Press Release
Ultra-sensitive dual-channel quadrature Hall-effect bipolar switch
The new A1230 from Allegro MicroSystems Europe is an ultra-sensitive dual-channel quadrature Hall-effect bipolar switch IC designed for use in rotating ring-magnet based speed and direction sensing applications in harsh automotive and industrial environments.
The A1230 is a highly sensitive, temperature-stable magnetic sensing device incorporating two Hall-effect sensing elements spaced 1 mm apart, each providing a separate digital output for speed and direction signal processing. The digital outputs are out of phase so that the outputs are in quadrature when interfaced with the proper ring-magnet design, allowing easy processing of the speed and direction signals.
The two Hall elements are photolithographically aligned to better than 1 µm: an accuracy which has not previously been achieved in fine-pitch detection applications. Extremely low-drift amplifiers guarantee symmetry between the switches to maintain signal quadrature. The Allegro(R) patented, high-frequency chopper-stabilisation technique cancels offsets in each channel, providing stable operation over the full specified temperature and voltage ranges.
The high-frequency chopping circuits also allow an increased analogue signal-to-noise ratio at the input of the digital comparators within the IC. As a result, the A1230 achieves industry-leading digital output jitter performance that is critical in high-performance motor commutation applications.
An on-chip low dropout (LDO) regulator allows the A1230 to be used over a wide operating voltage range. Post-assembly factory programming at Allegro provides sensitive switchpoints that are symmetrical between the two switches.
The A1230 features integrated electrostatic discharge protection between outputs and supply voltage to ground, a robust structure for EMC protection, and reverse battery protection on supply and both output pins.
The A1230 is available in a plastic 8-pin SOIC surface-mount package (L) and a plastic 4-pin SIP (K). Both are available in a temperature range of -40°C to +150°C. Each package is lead (Pb) free, with 100% matt tin-plated leadframe.
To view the data sheet click below:
http://www.allegromicro.com/en/Products/Part_Numbers/1230/1230.pdf
About Allegro
Allegro MicroSystems, Inc. is a leader in developing, manufacturing and marketing high-performance power and Hall-effect sensor integrated circuits . 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.
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