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参数资料
| 型号： | MAX7462USA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/8页 |
| 文件大小： | 0K |
| 描述： | IC FILTER BUFFER VID 8-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 视频滤波器 |
| 应用： | 录音机，机顶盒 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
Detailed Description
The MAX7462/MAX7463 filters and buffers the analog
CVBS video outputs of DAC video-encoders in applica-
tions such as set-top boxes, hard-disk recorders, DVD
players, and digital VCRs. The MAX7462/MAX7463 con-
sist of a lowpass filter and an output video buffer that can
drive two standard 150
video loads. These devices
operate from a single +5V supply and have a bandwidth
optimized for interlaced NTSC, PAL, and SDTV.
Filter
The reconstruction filter is a 4th-order Butterworth-type
response that features a maximally flat passband for
NTSC and PAL bandwidths. The stopband attenuation
is optimized for a video-encoder DAC sampling fre-
quency of 27MHz (see the Typical Operating
Characteristics).
Output Buffer
The output buffer can drive two 150
video loads with
a 2VP-P signal. For the MAX7462, the output buffer gain
is selectable between +6dB and +9.5dB by using GAIN
(see Table 1). The MAX7463 has a fixed gain of +6dB.
The MAX7462/MAX7463 can drive an AC load or drive
the video load directly without using a large output
capacitor. The output buffer can drive DC loads while
maintaining an output blanking level of less than 1V. The
blanking level allows the MAX7462/MAX7463 to meet the
digital TV interface specifications for DC coupling.
Applications Information
Input Considerations
Use a 0.1F ceramic capacitor to AC-couple the input.
The input capacitor stores a DC voltage so that the out-
put is clamped to the appropriate DC voltage level.
Output Considerations
The outputs are typically connected to a 75
series
back-match resistor followed by the video cable.
Because of the inherent divide-by-two of this configura-
tion, the blanking level on the video cable is always
less than 1V, complying with industry-standard video
requirements such as the digital TV standard (which
allows up to 1VDC on the video cable) and the
European SCART standard (which allows up to 2VDC
on the video cable). 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 MAX7462/MAX7463 operate from a single +5V
supply. Bypass VCC to GND with a 0.1F capacitor. In
addition, it is sometimes advantageous to connect a
10F capacitor within the general vicinity of the video
circuitry. Place all other external components as close
to the device as possible.
MAX7462/MAX7463
Single-Channel Video Reconstruction Filters
and Buffers
_______________________________________________________________________________________
5
Pin Description
PIN
MAX7462
MAX7463
NAME
FUNCTION
1
IN
Video Input. AC-couple IN with a series 0.1F capacitor.
2
—
GAIN
Gain Control Input. Connect GAIN to GND for a gain of +6dB (+2V/V). Connect GAIN to VCC
for a gain of +9.5dB (+3V/V).
3, 4, 5
3
GND
Ground
—
2, 4, 5, 6
N.C.
No Connection. Not internally connected. Connect to GND for better performance.
6—
DISABLE
Disable Input. Connect to VCC to enable the output buffer (normal operation). Connect to GND
to put the output buffer in a high-impedance state.
77
VCC
+5V Supply Input
8
OUT
Buffer Output. This output can be either AC- or DC-coupled. Use at minimum a 220F
capacitor for AC-coupled loads.
GAIN
BUFFER GAIN (dB)
GND
+6
VCC
+9.5
Table 1. Gain Setting Control (MAX7462)
相关PDF资料 |
PDF描述 |
|---|---|
| PX0911/02/P | CONN PLUG 2POS W/PINS |
| MAX7463USA+T | IC FILTER RECON VIDEO 8-SOIC |
| VE-JV0-MY-F1 | CONVERTER MOD DC/DC 5V 50W |
| ADN4662BRZ | IC RCVR DIFF LVDS 1CH 8SOIC |
| VE-J1Z-MY-F4 | CONVERTER MOD DC/DC 2V 20W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX7462UUA | 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 |
| MAX7462UUA+ | 功能描述:有源滤波器 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 |
| MAX7462UUA+T | 功能描述:视频 IC Video Reconstruction Filtr RoHS:否 制造商:Fairchild Semiconductor 工作电源电压:5 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-28 封装:Reel |
| MAX7462UUA-T | 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 |
| MAX7463USA | 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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