THS7375 Datasheet, PDF (1/36 Pages) Texas Instruments – 4-Channel SDTV Video Amplifier with 6th-Order Filters and 5.6-V/V Gain

THS7375
THS7375
www.ti.com......................................................................................................................................................................................... SBOS449 – SEPTEMBER 2008
4-Channel SDTV Video Amplifier with 6th-Order Filters and 5.6-V/V Gain
FEATURES
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•23 Four SDTV Video Amplifiers for CVBS,
S-Video, Y'P'_BP'_R 480i/576i, Y'U'V', G'B'R'
(R'G'B'), or SCART
• Integrated Low-Pass Filters:
– Sixth-Order 9.5-MHz (–3dB) Butterworth
– –0.1-dB Bandwidth at 6 MHz
– –1-dB Passband Bandwidth at 8 MHz
– 54-dB Attenuation at 27 MHz
• Versatile Input Biasing
– DC-Coupled with 320-mV Output Shift
– AC-Coupled with Sync-Tip Clamp
– AC-Coupled with Biasing Allowed
• Built-in 5.6-V/V Gain (14.95 dB)
• +3-V to +5-V Single-Supply Operation
• Rail-to-Rail Output:
– Output Swings Within 100 mV from the
Rails to Allow AC or DC Output Coupling
– Supports Driving Two Lines per Channel
• Low 9.8-mA at 3.3-V Total Quiescent Current
• Low Differential Gain/Phase of 0.2%/0.35°
• Lead-Free and Green TSSOP-14 Package
APPLICATIONS
• Set Top Box Output Video Buffering
• Portable Media Player Video Buffering
• Security/Surveillance Systems
• DaVinci/OMAP/DMxxx Video Buffering
DESCRIPTION
Fabricated using the revolutionary complementary
Silicon-Germanium (SiGe) BiCom3X process, the
THS7375 is a low-power, single-supply, 3 V to 5 V
four-channel integrated video buffer. It incorporates a
sixth-order Butterworth filter (able to be bypassed)
that is useful as a digital-to-analog converter (DAC)
reconstruction filter or an analog-to-digital converter
(ADC) anti-aliasing filter. The 9.5-MHz filter is a
perfect choice for SDTV video that includes
composite (CVBS), S-video, Y'U'V', G'B'R' (R'G'B'),
Y'P'_BP'_R 480i/576i, and SCART systems.
As part of the THS7375 flexibility, the input can be
configured for either ac or dc-coupled inputs. The
320-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 CVBS, Y', and G'B'R' signals with
sync. AC-coupled biasing for C'/P'_B/P'_R channels can
easily be achieved by adding an external resistor to
V_S+.
The THS7375 is the perfect choice for all video buffer
applications. Its rail-to-rail output stage with 5.6-V/V
gain allows for both ac and dc line driving. This
architecture makes the THS7375 an ideal choice for
DaVinci™ processors. The ability to drive two lines
per channel, or 75-Ω loads, allows for maximum
flexibility as a video line driver. The 9.8-mA total
quiescent current at 3.3 V and 0.1-µA disabled
current makes it an excellent choice for
USB-powered, portable, or other power-sensitive
applications.
The THS7375 is available in a TSSOP-14 package
that is lead-free and green (RoHS) compliant.
+1.8 V
CVBS
R
Y'/G'
R
DaVinci
DMxxxx
P’_B/B'
R
P’_R/R'
R
THS7375
1 CH1 IN CH1 OUT 14
2 CH2 IN CH2 OUT 13
3 CH3 IN CH3 OUT 12
4 CH4 IN CH4 OUT 11
5 GND
V_S+ 10
6 DISABLE BYPASS 9
7 NC
NC 8
CVBS/Sync
75 W
Y'/G' Out
75 W
P'_B/B' Out
75 W
To GPIO Controller
or GND
+3 V to +5 V
P'_R/R' Out
75 W
75 W
75 W
75 W
75 W
Figure 1. 3.3-V 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.
DaVinci is a trademark of Texas Instruments Incorporated.
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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 © 2008, Texas Instruments Incorporated