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PRODUCT DESCRIPTION

The AD846 is a monolithic, very high speed operational amplifier offering high performance. Although technically classed as a current-feedback or transimpedance amplifier, it may be used in much the same way as traditional op amps while providing significant performance benefits. Employing Analog Devices’ junction isolated complementary bipolar (CB) process, the AD846 achieves true “12-bit” (0.01%) precision on critical ac and dc parameters, a level of performance unmatched by amplifiers fabricated using either the dielectrically isolated (DI) or other bipolar processes.

The AD846 offers significant advantages over conventional high speed operational amplifiers. It maintains a nearly constant bandwidth and settling time to 0.01% over a wide range of closed-loop gains. This makes the AD846 ideal for amplifying the residue in multiple-pass analog-to-digital converters.

FEATURES

AC PERFORMANCE

Small Signal Bandwidth: 80 MHz (AV = –1)

Slew Rate: 450 V/μs

Full Power Bandwidth: 6.8 MHz at 20 V p-p, RL = 500 Ω

Fast Settling: for 10 V Step: 110 ns to 0.01%, 80 ns to 0.1%

Differential Gain: <0.01% @ 4.4 MHz

Differential Phase: <0.028° @ 4.4 MHz

Total Harmonic Distortion (THD): 0.0005% @ 100 kHz

Open-Loop Transimpedance: 200 MΩ

Input Voltage Noise: 2 nV/√Hz

DC PERFORMANCE

Input Offset Voltage: 75 μV max (B Grade)

Input Offset Drift: 3.5 μV/°C max (B Grade)

Quiescent Supply Current: 6.5 mA max

APPLICATIONS

High Speed DAC Buffers

Multiflash ADC Error Amplifiers

Flash ADC Buffers

Coaxial Cable Drivers

High Performance Audio Circuitry

Available in Plastic Mini-DIP, Hermetic Cerdip, and Plastic SOIC (A) Package

MIL-STD-883B Part Available