ADI LT1491ACS#PBF

The LT1490A/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 150 compensation 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 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. For space limited applications LT1490A is available in a 3mmx3mmx0.8mm, dual fine pitch leadless package (DFN). The quad LT1491A is available in the 14-pin SO, PDIP and 5mmx3mmx0.8mm DFN packages.

• 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

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