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参数资料
| 型号： | TVP5150AM1MPBSREP |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 颜色信号转换 |
| 英文描述： | COLOR SIGNAL DECODER, PQFP32 |
| 封装： | PLASTIC, TQFP-32 |
| 文件页数： | 6/79页 |
| 文件大小： | 896K |
| 代理商： | TVP5150AM1MPBSREP |
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3
Functional Description
3.1
Analog Front End
3.2
Composite Processing Block Diagram
TVP5150AM1-EP
Ultralow-Power NTSC/PAL/SECAM Video Decoder
SLES213 – MAY 2008
www.ti.com
The TVP5150AM1 decoder has an analog input channel that accepts two ac-coupled video inputs. The
decoder supports a maximum input voltage range of 0.75 V; therefore, an attenuation of one-half is
needed for most input signals with a peak-to-peak variation of 1.5 V. The maximum parallel termination
before the input to the device is 75
. See the application diagram in Figure 6-1 for the recommended
configuration. The two analog input ports can be connected as follows:
Two selectable composite video inputs or
One S-video input
An internal clamping circuit restores the ac-coupled video signal to a fixed dc level.
The programmable gain amplifier (PGA) and the automatic gain control (AGC) circuit work together to
make sure that the input signal is amplified sufficiently to ensure the proper input range for the ADC.
The ADC has nine bits of resolution and runs at a maximum speed of 27 MHz. The clock input for the
ADC comes from the PLL.
The composite processing block processes NTSC/PAL/SECAM signals into the YCbCr color space.
Figure 3-1 shows the basic architecture of this processing block.
Figure 3-1 shows the luminance/chrominance (Y/C) separation process in the TVP5150AM1 decoder. The
composite video is multiplied by subcarrier signals in the quadrature modulator to generate the color
difference signals Cb and Cr. Cb and Cr are then low pass (LP) filtered to achieve the desired bandwidth
and to reduce crosstalk.
An adaptive four-line comb filter separates CbCr from Y. Chroma is remodulated through another
quadrature modulator and subtracted from the line-delayed composite video to generate luma. Contrast,
brightness, hue, saturation, and sharpness (using the peaking filter) are programmable via I2C.
The Y/C separation is bypassed for S-video input. For S-video, the remodulation path is disabled.
Functional Description
14
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TVP5150AM1PBS | 功能描述:视频 IC NTSC/PAL/SECAM VIDEO DECODER 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 |
| TVP5150AM1PBSG4 | 功能描述:视频 IC NTSC/PAL/SECAM VIDEO DECODER 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 |
| TVP5150AM1PBSR | 功能描述:视频 IC Ultralo Pwr NTSC/PAL SECAM Vid Decoder 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 |
| TVP5150AM1PBSRG4 | 功能描述:视频 IC Ultralo Pwr NTSC/PAL SECAM Video Decoder 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 |
| TVP5150AM1ZQC | 功能描述:视频 IC Ultralo Pwr NTSC/PAL SECAM Vid Decoder 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 |
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