BETALM1458Dual general-purpose operational amplifier
Two analog amplifiers, with independent feedback and shared rails.
LM1458 contains two internally compensated, general-purpose operational amplifiers in one eight-pin package. Each amplifier has its own input pair and output, while both share the positive and negative supply rails. External feedback determines the useful closed-loop gain. This page uses the commercial LM1458N/NOPB PDIP-8 and LM1458M/NOPB SOIC-8 parts, specified over 0 to 70°C. The pinout and downloadable PCB footprint follow the selected package; LM1558 military-temperature limits are not used. The example applies 0.50 V to both channels on ±15 V rails. A 20 kΩ / 10 kΩ feedback network gives channel A an ideal output of 1.50 V, while channel B follows at 0.50 V. Real errors depend on offset, input bias current, resistor tolerance, load and signal frequency.
