General Description

The MAX917–MAX920 nanopower comparators in space-saving SOT23 packages feature Beyond-the-Rails™ inputs and are guaranteed to operate down to +1.8V. The MAX917/MAX918 feature an on-board 1.245V ±1.5 reference and draw an ultra-low supply current of only 750nA, while the MAX919/MAX920 (without reference) require just 380nA of supply current. These features make the MAX917–MAX920 family of comparators ideal for all 2-cell battery applications, including monitoring/management.

Features

♦ Ultra-Low Supply Current

   380nA per Comparator (MAX919/MAX920)

   750nA per Comparator with Reference

   (MAX917/MAX918)

♦ Guaranteed to Operate Down to +1.8V

♦ Internal 1.245V ±1.5 Reference

   (MAX917/MAX918)

♦ Input Voltage Range Extends 200mV

   Beyond-the-Rails

♦ CMOS Push-Pull Output with ±8mA Drive

   Capability (MAX917/MAX919)

♦ Open-Drain Output Versions Available

   (MAX918/MAX920)

♦ Crowbar-Current-Free Switching

♦ Internal Hysteresis for Clean Switching

♦ No Phase Reversal for Overdriven Inputs

♦ Space-Saving SOT23 Package

Applications

   2-Cell Battery Monitoring/Management

   Ultra-Low-Power Systems

   Mobile Communications

   Notebooks and PDAs

   Threshold Detectors/Discriminators

   Sensing at Ground or Supply Line

   Telemetry and Remote Systems

   Medical Instruments