Wideband Voltage Feedback Amplifier
Description
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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 distor...
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