LT1490CMS8

运算放大器 - 运放 LT1490 - Dual and Quad Micropower Rail-to-Rail Input and Output Op Amps

DESCRIPTION

The dual LT®1490 and quad LT1491 op amps 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 no current for reverse supply up to 18V. The input range of the LT1490/LT1491 includes both supplies and the output swings to both supplies. Unlike most micropower op amps, the LT1490/LT1491 can drive heavy loads; their rail-to-rail outputs drive 20mA. The LT1490/LT1491 are unity-gain stable and drive all capacitive loads up to 10,000pF when optional 0.22µF and 150Ω compensation is used.

FEATURES

■ Rail-to-Rail Input and Output

■ Single Supply Input Range: –0.4V to 44V

■ Micropower: 50µA/Amplifier Max

■ 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

APPLICATIONS

■ Battery- or Solar-Powered Systems

   Portable Instrumentation

   Sensor Conditioning

■ Supply Current Sensing

■ Battery Monitoring

■ Micropower Active Filters

■ 4mA to 20mA Transmitters