AIS2120SX中文资料Dual-axis hi-g accelerometer for airbags数据手册ST规格书

描述 Description

The AIS1120SX / AIS2120SX is a central acceleration sensor with a single or dual axis sensing element and an IC interface able to provide acceleration information to a master control unit via an SPI protocol.
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 BCD process that allows a high level of integration. The device is factory trimmed to better tune the characteristics of the sensing element with the acceleration information to be supplied.
The AIS1120SX / AIS2120SX has a full scale of ±120 g. The acquisition chain consists of a C/V converter, a full-differential charge amplifier, a 2nd order ΣΔ analog-to-digital converter and a digital core, which includes filtering, compensation and interpolation, control logic and SPI protocol generation.
The differential capacitance of the sensor is proportional to the proof mass displacement; thus, by sensing the differential capacitance, the position of the sensor is determined. Then, since the mass position is known, and the position is related to the input acceleration, the input acceleration can be easily deduced.
The device is available in a plastic SOIC8 package and is guaranteed to operate over a temperature range extending from -40 °C to +105 °C.

特性 Features

• AEC-Q100 qualified
• 3.3 V single supply operation
• 14-bit data output
• ±120 g full scale
• Slow and fast offset cancellation
• Embedded self-test
• Selectable low-pass filter
• SPI interface
• ECOPACK® compliant
• Extended temperature range -40 °C to +105 °C

简介

AIS2120SX属于传感器变送器的运动传感器-加速计。由制造生产的AIS2120SX运动传感器 - 加速计加速度计用于检测并响应运动或振动等加速度的变化。加速度计类型有 X、Y 或 Z 轴上的模拟或数字加速度计，加速度范围为 ±0.5 g 至 ±2000 g，灵敏度为 1 至 500 k (LSB/g)，输出类型有模拟电压、蓝牙、数字、DSI、IEPE、I2C、PCM、PWM、射频和 SPI。