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PDF LIS331DL Data sheet ( Hoja de datos )

Número de pieza LIS331DL
Descripción MEMS motion sensor
Fabricantes STMicroelectronics 
Logotipo STMicroelectronics Logotipo



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LIS331DL
MEMS motion sensor
3-axis - ±2g/±8g smart digital output “nano” accelerometer
Features
2.16 V to 3.6 V supply voltage
1.8 V compatible IOs
<1 mW power consumption
±2g / ±8g dynamically selectable full-scale
I2C/SPI digital output interface
Programmable interrupt generator
Embedded click and double click recognition
Embedded free-fall and motion detection
Embedded high pass filter
Embedded self test
10000 g high shock survivability
ECOPACK® RoHS and “Green” compliant
(see Section 9)
Applications
Free-Fall detection
Motion activated functions
Gaming and virtual reality input devices
Vibration monitoring and compensation
Description
The LIS331DL, belonging to the “nano” family of
ST motion sensors, is the smallest consumer low-
power three axes linear accelerometer. The
device features digital I2C/SPI serial interface
standard output and smart embedded functions.
The sensing element, capable of detecting the
acceleration, is manufactured using a dedicated
LGA 16 (3x3x1 mm)
process developed by ST to produce inertial
sensors and actuators in silicon.
The IC interface is manufactured using a CMOS
process that allows to design a dedicated circuit
which is trimmed to better match the sensing
element characteristics.
The LIS331DL has dynamically user selectable
full scales of ±2g/±8g and it is capable of
measuring accelerations with an output data rate
of 100 Hz or 400 Hz.
A self-test capability allows the user to check the
functioning of the sensor in the final application.
The device may be configured to generate inertial
wake-up/free-fall interrupt signals when a
programmable acceleration threshold is crossed
at least in one of the three axes. Thresholds and
timing of interrupt generators are programmable
by the end user on the fly.
The LIS331DL is available in plastic Land Grid
Array package (LGA) and it is guaranteed to
operate over an extended temperature range from
-40 °C to +85 °C.
Table 1. Device summary
Order code
Temp range [°C]
LIS331DL
-40 to +85
LIS331DLTR
-40 to +85
Package
LGA
LGA
Packing
Tray
Tape and reel
April 2008
Rev 3
1/42
www.st.com
42

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LIS331DL pdf
LIS331DL
List of figures
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Figure 17.
Figure 18.
Figure 19.
Figure 20.
Figure 21.
Figure 22.
Figure 23.
Figure 24.
Figure 25.
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
SPI slave timing diagram (2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
I2C slave timing diagram (4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
LIS331DL electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Read & write protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
SPI read protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Multiple bytes SPI read protocol (2 bytes example) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
SPI write protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Multiple bytes SPI write protocol (2 bytes example) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
SPI read protocol in 3-wires mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
X axis Zero-g level at 2.5 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
X axis Sensitivity at 2.5 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Y axis Zero-g level at 2.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Y axis Sensitivity at 2.5 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Z axis Zero-g level at 2.5 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Z axis Sensitivity at 2.5 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
X axis Zero-g level change vs. temperature at 2.5 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
X axis Sensitivity change vs. temperature at 2.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Y axis Zero-g level change vs. temperature at 2.5 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Y axis Sensitivity change vs. temperature at 2.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Z axis Zero-g level change vs. temperature at 2.5 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Z axis Sensitivity change vs. temperature at 2.5 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Current consumption in normal mode at 2.5 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
LGA 16: Mechanical data and package dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
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LIS331DL arduino
LIS331DL
Mechanical and electrical specifications
2.2 Electrical characteristics
Table 4.
Symbol
Electrical characteristics @ Vdd=2.5 V, T= 25 °C unless otherwise noted(1)
Parameter
Test conditions
Min.
Typ.(2)
Max.
Vdd
Vdd_IO
Idd
IddPdn
VIH
VIL
VOH
VOL
ODR
BW
Ton
Top
Supply voltage
I/O pins supply voltage(3)
Supply current
ODR=100 Hz
Current consumption in
power-down mode
Digital high level input voltage
Digital low level input voltage
High level output voltage
Low level output voltage
Output data rate
System bandwidth(4)
Turn-on time(5)
DR=0
DR=1
Operating temperature range
2.16 2.5
3.6
1.71 Vdd+0.1
0.3 0.4
15
0.8*Vdd_IO
0.2*Vdd_IO
0.9*Vdd_IO
0.1*Vdd_IO
100
400
ODR/2
3/ODR
-40 +85
1. The product is factory calibrated at 2.5 V. The operational power supply range is from 2.16 V to 3.6 V.
2. Typical specification are not guaranteed
3. It is possible to remove Vdd maintaining Vdd_IO without blocking the communication busses, in this condition the
measurement chain is powered off.
4. Filter cut-off frequency
5. Time to obtain valid data after exiting Power-Down mode
Unit
V
V
mA
µA
V
V
V
V
Hz
Hz
s
°C
11/42

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