参数资料
型号: TVP5147PFPRG4
厂商: TEXAS INSTRUMENTS INC
元件分类: 颜色信号转换
英文描述: COLOR SIGNAL DECODER, PQFP80
封装: GREEN, PLASTIC, HTQFP-80
文件页数: 9/100页
文件大小: 1465K
代理商: TVP5147PFPRG4
Functional Description
9
SLES099C—March 2007
TVP5147PFP
2
Functional Description
2.1
Analog Processing and A/D Converters
Figure 21 shows a functional diagram of the analog processors and A/D converters, which provide the analog
interface to all video inputs. It accepts up to 10 inputs and performs source selection, video clamping, video
amplification, A/D conversion, and gain and offset adjustments to center the digitized video signal. The
TVP5147 supports one analog video output for the selected analog input video.
Clamp
CH1 A/D
Line-Locked
Sampling Clock
VI_4_A
M
U
X
VI_1_B
VI_1_C
M
U
X
VI_2_A
VI_2_B
VI_2_C
M
U
X
VI_3_A
VI_3_B
VI_3_C
11-Bit
ADC
Clamp
VI_1_A
I/O
PGA
CVBS/
Pb/C
CVBS/
Y
CVBS/
Pr/C
CVBS/
Y
M
U
X
PGA
CH2 A/D
11-Bit
ADC
PGA
Analog Front End
Figure 21. Analog Processors and A/D Converters
2.1.1 Video Input Switch Control
The TVP5147 decoder has two analog channels that accept up to 10 video inputs. The user can configure
the internal analog video switches via the I2C interface. The 10 analog video inputs can be used for different
input configurations, some of which are:
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