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SMA861 | Central sensor for airbag control units

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SMA861

Vast field experience gained from hundreds of millions sensors

SMA8xy is a family of versatile 1-,2- and 3-channel high-g accelerometers for automotive passive safety systems.

The family member SMA861 is a dual-channel, high-g accelerometer with SPI interface. The sensor is intended for airbag systems, providing front or side crash information.

Power and digital communication are handled via the same 2-wire connection.

Benefits

Complies with AK-LV 27 specification

Robustness against microcuts

Developed for systems with requirements up to ASIL D

Target applications

Central sensor in airbag ECUs

Technical Features
Type
Dual axis high-g acceleration sensor
Package
DFN (3 x 3 mm²)
Sensing axes
X, Y
Range
±64 g (X, Y)
Interface
SafeSPI
Data resolution
14 bit
Sensitivity
64 LSB/g
Tolerance
±5 % (ax, ay)
Supply voltage
3.3, 5 or 6.7 V
Supply current
< 5 mA
Operating temperature
-40°C to 125°C

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