General Description

The LM108 series are precision operational amplifiers having

specifications a factor of ten better than FET amplifiers

over a b55§C to a125§C temperature range.

The devices operate with supply voltages from g2V to

g20V and have sufficient supply rejection to use unregulated

supplies. Although the circuit is interchangeable with and

uses the same compensation as the LM101A, an alternate

compensation scheme can be used to make it particularly

insensitive to power supply noise and to make supply bypass

capacitors unnecessary.

The low current error of the LM108 series makes possible

many designs that are not practical with conventional amplifiers.

In fact, it operates from 10 MX source resistances,

introducing less error than devices like the 709 with 10 kX

sources. Integrators with drifts less than 500 mV/sec and

analog time delays in excess of one hour can be made using

capacitors no larger than 1 mF.

The LM108 is guaranteed from b55§C to a125§C, the

LM208 from b25§C to a85§C, and the LM308 from 0§C to

a70§C.