MAX9022ASA

Overview

The MAX9022ASA is a dual micropower comparator from the MAX9021/MAX9022/MAX9024 family, designed for low-power consumption with fast output response. It operates on a single supply voltage ranging from 2.5V to 5.5V or dual supplies. The device features a typical propagation delay of 3μs and consumes only 2.8μA of supply current per comparator across the -40°C to +125°C temperature range. It includes 4mV of built-in hysteresis for noise immunity and prevents oscillations during slow-moving input signals. The input common-mode range extends from the negative supply to within 1.1V of the positive supply.

Feature Summary

• Low power consumption with 2.8μA supply current per comparator
• Internal 4mV hysteresis for noise immunity
• Rail-to-rail output swing capability
• No phase reversal for overdriven inputs

Applications

• Battery-powered portable systems
• Mobile communications
• Sensor-signal detection
• Photodiode preamps
• Threshold detectors/discriminators

Procurement Notes

Verify the specific ordering suffix to confirm package type and RoHS compliance status. Confirm availability through authorized distributors as stock levels fluctuate. Ensure the operating temperature range matches the application requirements. Check for lead-free packaging if required by environmental regulations. Validate pin configurations against the target PCB layout.

Selection Notes

Select this component for applications requiring ultra-low power consumption in space-constrained designs. The dual configuration offers two independent comparators in an 8-pin package. Consider the 3μs propagation delay for timing-sensitive circuits. The wide common-mode input range simplifies biasing in single-supply systems. Evaluate the internal hysteresis needs before adding external components.

Part Context

The MAX9022ASA belongs to the MAX902x series of micropower comparators manufactured by Analog Devices/Maxim Integrated. This series includes single (MAX9021), dual (MAX9022), and quad (MAX9024) variants. The ASA suffix indicates an 8-pin SO package with an automotive temperature range of -40°C to +125°C. These devices are optimized for portable applications due to their small footprint and low current draw.

Replacement Considerations

Direct substitutes include other parts from the MAX9021/MAX9022/MAX9024 family with compatible packages. Verify electrical parameters such as supply current and propagation delay match the original design requirements. Ensure the replacement part supports the same voltage range and temperature specifications.