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LT1002 - Dual, Matched Precision Operational Amplifier

The LT®1002 dual, matched precision operational amplifiers combine excellent individual amplifier performance with tight matching and temperature tracking between amplifiers.

In the design, processing, and testing of the device, particular attention has been paid to the optimization of the entire distribution of several key parameters and their matching. Consequently, the specifications of even the low cost commercial grade (LT1002C) have been spectacularly improved compared to presently available devices. Essentially, the input offset voltage of all units is less than 80µV, and matching between amplifiers is consistently beter than 60µV (see distribution plot below). Input bias and offset currents, channel separation, common mode and power suply rejections of the LT1002C are all specified at levels which were previsouly attainable only on very expensive, selected grades of other dual devices. Power dissipation is nearly halved compared to the most popular precision duals, without adversely affecting noise or speed performance. A by-product of lower dissipation is decreased warm-up drift. For even better performance in a single precision op amp, refer to the LT1001 data sheet. A bridge signal conditioning application is shown below. This circuit illustrates the requirement for both excellent matching and individual amplifier specifications.

Features Guaranteed low offset voltage LT1002A 60µV max LT1002 100µV max Guaranteed offset voltage match LT1002A 40µV max LT1002 80µV max Guaranteed low drift LT1002A 0.9µV/°C max LT1002 1.3µV/°C max Guaranteed CMRR LT1002A 110dB min LT1002 110dB min Guaranteed channel separation LT1002A 132dB min LT1002 130dB min Guaranteed matching characteristics Low noise 0.35µVP-P Typical Application

Applications Thermocouple Amplifiers Strain Gauge Amplifiers Low level signal processing Medical instrumentation Precision dual limit threshold detection Instrumentation amplifiers Packaging