MAX9028EBT+T

Overview

The MAX9028EBT+T is a nanopower comparator in a 6-bump UCSP package. It operates on a supply voltage range of +1.8V to +5.5V with a typical supply current of 0.6µA at +5V and 0.75µA at +1.8V. The device features an open-drain output stage capable of sinking up to 35mA and sourcing up to 3mA, with an output leakage current of 1µA maximum. Input common-mode voltage extends 200mV beyond the rails (VEE - 0.2V to VCC + 0.2V). Propagation delay ranges from 14µs to 16µs depending on supply voltage. Internal hysteresis is 4mV, and input offset voltage is typically 5mV.

Feature Summary

• Ultra-low power consumption requiring only 0.6µA supply current
• Open-drain output stage suitable for mixed-voltage system designs
• Input voltage range extends 200mV beyond-the-rails
• Internal hysteresis ensures clean switching without external components

Applications

• 2-cell battery monitoring and management systems
• Ultra-low-power portable electronic devices
• Logic-level translation between different voltage domains
• Zero-crossing detection circuits
• Medical instruments and telemetry remote systems

Procurement Notes

Verify that the ordering suffix 'BT' corresponds to the 6-bump UCSP package configuration and '+T' indicates tape-and-reel packaging. Confirm RoHS compliance status as indicated by the '+' designation. Ensure the specific revision level matches design requirements, noting that datasheet revisions may update absolute maximum ratings or electrical characteristics over time.

Selection Notes

Select this component when an open-drain output is required for wire-OR logic or mixed-voltage interfacing. The MAX9028 lacks an internal reference; use MAX9025 or MAX9026 if a 1.236V reference is needed. Consider propagation delays in the microsecond range unsuitable for high-speed applications. Verify that the 4mV internal hysteresis meets noise immunity requirements for the specific signal environment.

Part Context

This part belongs to the MAX9025–MAX9028 family of nanopower comparators designed for space-saving chip-scale packages. The family shares identical pinouts and core comparator architecture but varies by output type and reference inclusion. The MAX9028 specifically provides the open-drain variant without an internal reference, distinguishing it from the push-pull MAX9027 and the reference-equipped MAX9025/MAX9026 models.

Replacement Considerations

Direct functional substitutes within the same package include MAX9025EBT+T, MAX9026EBT+T, and MAX9027EBT+T. Note that MAX9025/26 include an internal reference and MAX9027 uses a push-pull output. Cross-family replacements like MAX9017 or MAX9117 offer different package sizes.