ADI LTC1440IMS8

The LTC1440/LTC1441/LTC1442 are ultralow power single and dual comparators with built-in references. The comparators feature less than 3.7μA supply current over temperature (LTC1440), a 1.182V±1% reference, programmable hysteresis (LTC1440/LTC1442) and TTL/CMOS outputs that sink and source current. The reference output can drive a bypass capacitor of up to 0.01μF without oscillation. The comparators operate from a single 2V to 11V supply or a dual ±1V to ±5.5V supply (LTC1440). Comparator hysteresis is easily programmed by using two resistors and the HYST pin (LTC1440/LTC1442). Each comparator's input operates from the negative supply to within 1.3V of the positive supply. The comparator output stage can continuously source up to 40mA. By eliminating the cross-conducting current that normally happens when the comparator changes logic states, the power supply glitches are eliminated. The LTC1440 is available in 8-pin PDIP, SO, MSOP and DFN packages. The LTC1441/LTC1442 are available in 8-pin PDIP and SO packages.

• Ultralow Quiescent Current: 2.1 μA Typ
• Reference Output Drives 0.01 μF Capacitor
• Adjustable Hysteresis
• Wide Supply Range: Single: 2V to 11V Dual: ±1V to ±5.5V
• Input Voltage Range Includes the Negative Supply
• TTL/CMOS Compatible Outputs
• 12 μs Propagation Delay with 10mV Overdrive
• No Crowbar Current
• 40mA Continuous Source Current
• Pin Compatible Upgrades for MAX921/922/923
• 3mm x 3mm x 0.75mm DFN Package

• Battery-Powered System Monitoring
• Threshold Detectors
• Window Comparators
• Oscillator Circuits