MAX9031AUK-T

Overview

The MAX9031AUK-T is a single-channel analog comparator from the MAX9030/MAX9031/MAX9032/MAX9034 family, manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single supply voltage ranging from +2.5V to +5.5V and consumes a typical supply current of 35µA per comparator over an operating temperature range of -40°C to +125°C. The device features a propagation delay of 188ns (typical) with a maximum of 228ns at low overdrive. It includes built-in hysteresis of 4mV to prevent oscillation during slow input transitions. The output stage provides rail-to-rail swing in a push-pull configuration. Input offset voltage is typically ±1mV, and the common-mode input range extends from the negative supply to within 1.1V of the positive supply.

Feature Summary

• Ultra-small footprint available in space-saving 5-pin SC70 and SOT23 packages
• Internal 4mV hysteresis ensures noise immunity and prevents oscillations with slow-moving signals
• Rail-to-rail output swings eliminate the need for external pull-up resistors
• No phase reversal occurs for overdriven inputs

Applications

• Battery-powered portable systems
• Mobile communications equipment
• Sensor signal detection circuits
• Photodiode preamplifier interfaces
• Digital line receivers and threshold detectors

Procurement Notes

Verify the specific ordering suffix 'T' indicates tape-and-reel packaging when sourcing components. Confirm that the part number corresponds to the lead-free/RoHS-compliant variant denoted by the '+' symbol if environmental compliance is required. Ensure the package code matches the physical footprint requirements of the target PCB layout. Cross-reference the manufacturer's latest documentation for any updates to pin configurations or electrical characteristics prior to final procurement.

Selection Notes

Select this component for applications requiring low power consumption and minimal board space. The single-channel configuration suits designs needing one comparison function without shutdown capability. Consider the 188ns propagation delay for timing-sensitive digital interfaces. Verify that the input signal amplitude exceeds the internal hysteresis band for reliable switching. Evaluate the thermal dissipation limits based on the selected package type and ambient operating conditions.

Part Context

The MAX9031 is part of a broader family of low-cost, ultra-small comparators including the dual MAX9032 and quad MAX9034 variants. Unlike the MAX9030, which includes a shutdown pin, the MAX9031 lacks this feature, offering continuous operation. The device is optimized for single-supply operation but can function with dual supplies. It shares core electrical characteristics with its siblings, differing primarily in channel count and package options.

Replacement Considerations

Direct substitutes within the same family include the MAX9031AXK+T, which utilizes the 5-pin SC70 package instead of the SOT23-5 package found in the AUK variant. Both parts share identical electrical specifications and pinouts relative to their respective packages. Ensure mechanical compatibility with the existing footprint when swapping between SC70 and SOT23 versions.