MAX9541 データシートの表示（PDF） - Maxim Integrated

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MAX9541

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

Maxim Integrated 

MAX9541/MAX9542

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 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 suit-

able 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 lΩoad, 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.

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

Ordering Information

PART

PIN-PACKAGE

STANDARD-

DEFINITION

VIDEO FILTER

MAX9541AEE+

16 QSOP

Yes

MAX9542AEE+

16 QSOP

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

●● Industrial

Functional Diagram

UNKNOWN

BIAS

SHDN

A/B

IN0A

IN1A

IN2A

IN3A

IN0B

IN1B

IN2B

IN3B

*LOWPASS FILTER IN MAX9541 ONLY.

VDD

MAX9541

MAX9542

0

1

CLAMPREF

0

1

LPF*

2V/V

OUT0

300mV

LPF*

2V/V

OUT1

CLAMPREF

0

1

LPF*

2V/V

OUT2

0

CLAMPREF

1

CLAMPREF

OUT3

LPF*

2V/V

GND

19-4457; Rev 1; 9/14

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