28 Jun '16, 9am

Magnetic speed sensor rejects offsets: Allegro MicroSystems’ surface-mount magnetic speed sensor...

Magnetic speed sensor rejects offsets: Allegro MicroSystems’ surface-mount magnetic speed sensor...

Allegro MicroSystems’ surface-mount magnetic speed sensor contains a compensating circuit that reduces the detrimental effects of magnet and system offsets. “Digital processing of the analogue signal provides zero-speed performance independent of air gap as well as dynamic adaptation of device performance to the typical operating conditions found in automotive applications, including reduced vibration sensitivity,” said the firm. Called A1667 , to comes in an SOIC-8 package and is intended to work with ring magnets. Dual Hall elements allow switching in response to differential magnetic signals created by the magnet, and peak-detecting DACs are used to set the adaptive switching thresholds. Hysteresis in the thresholds reduces negative effects of anomalies in the magnetic signal. The open-drain output is configured for three-wire applications. As well as the 8pin SOIC (suf...

Full article: http://www.electronicsweekly.com/news/products/sensors-pr...

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