SMA682

Satellite sensor for airbag systems

Application & Technical Summary

The SMA682 is a versatile high-g accelerometer for automotive passive safety systems and detects the deceleration of a vehicle. It is typically used in satellite sensors to sense front and side crashes.

The SMA682 communicates via a PSI5 v1.3. All sensor data is processed by the central airbag ECU, which recognizes a crash based on acceleration data and activates the respective airbags. The sensor is developed in accordance to ISO26262 for ASIL D system use.

Product benefits

Complies with VDA AK-LV 27 specification
Robustness against microcuts
Triggerable offset adjustment
RoHS compliant

Target application

Satellite sensors

reliable operation

due to broad operating temperature range

Technical Features


Type	Single axis high-g acceleration sensor
Package	SOIC8n
Sensing axes	Y
Range	±120/240/480 g
Interface	PSI5 (PAS)
Data resolution	10-bit
Sensitivity	4/2/1 LSB/g
Tolerance	±7%
Supply voltage	4.5 to 11 V
Supply current	< 6 mA (sink current 26 mA)
Operating temperature	-40°C to 125°C