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参数资料
| 型号： | LISY300ALTR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 模拟信号调理 |
| 英文描述： | TEMPERATURE SENSOR, PBCC28 |
| 封装： | 7 X 7 MM, 1.50 MM HEIGHT, GREEN, PLASTIC, LGA-28 |
| 文件页数： | 12/13页 |
| 文件大小： | 171K |
| 代理商： | LISY300ALTR |
Mechanical and electrical specifications
LISY300AL
8/13
2.4
Terminology
2.4.1
Sensitivity
A yaw rate gyroscope is a Z-axis rate device that produces a positive-going output voltage
for counterclockwise rotation around the axis normal to the package top. Sensitivity
describes the gain of the sensor and can be determined by applying a defined angular
velocity to it. This value changes very little over temperature and also very little over time.
2.4.2
Zero-rate level
Zero-rate level describes the actual output signal if there is no angular rate present. For a
3.3 V powered sensor the absolute zero-rate output is ideally 1.65 V. Zero-rate level of
precise MEMS sensors is, to some extent, a result of stress to the sensor and therefore
zero-rate level can slightly change after mounting the sensor onto a printed circuit board or
after exposing it to extensive mechanical stress. This value changes very little over
temperature and also very little over time.
2.4.3
Self-test
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 to Vdd, an actuation force is
applied to the sensor, emulating a definite Coriolis force. In this case the sensor output will
exhibit a voltage change in its DC level which is also depending on the supply voltage. When
ST is active, the device output level is given by the algebraic sum of the signals produced by
the velocity acting on the sensor and by the electrostatic test-force. If the output signals
change within the amplitude specified in Table 3, then the mechanical element is working
properly and the parameters of the interface chip are within the defined specification.
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