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PDF OPA355 Data sheet ( Hoja de datos )
| Número de pieza | OPA355 | |
| Descripción | 3V Video Amplifier with 6dB Gain and Filter in SC70 | |
| Fabricantes | Burr-Brown | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de OPA355 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
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OPA360
SB0S294C − DECEMBER 2003 − REVISED JULY 2004
3V Video Amplifier
with 6dB Gain and Filter in SC70
FEATURES
D EXCELLENT VIDEO PERFORMANCE
D INTERNAL GAIN: 6dB
D 2−POLE RECONSTRUCTION FILTER
D SAG CORRECTION
− Reduces Coupling Capacitor Size
D INPUT RANGE INCLUDES GROUND
− DC-Coupled Input
D INTEGRATED LEVEL SHIFTER
− DC-Coupled Output(1)
− No Output Capacitors Needed
D RAIL-TO-RAIL OUTPUT
D LOW QUIESCENT CURRENT: 6mA
D SHUTDOWN CURRENT: 5mA
D SINGLE-SUPPLY: 2.7V to 3.3V
D SC70-6 PACKAGE: 2.0mm x 2.1mm
(1) Internal circuitry prevents the output from saturating, even with 0V sync
tip level at the input video signal.
APPLICATIONS
D DIGITAL CAMERAS
D CAMERA PHONES
D SET-TOP-BOX VIDEO FILTERS
RELATED LOW VOLTAGE VIDEO AMPS
FEATURES
2.7V to 5.5V, 200MHz GBW, 300V/µs, 6µA Sleep, SOT23
2.7V to 5.5V, RRIO, 150V/µs, 5mA IQ, 6µA Sleep, SOT23
2.7V to 3.3V, SC70, 70MHz, 6mA IQ, 5µA Sleep
2.7V to 3.3V, SC70, Filter, SAG, G = 12dB, 5µA Sleep
(1) Available Q4 2004.
PRODUCT
OPA355
OPA357
OPA358(1)
OPA361(1)
DESCRIPTION
The OPA360 high-speed amplifier is optimized for 3V
portable video applications. It has been specifically
designed to be compatible with digital-to-analog
converters (DACs) embedded in video processors, such
as Texas Instruments’ family of Digital Media Processors
and others. The input common-mode range includes
GND, which allows the Video-DAC to be DC-coupled to
the OPA360.
The output swings within 25mV of GND and 300mV to V+
with a standard back-terminated video load (150Ω). An
internal level shift circuit prevents the output from
saturating with 0V input, thus preventing sync-pulse
clipping in common video circuits. Therefore, the OPA360
is ideally suited for DC-coupling to the video load. If
AC-coupling is preferred, the OPA360 offers a
sag-correction feature that significantly reduces the size of
the output coupling capacitor.
The OPA360 has been optimized for space-sensitive
applications by integrating sag-correction, internal gain
setting resistors (G = 2), and a 2-pole video-DAC
reconstruction filter.
In shutdown mode, the quiescent current is reduced to
< 5µA, dramatically reducing power consumption and
prolonging battery life.
The OPA360 is available in the tiny 2mm x 2.1mm SC70-6
package.
V+ = 2.7V to 3.3V
V+
OPA360 Level
Shifter
VIN 2−Pole
Filter
ENABLE
6dB
VO
SAG
GND
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.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright 2003−2004, Texas Instruments Incorporated
www.ti.com
1 page  
www.ti.com
TYPICAL CHARACTERISTICS: VS = 3.3V (continued)
At TA = +25°C and RL = 150Ω, unless otherwise noted.
OPA360
SB0S294C − DECEMBER 2003 − REVISED JULY 2004
QUIESCENT CURRENT vs SUPPLY VOLTAGE
7
6
5
4
3
2
1
0
2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3
Supply Voltage (V)
QUIESCENT CURRENT vs TEMPERATURE
8.0
VS = 3.3V
7.5
7.0
6.5
6.0
5.5
5.0
−50 −25 0 25 50 75 100 125 150
Temperature (_C)
DIFFERENTIAL GAIN
DIFFERENTIAL PHASE
SHUTDOWN CURRENT vs TEMPERATURE
3.0
2.5
VS = 3.3V
2.0
1.5
1.0
0.5
0
−50
−25
0 25 50 75
Temperature (_C)
100 125
SHUTDOWN TRIGGER LEVELS
6
4
OPA360
Shutdown
2
OPA360
Active
LARGE−SIGNAL DISABLE/ENABLE RESPONSE
Enable
OPA360
Output
Disable
0
1.4
1.45 1.5 1.55
Enable Pin Voltage (V)
1.6
Time (1µs/div)
5
5 Page 
www.ti.com
SUPPLY VOLTAGE vs COUPLING CAPACITOR
The output voltage swing is a function of the coupling
capacitor value. The value of the sag correction capacitor
has only a minor influence. The smaller the coupling
capacitor, the greater the output swing. Therefore, to
accommodate the large signal swing with very small
coupling capacitors (22µF and 33µF), a higher supply
voltage might be needed.
OPA360
SB0S294C − DECEMBER 2003 − REVISED JULY 2004
As seen in Figure 7, the output swing with a 33µF coupling
capacitor is already very close to the saturation limit on a
3V supply. Over time and temperature, a capacitor might
change its value slightly, which in turn could force the
output into saturation. Using the 50Hz, 1/2 blackĊ1/2
white screen test signal as a worst−case analysis,
Figure 12 and Figure 13 demonstrate that a 3V supply
could be used with a coupling capacitor as low as 47µF.
Figure 12. Output Swing with 47mF on 3V Supply
Figure 13. Output Swing with 67mF on 3V Supply
V+ = 2.7V to 3.3V
Video
DAC
OPA360
2−Pole
(1) Filter
V+
Level
Shifter
GND
Enable
OUT
COUT
47µF
+
ROUT
75Ω
SAG
CSAG
22µF
+
AC Gain = 2
DC Gain = 2.8
NOTE: (1) Optional 200Ω for use with TI’s Digital Media Processors.
Figure 14. DC-Coupled Input/AC-Coupled Output
75Ω
Television
or VCR
11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet OPA355.PDF ] | |
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