MEMS sensors for automotive applications

Transcription

1 MEMS sensors for automotive applications

2 ST s automotive solutions APPLICATIONS Navigation assistance Telematics boxes Infotainment Roll detection STMicroelectronics is one of the leading automotive electronics suppliers, with tens of years of expertise in manufacturing and testing of ICs designed to perform under the most stringent automotive environmental conditions. We are committed to making cars safer and more comfortable, to improve the life of millions of people every day. Airbags-peripherals ST has shipped more than 9 billion MEMS sensors to customers and has a unique sensor portfolio, from discrete to fully-integrated solutions. Dedicated 8-inch wafer production lines with high-volume manufacturing and full in-house dual sourcing guarantee fast time-to-market, cost-effectiveness and 100% security of supply. Engine control MEMS sensors are acquiring a key role in automotive infotainment and safety applications. According to IHS*, the market for automotive MEMS devices increased 13% last year, indicating sensor penetration rates that continue to grow faster than the growth of passenger vehicles. 2 Higher accuracy, self-test capabilities and the need for rapid data transmission are fueling the trend towards more intelligent sensors. ST s sensors meet these requirements, featuring high resolution, embedded self-test, small size and smart power management to reduce energy consumption. *Source: IHS Market Tracker Automotive MEMS H Anti-theft systems Electronic stability control Airbags-peripherals 3 ST S MARKET-PROVEN MANUFACTURING TECHNOLOGY PARTNERSHIP WITH OEMS IN PRODUCT DEVELOPMENT Airbags-peripherals Electronic stability control Airbags-central unit EXPERTISE IN MULTI-AXIS SENSOR INTEGRATION HIGH-VOLUME MANUFACTURING CAPABILITY NON-SAFETY PASSIVE SAFETY IN DEVELOPMENT

3 Automotive MEMS sensors Non-safety applications ST offers a portfolio of MEMS automotive sensors qualified according to AEC-Q100. Our automotive sensor portfolio includes digital accelerometers with low- and high-g, full scale, digital 3-axis gyroscopes, and 6-axis system-in-packages (3D digital accelerometer + 3D digital gyroscope). Low-g 3-axis accelerometers have advanced power-saving features and an extended temperature range that make them the ideal choice for non-critical automotive applications including telematics, navigation, infotainment and security. Our high-g acceleration sensors feature an extended temperature range and are suitable for airbag applications in vehicle safety restraint systems. Our 3-axis gyroscopes offer superior stability over time and temperature, and guarantee the level of accuracy required by the most advanced navigation systems embedding dead reckoning. Our angular rate sensors for navigation are based on a single sensing structure for motion measurement along all three orthogonal axes, while other solutions on the market rely on two or three independent structures. Our solution eliminates any interference between the axes that inherently degrades the output signal. The result is increased accuracy and reliability of motion-controlled functionalities. 4 inemo 6-axis system-in-packages integrate accelerometer and gyroscope in a single device, with benefits in terms of accuracy, space and cost optimization. Multi-axis gyroscopes and accelerometers are used for assisted navigation and empower sophisticated dead reckoning software algorithms that calculate current position from a previously determined location updated by time, acceleration, and change of direction. 5 ST products are developed together with OEMs to the highest possible requirements. Other than sensors already available in the market, ST works with the leading car manufacturers on new sensing solutions for automotive applications. NON-SAFETY PASSIVE SAFETY Navigation assistance Anti-theft systems Telematics boxes Infotainment AIRBAGS: peripheral and on-board accelerometers AIS328DQ ULTRA-LOW-POWER 3-AXIS ACCELEROMETER The AIS328DQ 3-axis linear accelerometer features ultra-low-power operational modes that allow advanced power-saving and smart sleep-to-wakeup functions. It has dynamic user-selectable full-scales of ±2g/±4g/±8g and is capable of measuring accelerations with output data rates from 0.5 Hz to 1 khz. The self-test capability lets the user check the functioning of the sensor in the final application. Available in a small QFPN package with a 4x4 mm footprint, the AIS328DQ is guaranteed to operate over a temperature range from -40 C to +105 C. AIS328DQ accelerometer A3G4250D Gyro AIS3624DQ accelerometer ASM330LXH* 6-axis Combo AIS1200PS accelerometer AIS2120SX* accelerometer *Development Low power consumption 3-axis Battery saving (ignition off) For accurate tilt measurement

4 A3G4250D 3-AXIS DIGITAL GYROSCOPE The A3G4250D is a low-power 3-axis angular rate sensor able to provide unprecedented stability at zero rate level and sensitivity over temperature and time. It offers ±245 dps full scale and is capable of measuring rates with a user-selectable bandwidth. Available in a plastic land grid array (LGA) package, it can operate within a temperature range of -40 C +85 C. 3-axis 16-bit data output Single device for multiple application (Pitch, Roll, Yaw) Suitable for high resolution applications AIS3624DQ 3-AXIS MEDIUM-G ACCELEROMETER The AIS3624DQ offers the same features of AIS328DQ, including smart power management and small footprint, while offering a more extended full scale range of ±6g/±12g/±24g. The product addresses a variety of automotive non-safety applications such as ecall systems, telematics boxes, impact recognition and logging systems. 6 7 Medium-g detection Accurate crash recording AIS3624DQ is ideal for applications such as ecall systems. Pin-to-pin compatible with AIS328DQ Scalable solution ASM330LXH inemo INERTIAL MODULE (3D ACCELEROMETER AND 3D GYROSCOPE) The ASM330LXH is a system-in-package featuring both a 3D digital accelerometer and a 3D digital gyroscope. It has a user-selectable full scale acceleration range of ±2/±4/±8/±16 g and an angular rate range of ±125/±245/±500/±1000/±2000 dps. The ASM330LXH has two operating modes enabling the accelerometer and gyroscope sensors to be either activated at the same ODR or the accelerometer can be enabled while the gyroscope is powered down. Single-chip solution 6-axis Smallest footprint Synchronized output Low power consumption Cost-effective Independent on tilt installation Compact system design Precise motion reconstruction (by algorithm) Battery saving (ignition off)

5 TESEO-DRAW - SENSOR-ASSISTED NAVIGATION ST provides a fully configurable solution for dead reckoning built with Teseo receivers and sensors, to support different applications. TESEO-DRAW (Dead Reckoning Automotive Way) optimally merges the contribution from GNSS and sensors: Updates car position/velocity when GNSS satellites signal is not available (tunnels, obscured areas) Improves car position/velocity when GNSS satellites signals are marginal (urban canyons, partially obscured areas) Passive safety applications Open sky Tunnel Multi-layer parking Urban canyon Multi-layer street Good GNSS No GNSS Poor GNSS Teseo DRAW GNSS Calibration GNSS GNSS Position, velocity Position, velocity Position, velocity 8 The Teseo platform is a high-sensitivity, standalone GPS solution compatible with multiple satellite navigation systems, including the Chinese BeiDou, US GPS, European Galileo, Russian GLONASS and Japanese QZSS. 9 ST S DEAD RECKONING ARCHITECTURE STMicroelectronics has a deep expertise in sensor integration and new application development and can assist customers in their design-in process. ST s evaluation kits and firmware allows a real-time evaluation of sensors performance in customer s applications. Passive safety includes all applications that protect car occupants during a crash and feature post-crash effects mitigation. The airbag control unit (ACU) detects and evaluates a crash, before triggering the appropriate restraint system according to the type of collision and its severity. Information is supplied to the control unit by several satellite acceleration sensors (to evaluate and compare each of their signals). GNSS HW DR CONFIG height (h) AIS1200PS MEMS SATELLITE ACCELEROMETER SENSOR, SINGLE AXIS WITH PSI5 POINT-TO-POINT INTERFACE The AIS1200PS is a peripheral acceleration sensor with a single-axis sensing element and an IC interface able to provide acceleration information to a master control unit through a Manchester-coded protocol (125 Kbit/s). The AIS1200PS has a full scale of ±200 g. CLASSIC FREEMOUNT - 3AX GYRO + ODO + ACCELEROMETER CLASSIC - 1AX GYRO + ODO CAN BASED - STABILITY GYRO + ODO - DWP FRONT OR REAR The device is available in a plastic SOIC package with 150 mils reverse frame forming for EMC enhancement and is specified for a temperature range extending from -40 to +125 C. Sensor data DR SENSORS 200 g full scale Wide signal amplitude detection CAN BUS (ABS, SPEED, ESP GYRO) ACCELEROMETER [3AX] GYRO [1 or 3 AX] ANALOG ODOMETER TEMPERATURE SENSOR Temperature range up to 125 C Only two external components required Ideal for harsh environment Cost-effective

6 AISx120SX SINGLE OR DUAL AXIS CENTRAL ACCELEROMETER The AIS1120SX / AIS2120SX is a central acceleration sensor with a single- or dual-axis sensing element and an IC interface able to provide the acceleration information to an airbag master control unit via the SPI protocol. The AIS1120SX / AIS2120SX has a full scale of ±120 g. Available in a plastic SOIC8 package, it is specified for an extended temperature range from -40 C to +105 C. Design support With an extensive expertise in sensor integration and the development of new applications, ST can assist customers in their design-in phase. ST s evaluation kits and firmware allows a real-time evaluation of sensor performance in customer applications. Single- or dual-axis Embedded offset cancellation Bandwidth up to 1600 Hz Design flexibility/scalability Stability over time Fast signal response Adapter USB connector STM32 microcontroller PRODUCTS UNDER DEVELOPMENT ST is developing and qualifying new sensors addressing various automotive applications, with the goal to improve car performance, safety, and comfort: STEVAL-MKI109V2 Barometric pressure sensors (starting from 2017) for non-safety applications, such as engine control, mass air flow, seat comfort, and car navigation JTAG/SWD 10 Test points 11 ST offers a complete evaluation solution including: Inertial measurement units (starting from 2018) for active safety applications, such as electronic stability control, roll over stability, hill-start assist, and electronic parking brake A full set of DIL24 MEMS non-safety sensor adapters supporting fast prototyping emotion motherboard compatible with all adapters and based on an STM32 microcontroller UNICO graphic user interface for direct and real-time access to the sensor outputs and configuration registers. Board Description Order code Motherboard ST MEMS motherboard is based on the high-performance STM32F bit ARM Cortex -M3 MCU Interfaces: USB connector and JTAG/SWD for debugging DFU-compatible for USB microprocessor firmware updates Compatible with all ST MEMS adapters STEVAL-MKI109V2 Adapter board AIS328DQ STEVAL-MKI110V1 Adapter board AIS3624DQ STEVAL-MKI158V1 Adapter board A3G4250D STEVAL-MKI125V1 Adapter board ASM330LXH STEVAL-MKI171V1* Note: *available starting from H2 2015

7 Technical documents To see all technical documents and files for a specific product, go to and select the product you are interested in through our product catalog. Each part number has a corresponding web page where you can easily find all associated technical documents and resources. Developer links For more information about MEMS sensors for automotive applications: For more information about MEMS evaluation boards: To take part to our forums: Online support For technical support or questions about product availability, pricing, where-to-buy, or other related issues, go to STMicroelectronics - May Printed in United Kingdom - All rights reserved The STMicroelectronics corporate logo is a registered trademark of the STMicroelectronics group of companies All other names are the property of their respective owners Order code: BRMEMSAUTO0515 For more information on ST products and solutions, visit