General Description

The MAX9503 filters and amplifies standard-definition

video signals. Maxim’s DirectDrive™ technology elimi-

nates large output-coupling capacitors and sets the

video black level to ground. The input of the MAX9503

can be directly connected to the output of a video

digital-to-analog converter (DAC). The MAX9503 pro-

vides a compact, integrated, and low-power solution.

An internal reconstruction filter smoothes the steps and

reduces the spikes on the video signal from the DAC.

The reconstruction filter typically has 3dB attenuation at

9MHz and 50dB attenuation at 27MHz, and ±1dB pass-

band flatness to 5.5MHz.

Maxim’s DirectDrive uses an integrated charge pump

and a linear regulator to create a clean negative power

supply to drive the sync below ground. The charge

pump injects so little noise into the video output that the

picture is visibly flawless.

The MAX9503 is available with +6dB (MAX9503G) and

+12dB (MAX9503M) gains. The device operates from a

2.7V to 3.6V single supply and features a 10nA low-

power shutdown mode.

The MAX9503 is offered in space-saving 16-pin QSOP

and 16-pin TQFN packages and is specified over the

-40°C to +85°C extended temperature range.

Applications

Digital Still Cameras

Mobile Phones/Smartphones

Security Cameras

Portable Media Players

Space-Constrained, Low-Power Portable

Devices

Features

♦ DC-Coupled Output

♦ Direct Connection to Video DAC

♦ Video Output Black Level Set to Ground

♦ Video Reconstruction Filter with 50dB

Attenuation at 27MHz

♦ Preset Gain

6dB (MAX9503G)

12dB (MAX9503M)

♦ 10nA Shutdown Supply Current

♦ 2.7V to 3.6V Single-Supply Operation

DirectDrive Video Amplifier with

Reconstruction Filter

________________________________________________________________ Maxim Integrated Products

1

Ordering Information

0 TO 50mV

0V

-0.1V TO

+0.1V

MAX9503

AMP

LINEAR

REGULATOR

CHARGE

PUMP

BUFFER

VIDOUT

VIDIN

MAX9503G: 6dB

MAX9503M: 12dB

LOWPASS

FILTER

0V

19-3676; Rev 0; 5/05

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.

PART*

PIN-

PACKAGE

PKG CODE

TOP MARK

MAX9503GEEE

16 QSOP

E16-4

—

MAX9503GETE

16 TQFN

T1633-4

ACU

MAX9503MEEE

16 QSOP

E16-4

—

MAX9503METE

16 TQFN

T1633-4

ACV

Functional Diagram/Typical Operating Circuit and Pin

Configurations appear at end of data sheet.

*All devices are specified over the -40°C to +85°C operating

temperature range.

Block Diagram