AD706 is a dual, low power, bipolar op amp that has the low input bias current of a JFET amplifier, but which offers a significantly lower IB drift over temperature. It utilizes superbeta bipolar input transistors to achieve picoampere input bias currents while providing very low offset voltage and voltage noise.
The AD706 is a dual, low‑power bipolar operational amplifier that combines the ultra‑low input bias current of a JFET input stage with the low drift of a bipolar design. It offers 100 pV max offset voltage, 200 pA max input bias current, and 0.5 µV p‑p voltage noise from 0.1 Hz to 10 Hz. The device is available in 8‑lead plastic Mini‑DIP and SOIC surface‑mount packages, and can be ordered on tape and reel.
Typical applications include low‑frequency active filters, precision instrumentation, and high‑quality integrators for 12‑bit and 14‑bit data‑acquisition systems. The AD706 operates from a +2 V to +18 V supply, draws less than 1 mA quiescent current, and provides a unity‑gain bandwidth of 0.8 MHz, making it suitable for high‑density board designs.
| Input Offset Voltage (Initial) | 30 µV min, 100 µV typ |
|---|---|
| Input Bias Current (V‑ = 0 V) | 50 pA min, 200 pA typ |
| Operating Supply Voltage Range | +2.0 V to +18 V |
| Quiescent Current, Total | 0.75 mA min, 1.2 mA typ |
| Unity‑Gain Crossover Frequency | 0.8 MHz |
| Input Voltage Noise (0.1 Hz‑10 Hz) | 0.5 µV p‑p |
The input bias current is 50 pA minimum and 200 pA typical when the supply voltage is 0 V.
The AD706 operates from +2.0 V up to +18 V.
The unity‑gain crossover frequency is 0.8 MHz.
The device draws 0.75 mA minimum and about 1.2 mA typical total quiescent current.