MAX931CUA

Comparators Overview

The MAX931CUA is a single-channel micropower analog comparator manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of +2.5V to +11V (single) or ±1.25V to ±5.5V (dual). The device features an internal 1.182V ±2% bandgap reference and draws a maximum quiescent current of 4µA over the commercial temperature range of 0°C to +70°C. It provides TTL/CMOS-compatible push-pull outputs capable of sourcing up to 40mA continuously, with a typical propagation delay of 12µs at 10mV overdrive.

Comparators Feature Summary

• Ultra-low power consumption with maximum 4µA quiescent current
• Integrated 1.182V ±2% accurate bandgap voltage reference
• Adjustable hysteresis capability via dedicated HYST pin
• Push-pull output stage supporting continuous 40mA source current

Comparators Applications

• Battery-powered systems requiring low standby current
• Threshold detectors for voltage monitoring
• Window comparators for undervoltage/overvoltage protection
• Oscillator circuits utilizing internal reference
• Alarm circuits with noise margin requirements

Comparators Procurement Notes

Verify that the specific suffix 'CUA' corresponds to the µMAX package and commercial temperature range (0°C to +70°C) as defined in the official ordering information. Confirm compatibility with existing PCB footprints for the 8-lead µMAX format. Ensure design margins account for the specified input common-mode voltage limits relative to the negative supply rail.

Comparators Selection Notes

Select this component when ultra-low quiescent current is critical alongside the need for an integrated precision reference. The MAX931CUA is suitable for single-supply applications operating between 2.5V and 11V. Consider the 40mA output drive capability if direct LED driving or low-impedance load interfacing is required without external buffering.

Comparators Part Context

The MAX931CUA belongs to the MAX931-MAX934 family of micropower, low-voltage comparators. This series includes single, dual, and quad configurations sharing similar electrical characteristics and pinouts where applicable. The MAX931 variant specifically integrates one comparator channel and the internal reference, distinguishing it from the multi-channel MAX932, MAX933, and MAX934 models.

Comparators Replacement Considerations

The MAX921 is a pin-compatible alternative offering higher precision with a 1% accurate reference. Verify that the increased precision meets application requirements while maintaining compatibility with the existing board layout and supply constraints.