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Hall-effect sensors claim low noise, high bandwidth

Posted: 31 Mar 2008 ?? ?Print Version ?Bookmark and Share

Keywords:programmable Hall-effect sensors? current sensing?

Allegro MicroSystems Inc. has introduced a new family of fully programmable linear Hall-effect sensors with low noise and a very high bandwidth.

The A1360/1/2 devices are well-suited for use in high-frequency automotive and industrial current sensing applications due to its noise level of 8mV(p-p), flat temperature coefficient (0 percent/C) and high-bandwidth capability (typically 50kHz).

The accuracy of these devices is enhanced through the programmability on the output pin of the device. A capacitor-to-ground on the filter pin of the A136x can be used to tune the device bandwidth in a range from 50kHz to less than 100Hz. These ratiometric Hall-effect sensors provide a voltage output that is proportional to the applied magnetic field. The quiescent output voltage is user adjustable to 50 percent (bidirectional) or 10 percent (unidirectional) of the supply voltage (VCC).

Each device offers a guaranteed, programmable, sensitivity range: 0.7-1.4mV/G (A1360), 1.5-4.5mV/G (A1361) and 4.5-16mV/G (A1362). Device specifications are guaranteed over an extended temperature range of -40C to 150C.

The devices are packaged in Allegro's 1mm thin, 4-lead SIP (KT-package), which allows for extremely small gaps in various concentrator and C-core systems to improve SNR and sensitivity.

Pricing starts at $1.28 in quantities of 1,000. Availability is 14 to 16 weeks typical.

- Gina Roos

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