LT1491A Datasheet | Linear Technology

LT1490A/LT1491A Dual/Quad Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps Features DESCRIPTION n Low Input Offset Voltage: 500μV Max n Output Swings to 10mV Max from V- n Rail-to-Rail Input and Output n Micropower: 50μA/Amplifier Max n Over-The-Top® Input mon Mode Range Extends 44V Above V- , Independent of V+ n Specified on 3V, 5V and ±15V Supplies n High Output Current: 20mA n Output Drives 10,000pF with Output pensation n Reverse Battery Protection to 18V n No Supply Sequencing Problems n High Voltage Gain: 1500V/mV n High CMRR: 98dB n No Phase Reversal n Gain Bandwidth Product: 200kHz n Tiny 3mm × 3mm × 0.8mm DFN Package APPLICATIONS n Battery- or Solar-Powered Systems Portable Instrumentation Sensor Conditioning n Supply Current Sensing n Battery Monitoring n Micropower Active Filters n 4mA to 20mA Transmitters 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 150Ω pensation 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 mon mode even when operating on a 3V supply. Built-in resistors protect the...