Services multiple electronic applications and the top semiconductor company in the worldSemiconductor(STMicroelectronics, AbbreviationST; New York Stock Exchange code:STM) newly launched a road noise reduction (RNC) MEMS sensor.The new product uses Active Noise-Control (ANC) technology to reduce road noise, making the car more comfortable and quiet.In the past, engine performance, appearance design and gearbox were the three major definition elements of the car; now, drivers and passengers are increasingly paying attention to driving comfort.
Electric vehicles (EV) are less noise than fuel vehicles (ICE). This is the innate advantage of electric vehicles. Automotive manufacturers will focus on reducing the noise caused by wheels or vibrating in the car, create a quieter carriage environment, allow passengers to better better wayEnjoy the fun.
The noise anti -reduction algorithm combined with the sensor array installed by the vehicle, measures the environment sound, and uses noise to reduce the waveform and vibration noise (reduction) to achieve the purpose of eliminating vibration noise.
Simone Ferri, general manager of MEMS Sub -Department, Sims Subsidine, Semiconductor Simulation, MEMS and Sensor Products Department, said: In today's digital age, in order to ensure that the cabin is quieter, the road is more secure and pleasant, and the excess voice in the car is handled.It is to reduce noise rather than reducing noise.With the transformation of cars to hybrids and electricity, the impact of road noise on cars may have a lot of value. Our AIS25BA acceleration meter brings high value for system designers.
The development capabilities of the semiconductor semiconductor in Microelectronics system (MEMS) IC gives AIS25BA's excellent product characteristics and give the RNC system higher accuracy.The electrical noise of the sensor currently reaches the lowest level in the market, which can help auto engineers to achieve a quieter in -car environment.On the other hand, it has a fast response/low delay required for the RNC system in real time, and the high bandwidth required to capture interference in the entire sound range related to the application.The extensive working temperature range and mechanical resistance allows the sensor to place the worst place in today's vehicle environment: near the engine or drive motor, and the position near the wheel and suspension.
Technical supplement information
The AIS25BA 3 axis increasemeter of the Semiconductor Semiconductor is given priority to the accuracy of the RNC system when designing.The noise density is very low. Both the X and the Y axis are 30µg/√Hz, and the Z axis is 50µg/√Hz, which is 58%lower than the closest competitive product.
In addition to excellent noise performance, the frequency response expands to 2.4kHz, so it covers all spectrum related to noise reduction in the car.Similarly, the total delay of the sensor is 266 s, so that the system has enough time to generate noise reduction signal in real time.
In addition, the sensor has a time -sharing (TDM) digital interface, allowing the system to synchronize multiple acceleration meters to measure the vibration noise of the whole car.This audio -friendly interface can also be easily connected to other types of data bus widely used in the car.The measurement range of the full volume can be selected, the maximum range is ± 7.7g. Compared with the typical strong vibration of the car, this range provides sufficient margin.The power supply voltage range is 1.71V to 1.99V.
AIS25BA meet the AEC-Q100 standard, and currently uses a 14-pin 2.5mm x 2.5mm x 0.86mm LGA packaging.For the application sample, please contact the local Semiconductor Sales Representative Office.
