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AD812 Dataheets PDF



Part Number AD812
Manufacturers Analog Devices
Logo Analog Devices
Description Dual/ Current Feedback Low Power Op Amp
Datasheet AD812 DatasheetAD812 Datasheet (PDF)

a FEATURES Two Video Amplifiers in One 8-Lead SOIC Package Optimized for Driving Cables in Video Systems Excellent Video Specifications (RL = 150 ⍀ ): Gain Flatness 0.1 dB to 40 MHz 0.02% Differential Gain Error 0.02 ؇ Differential Phase Error Low Power Operates on Single +3 V Supply 5.5 mA/Amplifier Max Power Supply Current High Speed 145 MHz Unity Gain Bandwidth (3 dB) 1600 V/␮ s Slew Rate Easy to Use 50 mA Output Current Output Swing to 1 V of Rails (150 ⍀ Load) APPLICATIONS Video Line Driver.

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a FEATURES Two Video Amplifiers in One 8-Lead SOIC Package Optimized for Driving Cables in Video Systems Excellent Video Specifications (RL = 150 ⍀ ): Gain Flatness 0.1 dB to 40 MHz 0.02% Differential Gain Error 0.02 ؇ Differential Phase Error Low Power Operates on Single +3 V Supply 5.5 mA/Amplifier Max Power Supply Current High Speed 145 MHz Unity Gain Bandwidth (3 dB) 1600 V/␮ s Slew Rate Easy to Use 50 mA Output Current Output Swing to 1 V of Rails (150 ⍀ Load) APPLICATIONS Video Line Driver Professional Cameras Video Switchers Special Effects PRODUCT DESCRIPTION Dual, Current Feedback Low Power Op Amp AD812 PIN CONFIGURATION 8-Lead Plastic Mini-DIP and SOIC OUT1 1 –IN1 2 +IN1 3 + + 8 V+ 7 OUT2 6 –IN2 V– 4 AD812 5 +IN2 The AD812 is a low power, single supply, dual video amplifier. Each of the amplifiers have 50 mA of output current and are optimized for driving one back-terminated video load (150 Ω) each. Each amplifier is a current feedback amplifier and features gain flatness of 0.1 dB to 40 MHz while offering differential gain and phase error of 0.02% and 0.02°. This makes the AD812 ideal for professional video electronics such as cameras and video switchers. 0.4 0.3 0.2 G = +2 RL = 150⍀ The AD812 offers low power of 4.0 mA per amplifier max (VS = +5 V) and can run on a single +3 V power supply. The outputs of each amplifier swing to within one volt of either supply rail to easily accommodate video signals of 1 V p-p. Also, at gains of +2 the AD812 can swing 3 V p-p on a single +5 V power supply. All this is offered in a small 8-lead plastic DIP or 8-lead SOIC package. These features make this dual amplifier ideal for portable and battery powered applications where size and power is critical. The outstanding bandwidth of 145 MHz along with 1600 V/µs of slew rate make the AD812 useful in many general purpose high speed applications where a single +5 V or dual power supplies up to ± 15 V are available. The AD812 is available in the industrial temperature range of –40°C to +85°C. 0.06 DIFFERENTIAL GAIN – % 0.04 DIFFERENTIAL GAIN NORMALIZED GAIN – dB 0.1 0 –0.1 –0.2 VS = ؎15V –0.3 ؎5V –0.4 5V –0.5 3V –0.6 100k 1M 10M FREQUENCY – Hz 100M DIFFERENTIAL PHASE – Degrees 0.08 0.02 0.06 DIFFERENTIAL PHASE 0.04 0.02 0 5 6 7 8 9 10 11 12 SUPPLY VOLTAGE – ؎Volts 13 14 15 Figure 1. Fine-Scale Gain Flatness vs. Frequency, Gain = +2, RL = 150 Ω Figure 2. Differential Gain and Phase vs. Supply Voltage, Gain = +2, RL = 150 Ω REV. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 1998 AD812–SPECIFICATIONS Dual Supply (@ T = +25؇C, R = 150 ⍀, unless otherwise noted) A L Model Conditions DYNAMIC PERFORMANCE –3 dB Bandwidth G = +2, No Peaking Gain = +1 G = +2 G = +2, RL = 1 kΩ 20 V Step G = –1, RL = 1 kΩ G = –1, RL = 1 kΩ VO = 3 V Step VO = 10 V Step fC = 1 MHz, RL = 1 kΩ f = 10 kHz f = 10 kHz, +In f = 10 kHz, –In NTSC, G = +2, RL = 150 Ω VS ±5 V ± 15 V ± 15 V ±5 V ± 15 V ±5 V ± 15 V ±5 V ± 15 V ±5 V ± 15 V ± 15 V ± 5 V, ± 15 V ± 5 V, ± 15 V ± 5 V, ± 15 V ±5 V ± 15 V ±5 V ± 15 V ± 5 V, ± 15 V TMIN –TMAX Offset Drift –Input Bias Current TMIN –T MAX +Input Bias Current Open-Loop Voltage Gain TMIN –T MAX VO = ± 2.5 V, RL = 150 Ω TMIN –T MAX VO = ± 10 V, RL = 1 kΩ TMIN –T MAX VO = ± 2.5 V, RL = 150 Ω TMIN –T MAX VO = ± 10 V, RL = 1 kΩ TMIN –T MAX +Input –Input +Input ± 5 V, ± 15 V ± 5 V, ± 15 V ± 5 V, ± 15 V ±5 V ± 15 V ±5 V ± 15 V 68 69 76 75 350 270 450 370 Min 50 75 100 20 25 275 1400 AD812A Typ 65 100 145 30 40 425 1600 250 600 50 40 –90 3.5 1.5 18 0.05 0.02 0.07 0.02 2 15 7 0.3 76 82 550 800 Max Units MHz MHz MHz MHz MHz V/µs V/µs V/µs V/µs ns ns dBc nV/√Hz pA/√Hz pA/√Hz % % Degrees Degrees mV mV µV/°C µA µA µA µA dB dB dB dB kΩ kΩ kΩ kΩ MΩ Ω pF ±V ±V dB µA/V µA/V dB µA/V µA/V Bandwidth for 0.1 dB Flatness Slew Rate1 Settling Time to 0.1% NOISE/HARMONIC PERFORMANCE Total Harmonic Distortion Input Voltage Noise Input Current Noise Differential Gain Error Differential Phase Error DC PERFORMANCE Input Offset Voltage 0.1 0.06 0.15 0.06 5 12 25 38 1.5 2.0 Open-Loop Transresistance INPUT CHARACTERISTICS Input Resistance Input Capacitance Input Common Mode Voltage Range Common-Mode Rejection Ratio Input Offset Voltage –Input Current +Input Current Input Offset Voltage –Input Current +Input Current ± 15 V ±5 V ± 15 V 15 65 1.7 4.0 13.5 51 58 2 0.07 60 1.5 0.05 VCM = ± 2.5 V VCM = ± 12 V ±5 V ± 15 V 3.0 0.15 3.3 0.15 55 –2– REV. B AD812 Model Conditions OUTPUT CHARACTERISTICS Output Voltage Swing Output Current Short Circuit .


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