參數(shù)資料
型號： THS7375IPWRG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 音頻／視頻放大
英文描述： VIDEO AMPLIFIER, PDSO14
封裝： GREEN, PLASTIC, TSSOP-14
文件頁數(shù)： 13/39頁
文件大?。?/td> 973K
代理商： THS7375IPWRG4
75 W
Y'/G'Out
CVBS/Sync
CVBS
+3.3V
R
DaVinci
DAC/Encoder
SDTV
CVBS
S-Video
Y'P' P'
R'G'B'
B
R
Y'/G'
R
P’ /B'
B
R
P’ /R'
R
1
2
3
4
5
6
7
14
13
12
11
10
9
8
CH1OUT
CH2OUT
CH3OUT
CH4OUT
V
S+
BYPASS
NC
CH1IN
CH2IN
CH3IN
CH4IN
GND
DISABLE
NC
THS7375
ToGPIOController
orGND
75 W
P' /B'Out
B
75 W
P' /R'Out
R
75 W
+
330 F
m
330 F
m
330 F
m
330 F
m
+3Vto+5V
SBOS449A – SEPTEMBER 2008 – REVISED JANUARY 2011
www.ti.com
TYPICAL CONFIGURATION AND VIDEO
This rationale is also used for the chroma (C') term.
TERMINOLOGY
Chroma is derived from the nonlinear R'G'B' terms
and thus it is also nonlinear. Chominance (C) is
A typical application circuit that uses the THS7375 as
derived from linear RGB, giving the difference
a video buffer is shown in Figure 48. It shows a DAC
between chroma (C') and chrominance (C). The color
or
encoder
driving
the
input
channels
of
the
difference signals (P'B/P'R/U'/V') are also referenced
THS7375. One channel is a composite video (CVBS)
in
this
way
to
denote
the
nonlinear
(gamma
channel of a standard definition (SD) video system.
corrected) signals.
The other channels are the component video Y'P'BP'R
(sometimes labeled Y'U'V' or incorrectly labeled
R'G'B' (commonly mislabeled RGB) is also called
Y'C'BC'R) signals of a 480i or 576i system. These
G'B'R' (again commonly mislabeled as GBR) in
channels could easily be the S-Video Y'/C' channels
professional video systems. The SMPTE component
or the R'G'B' channels of a SCART system.
standard stipulates that the luma information is
placed on the first channel, the blue color difference
Note that the Y' term is used for the luma channels
is placed on the second channel, and the red color
throughout this document rather than the more
difference signal is placed on the third channel. This
common luminance (Y) term. The reason for this
configuration
is
consistent
with
the
Y'P'BP'R
usage is to account for the definition of luminance as
nomenclature. Because the luma channel (Y') carries
stipulated
by
the
the sync information and the green channel (G') also
Illumination (CIE). Video departs from true luminance
carries the sync information, it makes logical sense
because a nonlinear term, gamma, is added to the
that G' be placed first in the system. Furthermore,
true RGB signals to form R'G'B' signals. These R'G'B'
because the blue color difference channel (P'B) is
signals are then used to mathematically create luma
next and the red color difference channel (P'R) is last,
(Y'). Thus, luminance (Y) is not maintained, providing
then it also makes logical sense to place the B' signal
a difference in terminology.
on the second channel and the R' signal on the third
channel respectfully. Thus, hardware compatibility is
better achieved when using G'B'R' rather than R'G'B'.
Note that for many G'B'R' systems, sync is embedded
on all three channels, but this configuration may not
always be the case in all systems.
Figure 48. Typical SDTV CVBS/Y'P'BP'R Inputs from DC-Coupled Encoder/DAC
with AC-Coupled Line Driving
20
Copyright 2008–2011, Texas Instruments Incorporated
Product Folder Link(s): THS7375
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
THS7376 制造商:TI 制造商全稱:Texas Instruments 功能描述:4-Channel Video Amplifier with One SD and Three HD 8th-Order Filters with 6-dB Gain
THS7376IPW 制造商:Texas Instruments 功能描述:4-Channel Video Amplifier 1SD 3HD 制造商:Texas Instruments 功能描述:IC SDTV VIDEO AMP 4-CH 14-TSSOP
THS7376IPWR 制造商:Texas Instruments 功能描述:4-Channel Video Amplifier 1SD 3HD
THS7380IZSYR 制造商:Texas Instruments 功能描述: 制造商:Texas Instruments 功能描述:AMPLIFIER-NON VMI
THS7381IZSYR 制造商:Texas Instruments 功能描述:
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