e-lis2l02as4tr STMicroelectronics, e-lis2l02as4tr Datasheet

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e-lis2l02as4tr

Manufacturer Part Number
e-lis2l02as4tr
Description
Mems Inertial Sensor 2-axis - ??2g/??6g Linear Accelerometer
Manufacturer
STMicroelectronics
Datasheet
1
2
The LIS2L02AS4 is a low-power two axes linear
accelerometer that includes a sensing element
and an IC interface able to take the information
from the sensing element and to provide an analog
signal to the external world.
The sensing element, capable of detecting the ac-
celeration, is manufactured using a dedicated pro-
cess developed by ST to produce inertial sensors
and actuators in silicon.
The IC interface is manufactured using a standard
CMOS process that allows high level of integration
to design a dedicated circuit which is trimmed to
better match the sensing element characteristics.
The LIS2L02AS4 has a user selectable full scale
Figure 2. Block Diagram
December 2005
2.4V TO 5.25V SINGLE SUPPLY OPERATION
LOW POWER CONSUMPTION
±2g/±6g USER SELECTABLE FULL-SCALE
0.3mg RESOLUTION OVER 100Hz
BANDWIDTH
EMBEDDED SELF TEST AND POWER DOWN
OUTPUT VOLTAGE, OFFSET AND
SENSITIVITY RATIOMETRIC TO THE
SUPPLY VOLTAGE
HIGH SHOCK SURVIVABILITY
LEAD FREE AND ECOPACK COMPATIBLE
a
Features
Description
SELF TEST
X+
Y+
X-
Y-
2-Axis - ±2g/±6g LINEAR ACCELEROMETER
REFERENCE
MUX
AMPLIFIER
CHARGE
TRIMMING CIRCUIT
of ±2g, ±6g and it is capable of measuring acceler-
ations over a bandwidth of 1.5kHz for all axes. The
device bandwidth may be reduced by using exter-
nal capacitances. A self-test capability allows to
check the mechanical and electrical signal path of
the sensor.
The LIS2L02AS4 is available in plastic SMD pack-
age and it is specified over an extended tempera-
ture range of -40°C to +85°C.
The LIS2L02AS4 belongs to a family of products
suitable for a variety of applications:
Figure 1. Package
Table 1. Order Codes
E-LIS2L02AS4TR
– Mobile terminals
– Gaming and Virtual Reality input devices
– Free-fall detection for data protection
– Antitheft systems and Inertial Navigation
– Appliance and Robotics
E-LIS2L02AS4
Part Number
MEMS INERTIAL SENSOR:
DEMUX
Package
SO24
SO24
SO-24
S/H
S/H
LIS2L02AS4
CLOCK
Routx
Routy
Tape & Reel
Finishing
Tube
Vouty
Voutx
Rev. 2
1/14

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e-lis2l02as4tr Summary of contents

Page 1

... SELF TEST December 2005 2-Axis - ±2g/±6g LINEAR ACCELEROMETER Figure 1. Package Table 1. Order Codes E-LIS2L02AS4TR of ±2g, ±6g and it is capable of measuring acceler- ations over a bandwidth of 1.5kHz for all axes. The device bandwidth may be reduced by using exter- nal capacitances. A self-test capability allows to check the mechanical and electrical signal path of the sensor ...

Page 2

... Voutx Output Voltage 11 PD Power Down (Logic 0: normal mode; Logic 1: Power-Down mode Internally not connected 13 FS Full Scale selection (Logic 0: 2g Full-scale; Logic 1: 6g Full-scale) 14-15 Reserved Leave unconnected or connect to Vdd 16 Reserved Connect to Vdd or ground 17 Reserved Leave unconnected or connect to Vdd 18 Reserved ...

Page 3

... Top Operating Temperature Range Wh Product Weight Notes: 1. The product is factory calibrated at 3.3V. The device can be powered from 2.4V to 5.25V. Voff, So and Vt parameters will vary with supply voltage. 2. Typical specifications are not guaranteed 3. Verified by wafer level test and measurement of initial offset and sensitivity 4. Zero-g level and sensitivity are essentially ratiometric to supply voltage 5 ...

Page 4

... Absolute Maximum Rating Stresses above those listed as “absolute maximum ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device under these conditions is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability. ...

Page 5

... The Self Test function is off when the ST pin is connected to GND. When the ST pin is tied at Vdd an actuation force is applied to the sensor, simulating a definite input acceleration. In this case the sensor outputs will exhibit a voltage change in their DC levels which is related to the selected full scale and depending on the Supply Voltage through the device sensitivity ...

Page 6

... This imbalance is measured using charge integration in re- sponse to a voltage pulse applied to the sense capacitor. At steady state the nominal value of the capacitors are few pF and when an acceleration is applied the maximum variation of the capacitive load 100fF. 4.2 IC Interface In order to increase robustness and immunity against external disturbances the complete signal process- ing chain uses a fully differential structure ...

Page 7

... Taking in account that the internal filtering resistor (R for the external filter cut-off frequency may be simplified as follows: The tolerance of the internal resistor can vary typically of ±20% within its nominal value of 110kΩ; thus the cut-off frequency will vary accordingly. A minimum capacitance of 320 pF for C case ...

Page 8

... Table 6. Filter Capacitor Selection 100 Hz 200 Hz 500 Hz 5.1 Soldering information The SO24 package is lead free qualified for soldering heat resistance according to JEDEC J-STD-020C. 5.2 Output response vs orientation Figure 5. Output response vs orientation X=1.65V (0g) Y=2.31V (+1g) Figure 5 refers to LIS2L02AS4 device powered at 3.3V 8/14 (x,y,z). Capacitance Value Choose. ...

Page 9

... Typical performance Characteristics 6.1 Mechanical Characteristics at 25°C Figure 6. X axis Zero g Level at 3. 1.55 1.6 1.65 Zerog Level (V) Figure 7. Y axis Zero g Level at 3. 1.55 1.6 1.65 Zerog Level (V) Figure 8. X axis Sensitivity at 3. 0.62 0.63 1.7 1.75 Figure 9. Y axis Sensitivity at 3.3V ...

Page 10

... LIS2L02AS4 6.2 Mechanical Characteristics derived from measurement in the -40°C to +85°C temperature range Figure 10. X axis Zero g Level Change Vs. Temperature 1.5 1 0.5 0 Zerog level change (mg/deg. C) Figure 11. Y axis Zero g Level Change Vs. Temperature 1 level change (mg/deg ...

Page 11

... Electrical Characteristics at 25°C Figure 14. Noise density at 3. Noise density (ug/sqrt(Hz)) Figure 15. Current consumption at 3. 0.4 0.6 0.8 current consumption (mA) Figure 16. Current consumption in power down mode 1.2 1.4 LIS2L02AS4 1.3 1.4 1.5 1.6 1.7 current consumption (uA) 1.8 11/14 ...

Page 12

... In order to meet environmental requirements, ST offers these devices in ECOPACK packages have a Lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ...

Page 13

... Revision History Table 7. Revision History Date Revision February 2004 1-Dec-2005 1 First issue 2 Changed from Product preview to Datasheet maturity. Added Typical performance Characteristics section. LIS2L02AS4 Description of Changes 13/14 ...

Page 14

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