voltage Range
V
CLP
Guaranteed by DC
voltage gain
2.7V
≤
V
DD
≤
3.6V
3.0V
≤
V
DD
≤
3.6V
Sync-tip clamp; percentage reduction in
sync pulse (0.3V
P-P
); guaranteed by input
clamping current measurement
1
300
V
DD
= 2.7V,
0V
≤
V
IN
≤
1.05V
V
DD
= 3V,
0V
≤
V
IN
≤
1.2V
1.96
1.96
-2
0.218
0.3
2.1
2.1
2.4
2.4
2.1
140
70
0.2
mA
Ω
V
P-P
2
2
2.04
V/V
2.04
+2
0.39
%
V
SYMBOL
V
DD
I
DD
I
SHDN
No load
SHDN
=
A/B=
GND
Unselected input
Unselected input
0.23
CONDITIONS
Guaranteed by power-supply rejection test
MIN
2.7
TYP
3.3
21
35
V
DD
/3
222
0.3
0.39
1.05
1.2
2
2
MAX
3.6
45
70
UNITS
V
mA
μA
V
kΩ
V
V
P-P
Sync Crush
Input Clamping Current
Maximum Input Source
Resistance
%
µA
Ω
DC Voltage Gain (Note 2)
A
V
R
L
= 150Ω to GND
(Note 2)
DC Gain Mismatch
Output Level
Guaranteed by DC voltage gain
Measured at V
OUT
, C
IN_
= 0.1µF to GND
Measured at output, V
DD
= 2.7V, V
IN
=
V
CLP
to (V
CLP
+1.05V), R
L
= 150Ω to -0.2V
Measured at output, V
DD
= 2.7V, V
IN
=
V
CLP
to (V
CLP
+1.05V), R
L
= 150Ω to V
DD
/2
Output Voltage Swing
Measured at output, V
DD
= 3.0V, V
IN
=
V
CLP
to (V
CLP
+1.2V), R
L
= 150Ω to -0.2V
Measured at output, V
DD
= 3.0V, V
IN
=
V
CLP
to (V
CLP
+1.2V), R
L
= 150Ω to V
DD
/2
Measured at output, V
DD
= 3.135V, V
IN
=
V
CLP
to (V
CLP
+1.05V), R
L
= 75Ω to -0.2V
Output Short-Circuit Current
Output Resistance
R
OUT
Short to GND (sourcing)
Short to V
DD
(sinking)
V
OUT
= 1.5V, -10mA
≤
I
LOAD
≤
+10mA
2
_______________________________________________________________________________________
Quadruple, 2:1, Mux Amplifiers for
Standard-Definition and VGA Signals
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 3.3V, V
GND
= 0,
SHDN
= V
DD
,
A/B
= V
DD
, R
L
= 150Ω to GND, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are
at T
A
= +25°C.) (Note 1)
PARAMETER
Power-Supply Rejection Ratio
Small-Signal Bandwidth
Large-Signal Bandwidth
Slew Rate
Settling Time
SYMBOL
CONDITIONS
2.7V
≤
V
DD
≤
3.6V
f = 100kHz, 100mV
P-P
V
OUT
= 100mV
P-P
(MAX9542 only)
V
OUT
= 2V
P-P
(MAX9542 only)
MAX9542 only
Settled to within 0.1% of final value
(MAX9542 only)
V
OUT
= 2V
P-P
, reference frequency is
100kHz, ±1dB passband flatness
(MAX9541 only)
Standard-Definition
Reconstruction Filter
f = 5.5MHz
V
OUT
= 2V
P-P
, reference
frequency is 100kHz
(MAX9541 only)
f = 9.5MHz
f = 10MHz
f = 27MHz
Differential Gain
DG
5-step modulated staircase of 129mV step
size and 286mV peak-to-peak subcarrier
amplitude, f = 4.43MHz
5-step modulated staircase of 129mV step
size and 286mV peak-to-peak subcarrier
amplitude, f = 4.43MHz
100kHz
≤
f
≤
5MHz, outputs are 2V
P-P
100kHz
≤
f
≤
5MHz
2T = 200ns
2T = 200ns; bar time is 18μs; the beginning
2.5%, and the ending 2.5% of the bar time
is ignored
2T = 200ns; bar time is 18μs; the beginning
2.5%, and the ending 2.5% of the bar time
is ignored
5-step staircase
f = 5.5MHz
f = 15kHz
f = 4.43MHz
f = 30MHz
MIN
48
TYP
64
20
27
15
65
75
MAX
UNITS
dB
MHz
MHz
V/μs
ns
MAX9541/MAX9542
9.5
0.1
-1
-3
-47
0.4
MHz
dB
%
Differential Phase
Group-Delay Distortion
Peak Signal to RMS Noise
2T Pulse Response
2T Bar Response
DP
0.45
9
71
0.2
0.2
deg
ns
dB
K%
K%
2T Pulse-to-Bar K Rating
Nonlinearity
Output Impedance
All-Hostile Crosstalk
Output-to-Input Crosstalk
LOGIC SIGNALS (TV_SEL, VCR_SEL,
SHDN)
Logic-Low Threshold
Logic-High Threshold
Logic-Input Current
V
IL
V
IH
I
IN
0.3
0.1
8.07
-82
-78
-68
0.3 x
V
DD
0.7 x
V
DD
10
K%
%
Ω
dB
dB
V
V
μA
Note 1:
All devices are 100% production tested at T
A
= +25°C. Specifications over temperature limits are guaranteed by design.
Note 2:
Voltage gain (A
V
) is a two-point measurement in which the output-voltage swing is divided by the input-voltage swing.
_______________________________________________________________________________________
3
Quadruple, 2:1, Mux Amplifiers for
Standard-Definition and VGA Signals
MAX9541/MAX9542
Typical Operating Characteristics (MAX9541)
(V
DD
= 3.3V, V
GND
= 0,
SHDN
= V
DD
,
A/B
= V
DD
, R
L
= 150Ω to GND, T
A
= +25°C.)
SMALL-SIGNAL GAIN
vs. FREQUENCY
MAX9541 toc01
SMALL-SIGNAL GAIN FLATNESS
vs. FREQUENCY
MAX9541 toc02
LARGE-SIGNAL GAIN
vs. FREQUENCY
V
IN
= 1V
P-P
GAIN IS NORMALIZED TO 0dB
MAX9541 toc03
MAX9541 toc09
MAX9541 toc06
10
5
0
-5
-10
-15
-20
-25
-30
-35
-40
-45
-50
100k
1M
3
2
1
0
GAIN (dB)
V
IN
= 50mV
P-P
GAIN IS NORMALIZED TO 0dB
V
IN
= 50mV
P-P
GAIN IS NORMALIZED TO 0dB
10
5
0
-5
-10
-15
-20
-25
-30
-35
-40
-45
-50
GAIN (dB)
GAIN (dB)
-1
-2
-3
-4
-5
-6
-7
10M
100M
100k
1M
10M
100M
100k
1M
10M
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
LARGE-SIGNAL GAIN FLATNESS
vs. FREQUENCY
MAX9541 toc04
VIDEO CROSSTALK
vs. FREQUENCY
MAX9541 toc05
VIDEO GROUP DELAY DISTORTION
vs. FREQUENCY
120
110
100
90
GROUP DELAY (ns)
80
70
60
50
40
30
20
10
0
V
IN
= 1V
P-P
GAIN IS NORMALIZED TO 0dB
3
2
1
0
GAIN (dB)
V
IN
= 1V
P-P
GAIN IS NORMALIZED TO 0dB
0
-20
-40
GAIN (dB)
-60
ALL-HOSTILE
-80
-100
-120
V
IN
= 1V
P-P
GAIN IS NORMALIZED TO 0dB
-1
-2
-3
-4
-5
-6
-7
100k
1M
10M
100M
FREQUENCY (Hz)
2 ADJACENT CHANNELS
1 ADJACENT CHANNEL
100k
1M
10M
100M
100k
1M
10M
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
VIDEO PSRR
vs. FREQUENCY
MAX9541 toc07
VOLTAGE GAIN
vs. TEMPERATURE
MAX9541 toc08
DIFFERENTIAL GAIN
DIFFERENTIAL GAIN (%)
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
0
0.8
0.6
0.4
0.2
0
-0.2
-0.4
0
1
2
3
1
2
3
f = 3.58MHz
0
-10
-20
PSRR (dB)
-30
-40
-50
-60
-70
-80
2.04
2.03
VOLTAGE GAIN (V/V)
2.02
2.01
2.00
1.99
1.98
1.97
1.96
-50
-25
0
25
50
75
100
V
DD
= 3.3V + 100mV
P-P
4
5
DIFFERENTIAL PHASE (deg)
DIFFERENTIAL PHASE
f = 3.58MHz
100k
1M
10M
100M
125
4
5
FREQUENCY (Hz)
TEMPERATURE (°C)
4
_______________________________________________________________________________________
Quadruple, 2:1, Mux Amplifiers for
Standard-Definition and VGA Signals
Typical Operating Characteristics (continued) (MAX9541)
(V
DD
= 3.3V, V
GND
= 0,
SHDN
= V
DD
,
A/B
= V
DD
, R
L
= 150Ω to GND, T
A
= +25°C.)
MAX9541/MAX9542
DIFFERENTIAL GAIN
DIFFERENTIAL GAIN (%)
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
0
0.8
0.6
0.4
0.2
0
-0.2
-0.4
0
1
2
3
1
2
3
f = 4.43MHz
MAX9541 toc10
2T RESPONSE
MAX9541 toc11
12.5T RESPONSE
MAX9541 toc12
IN
200mV/div
IN
200mV/div
4
5
DIFFERENTIAL PHASE (deg)
DIFFERENTIAL PHASE
f = 4.43MHz
OUT
400mV/div
OUT
400mV/div
4
5
100ns/div
400ns/div
NTC-7 VIDEO TEST SIGNAL
MAX9541 toc13
FIELD SQUARE WAVE
VIDEO SYNC-TIP CLAMP VOLTAGE
vs. TEMPERATURE
MAX9541 toc14
0.36
SYNC-TIP CLAMP VOLTAGE (V)
IN
500mV/div
IN
500mV/div
0.35
0.34
0.33
0.32
0.31
0.30
0.29
0.28
10μs/div
2ms/div
-50
-25
0
25
50
75
100
OUT
1V/div
OUT
1V/div
125
TEMPERATURE (°C)
VIDEO SYNC-TIP CLAMP CURRENT
vs. TEMPERATURE
MAX9541 toc16
SYNC-TIP CLAMP CURRENT
vs. INPUT VOLTAGE
MAX9541 toc17
QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
QUIESCENT SUPPLY CURRENT (mA)
21.5
21.0
20.5
20.0
19.5
19.0
18.5
18.0
-50
-25
0
25
50
75
100
125
MAX9541 toc18
1.06
SYNC-TIP CLAMP CURRENT (μA)
1.04
1.02
1.00
0.98
0.96
0.94
0.92
0.90
-50
-25
0
25
50
75
100
500
SYNC-TIP CLAMP CURRENT (μA)
400
300
200
100
0
-100
22.0
125
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
TEMPERATURE (°C)
INPUT VOLTAGE (V)
TEMPERATURE (°C)
_______________________________________________________________________________________
MAX9541 toc15
0.37
5
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