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 150Ω compensation is used.

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
■ Tiny 3mm × 3mm × 0.8mm DFN Package

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