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
Driven by IEEE Standards, Ethernet Hits the Road in 2016
December 01, 2015
A new trend emerging in the automotive market in 2016 is the migration of Ethernet, a tried- and-true computer network technology, ...
Toshiba considers listing or partial sale of chip business
Transparent LED displays built on monolayer semiconductors
Startup wants to be the ARM of neuromorphic cores
A tech correction is coming
Delayed roadmap set for debut at TSensors Summit
November 27, 2015
The MEMS and Sensors Industry Group has announced that it will release the outline of the TSensors (Trillion Sensors) Roadmap ...
Tower buys Maxim's Texas wafer fab
Deterministic motor control with FPGAs
LG Display plans multi-billion dollar OLED plant investment
- Digital Power System Management - Take Control of Your Power Supplies
- Battery Size Matters
- Software-Defined Radio Handbook - 11th edition
- Multichemistry Buck Battery Charger Controller
InterviewCEO interview: InvenSense's Abdi on expanding MEMS horizons
InvenSense Inc. is a MEMS company that has epitomized a fabless approach to a sector that is still highly reliant on a thorough grasp of the manufacturing and packaging processes. We interviewed CEO Behrooz ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, Microsemi is giving away two SmartFusion2 dual-axis motor control starter kits, worth 9 each, for EETimes Europe's readers to win.
The kit will let you try out Microsemi's deterministic motor control solution, compliant with industry coding standards for developing safe and reliable software for embedded applications.
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.