PRODUCT DESCRIPTION
The AD704 is a quad, low power bipolar op amp that has the low input bias current of a BiFET amplifier but which offers a significantly lower IB drift over temperature. It utilizes Super beta bipolar input transistors to achieve picoampere input bias current levels (similar to FET input amplifiers at room temperature), while its IB typically only increases by 5× at +125°C (unlike a BiFET amp, for which IB doubles every 10°C resulting in a 1000× increase at +125°C). Furthermore the AD704 achieves 75 µV offset voltage and low noise characteristics of a precision bipolar input op amp.

FEATURES
High DC Precision
  75 mV max Offset Voltage
  1 mV/8C max Offset Voltage Drift
  150 pA max Input Bias Current
  0.2 pA/8C typical IB Drift
Low Noise
  0.5 mV p-p typical Noise, 0.1 Hz to 10 Hz
Low Power
  600 µA max Supply Current per Amplifier
Chips & MIL-STD-883B Processing Available
Available in Tape and Reel in Accordance with EIA-481A Standard
Single Version: AD705, Dual Version: AD706

PRIMARY APPLICATIONS
Industrial/Process Controls
Weigh Scales
ECG/EKG Instrumentation
Low Frequency Active Filters