Q: Why does MA1000A MEMS accelerometer is so hot selling product?
A: 1) MA1000A MEMS accelerometer is very mature MEMS accelerometer chip, which has been widely used in Seismic Monitor, Micro-vibration Monitoring, Engineering Geophysical Exploration, Inertial Navigation, Structure/Building Monitoring, Surface Wave Detection, and Platform Stability, etc., for many years, and now the sold qty can reach 20k per year
2) since we produce MA1000A in big qty, so MA1000A MEMS accelerometer can enjoy ultra-cost-effective, which assure that it can be widely used.
5) MA1000A MEMS accelerometer provides the most reliability, its quality has been proven by the leading companies in China.
Q: about MA1000A self-test, whether it is possible to do it in the frequency other than 19Hz?
A: for the self-test frequency is fixed in ASIC of MA1000A, so it cannot be changed, if still wanting to modify the self-test frequency, the only way is to modify the ASIC, but this cost is huge, not recommended.
Q: How accurate the self-test is in response to temperatures change. if the presumed peak to peak amplitude (0.28g) would change by changing temperature.?
A: the error will be around 2% in theoretically to temperature change.
Q: About temperature effect on bias and scale factor(sensitivity), whether these two items are compensable or not. Whether the numbers mentioned at data sheet can be used to compensate temperate effect on bias and sensitivity?
A: MA1002A is analog accelerometer, all its compensation is done through external MCU. In normal situation, you can do 2nd order and 3rd order, and after the compensation, the features may be better 5~10times
Q: About temperature effect on bias and scale factor(sensitivity), if those number mentioned for bias drift and sensitivity drift can be used for compensation, please complete them with their sign (+ or -)?
A: each chip’s bias drift and sensitivity data can be used to do the compensation, in normal situation, this needs you to do the calibration according to the whole system requirements. Cause the whole system may have other component ADC’s composite temperature drift.
Of course, for our chip, we will fully test them before leaving factory, but because the system errors, these data may not be able to adjust your system into the most optimized status.
Q: What does the MEMS accelerometer actually measure?
A: An accelerometer is an electromechanical device that measures acceleration forces. These forces may be static, like the constant force of gravity pulling at our feet, or they could be dynamic – caused by moving or vibrating the accelerometer. They developed MEMS (micro electromechanical systems) accelerometers.
Q: What is MEMS accelerometer?
A: MEMS stands for micro electro mechanical system and applies to any sensor manufactured using microelectronic fabrication techniques. These techniques create mechanical sensing structures of microscopic size, typically on silicon. When coupled with microelectronic circuits, MEMS sensors can be used to measure physical parameters such as acceleration. There are two types of MEMS accelerometers: variable capacitive and piezoresistive. Variable capacitive (VC) MEMS accelerometers are lower range, high sensitivity devices used for structural monitoring and constant acceleration measurements. Piezoresistive (PR) MEMS accelerometers are higher range, low sensitivity devices used in shock and blast applications.
Q: How does a MEMS accelerometer sensor work?
A: An accelerometer is an electromechanical device that measures both static (gravity) and dynamic (motion or vibration) accelerations. The development of MEMS technology has revolutionized the original accelerometer applications, making them smaller, lower power and more accurate. MEMS accelerometers today may be found not only in industrial and mobile applications, but also in safety critical aeronautical instruments, tactical guidance systems.
Most accelerometers are Micro-Electro-Mechanical Sensors (MEMS). The basic principle of operation behind the MEMS accelerometer is the displacement of a small proof mass etched into the silicon surface of the integrated circuit and suspended by small beams.
Q: How about the delivery time?
A: for our standard model, if we have them in stock, only need 2~3days to re-test before shipping, if it is out of stock, then need around 2 weeks to arrange the production and tests. For the ODM electronic product, if needing to modify the structure, it will need around 3~4 weeks to arrange the production and tests.
Q: How to arrange the payment?
A: about the payment, please pay to our company account, the beneficiary’s name: NANJING SKY MEMS TECHNOLOGY CO., LTD. And our email is only @skymems.com to contact with u formally. To notice this to avoid the loss.
