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参数资料
| 型号： | MAX7444ESA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/8页 |
| 文件大小： | 0K |
| 描述： | IC FILTER RECON VID 8-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 滤波器类型： | 低通 |
| 频率 - 截止或中心： | 27MHz |
| 滤波器数： | 2 |
| 电源电压： | 4.75 V ~ 5.25 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm Width）裸露焊盘 |
| 供应商设备封装： | 8-SO 裸露焊盘 |
| 包装： | 带卷 (TR) |
12dB Gain Setting
The GSET pin is biased internally to VCC/2 through two
100k resistors from VCC to GND. The internal imped-
ance at the node is 50k. No additional connection is
necessary since the pin offers a minimum noise margin
immunity of 1VP-P.
Output Clamp Level
When sync pulses in the luma signal (Y) are detected,
the DC restore loop is activated. The function of the
loop is to set the sync tip of the video signal to the
desired DC level of 0.8V for YOUT and COUT and the
average DC voltage of COUT at 1.6V.
Applications Information
Input Considerations
Use a 0.1F ceramic capacitor to AC-couple the input
to the MAX7443/MAX7444. This input capacitor stores
a DC level such that the outputs are clamped to the
appropriate DC voltage level.
Output Considerations
The outputs of the MAX7443/MAX7444 are typically
connected to a 75 series back-match resistor fol-
lowed by the video cable. Because of the inherent
divide by two of this configuration, the blanking level of
the video cable is always less than 1V, which complies
with industry-standard video requirements. The video
buffer can also drive an AC-coupled video load. Good
video performance is achieved with an output capacitor
as low as 220F.
Power-Supply Bypassing and Layout
The MAX7443/MAX7444 operate from a single +5V
supply. Bypass VCC to GND with a 0.1F capacitor.
Place all external components as close to the device as
possible. Refer to the MAX7443 evaluation kit for a
proven PC board layout example.
Exposed Pads
Both the SO and thin QFN packages of the MAX7443/
MAX7444 have exposed pads on the bottom of the
packages. These pads are electrically connected to
GND and should be connected to the ground plane for
improved thermal conductivity. Do not route signals
under these packages.
Chip Information
TRANSISTOR COUNT: 4252
PROCESS: BiCMOS
MAX7443/MAX7444
Triple-Channel Video Reconstruction Filter and
Buffer for Composite and Y/C Outputs
_______________________________________________________________________________________________________
5
GSET
GAIN (dB)
GND
6
VCC
9.5
Open
12
Table 1. Gain-Setting Control
COUT
VCC
GND
1
2
8
7
YOUT
CVOUT
GSET
CIN
YIN
3
4
6
5
THIN QFN
TOP VIEW
COUT
VCC
GND
1
2
8
7
YOUT
CVOUT
GSET
CIN
YIN
3
4
6
5
SO
MAX7443
MAX7444
MAX7443
MAX7444
Pin Configurations
Selector Guide
PART
HIGH-FREQUENCY BOOST
MAX7443ETA
No
MAX7443ESA
No
MAX7444ETA
Yes
MAX7444ESA
Yes
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX7444ETA | 制造商:Maxim Integrated Products 功能描述:TRIPLE-CHANNEL VIDEO RECONSTRUCTION FILTER AN - Rail/Tube |
| MAX7444ETA+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX7444ETA+T | 功能描述:有源滤波器 3Ch Video Reconstruction Filtr RoHS:否 制造商:Maxim Integrated 通道数量:1 截止频率:150 KHz 电源电压-最大:11 V 电源电压-最小:4.74 V 最大工作温度:+ 85 C 安装风格:Through Hole 封装 / 箱体:PDIP N 封装:Tube |
| MAX7444ETA-T | 功能描述:有源滤波器 3Ch Video Reconstruction Filtr RoHS:否 制造商:Maxim Integrated 通道数量:1 截止频率:150 KHz 电源电压-最大:11 V 电源电压-最小:4.74 V 最大工作温度:+ 85 C 安装风格:Through Hole 封装 / 箱体:PDIP N 封装:Tube |
| MAX7445EUD | 功能描述:有源滤波器 RoHS:否 制造商:Maxim Integrated 通道数量:1 截止频率:150 KHz 电源电压-最大:11 V 电源电压-最小:4.74 V 最大工作温度:+ 85 C 安装风格:Through Hole 封装 / 箱体:PDIP N 封装:Tube |
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