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MAX9028：UCSP, 1.8V, Nanopower, Beyond-the-Rails Comparators With/Without Reference

The MAX9025–MAX9028 nanopower comparators in space-saving chip-scale (UCSP™) packages feature Beyond-the-Rails™ inputs and are guaranteed to operate down to +1.8V. The MAX9025/MAX9026 feature an on-board 1.236V ±1% reference and draw an ultra-low supply current of only 1µA, while the MAX9027/MAX9028 (without reference) require just 0.6µA of supply current. These features make the MAX9025–MAX9028 family of comparators ideal for all 2-cell battery-monitoring/management applications. The unique design of the output stage limits supply-current surges while switching, virtually eliminating the supply glitches typical of many other comparators. This design also minimizes overall power consumption under dynamic conditions. The MAX9025/MAX9027 have a push-pull output stage that sinks and sources current. Large internal-output drivers allow rail-to-rail output swing with loads up to 5mA. The MAX9026/MAX9028 have an open-drain output stage that makes them suitable for mixed-voltage system design. All devices are available in the miniature 6-bump UCSP packages. Refer to the MAX9117 data sheet for similar comparators in 5-pin SC70 packages and the MAX9017 data sheet for similar dual comparators in 8-pin SOT23 packages.

Key Features Space-Saving UCSP Package (1mm x 1.52mm) Ultra-Low Supply Current 0.6µA (MAX9027/MAX9028) 1µA with Reference (MAX9025/MAX9026) Guaranteed to Operate Down to +1.8V Internal 1.236V ±1% Reference (MAX9025/MAX9026) Input Voltage Range Extends 200mV Beyond-the-Rails CMOS Push-Pull Output with ±5mA Drive Capability (MAX9025/MAX9027) Open-Drain Output Versions Available (MAX9026/MAX9028) Crowbar-Current-Free Switching Internal Hysteresis for Clean Switching No Phase Reversal for Overdriven Inputs

MAX9025, MAX9026, MAX9027, MAX9028: Functional Diagram Applications/Uses 2-Cell Battery Monitoring/Management Medical Instruments Mobile Communications Notebooks and PDAs Sensing at Ground or Supply Line Telemetry and Remote Systems Ultra-Low-Power Systems

DataSheet

Parametrics

Quality and Environmental Data

• MAX9028.pdf

Ordering Information