SMA864 | Satellite sensor for airbag systems

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 SMA864 is a triaxial-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	Triaxial-channel, high-g acceleration sensor
Package	DFN (3 x 3 mm²)
Sensing axes	X, Y, Z
Range	±64 g (X, Y) / ±32 g (Z)
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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SMA864 | Central sensor for airbag control units