Automotive absolute pressure sensor helps reducing emissions

Automotive absolute pressure sensor helps reducing emissions
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Semiconductor Supplier Novosense Microelectronics (Shanghai, China) has launched an automotive-qualified integrated absolute pressure sensor which integrates the automotive-qualified absolute pressure MEMS die (NSP163x) and signal conditioning IC (ASIC).
By Christoph Hammerschmidt

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To realize full combustion and reduce emissions, the engine of automobile/motorcycle usually requires a temperature pressure sensor on the intake manifold (TMAP) to control the air-fuel ratio quickly and accurately, which can build a balance between power performance, fuel economy and emissions. The automotive absolute pressure sensor with response time in sub-millisecond is one of the key components in combustion engine system to realize closed loop control. There is also the same requirement in the gas-driven models to reduce emission with the pressure sensor near the gas injector.

The NSPASx series absolute pressure sensor adopts ASIC to calibrate and compensate the output of MEMS die, which can convert pressure signals from 10kPa to 400kPa into Vout with a customized output range from 0 to 5V. The internal MEMS die is based on the piezoresistive effect of high-sensitivity monocrystalline silicon and is designed with advanced silicon-silicon bonding CSOI MEMS micromachining technology which has been certified by IAFTF16949. The whole wafer has 100% passed AOI and CP test and also the AEC-Q103 qualification, total accuracy is less than ±1%FS during its life cycle.

The NSPASx series and MEMS wafer (NSP163x) are mainly used in intake manifold pressure detection of vehicle/motorcycle, purging line pressure detection of vehicle, vacuum boosting system (VBS) pressure detection of HEV/EV, thermal runaway pressure detection of battery pack, as well as the car seat airbag pressure detection.

Key features include high accuracy and linearity along with good stability without secondary calibration at low power consumption. The device offers automobile-level reliability and stability and is AEC-Q100 qualified.

www.novosns.com

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