PORTLAND, Ore. — Micro-electromechanical systems (MEMS) are usually removing smaller and smaller as good as aloft and aloft performance. Take STMicroelectronics’ new 6-axis IMU designed privately to be competent for a Automotive Electronics Council’s A-100 stress-test gift for integrated circuits. In further to being low-noise with softened outlay resolution, a 6-axis A-100 competent IMU also claims a pretension of a world’s smallest, measuring usually 3x3x1.1 millimeters.
The explain binds for now: Most homogeneous products from competitors are during 4×4 mm. “The augmenting seductiveness in automotive telematics and navigation is pulling a need for improved opening and smaller size,” pronounced Anton Hofmeister, organisation clamp boss and ubiquitous manager, Custom MEMS Division. Combining an accurate accelerometer and gyroscope on a singular die, “is a clever matter of a expertise,” he told us.
Automotive, however, has not been ST’s honeyed spot. Consumer applications have been a company’s strength, so it creates clarity that a pull into automotive would start with non-critical applications, that it has already been producing for automobiles given 2011, according to Jeremie Bouchaud, comparison director, MEMS and Sensors during IHS. The new ASM330LXH combo MEMS sensor is designed for non-critical automotive applications like navigation and telematics.
Bouchaud told EE Times:
- ST dominates a MEMS marketplace for consumer and mobile applications (21% income share in 2013) and started leveraging a position in consumer MEMS to enhance in automotive MEMS in 2011. Its share is still really tiny in automotive (0.7% in 2013) though it’s a visitor determined suppliers such as Bosch, Freescale, ADI, and Murata (former VTI) contingency take seriously.
ST logically started to enter a MEMS marketplace for automotive with non-safety vicious applications with accelerometers in 2011 and with gyroscopes in 2012. The ASM330LXH combo is also targeting non-safety applications, though there is no doubt that ST will also aim a sepulchral marketplace of combo for reserve applications for electronic-stability control and rollover. One should note that ST already done inroads in reserve applications with accelerometers for airbags given a finish of 2013.
ST chose a THELMA (Thick Epitaxial Layer for Micro-Gyroscopes and Accelerometers) routine to assist in integrating acceleration and angular-rate (gyroscope) onto a same square of silicon. Not usually does THELMA assure ideal information synchronization between a dual sensors’ outputs, according to ST, though it also simplifies a designation of a 6-axis combo sensor on a printed-circuit house (PCB) by strange apparatus manufacturers, according to Bouchaud:
- The categorical advantage of charity a 6-axis IMU in automotive is a high coherence it offers a automotive Tier 1 in a assembly. The PCB is not always straight or horizontal; it is mostly during an angle. We saw in a teardowns infrequently formidable constructions in a public of a sensor to recompense for a angle of a PCB when a single-axis gyroscope is used, for instance. With such a 6-axis combo sensor a public and formation of a sensor is extremely eased.
ST says it is targeting a ASM330LXH IMU during in-dash car-navigation applications, permitting accurate dead-reckoning algorithms to keep a position of a automobile updated even when GPS signals are blocked by tunnels, high buildings, or parking garages. It is also targeting telematics applications.
— R. Colin Johnson, Advanced Technology Editor, EE Times
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