AD9621

a FEATURES 350 MHz Small Signal Bandwidth 130 MHz Large Signal BW (4 V p-p) High Slew Rate: 1200 V/ s Fast Settling: 11 ns to 0.01%/7 ns to 0.1% 3 V Supply Operation APPLICATIONS ADC Input Driver Differential Amplifiers IF/RF Amplifiers Pulse Amplifiers Professional Video DAC Current-to-Voltage Baseband and Video Communications Pin Diode Receivers Active Filters/lntegrators/Log Amps GENERAL DESCRIPTION NC # –INPUT +INPUT –VS 1 2 3 4 Wideband Voltage Feedback Amplifier AD9621* CONNECTION DIAGRAM 8 7 6 5 NC # +V S OUTPUT NC AD9621 # OPTIONAL CAPACITOR CB CONNECTED HERE DECREASES SETTLING TIME The AD9621 is one of a family of very high speed and wide bandwidth amplifiers utilizing a voltage feedback architecture. These amplifiers define a new level of performance for voltage feedback amplifiers, especially in the categories of large signal bandwidth, slew rate, settling, and low noise. Proprietary design architectures have resulted in an amplifier family that combines the most attractive attributes of both current feedback and voltage feedback amplifiers. The AD9621 exhibits extraordinarily accurate and fast pulse response characteristics (7 ns settling to 0.1%) as well as extremely wide small and large signal bandwidth previously found only in current feedback amplifiers. When combined with balanced high impedance inputs and low input noise current more common to voltage feedback architectures, the AD9621 offers performance not previously available in a monolithic operational amplifier. *Protected by U.S. Patent 5,150,074 and others pending. Other members of the AD962X amplifier family are the AD9622 (G = +2), AD9623 (G = +4), and the AD9624 (G = +6). A separate data sheet is available from Analog Devices for each model. Each generic device has been designed for a different minimum stable gain setting, allowing users flexibility in optimizing system performance. Dynamic performance specifications such as slew rate, settling time, and distortion vary from model to model. The table below summarizes key performance attributes for the AD962X family and can be used as a selection guide. The AD9621 is offered in industrial and military temperature ranges. Industrial versions are available in plastic DIP, SOIC, and cerdip; MIL versions are packaged in cerdips. PRODUCT HIGHLIGHTS 1. Wide Large Signal Bandwidth 2. High Slew Rate 3. Fast Settling 4. Output Short-Circuit Protected AD9622 AD9623 AD9624 Units Parameter AD9621 Minimum Stable Gain Harmonic Distortion (20 MHz) Large Signal Bandwidth (4 V p-p) SSBW (0.5 V p-p) Slew Rate Rise/Fall Time (0.5 V Step) Settling Time (to 0.1%/0.01%) Input Noise (0.1 MHz – 200 MHz) +1 –52 130 350 1200 2.4 7/11 80 +2 –66 160 220 1500 1.7 8/14 49 +4 –64 190 270 2100 1.6 8/14 36 +6 –66 200 300 2200 1.5 8/14 32 V/V dB MHz MHz V/µs ns ns µV rms R EV. 0 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: 617/329-4700 Fax: 617/326-8703 AD9621–SPECIFICATIONS DC ELECTRICAL CHARACTERISTICS ( Parameter Conditions 1 VS = 5 V, RLOAD = 100 Ω; AV = 1, unless otherwise noted) Test Level AD9621AN/AQ/AR Min Typ Max Min AD9621SQ Typ Max Units Temp DC SPECIFICATIONS Input Offset Voltage Input Bias Current Input Bias Current TC Input Offset Current Offset Current TC Input Resistance Input Capacitance Common-Mode Range Common-Mode Rejection Ratio Open Loop Gain Output Voltage Range Output Current Output Resistance FREQUENCY DOMAIN Bandwidth (–3 dB) Small Signal Large Signal Amplitude of Peaking Amplitude of Roll-off Phase Nonlinearity 2nd Harmonic Distortion 3rd Harmonic Distortion Common-Mode Rejection Mode Spectral Input Noise Voltage Spectral Input Noise Current Average Equivalent Integrated Input Noise Voltage TIME DOMAIN Slew Rate Rise/Fall Time Overshoot Settling Time To 0.1% To 0.01% To 0.1%2 T0 0.012 Overdrive Recovery Differential Gain (4.3 MHz) Differential Phase (4.3 MHz) ∆VCM = 1 V VOUT = ± 2 V p-p +25°C Full +25°C Full Full +25°C Full Full +25°C +25°C Full +25°C +25°C Full Full +25°C I VI I VI V I VI V V V VI I V VI VI V –12 –15 –20 –2.0 –3.0 ±2 7 +12 +15 16 +20 –12 –15 –20 –2.0 –3.0 ± 3.0 46 ± 3.0 60 35 ± 0.3 +2.0 +3.0 2.5 500 1.2 ± 3.4 49 56 ± 3.4 70 0.3 ± 3.0 46 ± 3.0 60 mV mV 7 µA µA 35 nA/°C +2.0 µA +3.0 µA 2.5 nA/°C 500 kΩ 1.2 pF ± 3.4 V 49 dB 56 dB ± 3.4 V 70 mA 0.3 Ω ±2 +12 +15 16 +20 VOUT ≤ 0.4 V p-p VOUT ≤ 4.0 V p-p Full Spectrum ≤ 100 MHz DC to 100 MHz 2 V p-p; 20 MHz 2 V p-p; 20 MHz @ 20 MHz 1 to 200 MHz 1 to 200 MHz 0.1 to 200 MHz VOUT = 5 V Step VOUT = 0.5 V Step VOUT = 5 V Step VOUT = 2 V Step VOUT = 2 V Step VOUT = 2 V Step VOUT = 4 V Step VOUT = 4 V Step 1.5x to ± 2 mV RL = 150 Ω RL = 150 Ω Full Full Full Full +25°C Full Full +25°C +25°C +25°C +25°C Full +25°C Full Full +25°C Full +25°C +25°C +25°C +25°C +25°C Full Full Full +25°C II V II II V II II V V V V IV V IV IV V IV V V V V V IV VI VI I 230 350 130 0.1 0 1.1 –55 –52 +28 5.6 3.6 80 230 1.2 0.6 –44 –43 350 130 0.1 0 1.1 –55 –52 +28 5.6 3.6 80 1.2 0.6 –44 –43 MHz MHz dB dB Degree dBc dBc dB nV/√Hz pA/√Hz µV rms V/µs ns ns % ns ns ns ns ns % Degree V mA mA dB 850 1200 2.4 4.8 7 0 15 7 11 15 9 13 50 0.01