Extremely Low Noise, Programmable Linear Hall-Effect Sensors


Allegro MicroSystems, Inc. announces a new family of linear Hall-effect sensors that are fully programmable with low noise and a very high bandwidth.  The A1360/1/2 devices are ideally suited for use in high frequency, current sensing applications due to the extremely low noise (as low as 8 mV (p-p)), flat temperature coefficient (0 %/°C) and high bandwidth capability (typically 50 kHz). These devices also boast Allegro’s first 1 mm thin, 4-lead SIP (KT-package), which allows for extremely small gaps in various concentrator and C-core systems to improve the signal-to-noise ratio and sensitivity.
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 50 kHz to less than 100 Hz. 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% (bidirectional) or 10% (unidirectional) of the supply voltage (VCC). Each device has a guaranteed, programmable, sensitivity range: 0.7 to 1.4 mV/G (A1360), 1.5 to 4.5 mV/G (A1361) and 4.5 to 16 mV/G (A1362).
The features of this linear Hall-effect family make these sensors ideal for high accuracy requirements in automotive and industrial current sensing applications. Device specifications are guaranteed over an extended temperature range, -40°C to 150°C.


* 1 mm case thickness provides greater coupling for current sensing applications * Customer programmable offset and sensitivity * Factory programmed 0% / °C sensitivity temperature coefficient * Programmability at end-of-line * Selectable unipolar or bipolar quiescent voltage levels * Selectable sensitivity ranges between 0.7 and 1.4 mV/G (A1360), 1.4 to 4.5 mV/G (A1361) and 4.5 to 16 mV/G (A1362) * Device bandwidth selectable under 50 kHz, via capacitor on FILTER pin * Ratiometric sensitivity, quiescent voltage output, and clamps for interfacing with application DAC * Temperature-stable quiescent voltage output and sensitivity * Precise recoverability after temperature cycling * Output voltage clamps provide short circuit diagnostic capabilities * Wide ambient temperature range: –40°C to 150°C * Resistant to mechanical stress
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