LPS225HBTR STMicroelectronics

LPS225HB MEMS pressure sensor: 26 - 126 kPa absolute digital output barometer Datasheet - production data Applications Altimeters and barometers for portable devices GPS applications Weather station equipment Sport watches HLGA 8L 2.0 x 2.5 x 0.8 (max) mm Description The LPS225HB is an ultra-compact piezoresistive Features absolute pressure sensor. It includes a monolithic sensing element and an IC interface which 26 to 126 kPa absolute pressure range communicates a digital signal from the sensing High-resolution mode: 1 Pa RMS element to the application. Low-power mode: 3.5 Pa RMS The sensing element, which detects absolute pressure, consists of a suspended membrane Current consumption down to 4 A inside a single mono-silicon substrate and is High overpressure capability: 20x full scale manufactured using a dedicated process Embedded temperature compensation developed by ST. Embedded 24-bit ADC The membrane is very small compared to the ODR from 1 Hz to 75 Hz traditionally built silicon micromachined membranes. Membrane breakage is prevented SPI and IC interfaces by an intrinsic mechanical stopper. Embedded FIFO The IC interface is manufactured using a standard Interrupt functions: Data Ready, FIFO flags, CMOS process that allows a high level of pressure thresholds integration to design a dedicated circuit which is Supply voltage: 1.7 to 3.6 V trimmed to better match the characteristics of the sensing element. Small and thin package ECOPACK lead-free compliant The LPS225HB is available in a full-mold, holed LGA package (HLGA). It is guaranteed to operate over a temperature range extending from -40 C to +85 C. The package is holed to allow external pressure to reach the sensing element. Table 1. Device summary Order code Temperature range C Package Packing LPS225HBTR -40 to +85C HLGA-8L Tape and reel February 2017 DocID030115 Rev 2 1/47 This is information on a product in full production. www.st.comContents LPS225HB Contents 1 Block diagram and pin description . 6 2 Mechanical and electrical specifications 8 2.1 Mechanical characteristics . 8 2.2 Electrical characteristics . 9 2.3 Communication interface characteristics . 10 2.3.1 SPI - serial peripheral interface . 10 2 2.3.2 I C - inter-IC control interface 11 2.4 Absolute maximum ratings 12 3 Functionality 13 3.1 Sensing element 13 2 3.2 I C interface . 13 3.3 Factory calibration 13 4 FIFO . 14 4.1 Bypass mode 14 4.2 FIFO mode 15 4.3 Stream mode 16 4.4 Dynamic-Stream mode . 17 4.5 Stream-to-FIFO mode . 18 4.6 Bypass-to-Stream mode 19 4.7 Bypass-to-FIFO mode . 20 4.8 Retrieving data from FIFO 20 5 Application hints . 21 5.1 Soldering information 21 6 Digital interfaces . 22 2 6.1 I C serial interface 22 2 6.2 I C serial interface (CS = High) 22 2 6.2.1 I C operation . 23 6.3 SPI bus interface . 25 2/47 DocID030115 Rev 2