參數(shù)資料
型號： MAX7439
廠商： Maxim Integrated Products, Inc.
英文描述： Triple-Channel Video Reconstruction Filters with Back-Porch Clamp to GND
中文描述： 三通道視頻重建濾波器，后肩鉗位至地
文件頁數(shù)： 1/10頁
文件大?。?/td> 386K
代理商： MAX7439
General Description
The MAX7438/MAX7439 three-channel standard defini-
tion 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 capa-
ble of driving two standard 150
video loads. The
blanking level of the output video signal on each chan-
nel 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 oper-
ate from ±5V dual supplies.
The three-channel MAX7438/MAX7439 are ideal for Y,
P
b
, P
r
, and RGB component video signals, three com-
posite video signals, and also Y/C plus CVBS video sig-
nals. Each filter channel achieves 60dB of attenuation at
27MHz and a maximally flat passband from DC to 5MHz.
The MAX7438 offers an internal gain of +2V/V, while the
MAX7439 offers a gain of +3V/V.
Applications
Composite, Component,
S-Video Output for
NTSC, PAL, SDTV
Features
o
Back-Porch of Video Output Signal Clamped to
Ground
o
Eliminates Input/Output AC-Coupling Capacitors
o
0.1% Line-Time Distortion
o
Stopband: 55dB at 27MHz
o
Passband: ±0.8dB out to 5MHz
o
Diff Gain = 0.05%, Diff Phase = 0.05 Degrees
o
Output Clamped to Ground with Loss of Input
o
Each Output Drives Two 150
Video Loads
o
Up to 2dB of High-Frequency Boost Control
o
Ideal for CVBS, Y/C (S-Video), and RGB (Y, P
b,
P
r
)
Outputs for NTSC, PAL, and SDTV
o
Filter Bypass Mode
o
Small 20-Pin 5mm
5mm Thin QFN Package
M
Triple-Channel Video Reconstruction Filters with
Back-Porch Clamp to GND
________________________________________________________________
Maxim Integrated Products
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.
1
Ordering Information
19-2857; Rev 0; 4/03
PART
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
20 Thin QFN-EP*
20 Thin QFN-EP*
MAX7438
ETP
MAX7439
ETP
*
EP = Exposed paddle
Pin Configuration appears at end of data sheet.
EVALUATION KIT
AVAILABLE
IN1
IN2
IN3
MAX7438
MAX7439
ENCODER
V
SS
= -5V
V
CC
= +5V
EXT
10k
GND
BACK-PORCH
DETECTOR
HIGH-FREQUENCY
BOOST CONTROL/
BYPASS
BIAS
GENERATOR
DAC2
LOWPASS
FILTER
DAC3
HFB1
HFB2
HFB3
DAC1
OUT1
Z
0
= 75
75
75
Z
0
= 75
75
75
GAIN/
LEVEL
SHIFT
LOWPASS
FILTER
LOWPASS
FILTER
OUT2
Z
0
= 75
75
75
Z
0
= 75
75
75
OUT3
Z
0
= 75
75
75
Z
0
= 75
75
75
GAIN/
LEVEL
SHIFT
GAIN/
LEVEL
SHIFT
Functional Diagram
Set-Top Boxes/HDR/DVD
Game Consoles
Camcorders
相關(guān)PDF資料
PDF描述
MAX7439ETP Triple-Channel Video Reconstruction Filters with Back-Porch Clamp to GND
MAX7447 4-Channel S-Video, CVBS Video Filter with Asynchronous CVBS Input
MAX7447EUD 4-Channel S-Video, CVBS Video Filter with Asynchronous CVBS Input
MAX7545A CMOS 12-BIT BUFFERED MULTIPLYING DACs
MAX7545ALP CMOS 12-BIT BUFFERED MULTIPLYING DACs
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX7439ETP 功能描述:有源濾波器 RoHS:否 制造商:Maxim Integrated 通道數(shù)量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube
MAX7439ETP+ 功能描述:有源濾波器 Integrated Circuits (ICs) RoHS:否 制造商:Maxim Integrated 通道數(shù)量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube
MAX7439ETP+T 功能描述:有源濾波器 Integrated Circuits (ICs) RoHS:否 制造商:Maxim Integrated 通道數(shù)量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube
MAX7439ETP-T 功能描述:有源濾波器 RoHS:否 制造商:Maxim Integrated 通道數(shù)量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube
MAX743C/D DIE 制造商:Maxim Integrated Products 功能描述:
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