MAX9022AKA-T

Overview

The MAX9022AKA-T is a dual micropower comparator from the MAX9021/MAX9022/MAX9024 series, designed for low-power portable applications. It operates on a single supply voltage ranging from 2.5V to 5.5V or dual supplies of ±1.25V to ±2.75V. The device consumes 2.8µA per comparator over an operating temperature range of -40°C to +125°C. It features a typical propagation delay of 3µs and includes 4mV of internal hysteresis to prevent oscillations with slow-moving signals. The input common-mode range extends from the negative supply to within 1.1V of the positive supply, supporting rail-to-rail output swing.

Feature Summary

• Ultra-low power consumption optimized for battery-operated systems
• Internal 4mV hysteresis provides noise immunity and prevents output oscillation
• Rail-to-rail output swing capability with reduced switching current transients
• No phase reversal occurs when inputs are overdriven beyond the supply rails

Applications

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

Procurement Notes

Verify the specific ordering suffix 'T' indicates tape-and-reel packaging configuration. Confirm RoHS compliance status by checking for the '+' designation in the part number, as standard versions may differ. Ensure the package code 'KA' corresponds to the 8-pin SOT23 footprint required for the design layout. Cross-reference the manufacturer's latest datasheet revision to confirm pinout and electrical characteristics remain unchanged.

Selection Notes

Select this component when space-constrained designs require dual comparators with minimal quiescent current. The 8-pin SOT23 package offers a compact solution compared to larger SO packages. Consider the 3µs propagation delay for timing-sensitive applications. Verify that the 4mV internal hysteresis meets noise rejection requirements without external feedback resistors. Ensure the input common-mode range accommodates the signal levels relative to the negative supply rail.

Part Context

This device belongs to the MAX902x family of micropower comparators, which also includes single-channel (MAX9021) and quad-channel (MAX9024) variants. The family shares identical electrical specifications and pinout compatibility across channel counts, facilitating scalable design transitions. The MAX9022 specifically provides two independent comparators in an 8-pin surface-mount package, balancing performance and board area efficiency for portable electronics.

Replacement Considerations

The MAX9092/MAX9093/MAX9094/MAX9095 series serves as a pin-for-pin compatible replacement for older LMX393/LMX339 devices, but differs significantly in power and speed specifications compared to the MAX902x family. Direct substitution requires verifying supply voltage ranges and propagation delay tolerances. No other direct cross-model replacements are documented within the MAX902x series itself.