LM108 Datasheet | National Semiconductor

Description The LM108 series are precision operational amplifiers having specifications a factor of ten better than FET amplifiers over a b55 C to a 125 C temperature range The devices operate with supply voltages from g 2V to g 20V and have sufficient supply rejection to use unregulated supplies Although the circuit is interchangeable with and uses the same pensation as the LM101A an alternate pensation 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 k X sources Integrators with drifts less than 500 m V sec and analog time delays in excess of one hour can be made using capacitors no larger than 1 m F The LM108 is guaranteed from b55 C to a 125 C the LM208 from b25 C to a 85 C and the LM308 from 0 C to a 70 C Features Maximum input bias current of 3 0 n A over temperature Offset current less than 400 p A over temperature Supply current of only 300 m A even in saturation Guaranteed drift characteristics pensation Circuits Standard pensation Circuit Alternate Frequency pensation Cf t R1 CO R1 a R2 CO e 30 p F TL H 7758 - 1 TL H 7758 - 2 Bandwidth and slew rate are proportional to 1 Cf Improves rejection of power supply noise by a factor of ten Bandwidth and slew rate are proportional to 1 Cs Feedforward pensation TL H 7758 - 3 C1995 National Semiconductor Corporation TL H 7758 RRD-B30M115 Printed in U S A Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications (Note 5) LM108 LM208 g 20V Supply Voltage Power Dissipation (Note 1) 500 m W g 10 m A Differential Input Current (Note 2) g 15V Input Voltage (Note 3) Output...