參數(shù)資料
型號(hào): TVP5031PFP
廠商: TEXAS INSTRUMENTS INC
元件分類: 顏色信號(hào)轉(zhuǎn)換
英文描述: COLOR SIGNAL DECODER, PQFP80
封裝: POWER, PLASTIC, TQFP-80
文件頁數(shù): 9/92頁
文件大?。?/td> 415K
代理商: TVP5031PFP
2–1
2 Functional Description
2.1
Analog Video Processing and A/D Converters
Figure 2–1 shows a functional diagram of the analog video preprocessor and A/D converter. This block provides the
analog interface to all the video inputs. It accepts up to two inputs and performs source selection, video clamping,
video amplification, analog-to-digital conversion, and fine gain and offset adjustments to center the digitized video
signal.
M
U
X
VI_1A
CH1_MUX_CTRL
0.1
F
VI_1B
0.1
F
CLAMP
CH1_CLAMP_MODE
BANDGAP
+
AGC
CH1_GAIN_OFFSET
FINE GAIN,
OFFSET
ADJUST
ADC
CLK
+
9
BITS
CH1_FINE_ADJUST
9
BITS
CH1_OUT
+
ADC REF
BUFFER
CLAMP
BUFFER
1.0
F
0.1
F
0.1
F
4.7
F
4.7
F
1.0
F
CLAMP1
BG
CLAMP2
REFP
REFM
TVP5031 ANALOG FRONT END
SCLK
Figure 2–1. Analog Video Processors and A/D Converters
2.1.1
Video Input Selection
The TVP5031 has one analog channel that accepts two video inputs ac coupled through 0.1
F capacitors. The
internal video multiplexers can be configured via the host port. The two analog video inputs may be connected as
two selectable individual composite video inputs.
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