THS7368 Datasheet, PDF (1/39 Pages) Texas Instruments – 6-Channel Video Amplifier with 3-SD and 3-SD/ED/HD/Full-HD Filters and 6-dB Gain

THS7368
www.ti.com
SBOS497 – DECEMBER 2009
6-Channel Video Amplifier with 3-SD and 3-SD/ED/HD/Full-HD Filters and 6-dB Gain
Check for Samples: THS7368
FEATURES
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•2345 Three SDTV Video Amplifiers for CVBS,
S-Video, Y’/P’_B/P’_R, 480i/576i, Y’U’V’, or G'B'R'
• Three SD/ED/HD/Full-HD Selectable Filters for
Y’/P’_B/P’_R, G’B’R’, or Computer RGB
• Bypassable Sixth-Order Low-Pass Filters:
– Fixed SD Channels: 9.5-MHz
– Selectable Channels:
9.5-MHz/18-MHz/36-MHz/72-MHz
• Versatile Input Biasing:
– DC-Coupled with 300-mV Output Shift
– AC-Coupled with Sync-Tip Clamp or Bias
• Built-in 6-dB Gain (2 V/V)
• +2.7-V to +5-V Single-Supply Operation
• Rail-to-Rail Output:
– Output Swings Within 100 mV from the
Rails: Allows AC or DC Output Coupling
– Supports Driving Two Video Lines/Channel
• Low Total Quiescent Current: 23.4 mA at 3.3 V
• Disabled Supply Current Function: 0.1 μA
• Low Differential Gain/Phase: 0.2%/0.35°
APPLICATIONS
• Set Top Box Output Video Buffering
• PVR/DVDR Output Buffering
• BluRay™ Output Video Buffer
DESCRIPTION
Fabricated using the revolutionary, complementary
Silicon-Germanium (SiGe) BiCom3X process, the
THS7368 is a low-power, single-supply, 2.7-V to 5-V,
six-channel integrated video buffer. It incorporates
three SDTV filters and three selectable
SD/ED/HD/Full-HD (also known as True-HD) HDTV
filters. All filters feature bypassable sixth-order
Butterworth characteristics that are useful as
digital-to-analog converter (DAC) reconstruction filters
or as analog-to-digital converter (ADC) anti-aliasing
filters.
The THS7368 has flexible input coupling capabilities
that can be configured for either ac- or dc-coupled
inputs. The 300-mV output level shift allows for a full
sync dynamic range at the output with 0-V input. The
ac-coupled modes include a transparent sync-tip
clamp for CVBS, Y', and G'B'R' signals. AC-coupled
biasing for C'/P'_B/P'_R channels can easily be achieved
by adding an external resistor to V_S+.
The THS7368 is an ideal choice for all video buffer
applications. Its rail-to-rail output stage with 6-dB gain
allows for both ac and dc line driving. The ability to
drive two lines, or 75-Ω loads, allows for maximum
flexibility as a video line driver. The 23.4-mA total
quiescent current at 3.3 V and 0.1 μA (disabled
mode) makes it a good choice for systems that must
meet power-sensitive Energy Star^® standards.
The THS7368 is available in a TSSOP-20 package
that is lead-free and green (RoHS-compliant).
CVBS
S-Video
Y’
S-Video
C’
Y'/G'
P'_B/B'
P'_R/R'
THS7368
1 SD1 IN
SD1 OUT 20
R
2 SD2 IN
SD2 OUT 19
CVBS
75 W
S-Video Y' Out
75 W
75 W
3 SD3 IN
SD3 OUT 18
S-Video C' Out
R
Filter 2
4 Filter 2
Disable SD 17
Disable SD
75 W
75 W
+2.7 V to
+5 V
5 V_S+
GND 16
75 W
Filter 1
6 Filter 1
Disable SF 15
Disable SF
R
7 SF1 IN
SF1 OUT 14
Y'/G' Out
75 W
8 SF2 IN
SF2 OUT 13
R
9 SF3 IN
SF3 OUT 12
P'_B/B' Out
75 W
75 W
10 Bypass SD Bypass SF 11
P'_R/R' Out
R
75 W
75 W
Bypass
SD LPF
R
Bypass
SF LPF
75 W
Figure 1. Single-Supply, DC-Input/DC-Output Coupled Video Line Driver
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
BluRay is a trademark of Blu-ray Disc Association (BDA).
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Energy Star is a registered trademark of Energy Star.
3
Macrovision is a registered trademark of Macrovision Corporation.
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All other trademarks are the property of their respective owners.
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2009, Texas Instruments Incorporated