MAX9921AUB+T

Sensor And Detector Interfaces Overview

The MAX9921AUB+T is a dual, 2-wire Hall-effect sensor interface with diagnostics. It supplies and monitors current for two sensors within a 6V to 18V operating range, withstands 60V transients at the BAT supply, and outputs logic levels compatible with low-voltage microprocessors. The device features open-drain outputs (OUT1, OUT2) and an error output (ERR). It includes input diagnostics for open circuits, battery shorts, and ground shorts, along with a blanking time of up to 140µs following power-up. Operating temperature ranges from -40°C to +125°C in a 10-pin µMAX package.

Sensor And Detector Interfaces Feature Summary

• Provides supply current monitoring and interfaces to two 2-wire Hall-effect sensors
• Includes diagnostic capabilities for detecting open inputs, battery shorts, and ground shorts
• Protects Hall sensors from overvoltage by isolating them from supply transients up to 60V
• Features low-power shutdown mode controlled by OE and DIAG inputs

Sensor And Detector Interfaces Applications

• Door modules
• Window lifters
• Seat movers
• Electric sunroofs
• Powered lift gate controllers

Sensor And Detector Interfaces Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels. Confirm RoHS compliance status indicated by the '+' suffix. Ensure the specific automotive qualification suffix '/V' is required if AEC-Q100 certification is necessary for the target application environment.

Sensor And Detector Interfaces Selection Notes

Select this component when interfacing dual 2-wire Hall-effect sensors requiring integrated fault protection. Verify that the system operates within the 6V to 18V supply voltage range. Ensure compatibility with the 10-pin µMAX package constraints and the -40°C to +125°C temperature specifications.

Sensor And Detector Interfaces Part Context

The MAX9921AUB+T belongs to the MAX9921 series of sensor interface ICs manufactured by Analog Devices / Maxim Integrated. It is designed specifically for automotive applications requiring robust Hall-effect sensor monitoring. The 'A' indicates the extended temperature grade, 'UB' denotes the 10-pin µMAX package, and '+T' signifies lead-free/RoHS compliance and tape-and-reel packaging.

Sensor And Detector Interfaces Replacement Considerations

The MAX9921AUB/V+T is a confirmed substitute part number offering identical functionality with added automotive qualification.