AD705J Bipolar Operational Amplifier IC

The AD705 designed as a low power bipolar op-amp providing a low input bias current of a BiFET amplifier but which offers a significantly lower IB drift over temperature. The AD705 offers wide range of advantages of BiFET and bipolar op amps without their inherent disadvantages. It utilizes super beta bipolar input transistors to achieve the picoampere input bias current levels of FET input amplifiers. Whereas its IB typically only increases 5 times vs. BiFET amplifiers which exhibit a lOOOXincrease over temperature. This indicates that, at room temperature, while a typical BiFET may have less IB than the AD70S, the BiFET’s input current will increase to a level of several nA at + 12SoC. Super beta bipolar technology also permits the AD705 to achieve the microvolt offset voltage. And also low noise characteristics of a precision bipolar input amplifier.

The AD705 comes as a high-quality replacement for the industry-standard OP-O7 amplifier. While drawing only one sixth of its power supply current. Since it has only 1/20th the input bias current of an OP-O7, the AD705 also used with much higher source impedances. While providing the same level of dc precision. In addition, since the input bias currents are at picoAmp levels, the commonly used “balancing” resistor (connected between the noninverting input of a bipolar op amp and ground) not required.

The AD705 designed as an excellent choice for use in low-frequency active fIlters in 12- and 14-bit data acquisition systems. Also in precision instrumentation and as a high-quality integrator. The AD70S internally compensated for unity gain and available in five performance grades.