Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLinear ICsLinear IC - Amplifier - Video buffering Rail-to-rail 9 MHz SC 70 6

FEATURES

D EXCELLENT VIDEO PERFORMANCE

D INTERNAL GAIN: 5.2V/V

D SUPPORTS TV-DETECTION

D COMPATIBLE WITH OMAP242x and

DAVINCIE PROCESSORS

D 2-POLE RECONSTRUCTION FILTER

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: 5.3mA

D SHUTDOWN CURRENT: 1.5mA

D SINGLE-SUPPLY: 2.5V to 3.3V

D SC70-6 PACKAGE: 2.0mm x 2.1mm

D RoHS COMPLIANT

(1)

Internal circuitry avoids output saturation, even with 0V sync tip

level at the input video signal.

APPLICATIONS

D CAMERA PHONES

DESCRIPTION

The OPA361 high-speed amplifier is optimized for 3V

portable video applications. It is specifically designed to be

compatible with the video encoders embedded in Texas

Instruments’ OMAP2420 and DaVinci processors or other

application processors with 0.5V

video output. The input

common-mode range includes GND, which allows a

video-DAC (digital-to-analog converter) to be DC-coupled

to the OPA361. The TV-detection feature simplifies the

end-user interface significantly by facilitating the

automatic start/stop of video transmission.

The output swings within 5mV of GND and 250mV 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 OPA361

is ideally suited for DC-coupling to the video load.

The OPA361 has been optimized for space-sensitive

applications by integrating internal gain setting resistors

(G = 5.2V/V) and a 2-pole video-DAC reconstruction filter.

In shutdown mode, the quiescent current is reduced to

< 1.5µA, dramatically reducing power consumption and

prolonging battery life.

The OPA361 is available in the tiny 2mm x 2.1mm SC70-6

package.

Summary of content (17 pages)

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OPA361 SBOS334A − SEPTEMBER 2005 − REVISED JANUARY 2006 3V VIDEO AMPLIFIER with Internal Gain and Filter in SC70 FEATURES D D D D DESCRIPTION EXCELLENT VIDEO PERFORMANCE INTERNAL GAIN: 5.2V/V SUPPORTS TV-DETECTION COMPATIBLE WITH OMAP242x and DAVINCIE PROCESSORS 2-POLE RECONSTRUCTION FILTER The OPA361 high-speed amplifier is optimized for 3V portable video applications.
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"#$ www.ti.com SBOS334A − SEPTEMBER 2005 − REVISED JANUARY 2006 ORDERING INFORMATION(1) PRODUCT PACKAGE PACKAGE DESIGNATOR OPA361 SC70-6 DCK PACKAGE MARKING AUY (1) For the most current package and ordering information, see the Package Option Addendum at the end of this datasheet, or see the TI website at www.ti.com. This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions.
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"#$ www.ti.com SBOS334A − SEPTEMBER 2005 − REVISED JANUARY 2006 ELECTRICAL CHARACTERISTICS: VS = +2.5V to +3.3V Boldface limits apply over the temperature range, TA = −40°C to +125°C. At TA = +25°C, RL = 150Ω connected to GND, unless otherwise noted. OPA361 PARAMETER CONDITIONS MIN VS = +2.8V, VIN = GND −3 TYP MAX 11 55 UNITS OFFSET LEVEL-SHIFT VOLTAGE Output Level-Shift Voltage(1) VOLS Over Temperature vs Power Supply PSRR VS = +2.5V to +3.
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"#$ www.ti.com SBOS334A − SEPTEMBER 2005 − REVISED JANUARY 2006 TYPICAL CHARACTERISTICS: VS = 2.8V At TA = +25°C and RL = 150Ω, unless otherwise noted. RIN vs TEMPERATURE RSET vs TEMPERATURE 535 4250 530 4200 525 4150 RSET (Ω) RIN (Ω) 520 515 510 4100 4050 505 4000 500 3950 495 −50 −25 0 +25 +50 +75 +100 −50 +125 +150 −25 0 +25 +50 +75 Temperature (_C) Temperature (_C) RSET/RIN RATIO vs TEMPERATURE GAIN vs TEMPERATURE 8.5 +100 +125 +150 +100 +125 +150 5.5 8.4 5.
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"#$ www.ti.com SBOS334A − SEPTEMBER 2005 − REVISED JANUARY 2006 TYPICAL CHARACTERISTICS: VS = 2.8V (continued) At TA = +25°C and RL = 150Ω, unless otherwise noted. VOUT LEVEL SHIFT vs TEMPERATURE QUIESCENT CURRENT vs TEMPERATURE 0.05 8 Quiescent Current (mA) 0.04 VOUT Level Shift (V) 9 VS = 2.8V VIN = 0V 0.03 0.02 0.01 0 6 5 4 −0.
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"#$ www.ti.com SBOS334A − SEPTEMBER 2005 − REVISED JANUARY 2006 TYPICAL CHARACTERISTICS: VS = 2.8V (continued) At TA = +25°C and RL = 150Ω, unless otherwise noted. TURN−ON TIME Voltage (500mV/div) Voltage (500mV/div) TURN−OFF TIME Time (1µs/div) Time (25ns/div) OUTPUT VOLTAGE vs OUTPUT CURRENT GROUP DELAY vs FREQUENCY 100 3.0 90 2.5 80 70 Group Delay (ns) VOUT (V) 2.0 1.5 1.0 +125_C 0.5 60 50 40 30 0_ C −25_ C −40_C +85_ C +25_ C 20 10 0 100k 0.15 0.14 0.13 0.12 0.11 0.10 0.
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"#$ www.ti.com SBOS334A − SEPTEMBER 2005 − REVISED JANUARY 2006 helps to automate start/stop operation of the TV-out function and minimizes power consumption. APPLICATIONS INFORMATION The OPA361 video amplifier has been optimized to fit seamlessly with Texas Instruments’ OMAP242x Multimedia processor. The following features have been integrated to provide excellent video performance. D A 2-pole filter is incorporated for DAC signal D Internal gain setting resistors (G = 5.
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"#$ www.ti.com SBOS334A − SEPTEMBER 2005 − REVISED JANUARY 2006 OPERATING VOLTAGE The Enable logic input voltage is referenced to the OPA361 GND pin. A logic level HIGH applied to the enable pin enables the op amp. The logic levels are compatible with 1.8V CMOS logic levels. A valid logic HIGH is defined as > 1.3V above GND. A valid logic LOW is defined as < 0.35V above GND. If the Enable pin is not connected, internal pull-up circuitry will enable the amplifier. The OPA361 is fully specified from 2.
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"#$ www.ti.com SBOS334A − SEPTEMBER 2005 − REVISED JANUARY 2006 Video Performance The color bar signal in Figure 3 shows excellent amplitude characteristics and no attenuation of colors with respect to the luminance signal. ∆: 2.02V @: 30.0mV The multiburst test patterns have different sine-wave burst sections with the following frequencies: 0.5MHz, 1MHz, 2MHz, 4MHz, 4.8MHz and 5.8MHz with 420mVPP.
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"#$ www.ti.com SBOS334A − SEPTEMBER 2005 − REVISED JANUARY 2006 INTERNAL LEVEL SHIFT Many common video DACs embedded in digital media processors, like the new OMAP242x processors, operate on a single supply (no negative supply). Typically, the lowest point of the sync pulse output by these video DACs is close to 0V. With a 0V input, the output of a common single-supply op amp saturates at a voltage > 0V. This effect would clip the sync pulse, and therefore degrade the video signal integrity.
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"#$ www.ti.com SBOS334A − SEPTEMBER 2005 − REVISED JANUARY 2006 TWL92230 1.8V DAC Regulator VAUX 0.5V VREF V+ 2.5V or 2.8V OMAP2420 1.8V OPA361 Pull−Up 10kΩ 10mV +In Video DAC 2−Pole Filter Out 75Ω + 500Ω 75Ω RSET G = 5.2V/V 4kΩ Enable TV Detect Shutdown Control (see note 1) GPIO(3) GND GPIO TV Detect 100kΩ(2) (1) Closed when enabled during normal operation; open when shut down. (2) Protects GPIO against overvoltage conditions during active video transmission.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 20-Aug-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant OPA361AIDCKR SC70 DCK 6 3000 178.0 9.0 2.4 2.5 1.2 4.0 8.0 Q3 OPA361AIDCKR SC70 DCK 6 3000 179.0 8.4 2.2 2.5 1.2 4.0 8.0 Q3 OPA361AIDCKT SC70 DCK 6 250 178.0 9.0 2.4 2.5 1.2 4.0 8.
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PACKAGE MATERIALS INFORMATION www.ti.com 20-Aug-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) OPA361AIDCKR SC70 DCK 6 3000 180.0 180.0 18.0 OPA361AIDCKR SC70 DCK 6 3000 195.0 200.0 45.0 OPA361AIDCKT SC70 DCK 6 250 180.0 180.0 18.0 OPA361AIDCKT SC70 DCK 6 250 195.0 200.0 45.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46C and to discontinue any product or service per JESD48B. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.