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PDF ( 数据手册 , 数据表 ) 3L02AL

零件编号 3L02AL
描述 LIS3L02AL
制造商 STMicroelectronics
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3L02AL 数据手册, 描述, 功能
LIS3L02AL
MEMS INERTIAL SENSOR:
3-axis - +/-2g ultracompact linear accelerometer
Features
2.4V to 3.6V single supply operation
Low power consumption
±2g full-scale
0.5mg resolution over 100hz bandwidth
Embedded self test
Output voltage, offset and sensitivity
ratiometric to the supply voltage
High shock survivability
ECOPACK® Lead-free compliant
(see Section 6)
Description
The LIS3L02AL is a low-power 3-axis linear
capacitive 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
acceleration, is manufactured using a dedicated
process 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
Order codes
Part number
LIS3L02AL
LIS3L02ALTR
Temp range, °C
-40°C to +85°C
-40°C to +85°C
LGA-8
to design a dedicated circuit which is trimmed to
better match the sensing element characteristics.
The LIS3L02AL has a full scale of ±2g and it is
capable of measuring accelerations over a
bandwidth of 1.5 kHz for all axes. The device
bandwidth may be reduced by using external
capacitances. A self-test capability allows to
check the mechanical and electrical signal path of
the sensor.
The LIS3L02AL is available in plastic SMD
package and it is guaranteed to operate over an
extended temperature range of -40°C to +85°C.
The LIS3L02AL belongs to a family of products
suitable for a variety of applications:
– Mobile terminals
– Gaming and Virtual Reality input devices
– Free-fall detection for data protection
– Antitheft systems and Inertial Navigation
– Appliance and Robotics.
Package
LGA-8
LGA-8
Packing
Tray
Tape & Reel
May 2006
www.DataSheet.in
Rev 2
1/17
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3L02AL pdf, 数据表
Mechanical and electrical specifications
LIS3L02AL
Self Test allows to test the mechanical and electric part of the sensor, allowing the seismic
mass to be moved by means of an electrostatic test-force. 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. When ST is activated, the
device output level is given by the algebraic sum of the signals produced by the acceleration
acting on the sensor and by the electrostatic test-force. If the output signals change within
the amplitude specified inside Table 2, than the sensor is working properly and the
parameters of the interface chip are within the defined specification.
Output impedance describes the resistor inside the output stage of each channel. This
resistor is part of a filter consisting of an external capacitor of at least 1nF and the internal
resistor. Due to the high resistor level only small, inexpensive external capacitors are
needed to generate low corner frequencies. When interfacing with an ADC it is important to
use high input impedance input circuitries to avoid measurement errors. Note that the
minimum load capacitance forms a corner frequency beyond the resonance frequency of
the sensor. For a flat frequency response a corner frequency well below the resonance
frequency is recommended. In general the smallest possible bandwidth for an particular
application should be chosen to get the best results.
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3L02AL equivalent, schematic
Revision history
7 Revision history
LIS3L02AL
Table 6. Document revision history
Date
Revision
Changes
28-Sep-2005
1 Initial release.
03-May-2006
2 Corrected typo errors. Applied new corporate template layout.
16/17
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