• 简体中文
• English

LTC1442 - Ultralow Power Single/Dual Comparator with Reference

The LTC®1440/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.

特点 Ultralow Quiescent Current: 2.1µA Typ (LTC1440) Reference Output Drives 0.01µF Capacitor Adjustable Hysteresis (LTC1440/LTC1442) Wide Supply Range: Single: 2V to 11V Dual: ±1V to ±5.5V Input Voltage Range Includes the Negative Supply TTL/CMOS Compatible Outputs 12µs 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 (LTC1440) 典型应用

应用 Battery-Powered System Monitoring Threshold Detectors Window Comparators Oscillator Circuits 封装信息