Said to ease implementation efforts, the company’s first 1-MHz bandwidth Hall-effect current sensor IC specifies a 210-ns response time. Typical applications include motor control, load detection and management, switched-mode power supplies, and overcurrent fault protection.
The device consists of a linear Hall sensor circuit with a copper conduction path located near the surface of the die. Applied current flowing through the copper conduction path generates a magnetic field that is sensed by the integrated Hall IC and converted into a proportional voltage. Device accuracy is optimized through the close proximity of the magnetic field to the Hall transducer. A precise, proportional voltage is provided by the Hall IC, which is programmed for accuracy after packaging. The ACS730 is priced at $1.77 each/1,000. For more details and specs, go to http://www.allegromicro.com/en/Products/Current-Sensor-ICs/Zero-To-Fifty-Amp-Integrated-Conductor-Sensor-ICs/ACS730.aspx