www.ti.com
SLOS521 – MARCH 2007
3-Channel HDTV Video Amplifier With 5
th
-Order Filters and 6-dB Gain
FEATURES
•
•
3 HDTV Video Amplifiers for Y'P'
B
P'
R
720p and
1080i, G'B'R' (R'G'B'), VGA/SVGA/XGA
Integrated Low-Pass Filters
– 5
th
-Order 36-MHz (–3 dB) Butterworth Filter
– –1 dB Passband Bandwidth at 31 MHz
– 30 dB Attenuation at 74 MHz
Versatile Input Biasing
– DC-Coupled With 140-mV Input Shift
– AC-Coupled with Sync-Tip Clamp
– Allows AC-Coupled With Biasing
Built-in 6-dB Gain (2V/V)
3-V to 5-V Single Supply Operation
Rail-to-Rail Output:
– Output Swings Within 100 mV From the
Rails Allowing AC or DC Output Coupling
– Supports Driving 2 Lines per Channel
Low 18.3-mA at 3.3-V Total Quiescent Current
Low Differential Gain/Phase of 0.1% / 0.1°
SOIC-8 Package
DESCRIPTION
Fabricated using the Silicon-Germanium (SiGe)
BiCom-III process, the THS7316 is a low power
single-supply 3-V to 5-V, 3-channel integrated video
buffer. It incorporates a 5th-order modified
Butterworth filter which is useful as a DAC
reconstruction filter or an ADC anti-aliasing filter. The
36-MHz filter is a perfect choice for HDTV video
which includes Y'P'
B
P'
R
720p/1080i, G'B'R' (R'G'B'),
and VGA/SVGA/XGA signals.
As part of the THS7316 flexibility, the input can be
configured for ac or dc coupled inputs. The DC +
140-mV input offset shift to allow 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 signals with sync such as Y’ or Green with
sync. AC-coupled biasing for P’
B
/P’
R
/Non-sync
channels can be achieved by adding an external
resistor.
The THS7316 is the perfect choice for all output
buffer applications. Its rail-to-rail output stage with
6-dB gain allows for both ac and dc line driving. The
ability to drive 2 video lines per channel, or 75-Ω
loads, allows for maximum flexibility as a video line
driver. The 18.3-mA total quiescent current makes it
an excellent choice for USB powered, portable, or
other power sensitive video applications.
The THS7316 is available in a small SOIC-8
package that is RoHS compliant.
Y’ / G’ Out
75
W
•
•
•
•
•
•
•
•
•
•
APPLICATIONS
Set Top Box Output Video Buffering
PVR/DVDR Output Buffering
USB/Portable Low Power Video Buffering
3.3 V
DAC/
Encoder
Y’ / G’
R
1
P’
B
/ B’
R
P’
R
/ R’
R
3.3 V
2
3
4
75
W
THS7316
CH.1 IN
CH.2 IN
CH.3 IN
VS+
CH.1 OUT
CH.2 OUT
CH.3 OUT
GND
HDTV
720p/1080i
Y’P’
B
P’
R
G’B’R’
VGA
SVGA
XGA
8
7
6
5
75
W
P’
B
/ B’ Out
75
W
P’
R
/ R’ Out
75
W
75
W
Figure 1. 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.
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 © 2007, Texas Instruments Incorporated
TI [ TEXAS INSTRUMENTS ]
