Two-Wire, Zero-Speed, High-Accuracy Differential Hall-Effect Sensor IC

A1684

The A1684 offers a simplified two-wire solution for speed and position sensing of ring magnets or gear teeth, featuring true zero-speed operation, automatic gain control, and advanced calibration algorithms for robust performance in automotive applications.

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Product Details

Top Features

Integrated capacitor reduces requirement for external EMI protection component
Fully optimized differential digital ring magnet and gear tooth sensor IC
Running Mode Lockout
Unique algorithms to assist in mitigation of system anomalies such as vibration
AGC and reference adjust circuit
Air gap independent switchpoints
Digital output representing target mechanical profile
Precise duty cycle throughout operating temperature range
Short power-on time
True zero-speed operation
Undervoltage lockout (UVLO)
Wide operating voltage range
Internal current regulator for two-wire operation
Robust test coverage capability using Scan Path and IDDQ measurement
AEC-Q100 automotive qualified

Target Application

Transmission
2W-xEV Power
2W-Powertrain
2W-xEV Power
Recreational Vehicles

Part Number Specifications and Availability

Differential Speed Sensor System Solutions

Seth Prentice, Strategic Marketing Manager for Allegro MicroSystems Speed Sensor IC group, discusses IC solutions for designing speed sensing applications including automotive transmissions, washing machine drum speeds, and fork lift positioning requiring reliable consistent output signals.

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