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PDF ( 数据手册 , 数据表 ) LIS302ALB

零件编号 LIS302ALB
描述 MEMS motion sensor 3-axis - +-2g analog output piccolo accelerometer
制造商 ST Microelectronics
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LIS302ALB 数据手册, 描述, 功能
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LIS302ALB
MEMS motion sensor
3-axis - ±2g analog output "piccolo" accelerometer
Features
3.0V to 3.6V supply voltage
~2mW power consumption
±2g full-scale
3 acceleration channels plus multiplexed
analog output
Ratiometric output voltage
Power down mode
Embedded self test
10000g high shock survivability
ECOPACK® RoHS and “Green” compliant
(see Section 6)
Description
The LIS302ALB is a miniaturized low-power
three-axis linear accelerometer. It includes a
sensing element and an IC interface 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 motion
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 device can be
operated from 2.16V to 3.6V.
LGA-14 (3x5x0.9mm)
The LIS302ALB has a full scale of ±2g and it is
capable of measuring accelerations over a
maximum bandwidth of 2.0kHz. The device
bandwidth may be reduced by using external
capacitances. A self-test capability allows the
user to check the functioning of the sensor in the
final application.
The device has three analog acceleration output
plus an embedded multiplexer that allows to
redirect the analog outputs onto a single pin for
operation with a single channel A/D converter.
The LIS302ALB is available in plastic Thin Land
Grid Array package (TLGA) and it is guaranteed
to operate over an extended temperature range
from -40°C to +85°C.
The LIS302ALB 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.
Order codes
Part number
LIS302ALB
LIS302ALBTR
Temperature range, °C
-40°C to +85°C
-40°C to +85°C
Package
LGA-14
LGA-14
Note:
Tape & reel parts are compliant to International Standard EIA-481.
Packing
Tray
Tape & reel
October 2006
Rev 1
1/17
www.st.com
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LIS302ALB pdf, 数据表
Mechanical and electrical specifications
LIS302ALB
over lifetime. The Zero-g level tolerance describes the range of Zero-g levels of a population
of sensors.
Self Test allows to check the sensor functionality without moving it. 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 2.5nF and the internal
resistor. Due to the 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 close to the resonance frequency of the sensor. In
general the smallest possible bandwidth for a particular application should be chosen to get
the best results.
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LIS302ALB equivalent, schematic
Revision history
7 Revision history
Table 7. Document revision history
Date
Revision
03-Oct-2006
1 Initial release.
Changes
LIS302ALB
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