LM108A LM208A LM308A Operational Amplifiers
May 1989
LM108A LM208A LM308A Operational Amplifiers
General Description
T...
LM108A LM208A LM308A Operational
Amplifiers
May 1989
LM108A LM208A LM308A Operational
Amplifiers
General Description
The LM108 LM108A series are precision operational
amplifiers having specifications about a factor of ten better than FET
amplifiers over their operating temperature range In addition to low input currents these devices have extremely low offset
voltage making it possible to eliminate offset adjustments in most cases and obtain performance approaching chopper stabilized
amplifiers The devices operate with supply
voltages from g 2V to g 18V 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 LM108A 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 LM208A is identical to the LM108A except that the LM208A has its performance guaranteed over a b25 C to a 85 C temperature range instead of b 55 C to a 125 C The LM308A devices have slightly-relaxed specifications and performances over a 0 C to a ...