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All versions are Not Recommended for New Designs.

Data Sheet

FULL DATA SHEET (PDF, 392kB) Download   E-Mail

Description

The MAX7438/MAX7439 three-channel, standard-definition video reconstruction filters include a back-porch clamp that sets the output blanking level of the video signal to ground. Each channel of the MAX7438/MAX7439 combines a lowpass filter with adjustable high-frequency boost levels and an output buffer capable of driving two standard 150Ω video loads. The blanking level of the output video signal on each channel is clamped to ground, eliminating the need for large AC-coupling output capacitors. Direct input-coupling circuitry eliminates the need for AC-coupling input capacitors. This DC-in/DC-out architecture results in extremely low line-time distortion. The MAX7438/MAX7439 are ideal for antialiasing and DAC smoothing in digital video devices such as STBs, DVDs, PVRs, and hard disk recorders. The MAX7438/MAX7439 operate from ±5V dual supplies. The three-channel MAX7438/MAX7439 are ideal for Y, Pb, Pr, and RGB component video signals, three composite video signals, and also Y/C plus CVBS video signals. Each filter channel achieves 60dB of attenuation at 27MHz and a maximally flat passband from DC to 5MHz. The MAX7438 offers an internal +2V/V gain, while the MAX7439 offers a +3V/V gain.

An evaluation kit is available:  MAX7438EVKIT  

Key Features		Applications/Uses
Back-Porch of Video Output Signal Clamped to Ground Eliminates Input/Output AC-Coupling Capacitors 0.1% Line-Time Distortion Stopband: 55dB at 27MHz Passband: ±0.8dB out to 5MHz Diff Gain = 0.05%, Diff Phase = 0.05 Degrees Output Clamped to Ground with Loss of Input Each Output Drives Two 150Ω Video Loads Up to 2dB of High-Frequency Boost Control Ideal for CVBS, Y/C (S-Video), and RGB (Y, Pb, Pr) Outputs for NTSC, PAL, and SDTV Filter Bypass Mode Small 20-Pin 5mm x 5mm Thin QFN Package		Camcorders Composite, Component, S-Video Output for NTSC, PAL, SDTV Game Consoles Set-Top Boxes/HDR/DVD

Diagram

Typical Operating Circuit

Evaluation Kits

MAX7438EVKIT

Design Guides

Video (PDF) Audio (PDF)

Reliability Reports

Show FIT data for: MAX7438 MAX7439 Request Reliability Report for: MAX7438 MAX7439

Software/Models

none

Ordering Information

Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-8 of 8

MAX7438	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX7438ETP			NRND	TQFN;20 pin;26 mm² Outline Drawing: 21-0140 (PDF) Land Pattern: 90-0009 (PDF) Use pkgcode/variation: T2055-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX7438ETP-T			NRND	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX7438ETP+			NRND	TQFN;20 pin;26 mm² Outline Drawing: 21-0140 (PDF) Land Pattern: 90-0009 (PDF) Use pkgcode/variation: T2055+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX7438ETP+T			NRND	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX7439	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX7439ETP			NRND	TQFN;20 pin;26 mm² Outline Drawing: 21-0140 (PDF) Land Pattern: 90-0009 (PDF) Use pkgcode/variation: T2055-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX7439ETP-T			NRND	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX7439ETP+			NRND	TQFN;20 pin;26 mm² Outline Drawing: 21-0140 (PDF) Land Pattern: 90-0009 (PDF) Use pkgcode/variation: T2055+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX7439ETP+T			NRND	Land Pattern: Not Available	-40°C to +85°C	See data sheet

More Information

New Product Press Release 2003-05-01

Related Products

MAX7428, MAX7430, MAX7432 Standard Definition Video Reconstruction Filters and Buffers

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