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

簡(jiǎn)介

AIS1120SX屬于傳感器變送器的運(yùn)動(dòng)傳感器-加速計(jì)。由制造生產(chǎn)的AIS1120SX運(yùn)動(dòng)傳感器 - 加速計(jì)加速度計(jì)用于檢測(cè)并響應(yīng)運(yùn)動(dòng)或振動(dòng)等加速度的變化。加速度計(jì)類型有 X、Y 或 Z 軸上的模擬或數(shù)字加速度計(jì)，加速度范圍為 ±0.5 g 至 ±2000 g，靈敏度為 1 至 500 k (LSB/g)，輸出類型有模擬電壓、藍(lán)牙、數(shù)字、DSI、IEPE、I2C、PCM、PWM、射頻和 SPI。