GENERAL DESCRIPTION The OP400 is the first monolithic quad operational amplifier that features OP77-type performance. Precision performance is not sacrificed with the OP400 to obtain the space and cost savings offered by quad amplifiers. FEATURES Low input offset voltage: 150 μV maximum Low offset voltage drift over –55°C to +125°C: 1.2 pV/°C maximum Low supply current (per amplifier): 725 μA maximum High open-loop gain: 5000 V/mV minimum Input bias current: 3 nA maximum Low noise voltage density: 11 nV/√Hz at 1 kHz Stable with large capacitive loads: 10 nF typical Pin-compatible to LM148, HA4741, RM4156, and LT1014, with improved performance Available in die form