PRODUCT DESCRIPTION
The AD840 is a member of the Analog Devices’ family of wide bandwidth operational amplifiers. This high speed/high precision family includes, among others, the AD841, which is unity gain stable, and the AD842, which is stable at a gain of two or greater and has 100 mA minimum output current drive. These devices are fabricated using Analog Devices’ junction isolated complementary bipolar (CB) process. This process permits a combination of dc precision and wideband ac performance previously unobtainable in a monolithic op amp. In addition to its 400 MHz gain bandwidth product, the AD840 offers extremely fast settling characteristics, typically settling to within 0.01% of final value in 100 ns for a 10 volt step.

FEATURES
Wideband AC Performance
   Gain Bandwidth Product: 400 MHz (Gain ≥ 10)
   Fast Settling: 100 ns to 0.01% for a 10 V Step
   Slew Rate: 400 V/ms
   Stable at Gains of 10 or Greater
   Full Power Bandwidth: 6.4 MHz for 20 V p-p into a 500 V Load
Precision DC Performance
   Input Offset Voltage: 0.3 mV max
   Input Offset Drift: 3 mV/8C typ
   Input Voltage Noise: 4 nV/√Hz
   Open-Loop Gain: 130 V/mV into a 1 kV Load
   Output Current: 50 mA min
   Supply Current: 12 mA max

APPLICATIONS
Video and Pulse Amplifiers
DAC and ADC Buffers
Line Drivers
Available in 14-Pin Plastic DIP, Hermetic Cerdip and 20-Pin LCC Packages and in Chip Form
MIL-STD-883B Processing Available