THS7313 Datasheet, PDF (1/48 Pages) Texas Instruments – 3-Channel Low Power SDTV Video Amplifier with I2C Control, 6-dB Gain, SAG Correction, 2:1 Input MUX, and Selectable Input Bias Modes

THS7313
www.ti.com
SLOS483 – NOVEMBER 2005
3-Channel Low Power SDTV Video Amplifier with I²C Control, 6-dB Gain, SAG
Correction, 2:1 Input MUX, and Selectable Input Bias Modes
FEATURES
• 3 SDTV Video Amplifiers for CVBS, S-Video,
Y'P'_BP'_R 480i/576i, or G'B'R' Video Systems
• I²C™ Control of All Functions on Each
Channel
• Integrated Low-Pass Filters
– 5^th Order, 8-MHz Butterworth
• 0.5-dB Attenuation at 5.5 MHz
• 48-dB Attenuation at 27 MHz
• Selectable Input Bias Modes
– AC-Coupled with Sync-Tip Clamp
– AC-Coupled with Bias
– DC-Coupled with 135-mV Input Shift
– DC-Coupled
• 2:1 Input MUX Allows Multiple Input Sources
• Built-in 6-dB Gain (2 V/V)
• SAG Correction Capable
• 2.7-V to 5-V Single Supply Operation
• Individual Disable (<1 µA) and Mute Control
• Rail-to-Rail Output:
– Output Swings within 100 mV from the Rails
Which Allows AC or DC Output Coupling
– Able to Drive up to 2 Video Lines – 75 Ω
• Low 16.6-mA (3.3 V) Total Quiescent Current
• Low Differential Gain/Phase of 0.07% / 0.12°
APPLICATIONS
• Set Top Box Output Video Buffering
• PVR/DVDR Output Buffering
• USB/Portable Low Power Video Buffering
DESCRIPTION
Fabricated using the new complimentary
silicon-germanium (SiGe) BiCom-III process, the
THS7313 is a low-power, single-supply 2.7-V to 5-V,
3-channel integrated video buffer. It incorporates a 5^th
order Butterworth filter which is useful as a
digital-to-analog converter (DAC) reconstruction filter
or an analog-to-digital converter (ADC) anti-aliasing
filter. The 8-MHz filter is a perfect choice for SDTV
video which includes composite (CVBS), S-Video,
Y’U’V’, G'B'R', and Y’P’_BP’_R 480i/576i.
Each channel of the THS7313 is individually I²C
configurable for all functions which makes it flexible
for any application. Its rail-to-rail output stage allows
for both ac and dc coupling applications. The 6-dB
gain along with the built-in SAG correction allows for
maximum flexibility as an output video buffer.
The 16.6 mA total quiescent current at 3.3 V (55 mW)
makes it an excellent choice for USB powered or
portable video applications. While fully disabled, the
THS7313 consumes less than 1 µA.
The THS7313 is available in a small lead-free and
RoHS compliant TSSOP-20 package.
3.3 V
Video
DAC /
Encoder
External
Input
In A
In B
R
75 W
2:1
X1
DC +
135 mV
DC
AC -
BIAS
AC
Sync
TIP
Clamp
MUTE
LPF
8 MHz
1 kW
+
-
878 W
47 mF
Out
675 W
SAG
150 W
33 mF
75 W
SDA SCL I2C-A1
I2C-A0
3.3 V
Figure 1. 3.3 V Single-Supply DC-Input/AC-Video Output System w/SAG Correction
(1 of 3 Channels Shown)
Video
Out
75 W
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.
I²C is a trademark of Philips Electronics.
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 © 2005, Texas Instruments Incorporated