Munich, Germany Expanding the company's solution portfolio for automotive safety applications, Infineon Technologies AG has unveiled three new sensor products for tire pressure monitoring systems (TPMS), rollover sensing and anti-lock brake systems (ABS) at the recent Sensors Conference & Expo in Detroit, Mich.
Two of the new products are microelectromechanical systems (MEMS) devices based
on SensoNor's technology. Infineon acquired the tire pressure and acceleration sensor manufacturer in 2003. The new SP30 is a second-generation tire pressure-sensing device with three sensing functions, while the SAR-10 is an angular rate sensor/gyro for rollover sensing. Both devices integrate sensors and a custom chip in a compact package. The third new sensor is the TLE4941-1C, part of Infineon's third-generation Hall Effect sensor family, which has been optimized for ABS applications. This device provides information about the rotational speed to vehicle dynamics control and ABS systems.
The SP30 family for TPMS applications combines a silicon micromachined pressure and acceleration sensor, temperature sensor, and a battery voltage monitor in a small-foot-print package that occupies 104.5 mm². In production since 2003, the SP30 now offers several improvements including mask programmability for configuration with customer-specific software. This provides system designers with flexibility to use the product family across multiple systems and to achieve system cost savings, said the company. Infineon claims the SP30 is the only TPMS product in production that integrates an accelerometer sensor in a single package, which contributes to a reduced part count in TPMS modules. Samples are available.
The SP30 TPMS pressure sensor provides four-in-one sensing for pressure, acceleration, temperature and battery voltage.
The SAR-10 rollover sensor contains a silicon micromachined angular rate sensor that detects when a vehicle is beginning to roll over and enables the deployment of side airbags and the activation of seatbelt pretensioners. The SAR-10 package, which measures 120 mm², includes a custom chip that handles all analog signal processing and analog-to-digital conversion. This enables easy integration into modules as part of the overall vehicle safety system, said the company. The sensor is available in production volume with typical 12-week lead times.
The SAR10 angular rate sensor/gyro incorporates a MEMS sensing element and an on-board ASIC for full compensation and calibration with digital I/O.
The third-generation TLE4941-1C device combines a differential Hall Effect sensor and signal conditioning on a single chip. It offers enhanced electromechanical charge (EMC) and electrostatic discharge (ESD) protection, and is rated at up to 12 kV ESD. In addition, it includes an overmolded 1.8 nF capacitor for improved electromagnetic interference (EMI) performance.
The TLE4941-1C combines a differential Hall sensor with signal conditioning on a single chip.
The TLE4941-1C device's self-calibration capability acts at start-up and periodically during vehicle operation to adjust signal quality and to ensure high accuracy readings. This device doesn't require external components and features a fast power-up time and a low cut-off frequency. Supplied internally by a 3-volt voltage regulator, the device includes an on-chip oscillator as the clock generator for the digital part of the circuit. Available in production volume, delivery is typically 12 weeks.
All three new products are qualified for automotive system applications. Samples and pricing are available through Infineon's distribution network.
Call (408) 501-6337