Datasheet
In A
ADC/
Video
Decoder
3.3V
3.3V
LPF
AC
Sync
TIP
Clamp
DC
+
-
X1
DC+
250mV
MUTE
Bypass
2:1
1kW
250 W
AC -
BIAS
InB
InputB
Input A
I2C-
SDA
I2C-
SCL
9/16/
35MHz
Out
Gain
Adjust
0.1 Fm
0.1 Fm
0.1 Fm
75 W
75 W
1of3Channels
THS7353
www.ti.com
SLOS484B –NOVEMBER 2005–REVISED AUGUST 2012
3-Channel Low Power Video Buffer with I
2
C Control, Selectable Filters, External Gain
Control, 2:1 Input MUX, and Selectable Input Modes
Check for Samples: THS7353
1
FEATURES
APPLICATIONS
234
• 3-Video Buffers for CVBS, S-Video, SD/ED/HD
• HDTV Video Buffering
Y'P'
B
P'
R
, and G'B'R' (R'G'B') Video
• PVR/DVDR Video Buffering
• I
2
C™ Control of All Functions
• Projector Video Buffering
• Integrated Low-Pass Filters
• USB/Portable Low Power Video Buffering
– 5
th
Order Butterworth Characteristics
DESCRIPTION
– Selectable Corner Frequencies of 9-MHz,
Fabricated using the new complimentary silicon-
16-MHz, 35-MHz, and Bypass (150-MHz)
germanium (SiGe) BiCom-III process, the THS7353 is
• Selectable Input Bias Modes
a low-power, single-supply 2.7-V to 5-V, 3-channel
– AC-Coupled with Sync-Tip Clamp
integrated video buffer. It incorporates a selectable
5
th
order Butterworth anti-aliasing / DAC
– AC-Coupled with Bias
reconstruction filter to eliminate data converter
– DC-Coupled with 250-mV Input Shift
images. The 9-MHz is a perfect choice for SDTV
– DC-Coupled
video including composite, S-Video™, and 480i/576i
• 2:1 Input MUX Allows Multiple Input Sources
Y'P'
B
P'
R
or G'B'R' (R'G'B') video. The 16-MHz filter is
ideal for EDTV 480p/576p Y'P'
B
P'
R
, G'B'R', and VGA
• External Gain Control Range From
signals. The 35-MHz filter is useful for HDTV
0 dB to 14 dB
720p/1080i Y'P'
B
P'
R
, G'B'R', and SVGA/XGA signals.
• 2.7-V to 5-V Single Supply Operation
For 1080p or SXGA/UXGA signals, the filter can be
• Low 16.2-mA (3.3 V) Total Quiescent Current
bypassed allowing a 150-MHz bandwidth, 300-V/μs
amplifier to buffer the signal.
• Disable (< 1 μA) and Mute Control Functions
Each channel of the THS7353 is individually I
2
C
• Rail-to-Rail Output:
configurable for all functions which makes it flexible
– Allows AC or DC Output Coupling
for any application. Its rail-to-rail output stage allows
• Low Differential Gain/Phase of 0.15%/0.3°
for both ac and dc coupling applications. The
externally controlled gain adjust pin allows for fine
tuning of the gain such as line driving, compensating
for cable losses, or Sin-X/X compensation.
Figure 1. 3.3 V Single-Supply AC-Input/AC-Video Output System w/SAG Correction
(1 of 3 Channels Shown)
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.
2I
2
C is a trademark of NXP Semiconductors.
3S-Video is a trademark of of its respective owner.
4All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2005–2012, 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.