LT1490

LT1490/LT1491 Dual and Quad Micropower Rail-to-Rail Input and Output Op Amps FEATURES s s s s s s s s s s s s 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. The LT1490/LT1491 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 22V. There is no phase reversal of the output for inputs 22V below V – or 44V above V –, independent of V +. The LT1490 dual op amp is available in the 8-pin SO and PDIP packages. The quad LT1491 is available in the 14-pin SO and PDIP packages. , LTC and LT are registered trademarks of Linear Technology Corporation. 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 Ou...