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Low-jitter dual-channel Hall-effect direction detection sensor IC
February 12, 2013 // Julien Happich
The A1233 from Allegro MicroSystems Europe is a dual-channel, Hall-effect direction detection sensor IC that provides digital output signals indicating the speed and direction of a rotating target.
The A1233 is a highly sensitive, temperature-stable magnetic sensing device ideal for use in ring-magnet based speed and direction systems in harsh
automotive and industrial environments. A key feature of the device is the fact that the Hall sensing elements are photolithographically aligned to better than 1 µm. This accurate mechanical location between the two active Hall elements eliminates the major manufacturing hurdle commonly encountered in fine-pitch detection applications.
The A1233 is a monolithic device containing two independent Hall-effect bipolar switches located 1.63 mm apart. It provides excellent speed and direction information for small-geometry targets. Extremely low-drift amplifiers guarantee symmetry between the switches to maintain signal quadrature. A patented high-frequency chopper-stabilisation technique cancels offsets in each channel and provides 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 in the IC for very low digital output jitter.
An on-chip low dropout (LDO) regulator allows the A1233 to be used over a wide operating voltage range. Post-assembly factory programming at Allegro provides sensitive switch-points that are symmetrical between the two switches. The A1233 comes in a plastic 8-pin SOIC surface mount package (L) and a plastic 4-pin single-inline package (K). Both versions are available for a temperature range from -40°C to +150°C. Each package is lead (Pb) free, with 100% matt tin-plated leadframe.
Visit Allegro MicroSystems Europe at www.allegromicro.com
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Technology News
Optimized RF Silicon-On-Insulator (SOI) drives monolithic integration of multi-band radios
June 19, 2013
STMicroelectronics has developed a silicon-on-insulator (SOI) CMOS process that can integrate all the RF functions of multi-band ...
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Technology News
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Technical papers
Filter Wizard
Check out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
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The SoCKIT evaluation kit is Arrow's latest development tool, featuring an Altera Cyclone V SoC with a dual-core ARM Cortex-A9 MPCore processor integrated within its 28nm FPGA fabric.
Altera SoCs allow embedded system developers to differentiate their end product with customized hardware and software, and extend the product lifecycle through hardware and software updates in the field. This month, Arrow Electronics is giving away five SoCKIT evaluation kits featuring Altera’s ARM-Based SoCs, worth €249 each, together with the free entrance to one of Arrow’s SoC workshops organized throughout Europe.
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In our previous reader offer, Freescale Semiconductor was giving away five IMX6Q, Sabre-lite kits, worth £128.06 each.
Lucky winners include Mr. X. Salada Sole from the UK, Mrs A. Peric from Germany, Mr Z. Janosy from Hungary, Mr D. Gacina from Croatia and Mr B. Boris from France. All should be receiving their packages soon. Let's wish them some interesting findings with their projects.
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December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.
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