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General Description

The MAX9532 DirectDrive

video filter amplifier is

specifically designed to work in harsh environments

such as automobiles. The MAX9532 provides integrat-

ed short-to-battery protection, allowing the output of the

device to survive shorts up to 18V.

Maxim’s DirectDrive technology eliminates large output

coupling capacitors and sets the output video black

level near ground. DirectDrive requires an integrated

charge pump and an internal linear regulator to create

a clean negative power supply so that the amplifier can

pull the sync below ground. The charge pump injects

so little noise into the video output that the picture is

visibly flawless.

The MAX9532 features an internal reconstruction filter

that smoothes the steps and reduces the spikes on the

video signal from the video digital-to-analog converter

(DAC). The reconstruction filter typically provides ±1dB

passband flatness of 9.5MHz and 42dB attenuation at

27MHz.

The input of the MAX9532 can be directly connected to

the output of a video DAC. The MAX9532 also features a

transparent input sync-tip clamp, allowing AC-coupling

of input signals with different DC biases.

The MAX9532 features an internal fixed gain of 4V/V. The

input full-scale video signal is nominally 0.5V

P-P

, and the

output full-scale video signal is nominally 2V

P-P

The short-to-battery protection utilizes an internal switch

in series with the amplifier output. When the MAX9532

detects that the output is short circuited to the battery

voltage, the internal switch is disabled, protecting the

MAX9532 from voltages up to 18V.

The MAX9532 is available in a 3mm x 3mm, 10-pin

µMAX

package and is specified over the -40°C to

+125°C automotive operating temperature range.

Features

♦ Short-to-Battery Protection on Video Output (Up

to 18V)

♦ DirectDrive Sets Video Output Black Level Near

Ground

♦ DirectDrive Eliminates DC-Blocking Capacitors at

the Output

♦ 3.3V Single-Supply Operation

♦ Reconstruction Filter with 9.5MHz Passband and

42dB Attenuation at 27MHz

♦ DC-Coupled Input/Output

♦ Transparent Input Sync-Tip Clamp

♦ 4V/V Internal Fixed Gain

MAX9532

DirectDrive Video Amplifier with

Short-to-Battery Protection

________________________________________________________________

Maxim Integrated Products

19-4431; 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.

EVALUATION KIT

AVAILABLE

Ordering Information

PART PIN-PACKAGE TEMP RANGE

MAX9532AUB+ 10 µMAX -40°C to +125°C

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

DirectDrive is a registered trademark of Maxim Integrated Products, Inc.

µMAX is a registered trademark of Maxim Integrated Prodcuts, Inc.

JACKSENSE

OUT

TRANSPARENT

CLAMP

LINEAR

REGULATOR

= 4V/V

CHARGE

PUMP

LPF

MAX9532

500mV

P-P

VIDEO

P-P

VIDEO

Simplified Block Diagram

Applications

Automotive Infotainment Systems

Pin Configuration and Functional Diagram/Typical

Application Circuits appear at end of data sheet.

1 2 3 4 5 6 ... 11 12

Short-to-Battery Protection 1

Indice de contenidos

Pagina 1 - Short-to-Battery Protection

General DescriptionThe MAX9532 DirectDrive®video filter amplifier isspecifically designed to work in harsh environmentssuch as automobiles. The MAX953

Pagina 2

Power-Supply Bypassingand Ground ManagementThe MAX9532 operates from a 3V to 3.6V single supplyand requires proper layout and bypassing. For the bestp

Pagina 3

MAX9532DirectDrive Video Amplifier with Short-to-Battery Protection___________________________________________________________________________________

Pagina 4

MAX9532DirectDrive Video Amplifier withShort-to-Battery ProtectionMaxim cannot assume responsibility for use of any circuitry other than circuitry ent

Pagina 5

MAX9532DirectDrive Video Amplifier with Short-to-Battery Protection2 _________________________________________________________________________________

Pagina 6

MAX9532DirectDrive Video Amplifier with Short-to-Battery Protection___________________________________________________________________________________

Pagina 7

MAX9532DirectDrive Video Amplifier with Short-to-Battery Protection4 _________________________________________________________________________________

Pagina 8

MAX9532DirectDrive Video Amplifier withShort-to-Battery Protection____________________________________________________________________________________

Pagina 9

MAX9532DirectDrive Video Amplifier withShort-to-Battery Protection6 __________________________________________________________________________________

Pagina 10

Detailed DescriptionThe MAX9532 DirectDrive video amplifier with short-to-battery protection features an internal 5-poleButterworth lowpass filter wit

Pagina 11

MAX9532With the DirectDrive amplifier, the black level is held atground. The video signal is constrained between -0.3V to +0.7V. Figure 2 shows the vi

Pagina 12

Interfacing to Video DACs that ProduceVideo Signals Higher than 0.5VP-PDevices designed to generate 1VP-Pvideo signals atthe output of the video DAC c

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