Picoampere Input Current Bipolar Op Amp - Analog Devices

The AD705 is a low power bipolar op amp that has the low in- put bias current of a BiFET Amplifier but which offers a signifi- cantly lower IB drift over temperature. The AD705 offers many of the advantages of BiFET and bipolar op amps without their inherent disadvantages. It utilizes superbeta bipolar input tran- sistors to achieve the picoampere input bias current levels of FET input Amplifiers (at room temperature), while its IB typi- cally only increases 5 times vs. BiFET Amplifiers which exhibit a 1000X increase over temperature. This means that, at room temperature, while a typical BiFET may have less IB than the AD705 the BiFETs input current will increase to a level of several nA at +125C. Superbeta bipolar technology also per- mits the AD705 to achieve the microvolt offset voltage and low noise characteristics of a precision bipolar input Amplifier The AD705 is a high quality replacement for the industry- standard OP07 Amplifier while drawing only one sixth of its power supply current. Since it has only 1/20th the input bias current of an OP07 the AD705 CAN be used with much higher source impedances, while providing the same level of dc preci- sion. In addition, since the input bias currents are at picoAmp levels, the commonly used balancing resistor (connected be- tween the noninverting input of a bipolar op amp and ground) is not required. The AD705 is an excellent choice for use in low frequency ac- tive Filters in 12- and 14-bit data acquisition systems, in preci- sion instrumentation and as a high quality integrator. The AD705 is internally compensated for unity gain and is available in five performance grades. The AD705J and AD705K are rated over the commercial temperature range of 0C to +70C. The AD705A and AD705B are rated over the industrial temperature range of 40C to +85C. The AD705T is rated over the military temperature range of 55C to +125C and is available processed to MIL-STD-883B, Rev. C. The AD705 is offered in three varieties of 8-pin package: plastic DIP, hermetic cerdip and surface mount (SOIC). J grade chips are also available. By Analog Devices, Inc.
AD705 's PackagesAD705 's pdf datasheet

AD705 Pinout, Pinouts
AD705 pinout,Pin out
This is one package pinout of AD705,If you need more pinouts please download AD705's pdf datasheet.

AD705 Application circuits
AD705 circuits
This is one application circuit of AD705,If you need more circuits,please download AD705's pdf datasheet.

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