GENERAL DESCRIPTION

The AD743 is an ultralow noise, precision, FET input, monolithic operational amplifier. It offers a combination of the ultralow voltage noise generally associated with bipolar input op amps and the very low input current of a FET input device. Furthermore, the AD743 does not exhibit an output phase reversal when the negative common-mode voltage limit is exceeded.

FEATURES

Ultralow Noise Performance

2.9 nV/√Hz at 10 kHz

0.38
V p-p, 0.1 Hz to 10 Hz

6.9 fA/√Hz Current Noise at 1 kHz

Excellent DC Performance

0.5 mV Max Offset Voltage

250 pA Max Input Bias Current

1000 V/mV Min Open-Loop Gain

AC Performance

2.8 V/
s Slew Rate

4.5 MHz Unity-Gain Bandwidth

THD = 0.0003 @ 1 kHz

Available in Tape and Reel in Accordance with EIA-481A Standard

APPLICATIONS

Sonar Preamplifiers

High Dynamic Range Filters (>140 dB)

Photodiode and IR Detector Amplifiers

Accelerometers