LIS244AL データシートの表示（PDF） - STMicroelectronics

部品番号

コンポーネント説明

一致するリスト

LIS244AL

MEMS motion sensor: 2-axis - ±2g ultracompact linear accelerometer

STMicroelectronics 

LIS244AL

Mechanical and electrical specifications

2.3

Absolute maximum ratings

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.

Table 5. Absolute maximum ratings

Symbol

Ratings

Vdd Supply voltage

Vin Input voltage on any control pin (ST)

APOW Acceleration (any axis, powered, Vdd=3.0V)

AUNP Acceleration (any axis, not powered)

TSTG Storage temperature range

Maximum value

Unit

-0.3 to 6

V

-0.3 to Vdd +0.3

V

3000g for 0.5 ms

10000g for 0.1 ms

3000g for 0.5 ms

10000g for 0.1 ms

-40 to +125

°C

This is a Mechanical Shock sensitive device, improper handling can cause permanent

damages to the part

This is an ESD sensitive device, improper handling can cause permanent damages to the

part

2.4

Terminology

Sensitivity describes the gain of the sensor and can be determined by applying 1g

acceleration to it. As the sensor can measure DC accelerations this can be done easily by

pointing the axis of interest towards the center of the earth, note the output value, rotate the

sensor by 180 degrees (point to the sky) and note the output value again thus applying ±1g

acceleration to the sensor. Subtracting the larger output value from the smaller one and

dividing the result by 2 will give the actual sensitivity of the sensor. This value changes very

little over temperature (see sensitivity change vs. temperature) and also very little over time.

The sensitivity tolerance describes the range of sensitivities of a large population of sensors.

Zero-g level describes the actual output signal if there is no acceleration present. A sensor

in a steady state on a horizontal surface will measure 0g in X axis and 0g in Y axis. The

output is ideally for a 3.0V powered sensor Vdd/2 = 1500mV. A deviation from ideal 0-g level

(1500mV in this case) is called Zero-g offset. Offset of precise MEMS sensors is to some

extend a result of stress to the sensor and therefore the offset can slightly change after

mounting the sensor onto a printed circuit board or exposing it to extensive mechanical

stress. Offset changes little over temperature - see “Zero-g level change vs. temperature” -

the Zero-g level of an individual sensor is very stable over lifetime. The Zero-g level

tolerance describes the range of Zero-g levels of a population of sensors.

7/15

Share Link: