LT1490AIS8#PBF Operational amplifier, 2-fold, 180 kHz, 0.06 V/µs, SO-8

Dual/Quad Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps

Description: The LT®1490A/LT1491A are dual and quad op amps with a low input offset voltage of 500µV max. The LT1490A/LT1491A operate on all single and split supplies with a total voltage of 2V to 44V, drawing only 40µA of quiescent current per amplifier. These amplifiers are reverse supply protected; they draw virtually no current for reverse supply up to 18V. The input range of the LT1490A/LT1491A includes both supplies and the output swings to both supplies. Unlike most micropower op amps, the LT1490A/LT1491A can drive heavy loads; their rail-to-rail outputs drive 20mA. The LT1490A/LT1491A are unity-gain stable and drive all capacitive loads up to 10,000pF when optional 0.22µF and 150O compensation is used. The LT1490A/LT1491A have a unique input stage that operates and remains high impedance when above the positive supply. The inputs take 44V both differential and common mode even when operating on a 3V supply. Built-in resistors protect the inputs for faults below the negative supply up to 15V. There is no phase reversal of the output for inputs 15V below V- or 44V above V-, independent of V+. The LT1490A dual op amp is available in the 8-pin MSOP, PDIP and SO packages. For space limited applications LT1490A is available in a 3mm × 3mm × 0.8mm, dual fine pitch leadless package (DFN). The quad LT1491A is available in the 14-pin SO, PDIP and 5mm × 3mm × 0.8mm DFN packages.

Features - Low Input Offset Voltage: 500µV Max - Output Swings to 10mV Max from V- - Rail-to-Rail Input and Output - Micropower: 50µA/Amplifier Max - Over-The-Top® Input Common Mode Range Extends 44V Above V-, Independent of V+ - Specified on 3V, 5V and ±15V Supplies - High Output Current: 20mA - Output Drives 10,000pF with Output Compensation - Reverse Battery Protection to 18V - No Supply Sequencing Problems - High Voltage Gain: 1500V/mV - High CMRR: 98dB - No Phase Reversal - Gain Bandwidth Product: 200kHz

Application - Battery- or Solar-Powered Systems Portable Instrumentation Sensor Conditioning - Supply Current Sensing - Battery Monitoring - Micropower Active Filters - 4mA to 20mA Transmitters