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STMicroelectronics Electronic Components Datasheet

LPS33HW Datasheet

MEMS pressure sensor

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LPS33HW
MEMS pressure sensor: 260-1260 hPa absolute
digital output barometer with water-resistant package
Datasheet - production data
Applications
Wearable devices
Altimeters and barometers for portable devices
GPS applications
Weather station equipment
Features
Pressure sensor with water-resistant package
260 to 1260 hPa absolute pressure range
Current consumption down to 3 μA
High overpressure capability: 20x full scale
Embedded temperature compensation
24-bit pressure data output
16-bit temperature data output
ODR from 1 Hz to 75 Hz
SPI and I²C interfaces
Embedded FIFO
Interrupt functions: data-ready, FIFO flags,
pressure thresholds
Supply voltage: 1.7 to 3.6 V
ECOPACK® lead-free compliant
Description
The LPS33HW is an ultra-compact piezoresistive
pressure sensor which functions as a digital
output barometer. The device comprises a
sensing element and an IC interface which
communicates through I2C or SPI from the
sensing element to the application.
The sensing element, which detects absolute
pressure, consists of a suspended membrane
manufactured using a dedicated process
developed by ST.
The LPS33HW is available in a ceramic LGA
package with metal lid. 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. Gel inside
the IC protects the electrical components from
water.
Order codes
LPS33HWTR
LPS33HW
Table 1. Device summary
Temperature range [°C]
Package
-40 to +85°C
CCLGA-10L
Packing
Tape and reel
Tray
July 2017
This is information on a product in full production.
DocID030522 Rev 1
1/50
www.st.com


STMicroelectronics Electronic Components Datasheet

LPS33HW Datasheet

MEMS pressure sensor

No Preview Available !

Contents
Contents
LPS33HW
1 Block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2 Mechanical and electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1 Mechanical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.3 Communication interface characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.3.1
2.3.2
SPI - serial peripheral interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
I2C - inter-IC control interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.4 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3 Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.1 Sensing element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.2 IC interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.3 Factory calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.4 Interpreting pressure readings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4 FIFO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.1 Bypass mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.2 FIFO mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.3 Stream mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.4 Dynamic-Stream mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.5 Stream-to-FIFO mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.6 Bypass-to-Stream mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.7 Bypass-to-FIFO mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.8 Retrieving data from FIFO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5 Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1 Soldering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6 Digital interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.1 IC serial interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.2 I2C serial interface (CS = High) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.2.1 I2C operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
2/50 DocID030522 Rev 1


Part Number LPS33HW
Description MEMS pressure sensor
Maker STMicroelectronics
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