THS7373_10 Datasheet, PDF (1/50 Pages) Texas Instruments – 4-Channel Video Amplifier with 1-SD and 3-HD Sixth-Order Filters and 6-dB Gain

THS7373
www.ti.com
SBOS506 – DECEMBER 2009
4-Channel Video Amplifier with 1-SD and 3-HD Sixth-Order Filters and 6-dB Gain
Check for Samples: THS7373
FEATURES
1
•234 One SDTV Video Amplifier for CVBS Video
• Three HDTV Video Amplifiers for Y’/P’_B/P’_R,
720p/1080i/1080p30, or G’B’R’ (R’G’B’)
• Sixth-Order Low-Pass Filters:
– CVBS Channel: –3 dB at 9.5-MHz
– HD Channels: –3 dB at 36-MHz with
350-MHz Bypass for 1080p60 Support
• Versatile Input Biasing:
– DC-Coupled with 300-mV Output Shift
– AC-Coupled with Sync-Tip Clamp
– Allows AC-Coupling with Biasing
• Built-in 6-dB Gain (2 V/V)
• +3-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: 16.2 mA at 3.3 V
• Disabled Supply Current Function: 0.1 μA
• Low Differential Gain/Phase: 0.15%/0.25°
• RoHS-Compliant Package: TSSOP-14
APPLICATIONS
• Set Top Box Output Video Buffering
• PVR/DVDR/ BluRay™ Output Buffering
• Low-Power Video Buffering
DESCRIPTION
Fabricated using the revolutionary, complementary
Silicon-Germanium (SiGe) BiCom3X process, the
THS7373 is a low-power, single-supply, 3-V to 5-V,
four-channel integrated video buffer. It incorporates
one standard-definition (CVBS) and three
high-definition (HD) filter channels. All filters feature
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 HD filters can be bypassed to
support 1080p60 video or up to quad extended
graphics array (QXGA) RGB video.
As part of the THS7373 flexibility, the input can be
configured for 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 option for
composite video (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 THS7373 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 16.2-mA total
quiescent current at 3.3 V and 0.1 μA (disabled
mode) makes it an excellent choice for
power-sensitive video applications.
The THS7373 is available in a small TSSOP-14
package that is lead-free and green
(RoHS-compliant).
CVBS
R
Y'/G'
R
P’_B/B'
R
P’_R/R'
R
THS7373
1 CVBS IN
CVBS OUT 14
2 HD CH1 IN HD CH1 OUT 13
3 HD CH2 IN HD CH2 OUT 12
4 HD CH3 IN HD CH3 OUT 11
5 GND
6 DISABLE
V_S+ 10
HD BYPASS 9
7 NC
NC 8
CVBS Out
75 W
Y' Out
75 W
75 W ^{P'B Out}
To GPIO Controller
or GND
75 W ^{P'R Out}
+3 V to +5 V
75 W
75 W
75 W
75 W
Figure 1. Single-Supply, DC-Input/DC-Output Coupled Video Line Driver
1
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).
2
Macrovision is a registered trademark of Macrovision Corporation.
3
All other trademarks are the property of their respective owners.
4
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