PDF《LPS001D》

Preliminary data This is preliminary information on a new product now in development or undergoing evaluation.

Details are subject to change without notice. August

2010 Doc ID

17726 Rev

1 1/32

32 LPS001D MEMS pressure sensor:

300 -

1100 mbar absolute digital output barometer Features Piezoresistive pressure sensor Very low power consumption

300 -1100 mbar absolute pressure range 0.1 mbar resolution Embedded offset and span temperature compensation Embedded 16-bit ADC SPI and I2 C interfaces Supply voltage: 2.2 V to 3.6 V 1.8 V compatible IOs High shock survivability (10000 g) Small, thin package ECOPACK? lead-free compliant Applications Altimeter and barometer for portable devices GPS applications Weather station equipment Sport watches Description The LPS001D is an ultra-compact absolute piezoresistive pressure sensor. It includes a monolithic sensing element and an IC interface capable of taking information from the sensing element and providing a digital signal to external applications. The sensing element consists of a suspended membrane within a single monosilicon substrate, manufactured using a dedicated process developed by STMicroelectronics called VENSENS . The VENSENS process allows the construction of a monosilicon membrane above an air cavity with a controlled gap and defined pressure. The membrane is very small compared to traditional silicon micromachined membranes. Membrane breakage is prevented by intrinsic mechanical stoppers. The IC interface is manufactured using a standard CMOS process that allows a high level of integration, to design a dedicated circuit which is trimmed to better match the sensing element characteristics. The LPS001D is available in a small plastic land grid array (LGA) package, and 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. HLGA 5x5 16L Table 1. Device summary Order code Temperature range [°C] Package Packing LPS001DL -40 to +85 HLGA 5x5 16L Tray LPS001DLTR -40 to +85 HLGA 5x5 16L Tape and reel www.st.com Contents LPS001D 2/32 Doc ID

17726 Rev

1 Contents

1 Block diagram and pin information

6 2 Mechanical and electrical specifications

8 2.1 Mechanical characteristics

8 2.2 Electrical characteristics

9 3 Absolute maximum ratings

10 4 Functionality

11 4.1 Sensing element

11 4.2 IC interface

11 4.3 Factory calibration

12 5 Application hints

13 5.1 Soldering information

13 6 Digital interfaces

14 6.1 I2C serial interface

14 6.1.1 I2 C operation

15 6.2 SPI bus interface

16 6.2.1 SPI read

17 6.2.2 SPI write

18 6.2.3 SPI read in 3-wires mode

19 7 Register mapping

20 8 Register description

21 8.1 WHO_AM_I (0Fh)21 8.2 CTRL_REG1 (20h)21 8.3 CTRL_REG2 (21h)22 8.4 CTRL_REG3 [Interrupt CTRL register] (22h)23 8.5 STATUS_REG (27h)24 8.6 PRESS_OUT_L (28h)24 LPS001D Contents Doc ID

17726 Rev

1 3/32 8.7 PRESS_OUT_H (29h)25 8.8 TEMP_OUT_L (2Ah)25 8.9 TEMP_OUT_H (2Bh)25 8.10 DELTA_P_L (2Ch)26 8.11 DELTA_P_H (2Dh)26 8.12 REF_P_L (30h)26 8.13 REF_P_H (31h)27 8.14 THS_P_L (32h)27 8.15 THS_P_H (33h)27 8.16 INTERRUPT_CFG (34h)28 8.17 INT_SOURCE (35h)28 8.18 INT_ACK (36h)29

9 Package information

30 10 Revision history

31 List of tables LPS001D 4/32 Doc ID

17726 Rev

1 List of tables Table 1. Device summary

1 Table 2. Pin description

6 Table 3. Mechanical characteristics

8 Table 4. Electrical characteristics

9 Table 5. Absolute maximum ratings

10 Table 6. Serial interface pin description