The AD844 is a high-speed monolithic operational amplifier fabricated using Analog Devices' junction isolated complementary bipolar (CB) process. It combines high bandwidth and very fast large signal response with excellent dc performance. Although optimized for use in current-to-voltage applications and as an inverting mode amplifier, it is also suitable for use in many noninverting applications. The AD844 can be used in place of traditional op amps, but its current feedback architecture results in much better ac performance, high linearity, and an exceptionally clean pulse response. This type of op amp provides a closed-loop bandwidth that is determined primarily by the feedback resistor and is almost independent of the closed-loop gain. The AD844 is free from the slew rate limitations.
The AD844 is a high‑speed monolithic operational amplifier that uses a current‑feedback architecture to achieve very wide bandwidth and fast slew rates. It is available in several grades (J, A, B, S) and package types (8‑lead PDIP, 8‑lead CERDIP, 16‑lead SOIC) covering commercial to military temperature ranges.
Key performance figures include a 60 MHz bandwidth at a gain of –1, 33 MHz at a gain of –10, an output slew rate up to 2000 V/µs, and the ability to drive 50 Ω loads with low distortion. The device operates from a 4.5 V to 18 V supply and draws a quiescent current of 6.5 mA.
| Bandwidth (Gain = -1) | 60 MHz |
|---|---|
| Bandwidth (Gain = -10) | 33 MHz |
| Output Slew Rate | up to 2000 V/µs |
| Quiescent Current | 6.5 mA |
| Supply Voltage Range | 4.5 V to 18 V |
The AD844 can achieve an output slew rate of up to 2000 V/µs.
It operates from 4.5 V up to 18 V.
The device provides a 60 MHz bandwidth when configured for a gain of –1.
The typical quiescent current is 6.5 mA.