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參數(shù)資料
| 型號(hào)： | MAX7463USA |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | Single-Channel Video Reconstruction Filters and Buffers |
| 中文描述： | CONTINUOUS TIME FILTER, BUTTERWORTH, LOWPASS, PDSO8 |
| 封裝： | 0.150 INCH, MS-012AA, SOIC-8 |
| 文件頁數(shù)： | 5/8頁 |
| 文件大小： | 274K |
| 代理商： | MAX7463USA |
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 2V
P-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 0.1μF 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 220μF.
Power-Supply Bypassing and Layout
The MAX7462/MAX7463 operate from a single +5V
supply. Bypass V
CC
to GND with a 0.1μF capacitor. In
addition, it is sometimes advantageous to connect a
10μF capacitor within the general vicinity of the video
circuitry. Place all other external components as close
to the device as possible.
M
Single-Channel Video Reconstruction Filters
and Buffers
_______________________________________________________________________________________
5
Pin Description
PIN
MAX7462
1
MAX7463
1
NAME
FUNCTION
IN
Video Input. AC-couple IN with a series 0.1μF capacitor.
2
—
GAIN
Gain Control Input. Connect GAIN to GND for a gain of +6dB (+2V/V). Connect GAIN to V
CC
for a gain of +9.5dB (+3V/V).
3, 4, 5
—
3
GND
N.C.
Ground
No Connection. Not internally connected. Connect to GND for better performance.
2, 4, 5, 6
6
—
DISABLE
Disable Input. Connect to V
CC
to enable the output buffer (normal operation). Connect to GND
to put the output buffer in a high-impedance state.
7
7
V
CC
+5V Supply Input
8
8
OUT
Buffer Output. This output can be either AC- or DC-coupled. Use at minimum a 220μF
capacitor for AC-coupled loads.
GAIN
GND
V
CC
BUFFER GAIN (dB)
+6
+9.5
Table 1. Gain Setting Control (MAX7462)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX7463USA+ | 功能描述:有源濾波器 Video Reconstruction Filtr 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(fēng)格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube |
| MAX7463USA+T | 功能描述:視頻 IC Video Reconstruction Filtr RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
| MAX7463USA-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(fēng)格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube |
| MAX7469UTP | 功能描述:視頻 IC RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
| MAX7469UTP+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
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