Hall-Effect Switch targets battery-operated applications.
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Press Release Summary:
Model A1171 ultra-sensitive micropower Hall-effect switch features operating supply voltage of 1.65-3.5 V and consumes less than 15 µW with 2.75 V supply. Polarity specific actuation can be set by user via external selection pin to operate in unipolar mode. Available in 2 x 1.5 x 0.4 mm EW 6-pin micro-leaded DFN package, it has 2 push-pull output structures which source and sink current. Product is suited for portable or handheld communications and computer equipment.
Original Press Release:
Hall-Effect Switch Features Low Power Consumption for Battery-Operated Applications
The new A1171 from Allegro MicroSystems Europe is an ultra-sensitive micropower Hall-effect switch with latched digital outputs and either unipolar or omnipolar actuation. It features operation at low supply currents and voltages, making it ideal for battery-operated applications in portable or handheld communications and computer equipment.
The low operating supply voltage (1.65 V to 3.5 V) and unique clocking algorithm assist in reducing the average operating power consumption: typically less than 15 µW with a 2.75 V supply.
Unlike some traditional Hall-effect switches, the A1171 allows the user to configure how the device is magnetically actuated. Under default conditions the device will activate output switching with either a north or south polarity magnetic field of sufficient strength. The polarity specific actuation can be set by the user via an external selection pin to operate in a unipolar mode, switching only on a north or south polarity field.
The new device has two push-pull output structures, which source and sink current to eliminate the need for external pull-up resistors. This polarity independence, as well as the minimal power requirements, allows the A1171 to easily replace reed switches, providing superior reliability and ease of manufacturing while eliminating the requirement for signal conditioning.
The A1171 is currently available in the EW 6-pin micro-leaded DFN package measuring 2 mm x 1.5 mm x 0.4 mm.
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 centre in Annecy in France.
