LPS27HHTWTR datasheet(10/55 Pages) STMICROELECTRONICS

부품명	LPS27HHTWTR

상세설명	MEMS pressure sensor: 260-1260 hPa absolute digital output barometer with embedded temperature sensor in water-resistant package

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4.4

Device structure

The LPS27HHTW 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. LPS27HHTW internal structure

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

LPS27HHTW 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 8. 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

LPS27HHTW

Device structure

DS13489 - Rev 1

page 10/55

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