MAX9031AUK+G55

Overview

The MAX9031AUK+G55 is a single-channel analog comparator from the MAX9031 series, manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of +2.5V to +5.5V and consumes a typical supply current of 35µA per comparator. The device features an internal hysteresis of 4mV and a propagation delay of 188ns at a 100mV overdrive. Input offset voltage is typically ±1mV with a maximum of ±5mV. It utilizes a 5-pin SOT23 package and supports an operating temperature range from -40°C to +125°C.

Feature Summary

• Rail-to-rail output capability for full signal swing utilization
• Internal 4mV hysteresis ensures noise immunity and prevents oscillations during slow input transitions
• No phase reversal occurs even when inputs are overdriven beyond the common-mode range
• Ultra-small 5-pin SC70 or SOT23 footprint designed for space-constrained portable applications

Applications

• Battery-powered portable systems
• Mobile communications equipment
• Sensor signal detection circuits
• Photodiode preamplifier interfaces
• Threshold detectors and discriminators

Procurement Notes

Verify that the specific suffix G55 aligns with the manufacturer's standard ordering nomenclature for the MAX9031AUK+T variant. Confirm RoHS compliance status as indicated by the plus sign in the base part number. Ensure the package type matches the required 5-pin SOT23 configuration for your PCB layout constraints before finalizing procurement.

Selection Notes

Select this component when a low-cost, single-supply comparator with minimal power consumption is required. The built-in hysteresis eliminates the need for external feedback resistors in many noise-prone environments. Consider the 188ns propagation delay and 35µA quiescent current against system timing and battery life requirements compared to faster or higher-current alternatives.

Part Context

This device belongs to the MAX9030/MAX9031/MAX9032/MAX9034 family of ultra-small, single/dual/quad comparators. While the MAX9030 includes a shutdown pin, the MAX9031 variant lacks this feature but retains the same electrical characteristics and compact packaging. The family is optimized for single-supply operation down to +2.5V, making it suitable for portable electronics where power efficiency and board space are critical design factors.

Replacement Considerations

Direct substitutes include other MAX9031 variants such as MAX9031AXK+T (SC70 package) or MAX9031AUK+T (SOT23 package). Verify pin compatibility and electrical specifications match exactly before substitution.