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.

ais1120sx / ais2120sx是一个单轴或双轴传感元件和一个集成电路接口能够通过SPI协议的主控制单元提供加速度信息中心加速度传感器。

的传感元件，能够检测的加速度，使用一个专门的过程开发的由圣生产的惯性传感器和致动器在硅中使用。

该IC接口使用BCD工艺，允许高层次的集成制造。该设备是工厂修剪，以更好地调整的特点，传感元件的加速度信息提供。

ais1120sx / ais2120sx有一个全面的±120 g，采集链由一个C / V转换器，全差分电荷放大器、一个第二阶ΣΔ模数转换器和数字核心，包括滤波、补偿和插值、控制逻辑和SPI协议生成

传感器的差动电容与防爆质量位移成正比，因此，通过对差动电容的检测，确定传感器的位置。然后，由于质量的位置是已知的，和位置相关的输入加速度，可以很容易地推导出的输入加速度。

该装置可在一个塑料SOIC8封装，保证工作在扩展温度范围从- 40°C + 105°C.

Key Features

• 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

• Automotive AEC-Q100 qualified

• ECOPACK^®compliant

• Extended temperature range -40 °C to +105 °C

主要特点

3.3伏单电源供电

14位数据输出

120克全量表

慢速和快速抵消取消

嵌入式自测试

可选择低通滤波器

SPI接口

汽车AEC-Q100认证

®符合ECOPACK

扩展温度范围为40°～±105°