Datasheet > AIS2120SXTR

AIS2120SXTR

更新时间： 2024-12-01 01:16:15

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意法半导体 - STMICROELECTRONICS		/
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Embedded self-test

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AIS2120SXTR 数据手册

AIS1120SX

AIS2120SX

MEMS automotive acceleration sensor:

single/dual-axis with SPI interface

Datasheet - production data

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.

SOIC8

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.

Features

 AEC-Q100 qualified

 3.3 V single supply operation

 14-bit data output

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 2

order analog-to-digital converter and a digital

core, which includes filtering, compensation and

interpolation, control logic and SPI protocol

generation.



120 g full scale

 Slow and fast offset cancellation

 Embedded self-test

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

 Selectable low-pass filter

 SPI interface

 ECOPACK compliant

the mass position is known, and the position is

related to the input acceleration, the input

acceleration can be easily deduced.

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

Applications

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.

 Airbag systems

 Vibrations, impact monitoring

Table 1. Device summary

Sensitivity Operating temperature

Order code

g-range

Package

Packing

axes

range [C]

120 g

-40 to +105

SOIC8N

Tape and reel

AIS1120SXTR

AIS2120SXTR

January 2017

DocID028312 Rev 3

1/58

This is information on a product in full production.

www.st.com

12 3 4 5 6 7...58

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