ADCMP394ARZ

Overview

The ADCMP394ARZ is a single-channel rail-to-rail input analog comparator manufactured by Analog Devices Inc. It operates on a single supply voltage ranging from 2.3 V to 5.5 V and draws a typical quiescent current of 33.9 µA. The device features an accurate buffered reference output of 1 V ± 0.9% and guarantees a defined logic low output state during undervoltage lockout (UVLO). It includes a common-mode rejection ratio of 74 dB, a power supply rejection ratio of 80 dB, and an input offset voltage of 2.5 mV maximum. Propagation delay ranges from 4.7 µs to 9.7 µs depending on overdrive conditions.

Feature Summary

• Rail-to-rail input stage allowing operation 200 mV beyond the supply rails
• Integrated 1 V buffered reference output for precise threshold setting
• Guaranteed logic low output state upon power-up via UVLO monitoring
• Open-drain output configuration requiring external pull-up resistor

Applications

• Battery management and monitoring systems
• Power supply detection circuits
• Window comparators for positive and negative voltage monitoring
• Threshold detectors and discriminators
• Microprocessor system supervisory circuits

Procurement Notes

Verify the specific package type matches the required PCB footprint, as this model utilizes an 8-lead narrow body SOIC. Confirm that the application circuit provides an appropriate pull-up resistor for the open-drain output. Ensure the operating temperature range aligns with the specified -40°C to +125°C limits. Validate that the supply voltage remains within the 2.3 V to 5.5 V operational window.

Selection Notes

Select this component when a single comparator channel with an integrated reference is required. It is suitable for battery-powered applications due to its low supply current consumption. Consider the open-drain output requirement if interfacing with different logic voltage levels. Verify that the propagation delay specifications meet the timing requirements of the target signal processing application.

Part Context

This part belongs to the ADCMP394/ADCMP395/ADCMP396 family of comparators. While the ADCMP394 offers a single channel in an 8-lead SOIC package, the ADCMP395 provides dual channels in a 10-lead MSOP, and the ADCMP396 offers four channels in a 16-lead SOIC. All variants share identical electrical characteristics and pin functions relative to their channel count.

Replacement Considerations

Direct functional replacements within the same series include the ADCMP395 and ADCMP396, provided the package form factor and channel count requirements are accommodated.