Allegro MicroSystems’ ATS344 back-biased, programmable Hall-effect sensor IC is packaged in a custom back-biased package that includes an integrated magnet. The device incorporates a 2-wire current mode PWM output to help minimize pin count for remote sensors. It also includes on-chip EEPROM technology, capable of supporting up to 100 read/write cycles, for flexible end-of-line programming of calibration parameters. The ATS344 is suitable for automotive applications requiring high resolution detection of long stroke (>5 mm) linear motion.
The integrated back-bias magnet greatly simplifies packaging, requiring only a ferrous target to detect. The ATS344 is offered in a Pb free, 100% matte-tin leadframe plated 3-pin SP package. Pricing is $3.825 each/1,000. Need to get rolling, but need more details? Peruse the ATS344 datasheet.