MAX7443 Maxim, MAX7443 Datasheet
MAX7443
Manufacturer Part Number
MAX7443
Description
Triple-Channel Video Reconstruction Filter and Buffer for Composite and Y/C Outputs
Manufacturer
Maxim
Datasheet
1.MAX7443.pdf
(8 pages)
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The MAX7443/MAX7444 are low-cost, triple-channel
video reconstruction filters for S-video and CVBS video
signals. These devices are ideal for anti-aliasing and
DAC smoothing video applications such as set-top
boxes, DVD players, hard-disk recorders (HDRs), and
personal video recorders. These filters operate from a
single +5V supply. They are optimized for NTSC, PAL,
and standard-definition digital TV (SDTV) video systems.
Each channel consists of a lowpass filter and an
adjustable-gain output buffer capable of driving two
standard 150Ω video loads. The output buffers can drive
either an AC or a DC load such that the blanking level
voltage after the backmatch resistor is less than 1V. The
Y and C video inputs are summed to produce the com-
posite video output. The MAX7444 offers high-
frequency boost to improve picture sharpness. The
MAX7443 has a maximum flat-frequency response.
The MAX7443/MAX7444 are available in a tiny 8-pin thin
QFN and an 8-pin SO package with exposed pad, and
are fully specified over the -40°C to +85°C extended
temperature range.
19-2749; Rev 0; 1/03
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.
Set-Top Boxes/HDR/DVD
Security Cameras/Digital
Cameras
Game Consoles
Triple-Channel Video Reconstruction Filter and
ENCODER
D/A
________________________________________________________________ Maxim Integrated Products
D/A
General Description
Buffer for Composite and Y/C Outputs
CIN
YIN
Digital VCRs
Every Composite,
S-Video Output for NTSC,
PAL, SDTV
MAX7443
MAX7444
LOWPASS
LOWPASS
Applications
FILTER
GND
FILTER
V
CC
Σ
6dB/
9.5dB/
12dB
6dB/
9.5dB/
12dB
6dB/
9.5dB/
12dB
GSET
o Triple-Channel Filter and Buffer for CVBS and
o Filter Response Ideal for NTSC, PAL, and
o 41dB (typ) Stopband Attenuation at 27MHz
o -0.3dB (typ) Passband Response
o Low Blanking Level Voltage Allows DC-Coupled
o Each Channel Drives Two 150Ω Video Loads
o +5V Single-Supply Voltage
o Tiny 8-Pin Thin QFN or 8-Pin SO Packages
*EP = Exposed pad.
Selector Guide appears at end of data sheet.
MAX7443ETA
MAX7443ESA
MAX7444ETA
MAX7444ESA
Y/C (S-Video)
Interlaced SDTV Signals
Output
CVOUT
YOUT
PART
COUT
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
*OPTIONAL
*
*
*
*
*
*
Ordering Information
Functional Diagram
PIN-PACKAGE
8 Thin QFN-EP*
8 SO-EP*
8 Thin QFN-EP*
8 SO-EP*
Features
MARK
TOP
AFX
AFY
—
—
1
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