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參數(shù)資料
| 型號(hào)： | MAX7482 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Bidirectional Video Filters/Buffers for Composite and S-Video Portable Media Devices |
| 中文描述： | 雙向視頻濾波器/緩沖器，用于復(fù)合視頻及S端子便攜式多媒體產(chǎn)品 |
| 文件頁數(shù)： | 8/13頁 |
| 文件大?。?/td> | 872K |
| 代理商： | MAX7482 |
M
Clamp
In record mode, signals are AC-coupled into IN3, IN4,
and IN5 through small 0.1μF capacitors. The clamp cir-
cuit internally DC-restores the signal for optimal perfor-
mance of the circuit so that the OUT4 blanking level sits
at GND and the OUT5 signal is centered at GND. Do
not connect any resistors in series or parallel with
clamp capacitors.
Analog Inputs/Outputs
Figures 4 and 5 show the signal flow diagrams for play-
back and record modes.
P
/R controls the mode of oper-
ation, while CVBSON and YCON select which outputs
are enabled. Table 1 shows the various combinations of
inputs and outputs that can be selected.
In playback mode, inputs IN1 and IN2 are active and
the outputs are selected by driving CVBSON and
YCON. IN1 receives the composite or luma (Y) signal
and level-shifts the signal by approximately 350mV at
the output such that the sync tip is below GND and the
active video is above GND. IN2 receives the chroma (C)
signal and level-shifts by approximately 500mV at the
output such that the signal is centered at GND. Drive
YCON high for outputs OUT1 and OUT2 to be active
and/or drive CVBSON high to combine IN1 and IN2 into
composite video and output on OUT3. Pull both control
inputs low to disable outputs and power down the output
buffers. OUT4 and OUT5 are always disabled in play-
back mode.
In record mode, drive YCON high and CVBSON low to
output Y/C format video on OUT4 and OUT5 or drive
CVBSON high and YCON low to output composite
video on OUT4. Pull both control inputs low to disable
OUT4 and OUT5 and power down the output buffers.
Driving both CVBSON and YCON high in record mode
results in an invalid state and all output buffers power
down. The Y signal inputs on IN3, C signal inputs on
IN4, and composite signal inputs on IN5. OUT4 is
shared between the composite signal and Y signal. The
composite or Y signal that outputs on OUT4 has the
blanking level set to GND with the sync tip below GND
and active video above GND. The C signal that outputs
on OUT5 is centered at GND. The outputs get level-
shifted by the bias of the video processor input after
the AC-coupling capacitors.
Bidirectional Video Filters/Buffers for Composite
and S-Video Portable Media Devices
8
_______________________________________________________________________________________
CVBSON
YCON
P/R
LPF
LPF
VIDEO
ADC
VIDEO
DAC
VIDEO
ADC
CONTROL
LOGIC
VIDEO
DAC
VIDEO
PROCESSOR
MAX7481
MAX7482
S4
S5
S1
S2
S3
S6
75
Ω
0.1
μ
F
75
Ω
75
Ω
0.1
μ
F
0.1
μ
F
S7
S8
Figure 3. Signal Flow Diagram
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX7482ETI+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX748AC/D | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 1.7mA Quiescent Current-Mode PWM DC-DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MAX748AC/D DIE | 制造商:Maxim Integrated Products 功能描述: |
| MAX748ACPA | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 3.3V Step-Down DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MAX748ACPA+ | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 3.3V Step-Down DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
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