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LIS3L02AS4 の電気的特性と機能

LIS3L02AS4のメーカーはSTMicroelectronicsです、この部品の機能は「MEMS INERTIAL SENSOR / LINEAR ACCELEROMETER」です。


製品の詳細 ( Datasheet PDF )

部品番号 LIS3L02AS4
部品説明 MEMS INERTIAL SENSOR / LINEAR ACCELEROMETER
メーカ STMicroelectronics
ロゴ STMicroelectronics ロゴ 




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LIS3L02AS4 Datasheet, LIS3L02AS4 PDF,ピン配置, 機能
LIS3L02AS4
MEMS INERTIAL SENSOR:
3-Axis - ±2g/±6g LINEAR ACCELEROMETER
1 Features
2.4V TO 3.6V SINGLE SUPPLY OPERATION
LOW POWER CONSUMPTION
±2g/±6g USER SELECTABLE FULL-SCALE
0.5mg 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
Figure 1. Package
SO24
Table 1. Order Codes
Part Number
Package
E-LIS3L02AS4
SO24
E-LIS3L02AS4TR SO24
Finishing
Tube
Tape & Reel
2 Description
The LIS3L02AS4 is a low-power three axes linear ac-
celerometer 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 accel-
eration, is manufactured using a dedicated process
developed by ST to produce inertial sensors and ac-
tuators 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 LIS3L02AS4 has a user selectable full scale of
±2g, ±6g and it is capable of measuring accelerations
over a bandwidth of 1.5KHz for all axes. The device
bandwidth may be reduced by using external capac-
itances. A self-test capability allows to check the me-
chanical and electrical signal path of the sensor.
The LIS3L02AS4 is available in plastic SMD package
and it is specified over an extended temperature
range of -40°C to +85°C.
The LIS3L02AS4 belongs to a family of products suit-
able 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
Figure 2. Block Diagram
X+ Routx Voutx
CHARGE
S/H
Y+ AMPLIFIER
Z+
a MUX
Z-
Y-
X-
DEMUX
S/H
S/H
Routy Vouty
Routz Voutz
SELF TEST
REFERENCE
TRIMMING CIRCUIT
December 2005
CLOCK
Rev. 2
1/14

1 Page





LIS3L02AS4 pdf, ピン配列
LIS3L02AS4
Table 3. Mechanical Characteristics1
(Temperature range -40°C to +85°C). All the parameters are specified @ Vdd =3.3V, T=25°C unless oth-
erwise noted
Symbol
Parameter
Test Condition
Min.
Typ.2
Max.
Unit
Ar Acceleration Range3 FS pin connected to GND
FS pin connected to Vdd
±1.8
±5.4
±2.0
±6.0
g
g
So Sensitivity4
Full-scale = 2g
Full-scale = 6g
Vdd/5–10%
Vdd/15–10%
Vdd/5
Vdd/15
Vdd/5+10%
Vdd/15+10%
V/g
V/g
SoDr Sensitivity Change Vs Delta from +25°C
Temperature
±0.01
%/°C
Voff Zero-g Level4
T = 25°C
Vdd/2-10%
Vdd/2
Vdd/2+10%
V
OffDr Zero-g level Change Delta from +25°C
Vs Temperature
±1.1 mg/°C
NL Non Linearity5
Best fit straight line
Full-scale = 2g
X, Y axis
±0.3 ±1.5 % FS
Best fit straight line;
Full-scale = 2g
Z axis
±0.6 ±2 % FS
CrossAx Cross-Axis6
±2 ±4 %
An Acceleration Noise Vdd=3.3V;
Density
Full-scale = 2g
50 µg/ Hz
Vt Self test Output
T = 25°C
Voltage Change7,8,9 Vdd=3.3V
Full-scale = 2g
X axis
-20
-50
-100
mV
T = 25°C
Vdd=3.3V
Full-scale = 2g
Y axis
20 50 100 mV
T = 25°C
Vdd=3.3V
Full-scale = 2g
Z axis
20 50 100 mV
Fres
Sensing Element
Resonance
Frequency10
all axes
1.5
KHz
Top Operating
Temperature Range
-40 +85 °C
Wh Product Weight
0.6 gram
Notes: 1. The product is factory calibrated at 3.3V. The device can be powered from 2.4V to 3.6V. 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. Guaranteed by design
6. Contribution to the measuring output of an inclination/acceleration along any perpendicular axis
7. “Self test output voltage change” is defined as Vout(Vst=Logic1)-Vout(Vst=Logic0)
8. “Self test output voltage change” varies cubically with supply voltage
9. When full-scale is set to ±6g, “self-test output voltage change” is one third of the specified value.
10.Minimum resonance frequency Fres=1.5KHz. Sensor bandwidth=1/(2*π*110K*Cload) with Cload>1nF.
3/14


3Pages


LIS3L02AS4 電子部品, 半導体
LIS3L02AS4
4 Functionality
The LIS3L02AS4 is a high performance, low-power, analog output three axes linear accelerometer packaged
in a SO24 package. The complete device includes a sensing element and an IC interface able to take the infor-
mation from the sensing element and to provide an analog signal to the external world.
4.1 Sensing element
A proprietary process is used to create a surface micro-machined accelerometer. The technology allows to carry
out suspended silicon structures which are attached to the substrate in a few points called anchors and are free
to move in the direction of the sensed acceleration. To be compatible with the traditional packaging techniques
a cap is placed on top of the sensing element to avoid blocking the moving parts during the moulding phase of
the plastic encapsulation.
When an acceleration is applied to the sensor the proof mass displaces from its nominal position, causing an
imbalance in the capacitive half-bridge. This imbalance is measured using charge integration in response 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 is up to 100fF.
4.2 IC Interface
In order to increase robustness and immunity against external disturbances the complete signal processing
chain uses a fully differential structure. The final stage converts the differential signal into a single-ended one to
be compatible with the external world.
The signals of the sensing element are multiplexed and fed into a low-noise capacitive charge amplifier that im-
plements a Correlated Double Sampling (CDS) at its output to cancel the offset and the 1/f noise. The output
signal is de-multiplexed and transferred to three different S&Hs, one for each channel and made available to
the outside.
The low noise input amplifier operates at 200 kHz while the three S&Hs operate at a sampling frequency of 66
kHz. This allows a large oversampling ratio, which leads to in-band noise reduction and to an accurate output
waveform.
All the analog parameters (zero-g level, sensitivity and self-test) are ratiometric to the supply voltage. Increasing
or decreasing the supply voltage, the sensitivity and the offset will increase or decrease almost linearly. The self
test voltage change varies cubically with the supply voltage
4.3 Factory calibration
The IC interface is factory calibrated for Sensitivity (So) and Zero-g Level (Voff). The trimming values are stored
inside the device by a non volatile structure. Any time the device is turned on, the trimming parameters are
downloaded into the registers to be employed during the normal operation. This allows the user to employ the
device without further calibration.
6/14

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共有リンク

Link :


部品番号部品説明メーカ
LIS3L02AS

INERTIAL SENSOR: 3Axis - 2g/6g LINEAR ACCELEROMETER

STMicroelectronics
STMicroelectronics
LIS3L02AS4

MEMS INERTIAL SENSOR / LINEAR ACCELEROMETER

STMicroelectronics
STMicroelectronics
LIS3L02AS4TR

MEMS INERTIAL SENSOR / LINEAR ACCELEROMETER

STMicroelectronics
STMicroelectronics
LIS3L02AS5

MEMS INERTIAL SENSOR

STMicroelectronics
STMicroelectronics


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