The AD843 is a 34MHz, CBFET input high precision op amp, with 0.6nA input bias current and 135ns settling time, suitable for high speed sample-and-hold applications and high speed integrators.
The AD843 is a high‑speed operational amplifier featuring a 34 MHz unity‑gain bandwidth, 135 ns settling time to 0.01 % of final value, and a 250 V/µs slew rate. It combines the low input bias current of a FET input (0.6 nA typ) with the performance of a bipolar process, delivering 50 mA output current and 13 mA supply current.
Designed for high‑speed sample‑and‑hold circuits, active filters, and high‑frequency signal conditioning, the device is offered in 8‑pin plastic DIP, Cerdip, 16‑pin SOIC, 20‑pin LCC, and 12‑pin hermetic metal can packages, with tape‑and‑reel options. It operates without external compensation at closed‑loop gains of 1 or greater and includes offset‑null pins for fine tuning.
| Unity Gain Bandwidth | 34 MHz |
|---|---|
| Fast Settling Time | 135 ns to 0.01 % (10 V step) |
| Slew Rate | 250 V/µs |
| Input Offset Voltage | 1 mV max (AD843K/B) |
| Input Bias Current | 0.6 nA typ |
| Output Current | 50 mA min |
| Supply Current | 13 mA max |
| Operating Temperature (Commercial) | 0 °C to +70 °C |
| Operating Temperature (Industrial) | -40 °C to +85 °C |
| Operating Temperature (Military) | -55 °C to +125 °C |
The AD843 has a unity‑gain bandwidth of 34 MHz.
No, the AD843 does not require external compensation at closed‑loop gains of 1 or greater.
The AD843 is offered in 8‑pin plastic DIP, Cerdip, 16‑pin SOIC, 20‑pin LCC, and 12‑pin hermetic metal can packages, with tape‑and‑reel options.
The AD843 settles to within 0.01 % of the final value in 135 ns for a 10 V step.