Hall-effect sensor IC has PWM output

Operating over a wide ambient temperature range of –40° to 150°C, the A1357 linear Hall-effect sensor IC is a high precision, customer programmable, Hall-effect linear IC with a PWM, current sourced (2-wire) output. The device converts an analog signal from its internal Hall sensor element to a digitally encoded PWM signal. The coupled noise immunity of the digitally encoded PWM is far superior to the noise immunity of an analog output signal.

The BiCMOS, monolithic circuit inside of the part integrates a Hall element, precision temperature-compensating circuitry to reduce the intrinsic sensitivity and offset drift of the Hall element, a small-signal high-gain amplifier, proprietary dynamic offset cancellation circuits, and PWM conversion circuitry. It is housed in a lead-free three-pin single inline package and features optional 50% duty cycle calibration test mode at device power up. ($1.50 ea/1,000 — available now.)

By Christina Nickolas

Allegro MicroSystems , Worcester , MA
Sales 508-853-5000

www.allegromicro.com