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参数资料
| 型号： | MAX9512ATE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 3/19页 |
| 文件大小： | 0K |
| 描述： | IC VIDEO FILTER AMP 16-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 应用： | 滤波器 |
| 电路数： | 1 |
| 电流 - 电源： | 13mA |
| 电压 - 电源，单路/双路(±)： | 2.7 V ~ 3.6 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WFQFN 裸露焊盘 |
| 供应商设备封装： | 16-TQFN-EP（3x3） |
| 包装： | 标准包装 |
| 产品目录页面： | 1424 (CN2011-ZH PDF) |
| 其它名称： | MAX9512ATE+TDKR |
MAX9512
Video Filter Amplifier with SmartSleep
and Y/C Mixer Circuit
______________________________________________________________________________________
11
Active-Detect Mode
The active video detect circuit slices the YIN signal at
4.7% of the power supply (155mV for a 3.3V supply). If
the transitions occur at a rate of 14.3kHz or higher,
then a video signal is present. When the MAX9512
detects a video signal with sync at the YIN input, the
control logic enters the active-detect mode and
enables the load sense circuitry (Figure 3). The supply
current is typically 17A.
If an output load is not connected to any amplifier, the
MAX9512 remains in active-detect mode. Eight times per
second, each load-sense circuit checks for a load by
connecting an internal 15kΩ pullup resistor to the output
for 1ms. If the output is pulled up, then no load is pre-
sent. If the output stays low, a load is connected.
Full-Operation Mode
If a load is connected to an output, the corresponding
filter and amplifier turn on and remain on until the out-
put load is disconnected. In full-operation mode,
SmartSleep intelligently reduces the supply current
based on the input signal presence and output loading.
Figures 4 and 5 show which portions of the MAX9512
turn on and which remain off with different load configu-
rations. In Figure 4, both filters and the Y/C mixer turn
on to generate the composite video signal for the ampli-
fier connected to CVBSOUT1. In Figure 5, only the luma
filter turns on, and the Y/C mixer stays off.
When an amplifier is on, it continually checks if the load
has been disconnected by detecting if the amplifier
output is sourcing current during a horizontal line time.
If no sourcing current is detected within one horizontal
line time (approximately 64s), the load has been dis-
connected and the amplifier returns to active-detect
mode. If, at any time, the input video signal is removed,
the MAX9512 returns to standby mode.
If the SmartSleep feature is not activated and the part is
not in shutdown, then the filters and amplifiers com-
pletely turn on, regardless of whether there is a video
signal at the CVBSIN input and whether there are loads
connected at the outputs.
CVBS1
CIN
YIN
COUT
YOUT
CVBSOUT1
CVBSOUT2
LPF
GND
LOAD SENSE
6dB
75
Ω
75
Ω
LPF
BUFFER
LOAD SENSE
BUFFER
6dB
LOAD SENSE
6dB
75
Ω
LOAD SENSE
6dB
75
Ω
MAX9512
CHROMA
LUMA
NO
LOADS
CURRENT
DAC
CURRENT
DAC
VIDEO ENCODER
OFF
CVBS2
SHDN
SMARTSLEEP
CONTROL
LOGIC
ACTIVE VIDEO
DETECT
+3.3V
VDD
17
μA
VIDEO SIGNAL
PRESENT
0
TO
50mV
Figure 3. Active-Detect Mode with No Output Loads
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9513ATE+ | 功能描述:视频放大器 CVBS Video Filter Amplifier RoHS:否 制造商:ON Semiconductor 通道数量:4 电源类型: 工作电源电压:3.3 V, 5 V 电源电流: 最小工作温度: 最大工作温度: 封装 / 箱体:TSSOP-14 封装:Reel |
| MAX9513ATE+T | 功能描述:视频放大器 CVBS Video Filter Amplifier RoHS:否 制造商:ON Semiconductor 通道数量:4 电源类型: 工作电源电压:3.3 V, 5 V 电源电流: 最小工作温度: 最大工作温度: 封装 / 箱体:TSSOP-14 封装:Reel |
| MAX9513EVKIT+ | 制造商:Maxim Integrated Products 功能描述:MAX9513 EVAL KIT - Rail/Tube |
| MAX9515ABS+T | 功能描述:视频放大器 Video Filter Amp RoHS:否 制造商:ON Semiconductor 通道数量:4 电源类型: 工作电源电压:3.3 V, 5 V 电源电流: 最小工作温度: 最大工作温度: 封装 / 箱体:TSSOP-14 封装:Reel |
| MAX9515ABS+TG45 | 制造商:Maxim from Components Direct 功能描述:MAXIM MAX9515ABS+TG45 VIDEO AMPLIFIERS - Tape and Reel 制造商:Maxim 功能描述:Maxim MAX9515ABS+TG45 Video Amplifiers |
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