The A1172 from Allegro MicroSystems Europe is an ultra-sensitive micropower Hall-effect switch with complementary, latched digital outputs and omnipolar magnetic actuation.
The device features operation at low supply currents and voltages, making it ideal for battery-operated electronics. The combination of a low operating supply voltage (1.65 V to 3.5 V) and a unique clocking algorithm assists in reducing the average operating power consumption to less than 15 mW with a 2.75 V supply.
Unlike many Hall-effect switches, both north and south polarity magnetic fields of sufficient strength activate output switching to either 'off' or 'on'. In addition, the A1172 incorporates two push-pull outputs configured so that one output switches off in the absence of sufficient magnetic field while the other output switches on in the absence of a magnetic field.
This polarity independence, as well as the minimal power requirement, allows the A1172 to easily replace reed switches, providing superior reliability and ease of manufacturing while eliminating the requirement for signal conditioning.
The A1172 includes, on a single silicon chip, a Hall-effect voltage generator, a small-signal amplifier, chopper stabilisation circuitry, a latch, and a MOSFET output. Chopper stabilisation provides improved stability through dynamic offset cancellation, reducing the residual offset voltage normally caused by device over moulding, temperature dependence and thermal stress.
The device is designed to offer a magnetically optimised solution for battery-operated, consumer equipment and is available in a 4-pin wafer level chip scale package measuring only 1 x 1 x 0.5 mm. This package is smaller than most plastic packages, which reduces the printed circuit board area consumed by these switches.
A data sheet of this product can be viewed and downloaded from: http://www.allegromicro.com/en/Products/...
About Allegro
Allegro MicroSystems, Inc. is a leader in developing, manufacturing and marketing high-performance power integrated circuits and integrated Hall-effect magnetic sensors. Allegro's innovative solutions serve high-growth applications within the automotive, communications, computer/office automation, consumer and industrial markets. Allegro is headquartered in Worcester, Massachusetts (USA) with design and applications centres located in North and South America, Asia, and Europe. Further information about Allegro can be found at www.allegromicro.com
Allegro MicroSystems Europe, headquartered in Chertsey, United Kingdom, is the European sales and marketing operation, and operates a network of representatives and distributors throughout Europe. Allegro also has an engineering design centre in Edinburgh in Scotland and an application and marketing centre in Annecy in France.
For further information please contact:
Mary Regan
Allegro MicroSystems Europe Ltd
Melita House
124 Bridge Road
Chertsey
Surrey
KT16 8LH
Tel: +33 (0) 4 50512359
Fax: +33 (0) 4 50512083
mailto:allegroeurope@allegromicro.com
http://www.allegromicro.com
Note: The above text is the public part of the press release obtained from the manufacturer (with minor modifications). EETimes Europe cannot be held responsible for the claims and statements made by the manufacturer. The text is intended as a supplement to the new product presentations in EETimes Europe magazine.
