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Hall Sensor Interface Provides Analog And Digital Outputs

March 11, 2010
The MAX9621 dual, two-wire Hall-effect sensor interface offers an analog output for linear information and a digital output for Hall-effect switches

The MAX9621 dual, two-wire Hall-effect sensor interface offers an analog output for linear information and a digital output for Hall-effect switches. The device enables the microprocessor to monitor the status of Hall-effect sensors either through the analog output by mirroring the sensor current for linear information or through the filtered digital output. Input-current threshold is programmable for the digital output and a high-side current-sense architecture eliminates the need for a ground-return wire without introducing ground shift. The MAX9621 protects sensors from supply transients up to 60V and short-to-ground conditions and specifies a minimum of 50-ms blanking time following Hall-effect sensor power-up or restart. Available in a 10-pin, 3 mm x 5 mm microMAX package operating from a 5.5V to 18V supply, pricing starts at $0.87 each/1,000. MAXIM INTEGRATED PRODUCTS, Sunnyvale, CA. (800) 998-8800.

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