Dual, Current Feedback a Low Power Op Amp AD812 FEATURES PIN CONFIGURATION 8-Lead Plastic Two Video Amplifiers in One 8-Lead SOIC Package Mini-DIP and SOIC Optimized for Driving Cables in Video Systems Excellent Video Specifications (R = 150 V): L Gain Flatness 0.1 dB to 40 MHz OUT1 1 8 V+ 0.02% Differential Gain Error IN1 2 + 7 OUT2 0.028 Differential Phase Error Low Power +IN1 3 6 IN2 Operates on Single +3 V Supply V 4 5 +IN2 AD812 5.5 mA/Amplifier Max Power Supply Current High Speed 145 MHz Unity Gain Bandwidth (3 dB) 1600 V/ms Slew Rate Easy to Use 50 mA Output Current Output Swing to 1 V of Rails (150 V Load) APPLICATIONS The AD812 offers low power of 4.0 mA per amplifier max (V = S Video Line Driver +5 V) and can run on a single +3 V power supply. The outputs Professional Cameras of each amplifier swing to within one volt of either supply rail to Video Switchers easily accommodate video signals of 1 V p-p. Also, at gains of Special Effects +2 the AD812 can swing 3 V p-p on a single +5 V power sup- ply. All this is offered in a small 8-lead plastic DIP or 8-lead PRODUCT DESCRIPTION SOIC package. These features make this dual amplifier ideal The AD812 is a low power, single supply, dual video amplifier. for portable and battery powered applications where size and Each of the amplifiers have 50 mA of output current and are power is critical. optimized for driving one back-terminated video load (150 W ) The outstanding bandwidth of 145 MHz along with 1600 V/m s each. Each amplifier is a current feedback amplifier and fea- of slew rate make the AD812 useful in many general purpose tures gain flatness of 0.1 dB to 40 MHz while offering differen- high speed applications where a single +5 V or dual power sup- tial gain and phase error of 0.02% and 0.02 . This makes the plies up to 15 V are available. The AD812 is available in the AD812 ideal for professional video electronics such as cameras industrial temperature range of 40 C to +85 C. and video switchers. 0.4 0.06 G = +2 0.3 R = 150V L 0.04 0.2 DIFFERENTIAL GAIN 0.1 0.08 0.02 0 0.1 0.06 DIFFERENTIAL PHASE 0.2 V = 615V S 0.04 0.3 65V 0.4 0.02 5V 0.5 3V 0 0.6 100k 1M 10M 100M 5 6 7 8 9 10 11 12 13 14 15 SUPPLY VOLTAGE 6Volts FREQUENCY Hz Figure 1. Fine-Scale Gain Flatness vs. Frequency, Gain Figure 2. Differential Gain and Phase vs. Supply Voltage, = +2, R = 150 W Gain = +2, R = 150 W L L REV. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. use, nor for any infringements of patents or other rights of third parties Tel: 781/329-4700 World Wide Web Site: AD812SPECIFICATIONS Dual Supply ( T = +258C, R = 150 V, unless otherwise noted) A L Model AD812A Conditions V Min Typ Max Units S DYNAMIC PERFORMANCE 3 dB Bandwidth G = +2, No Peaking 5 V 50 65 MHz 15 V 75 100 MHz Gain = +1 15 V 100 145 MHz Bandwidth for 0.1 dB Flatness G = +2 5 V 20 30 MHz 15 V 25 40 MHz 1 Slew Rate G = +2, R = 1 kW 5 V 275 425 V/m s L 20 V Step 15 V 1400 1600 V/m s G = 1, R = 1 kW 5 V 250 V/m s L 15 V 600 V/m s Settling Time to 0.1% G = 1, R = 1 kW L V = 3 V Step 5 V 50 ns O V = 10 V Step 15 V 40 ns O NOISE/HARMONIC PERFORMANCE Total Harmonic Distortion f = 1 MHz, R = 1 kW 15 V 90 dBc C L Input Voltage Noise f = 10 kHz 5 V, 15 V 3.5 nV/ Hz Input Current Noise f = 10 kHz, +In 5 V, 15 V 1.5 pA/ Hz f = 10 kHz, In 5 V, 15 V 18 pA/ Hz Differential Gain Error NTSC, G = +2, R = 150 W 5 V 0.05 0.1 % L 15 V 0.02 0.06 % Differential Phase Error 5 V 0.07 0.15 Degrees 15 V 0.02 0.06 Degrees DC PERFORMANCE Input Offset Voltage 5 V, 15 V 2 5 mV T T 12 mV MIN MAX Offset Drift 5 V, 15 V 15 m V/ C Input Bias Current 5 V, 15 V 7 25 m A T T 38 m A MIN MAX +Input Bias Current 5 V, 15 V 0.3 1.5 m A T T 2.0 m A MIN MAX Open-Loop Voltage Gain V = 2.5 V, R = 150 W 5 V 68 76 dB O L T T 69 dB MIN MAX V = 10 V, R = 1 kW 15 V 76 82 dB O L T T 75 dB MIN MAX Open-Loop Transresistance V = 2.5 V, R = 150 W 5 V 350 550 kW O L T T 270 kW MIN MAX V = 10 V, R = 1 kW 15 V 450 800 kW O L T T 370 kW MIN MAX INPUT CHARACTERISTICS Input Resistance +Input 15 V 15 MW Input 65 W Input Capacitance +Input 1.7 pF Input Common Mode 5 V 4.0 V Voltage Range 15 V 13.5 V Common-Mode Rejection Ratio Input Offset Voltage V = 2.5 V 5 V 51 58 dB CM Input Current 23.0 m A/V +Input Current 0.07 0.15 m A/V Input Offset Voltage V = 12 V 15 V 55 60 dB CM Input Current 1.5 3.3 m A/V +Input Current 0.05 0.15 m A/V 2 REV. B