LT1490A

The LT® 1490A is an enhanced version of the popular LT1490 op amp with improved input offset voltage (500µV max) and output voltage swing (10mV max from V). It is recommended for all new designs. The LT1490A operates on all single and split supplies with a total voltage of 2V to 44V,drawing only 40µA of quiescent current per amplifier. It is reverse supply protected; it draws virtually no current for reverse supply up to 18V. The input range of the LT1490A includes both supplies and the output swings to both supplies. Unlike most micropower op amps, the device can drive heavy loads; its rail-to-rail output drives 20mA. The LT1490A is unity-gain stable and drives all capacitive loads up to 10,000pF when optional 0.22µF and 150Ω compensation is used.


The LT1490A has 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.