LPS25H STMicroelectronics

LPS25H MEMS pressure sensor: 260-1260 hPa absolute digital output barometer Datasheet - production data Applications Altimeter and barometer for portable devices GPS applications Weather Station Equipment Sport Watches Description HCLGA-10L (2.5 x 2.5 x 1.0 mm) The LPS25H 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. Features The sensing element consists of a suspended 260 to 1260 hPa absolute pressure range membrane realized inside a single mono-silicon substrate. It is capable to detect the absolute High-resolution mode: 1 Pa RMS pressure and is manufactured with a dedicated Low power consumption: process developed by ST. Low resolution mode: 4 A The membrane is very small compared to the High resolution mode: 25 A traditionally built silicon micromachined High overpressure capability: 20x full scale membranes. Membrane breakage is prevented Embedded temperature compensation by an intrinsic mechanical stopper. Embedded 24-bit ADC The IC interface is manufactured using a standard CMOS process that allows a high level of Selectable ODR from 1 Hz to 25 Hz integration to design a dedicated circuit which is SPI and IC interfaces trimmed to better match the sensing element Embedded FIFO characteristics. Supply voltage: 1.7 to 3.6 V The LPS25H is available in a cavity holed LGA High shock survivability: 10,000 g package (HCLGA). It is guaranteed to operate over a temperature range extending from -30 C Small and thin package to +105 C. The package is holed to allow ECOPACK lead-free compliant external pressure to reach the sensing element. Table 1. Device summary Order codes Temperature range C Package Packing LPS25HTR Tape and reel HCLGA-10L -30 to +105 HCLGA-10L LPS25H Tray January 2014 DocID023722 Rev 3 1/46 This is information on a product in full production. www.st.comContents LPS25H Contents 1 Block diagram and pin description . 3 1.1 Pin description 3 2 Mechanical and electrical specifications 5 2.1 Mechanical characteristics . 5 2.2 Electrical characteristics . 6 2.3 Communication interface characteristics 7 2.3.1 SPI - serial peripheral interface 7 2.3.2 IC - inter IC control interface 8 2.4 Absolute maximum ratings . 9 3 Functionality 10 3.1 Sensing element 10 3.2 IC interface 10 3.3 Factory calibration 10 3.4 FIFO 11 3.4.1 Bypass mode (F MODE2:0=000 in FIFO CTRL (2Eh)) . 11 3.4.2 FIFO mode (F MODE2:0=001 in FIFO CTRL (2Eh)) . 11 3.4.3 Stream mode (F MODE2:0=010 in FIFO CTRL (2Eh)) . 11 3.4.4 FIFO mean mode (F MODE2:0=110 in FIFO CTRL (2Eh)) 11 4 Application hints . 12 4.1 Soldering information 12 5 Digital interfaces . 13 5.1 IC serial interface 13 5.2 IC serial interface (CS=High) . 13 5.2.1 IC operation . 14 5.3 SPI bus interface . 15 5.3.1 SPI read . 16 5.3.2 SPI write 17 5.3.3 SPI read in 3-wires mode . 18 2/46 DocID023722 Rev 3