參數(shù)資料
型號(hào): THS7364IPWR
廠商: TEXAS INSTRUMENTS INC
元件分類: 音頻/視頻放大
英文描述: 6 CHANNEL, VIDEO AMPLIFIER, PDSO20
封裝: GREEN, PLASTIC, TSSOP-20
文件頁數(shù): 21/47頁
文件大?。?/td> 1134K
代理商: THS7364IPWR
75 W
S-VideoY'Out
CVBS
R
SOC/DAC/Encoder
S-Video Y’
R
S-Video C’
R
Y'/G'
R
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
SD1OUT
SD2OUT
SD3OUT
DisableSD
GND
Disable FHD
FHD1OUT
FHD2OUT
FHD3OUT
Bypass FHD
SD1IN
SD2IN
SD3IN
NC
V
S+
NC
FHD1IN
FHD2IN
FHD3IN
BypassSD
THS7364
Bypass
SDLPF
Bypass
LPF
FHD
P' /B'
B
R
CVBS
P' /R'
R
75 W
S-VideoC'Out
75 W
Y'/G'Out
75 W
P' /B'Out
B
75 W
P' /R'Out
R
75 W
+2.7Vto
+5V
Disable FHD
DisableSD
SBOS530 – AUGUST 2010
www.ti.com
TYPICAL CONFIGURATION AND VIDEO
the definition of luminance as stipulated by the
TERMINOLOGY
departs from true luminance because a nonlinear
A typical application circuit using the THS7364 as a
term, gamma, is added to the true RGB signals to
video buffer is shown in Figure 77. It shows a DAC or
form R’G’B’ signals. These R’G’B’ signals are then
encoder driving the input channels of the THS7364.
used to mathematically create luma (Y’). Thus,
One channel is a CVBS connection while two other
luminance
(Y)
is
not
maintained,
providing
a
channels are for the S-Video Y’/C’ signals of an SD
difference in terminology.
video system. These signals can be NTSC, PAL, or
SECAM signals. The other three channels are the
This rationale is also used for the chroma (C’) term.
component
video
Y’/P’B/P’R (sometimes labeled
Chroma is derived from the nonlinear R’G’B’ terms
Y’U’V’ or incorrectly labeled Y’/C’B/C’R) signals. These
and, thus, it is nonlinear. Chominance (C) is derived
signals are typically 480i, 576i, 480p, 576p, 720p,
from linear RGB, giving the difference between
1080i, or up to 1080p60 signals. Because the filters
chroma
(C’)
and
chrominance
(C).
The
color
can be bypassed, other formats such as R'G'B' video
difference signals (P’B/P’R/U’/V’) are also referenced
up to QXGA or UWXGA can also be supported with
in this manner to denote the nonlinear (gamma
the THS7364.
corrected) signals.
Note that the Y’ term is used for the luma channels
throughout this document rather than the more
common luminance (Y) term. This usage accounts for
(1)
Figure 77. Typical Six-Channel System Inputs from DC-Coupled Encoder/DAC with DC-Coupled Line
Driving
28
Copyright 2010, Texas Instruments Incorporated
Product Folder Link(s): THS7364
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