智能手机 运动手表 登山手表等使用的ST压力传感器 LPS331AP

Features

■Piezoresistive pressure sensor；

■260-1260 mbar absolute pressure range

■Low power consumption

■Low noise (0.02 mbar RMS)

■25 cm resolution

■Embedded offset and span temperature

compensation

■SPI and I

2C interfaces

■Supply voltage 1.8 V to 3.6 V

■High overpressure capability: 20x Full scale

■High shock survivability (10000 g)

■Small and thin PACkage

■ECOPACK® Lead-free compliant

Applications

■Altimeter and barometer for portable devices

■GPS applications

■Weather station equipment

■Sport watches

Description

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 from 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

intrinsic mechanical stoppers.

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

characteristics.

LPS331AP is available in a small plastic land grid

array (HCLGA) package and it is guaranteed to

operate over a temperature range extending from

-20 °C to +105 °C. The package is holed to allow

external pressure to reach the sensing element.

The LPS331AP belongs to a family of products

suitable for a variety of applications.

HCLGA-16 3x3x1 mm HCLGA-16 3x3x1 mm

Table 1. Device summary