MAX9621AUB+T

Sensor And Detector Interfaces Overview

The MAX9621AUB+T is a dual, two-wire Hall-effect sensor interface device designed for automotive applications. It operates with a supply voltage range of 5.5 V to 18 V and withstands up to 60 V transient voltages on the BAT pin. The device features a typical operating supply current of 1 mA and supports an extended industrial temperature range from -40°C to +125°C. It provides both digital switch outputs compatible with 5.5 V logic and linear analog outputs. Integrated protection includes ±2 kV HBM and ±200 V MMD ESD ratings, along with short-circuit-to-ground fault detection that disables sensor current.

Sensor And Detector Interfaces Feature Summary

• Interfaces two 2-wire Hall-effect sensors to low-voltage microprocessors without requiring ground return leads.
• Provides simultaneous digital switch output and linear analog output for comprehensive sensor diagnostics.
• Includes robust fault management with automatic shutdown of sensor current during ground short circuits.

Sensor And Detector Interfaces Applications

• Automotive door lock control systems
• Sunroof position sensing
• Seatbelt buckle detection

Sensor And Detector Interfaces Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging rather than tube packaging when sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor datasheets prior to procurement. Ensure the component matches the exact Analog Devices part number to avoid functional discrepancies in automotive-grade specifications.

Sensor And Detector Interfaces Selection Notes

Select this component for designs requiring high-side current sensing of 2-wire Hall sensors to eliminate ground loop errors. It is suitable for environments with significant electrical noise due to built-in filtering and ESD protection. Engineers should consider the 10-pin uMAX package constraints and verify that the 5.5 V logic level compatibility meets the microprocessor input requirements.

Sensor And Detector Interfaces Part Context

The MAX9621 series serves as a successor to earlier interfaces like the MAX9921, offering enhanced integration for automotive sensor networks. It belongs to the Maxim Integrated Hall-effect sensor interface family, focusing on simplifying board layout by removing ground return paths. This evolution supports cost reduction and improved reliability in complex vehicle electronic control units.

Sensor And Detector Interfaces Replacement Considerations

The MAX9921 is a documented predecessor within the same product family. Verify if the MAX9921 meets all transient voltage and feature requirements before substitution. No other direct cross-model replacements are confirmed in public documentation.