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智能手机、平板电脑、飞控航模、电子导航、无线射频、监控安防、仪器仪表、工业工控、智能遥控、电玩等电子产品方面
智能手机、平板电脑、飞控航模、电子导航、无线射频、监控安防、仪器仪表、工业工控、智能遥控、电玩等电子产品方面
LPS331APTR压力传感器，采用超小型薄型封装(LGA 3x3mm)，利用创新型MEMS技术实现了分辨率极高的压力和高度测量。 该器件采用意法半导体&rsquo的VENSENS技术设计而成，让压力传感器能够利用单片式硅芯片构造而成，因此消除了晶圆-晶圆键合，并且还将可靠性提至了最高水平。 与传统的硅微机加工膜相比，膜非常小，并且能够通过内置式机械塞保护其免遭破坏。
测定高度时，噪声对系统精度有很大影响。 意法半导体已将传感器的噪声降至最低水平。 这样就能够检测出几厘米的高度差异。
意法半导体&rsquo的压力传感器旨在加强用于户内与户外导航的GPS以便精确测量高度，或者充当智能手机、平板电脑、运动手表、气象站和汽车与工业应用领域内的气压计。
LPS331AP
MEMS pressure sensor, 260-1260 mbar absolute digital output barometer
The LPS331AP is an ultra compact absolute piezoresistive pressure sensor. It includes a monolithic sensing element and an IC interface able to take the information the sensing element and to provide a digital signal to the external world.
The sensing element consists of a suspended membrane realized inside a single mono-silicon substrate. It is capable to detecting pressure and is manufactured using a dedicated process developed by ST, called VENSENS.
The VENSENS process allows to build a mono-silicon membrane above an air cavity with controlled gap and defined pressure. The membrane is very small compared to the traditionally built silicon micromachined membranes. Membrane breakage is prevented by an intrinsic mechanical stopper.
The IC interface is manufactured using a standard CMOS process that allows a high level of integration to design a dedicated circuit which is trimmed to better match the sensing element acteristics.
The LPS331AP is available in a small holed cap land grid array (HCLGA) package and it is guaranteed to operate over a temperature range extending -40 °C to +85 °C. The package is holed to allow external pressure to reach the sensing element.
Key Features
&bull260 to 1260 mbar absolute pressure range
&bullHigh-resolution mode: 0.020 mbar RMS
&bullLow power consumption:Low resolution mode: 5.5 &muAHigh resolution mode: 30 &muA
&bullHigh overpressure capability: 20x full scale
&bullEmbedded temperature compensation
&bullEmbedded 24-bit ADC
&bullSelectable ODR 1 Hz to 25 Hz
&bullSPI and I2C interfaces
&bullSupply voltage: 1.71 to 3.6 V
&bullHigh shock survivability: 10,000 g
&bullSmall and thin package
&bullECOPACK® lead-free compliant