MAXIM MAX9541, MAX9542 Technical data

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 standard­definition video signals such as composite and red,
green, blue (RGB). The filters typically have ±1dB pass­band 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, mak­ing it suitable for not only standard-definition video sig­nals, 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 shut­down mode, in which supply current is reduced to 35µA.

Applications

Automotive Infotainment

Features

♦ 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

MAX9541/MAX9542

Quadruple, 2:1, Mux Amplifiers for

Standard-Definition and VGA Signals

________________________________________________________________

Maxim Integrated Products

1

19-4457; Rev 0; 2/09

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.

UNKNOWN

BIAS

300mV

IN2A

IN3A

OUT1

IN1A

IN0A

OUT0

OUT3

OUT2

IN3B

IN2B

IN1B

IN0B

A/B

0

1

0

1

0

1

0

1

V

DD

GND

MAX9541
MAX9542

SHDN

LPF*

CLAMPREF

2V/V

LPF*

CLAMPREF

2V/V

LPF*

CLAMPREF

2V/V

LPF*

CLAMPREF

2V/V

*LOWPASS FILTER IN MAX9541 ONLY.

Functional Diagram

Ordering Information

Note: All devices are specified over the -40°C to +125°C oper­ating temperature range.

+

Denotes a lead(Pb)-free/RoHS-compliant package.

STANDARD-

PART PIN-PACKAGE

MAX9541AEE+ 16 QSOP Yes

MAX9542AEE+ 16 QSOP No

DEFINITION

VIDEO FILTER

MAX9541/MAX9542

Quadruple, 2:1, Mux Amplifiers for
Standard-Definition and VGA Signals

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VDD= 3.3V, V

GND

= 0,

SHDN

= VDD,

A/B

= VDD, RL= 150Ω to GND, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are

at T

A

= +25°C.) (Note 1)

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.

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

Supply Voltage Range V

Quiescent Supply Current I

Shutdown Supply Current I

Input Voltage Unselected input VDD/3 V

Input Resistance Unselected input 222 kΩ

Sync-Tip Clamp Level V

Input Voltage Range

Sync Crush

Input Clamping Current 12µA

Maximum Input Source
Resistance

DC Voltage Gain (Note 2) A

DC Gain Mismatch Guaranteed by DC voltage gain -2 +2 %

Output Level Measured at V

Output Voltage Swing

Output Short-Circuit Current

Output Resistance R

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DD

DD

SHDN

CLP

Guaranteed by power-supply rejection test 2.7 3.3 3.6 V

No load 21 45 mA
SHDN = A/B= GND 35 70 μA

Guaranteed by DC
voltage gain

2.7V ≤ VDD ≤ 3.6V 1.05

3.0V ≤ V

≤ 3.6V 1.2

DD

Sync-tip clamp; percentage reduction in
sync pulse (0.3V

); guaranteed by input

P-P

clamping current measurement

VDD = 2.7V,

RL = 150Ω to GND

V

(Note 2)

OUT

, C

0V ≤ V

V
0V ≤ V

IN_

≤ 1.05V

IN

= 3V,

DD

≤ 1.2V

IN

= 0.1µF to GND 0.218 0.3 0.39 V

Measured at output, VDD = 2.7V, VIN =
V

CLP

to (V

+1.05V), RL = 150Ω to -0.2V

CLP

Measured at output, VDD = 2.7V, VIN =
V

CLP

to (V

+1.05V), RL = 150Ω to VDD/2

CLP

Measured at output, VDD = 3.0V, VIN =
V

CLP

to (V

+1.2V), RL = 150Ω to -0.2V

CLP

Measured at output, VDD = 3.0V, VIN =
V

to (V

CLP

Measured at output, V

to (V

V

CLP

+1.2V), RL = 150Ω to VDD/2

CLP

= 3.135V, VIN =

+1.05V), RL = 75Ω to -0.2V

CLP

DD

Short to GND (sourcing) 140

(sinking) 70

DD

= 1.5V, -10mA ≤ I

≤ +10mA 0.2 Ω

LOAD

OUT

Short to V

V

OUT

0.23 0.3 0.39 V

2%

300 Ω

1.96 2 2.04

1.96 2 2.04

2.1

2.1

2.4

2.4

2.1

V

V/V

V

mA

P-P

P-P

MAX9541/MAX9542

Quadruple, 2:1, Mux Amplifiers for

Standard-Definition and VGA Signals

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VDD= 3.3V, V

GND

= 0,

SHDN

= VDD,

A/B

= VDD, RL= 150Ω to GND, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are

at T

A

= +25°C.) (Note 1)

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.

Power-Supply Rejection Ratio

Small-Signal Bandwidth V

Large-Signal Bandwidth V

Slew Rate MAX9542 only 65 V/μs

Settling Time

Standard-Definition
Reconstruction Filter

Differential Gain DG

Differential Phase DP

Group-Delay Distortion 100kHz ≤ f ≤ 5MHz, outputs are 2V

Peak Signal to RMS Noise 100kHz ≤ f ≤ 5MHz 71 dB

2T Pulse Response 2T = 200ns 0.2 K%

2T Bar Response

2T Pulse-to-Bar K Rating

Nonlinearity 5-step staircase 0.1 %

Output Impedance f = 5.5MHz 8.07 Ω

All-Hostile Crosstalk

Output-to-Input Crosstalk f = 30MHz -68 dB

LOGIC SIGNALS (TV_SEL, VCR_SEL, SHDN)

Logic-Low Threshold V

Logic-High Threshold V

Logic-Input Current I

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

2.7V ≤ VDD ≤ 3.6V 48 64

f = 100kHz, 100mV

= 100mV

OUT

= 2V

OUT

Settled to within 0.1% of final value
(MAX9542 only)

V

= 2V

OUT

100kHz, ±1dB passband flatness
(MAX9541 only)

V

= 2V

OUT

frequency is 100kHz
(MAX9541 only)

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

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

f = 15kHz -82

f = 4.43MHz -78

IL

IH

IN

P-P

(MAX9542 only) 15 MHz

P-P

, reference frequency is

P-P

, reference

P-P

P-P

(MAX9542 only) 27 MHz

f = 5.5MHz 0.1

f = 9.5MHz -1

f = 10MHz -3

f = 27MHz -47

20

75 ns

9.5 MHz

0.4 %

0.45 deg

P-P

0.7 x
V

DD

9ns

0.2 K%

0.3 K%

0.3 x
V

DD

10 μA

dB

dB

dB

V

V

MAX9541/MAX9542

Quadruple, 2:1, Mux Amplifiers for
Standard-Definition and VGA Signals

4 _______________________________________________________________________________________

Typical Operating Characteristics (MAX9541)

(VDD= 3.3V, V

GND

= 0,

SHDN

= VDD, A/B = VDD, RL= 150Ω to GND, TA= +25°C.)

SMALL-SIGNAL GAIN

vs. FREQUENCY

MAX9541 toc01

FREQUENCY (Hz)

GAIN (dB)

10M1M

-45

-40

-35

-30

-25

-20

-15

-10

-5

0

5

10

-50
100k 100M

VIN = 50mV

P-P

GAIN IS NORMALIZED TO 0dB

SMALL-SIGNAL GAIN FLATNESS

vs. FREQUENCY

MAX9541 toc02

FREQUENCY (Hz)

GAIN (dB)

10M1M

-6

-5

-4

-3

-2

-1

0

1

2

3

-7
100k 100M

VIN = 50mV

P-P

GAIN IS NORMALIZED TO 0dB

LARGE-SIGNAL GAIN

vs. FREQUENCY

MAX9541 toc03

FREQUENCY (Hz)

GAIN (dB)

10M1M

-45

-40

-35

-30

-25

-20

-15

-10

-5

0

5

10

-50
100k 100M

VIN = 1V

P-P

GAIN IS NORMALIZED TO 0dB

LARGE-SIGNAL GAIN FLATNESS

vs. FREQUENCY

MAX9541 toc04

FREQUENCY (Hz)

GAIN (dB)

10M1M

-6

-5

-4

-3

-2

-1

0

1

2

3

-7
100k 100M

VIN = 1V

P-P

GAIN IS NORMALIZED TO 0dB

VIDEO CROSSTALK

vs. FREQUENCY

MAX9541 toc05

FREQUENCY (Hz)

GAIN (dB)

10M1M

-100

-80

-60

-40

-20

0

-120
100k 100M

ALL-HOSTILE

1 ADJACENT CHANNEL

2 ADJACENT CHANNELS

VIN = 1V

P-P

GAIN IS NORMALIZED TO 0dB

VIDEO GROUP DELAY DISTORTION

vs. FREQUENCY

MAX9541 toc06

FREQUENCY (Hz)

GROUP DELAY (ns)

10M1M

10

20

30

40

50

60

70

80

90

100

110

120

0

100k 100M

VIN = 1V

P-P

GAIN IS NORMALIZED TO 0dB

VIDEO PSRR

vs. FREQUENCY

MAX9541 toc07

FREQUENCY (Hz)

PSRR (dB)

10M1M

-70

-60

-50

-40

-30

-20

-10

0

-80
100k 100M

VDD = 3.3V + 100mV

P-P

VOLTAGE GAIN

vs. TEMPERATURE

MAX9541 toc08

TEMPERATURE (°C)

VOLTAGE GAIN (V/V)

10075-25 0 25 50

1.97

1.98

1.99

2.00

2.01

2.02

2.03

2.04

1.96

-50 125

DIFFERENTIAL GAIN

MAX9541 toc09

DIFFERENTIAL PHASE (deg)

103245

0.6

0.8

0.4

0.2
0

-0.2

-0.4

DIFFERENTIAL GAIN (%)

0

0.1

-0.1

-0.2

-0.3

-0.4

-0.5

DIFFERENTIAL PHASE

103245

f = 3.58MHz

f = 3.58MHz

MAX9541/MAX9542

Quadruple, 2:1, Mux Amplifiers for

Standard-Definition and VGA Signals

_______________________________________________________________________________________ 5

Typical Operating Characteristics (continued) (MAX9541)

(VDD= 3.3V, V

GND

= 0,

SHDN

= VDD, A/B = VDD, RL= 150Ω to GND, TA= +25°C.)

DIFFERENTIAL GAIN

0.1
0

-0.1

-0.2

-0.3

-0.4

-0.5

DIFFERENTIAL GAIN (%)

103245

DIFFERENTIAL PHASE

0.8

0.6

0.4

0.2
0

-0.2

-0.4

DIFFERENTIAL PHASE (deg)

103245

NTC-7 VIDEO TEST SIGNAL

10

12.5T RESPONSE

400ns/div

VIDEO SYNC-TIP CLAMP VOLTAGE

vs. TEMPERATURE

TEMPERATURE (°C)

μs/div

f = 4.43MHz

f = 4.43MHz

MAX9541 toc13

MAX9541 toc10

IN
500mV/div

OUT
1V/div

2T RESPONSE

100ns/div

FIELD SQUARE WAVE

2ms/div

MAX9541 toc11

MAX9541 toc14

IN
200mV/div

OUT
400mV/div

IN
500mV/div

OUT
1V/div

0.37

0.36

0.35

0.34

0.33

0.32

0.31

0.30

SYNC-TIP CLAMP VOLTAGE (V)

0.29

0.28

-50 125

MAX9541 toc12

1007525 500-25

IN
200mV/div

OUT
400mV/div

MAX9541 toc15

VIDEO SYNC-TIP CLAMP CURRENT

vs. TEMPERATURE

1.06

1.04

1.02

1.00

0.98

0.96

0.94

SYNC-TIP CLAMP CURRENT (μA)

0.92

0.90

-50 125
TEMPERATURE (°C)

SYNC-TIP CLAMP CURRENT

vs. INPUT VOLTAGE

500

400

MAX9541 toc16

300

200

100

SYNC-TIP CLAMP CURRENT (μA)

0

10075-25 0 25 50

-100
0 0.40.2 0.6 0.8 1.0 1.2 1.4 1.6

INPUT VOLTAGE (V)

MAX9541 toc17

22.0

21.5

21.0

20.5

20.0

19.5

19.0

QUIESCENT SUPPLY CURRENT (mA)

18.5

18.0

QUIESCENT SUPPLY CURRENT

vs. TEMPERATURE

-50 125
TEMPERATURE (°C)

10075-25 0 25 50

MAX9541 toc18