LPS27HHW datasheet(15/60 Pages) STMICROELECTRONICS

Numer części	LPS27HHW

Szczegółowy opis	MEMS pressure sensor: 260-1260 hPa absolute digital output barometer with water-resistant package

PDF	60 Pages

Scroll/Zoom	100%

Producent	STMICROELECTRONICS [STMicroelectronics]

Strona internetowa	http://www.st.com

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15 / 60 page

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LPS27HHW

Functionality

4.4

Device structure

The LPS27HHW has a unique cylindrical package solution with a full metal lid assembled on

ceramic substrate and this cylindrical package provides an easy assembly with O-rings in

the end user’s application.

Figure 6. LPS27HHW internal structure

This structure (Figure 6) is designed and verified to resist water pressure up to 10 ATM and

the potting gel in the LPS27HHW has been proven to protect electronic components from

long-term exposure to harsh environments such as water mixed with chlorine, bromine,

commercial washing detergent and fuels, solvents and chemicals. It also provides excellent

low-stress encapsulation performance for sensitive electronic components from severe

environmental conditions such as high temperature and humidity, refer to the properties of

the gel which are given in the following table.

Table 9. Potting gel properties

Properties

Potting gel

Permeability g/m2·24 hr

Hardness (penetration) based on ASTM D1403

Ultra-low Young's modulus

Less than 0.01 GPa

TCE (Thermal Coefficient of Expansion)

300 ppm/°C

LPS27HHW Arkusz danych(PDF) 15 Page - STMicroelectronics