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是一個(gè)單軸或雙軸傳感元件和一個(gè)集成電路接口能夠通過SPI協(xié)議的主控制單元提供加速度信息中心加速度傳感器。

的傳感元件，能夠檢測(cè)的加速度，使用一個(gè)專門的過程開發(fā)的由圣生產(chǎn)的慣性傳感器和致動(dòng)器在硅中使用。

該IC接口使用BCD工藝，允許高層次的集成制造。該設(shè)備是工廠修剪，以更好地調(diào)整的特點(diǎn)，傳感元件的加速度信息提供。

ais1120sx / ais2120sx有一個(gè)全面的±120 g，采集鏈由一個(gè)C / V轉(zhuǎn)換器，全差分電荷放大器、一個(gè)第二階ΣΔ模數(shù)轉(zhuǎn)換器和數(shù)字核心，包括濾波、補(bǔ)償和插值、控制邏輯和SPI協(xié)議生成

傳感器的差動(dòng)電容與防爆質(zhì)量位移成正比，因此，通過對(duì)差動(dòng)電容的檢測(cè)，確定傳感器的位置。然后，由于質(zhì)量的位置是已知的，和位置相關(guān)的輸入加速度，可以很容易地推導(dǎo)出的輸入加速度。

該裝置可在一個(gè)塑料SOIC8封裝，保證工作在擴(kuò)展溫度范圍從- 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

主要特點(diǎn)

3.3伏單電源供電

14位數(shù)據(jù)輸出

120克全量表

慢速和快速抵消取消

嵌入式自測(cè)試

可選擇低通濾波器

SPI接口

汽車AEC-Q100認(rèn)證

?符合ECOPACK

擴(kuò)展溫度范圍為40°～±105°