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參數(shù)資料
| 型號： | MAX9532AUB+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 13/13頁 |
| 文件大小： | 0K |
| 描述： | IC AMP VID DIRECTDRIVE 10-MSOP |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 50 |
| 系列： | DirectDrive® |
| 應用： | 車載系統(tǒng) |
| 電路數(shù)： | 1 |
| 電流 - 電源： | 15mA |
| 電流 - 輸出 / 通道： | 90mA |
| 電壓 - 電源，單路/雙路(±)： | 3 V ~ 3.6 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 10-TFSOP，10-MSOP（0.118"，3.00mm 寬） |
| 供應商設備封裝： | 10-µMAX |
| 包裝： | 管件 |
| 配用： | MAX9532EVKIT+-ND - EVALUATION KIT FOR MAX9532 |
Interfacing to Video DACs that Produce
Video Signals Higher than 0.5VP-P
Devices designed to generate 1VP-P video signals at
the output of the video DAC can work with the
MAX9532. Most video DACs source current into a
ground-referenced resistor, which converts the current
into a voltage. Figure 3 shows a video DAC that creates
a video signal from 0V to 1V across a 150
Ω resistor.
With a gain of 2V/V, the following video filter produces a
2VP-P output.
The MAX9532 accepts input signals that are 0.5VP-P
nominally. The video DAC in Figure 3 can be made to
work with the MAX9532 by scaling down the 150
Ω
resistor to a 75
Ω resistor, as shown in Figure 4. The
75
Ω resistor is one-half the size of the 150Ω resistor,
resulting in a video signal that is one-half the amplitude.
Video Source with a Positive DC Bias
In some applications, the video source generates a sig-
nal with a positive DC voltage bias, i.e., the sync tip of
the signal is well above ground. Figure 5 shows an
example in which the outputs of the luma (Y) DAC and
the chroma (C) DAC are connected together. Since the
DACs are current-mode, the output currents sum
together into the resistor, which converts the resulting
current into a voltage representing a composite video
signal.
When the chroma DAC is connected to an independent
output resistor to ground, the chroma signal, which is a
carrier at 3.58MHz for NTSC or at 4.43MHz for PAL,
generates a positive DC bias to keep the signal above
ground at all times. When the luma DAC is connected
to an independent output resistor to ground, the luma
signal usually does not have a positive DC bias, and
the sync tip is at approximately ground. When the chro-
ma and luma signals are added together, the resulting
composite video signal generates a positive DC bias.
Therefore, the signal must be AC-coupled into the
MAX9532 because the composite video signal is above
the nominal 0V to 0.7V DC-coupled input range.
Video Signal Routing
Minimize the length of the PCB trace between the out-
put of the video DAC and the input of the MAX9532 to
reduce coupling of external noise into the video signal.
If possible, shield the PCB trace.
MAX9532
DirectDrive Video Amplifier with
Short-to-Battery Protection
_______________________________________________________________________________________
9
LPF
DAC
IMAGE
PROCESSOR
ASIC
2V/V
150
Ω
0V TO 1V
GENERIC 2V/V CONFIGURATION
2VP-P
Figure 3. Typically, a Video DAC Generates a 1VP-P Signal
Across a 150
Ω Resistor Connected to Ground
LPF
2VP-P
DAC
IMAGE
PROCESSOR
ASIC
4V/V
75
Ω
0V TO 0.5V
MAX9532
Figure 4. Video DAC Generates a 0.5VP-P Signal Across a 75Ω
Resistor Connected to Ground
VIDEO SIGNAL
MAX9532 POWER CONSUMPTION (mW)
WITH 150
Ω LOAD
MAX9532 POWER CONSUMPTION (mW)
WITH 100
Ω LOAD
All Black Screen
51.236
53.978
All White Screen
57.077
65.399
75% Color Bars
53.074
57.486
50% Flat Field
49.513
51.596
Table 1. Power Consumption of the MAX9532 with Different Video Signals
Note: The supply voltage is 3.3V.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9532AUB+ | 功能描述:視頻放大器 DirectDrive Video Amplifier RoHS:否 制造商:ON Semiconductor 通道數(shù)量:4 電源類型: 工作電源電壓:3.3 V, 5 V 電源電流: 最小工作溫度: 最大工作溫度: 封裝 / 箱體:TSSOP-14 封裝:Reel |
| MAX9532AUB+T | 功能描述:視頻放大器 DirectDrive Video Amplifier RoHS:否 制造商:ON Semiconductor 通道數(shù)量:4 電源類型: 工作電源電壓:3.3 V, 5 V 電源電流: 最小工作溫度: 最大工作溫度: 封裝 / 箱體:TSSOP-14 封裝:Reel |
| MAX9532EVKIT+ | 功能描述:放大器 IC 開發(fā)工具 MAX9532 Eval Kit RoHS:否 制造商:International Rectifier 產(chǎn)品:Demonstration Boards 類型:Power Amplifiers 工具用于評估:IR4302 工作電源電壓:13 V to 23 V |
| MAX9539EUI | 制造商:Maxim Integrated Products 功能描述: |
| MAX9539EUI+ | 功能描述:視頻 IC Graphics Video Sync Adder/Extractor 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 |
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