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a FEATURES AC PERFORMANCE Gain Bandwidth Product: 80 MHz (Gain = 2) Fast Settling: 100 ns to 0.01% for a 10 V Step Slew Rate: 375 V/␮s Stable at Gains of 2 or Greater Full Power Bandwidth: 6.0 MHz for 20 V p

Wideband, High Output Current, Fast Settling Op Amp AD842 CONNECTION DIAGRAMS Plastic DIP (N) Package and Cerdip (Q) Package

LCC (E) Package

DC PERFORMANCE Input Offset Voltage: 1 mV max Input Offset Drift: 14 ␮V/؇C Input Voltage Noise: 9 nV/√Hz typ Open-Loop Gain: 90 V/mV into a 500 ⍀ Load Output Current: 100 mA min Quiescent Supply Current: 14 mA max APPLICATIONS Line Drivers DAC and ADC Buffers Video and Pulse Amplifiers Available in Plastic DIP, Hermetic Metal Can, Hermetic Cerdip, SOIC and LCC Packages and in Chip Form MIL-STD-883B Parts Available Available in Tape and Reel in Accordance with EIA-481A Standard

TO-8 (H) Package SOIC (R-16) Package


The AD842 is a member of the Analog Devices family of wide bandwidth operational amplifiers. This family includes, among others, the AD840 which is stable at a gain of 10 or greater and the AD841 which is unity-gain stable. 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 80 MHz gain bandwidth, the AD842 offers extremely fast settling characteristics, typically settling to within 0.01% of final value in less than 100 ns for a 10 volt step. The AD842 also offers a low quiescent current of 13 mA, a high output current drive capability (100 mA minimum), a low input voltage noise of 9 nV√Hz and a low input offset voltage (1 mV maximum). The 375 V/µs slew rate of the AD842, along with its 80 MHz gain bandwidth, ensures excellent performance in video and pulse amplifier applications. This amplifier is ideally suited for use in high frequency signal conditioning circuits and wide bandwidth active filters. The extremely rapid settling time of the AD842 makes this amplifier the preferred choice for data acquisition applications which require 12-bit accuracy. The

AD842 is also appropriate for other applications such as high speed DAC and ADC buffer amplifiers and other wide bandwidth circuitry. APPLICATION HIGHLIGHTS

1. The high slew rate and fast settling time of the AD842 make it ideal for DAC and ADC buffers amplifiers, lines drivers and all types of video instrumentation circuitry. 2. The AD842 is a precision amplifier. It offers accuracy to 0.01% or better and wide bandwidth; performance previously available only in hybrids. 3. Laser-wafer trimming reduces the input offset voltage of 1 mV max, thus eliminating the need for external offset nulling in many applications. 4. Full differential inputs provide outstanding performance in all standard high frequency op amp applications where the circuit gain will be 2 or greater. 5. The AD842 is an enhanced replacement for the HA2542.

REV. D 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

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