Datasheet

www.ti.com
FEATURES DESCRIPTION
APPLICATIONS
DAC/
Encoder
(DaVinci )
TM
CVBS
Y’
C’
75 W
Y’
OUT
75 W
C’
OUT
75 W
3.3V
+1.8V
75 W
75 W
SDTV
CVBS
S-Video Y’
S-VideoC’
480i/576i
Y’P’ P’
G’B’R’
B R
75 W
S-Video
500 W
500 W
500 W
5
8
7
6
1
2
3
4
V
S+
GND
CH.2IN
CH.3IN
CH.1IN
CH.3OUT
CH.2OUT
CH.1OUT
THS7315
CVBS
OUT
Gain=
5.2V/V
THS7315
SLOS532 – JUNE 2007
3-Channel SDTV Video Amplifier with 5th-Order Filters and 5.2-V/V Gain
• Three SDTV Video Amplifiers for CVBS,
Fabricated using the revolutionary complementary
S-Video, Y'P'
B
P'
R
480i/576i, Y'U'V', or G'B'R'
silicon-sermanium (SiGe) BiCom3 process, the
(R'G'B')
THS7315 is a low-power, single-supply, 3-V to 5-V
3-channel integrated video buffer. It incorporates a
• Integrated Low-Pass Filters:
5th-order Butterworth filter that is useful as a
– 5th-Order, 8.5-MHz (–3dB) Butterworth
digital-to-analog converter (DAC) reconstruction filter
– –1dB Passband Bandwidth at 7 MHz
or an analog-to-digital converter (ADC) anti-aliasing
filter. The 8.5-MHz filter is a perfect choice for SDTV
– 47 dB Attenuation at 27 MHz
video, including Composite Video Baseband Signals
• Versatile Input Biasing:
(CVBS), S-Video, Y’U’V’, G’B’R’ (R’G’B’), and
– DC-Coupled with 230-mV Output Shift
Y’P’
B
P’
R
480i/576i.
– AC-Coupled with Sync-Tip Clamp
The THS7315 inputs can be either ac- or dc-coupled.
– Allows AC-Coupled With DC-Biasing
The 230-mV output level shift allows for a full sync
dynamic range at the output with 0 V input. The
• Built-in 5.2 V/V Gain (14.3 dB)
ac-coupled modes include a transparent sync-tip
• +3-V to +5-V Single Supply Operation
clamp option for CVBS, Y', and G'B'R' signals with
• Rail-to-Rail Output:
bottom-level sync. AC-coupled biasing for C'/P'
B
/P'
R
channels can easily be achieved by adding an
– Output Swings Within 100 mV of the Rails,
external resistor to V
S+
.
Allowing AC- or DC-Output Coupling
– Supports Driving Two Lines per Channel
The THS7315 is the perfect choice for all output
buffer applications. Its rail-to-rail output stage with
• Low Total Quiescent Current: 15.6 mA at 3.3 V
5.2-V/V gain allows for both ac and dc line driving,
• Low Differential Gain/Phase of 0.2%/0.3 °
making it a perfect choice for DaVinci™ processors.
• Lead-free, Green SOIC-8 Package
The ability for each channel to drive two video lines,
or 75- Ω loading, allows for maximum flexibility as a
video line driver. The 15.6-mA quiescent current at
3.3 V also makes it an excellent choice for
• Set Top Box Output Video Buffering
USB-powered, portable, or other power-sensitive
• PVR/DVDR Output Buffering
video applications
• USB/Portable Low-Power Video Buffering
The THS7315 is available in a small SOIC-8
package that is lead-free and compliant with green
requirements.
3.3-V Single-Supply DC-Input/DC-Output Coupled Video Line Driver
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.
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2007, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.