特点
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 0.35μV
P-P
典型应用
典型应用
描述
Most H (Metal Can), J (Ceramic), and K (Metal Can) Packages from Linear Technology Are Now Obsolete
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.
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