SMI720 | Combined inertial sensor for rollover sensing in airbag ECUs

Safe and economical integrated sensor solution, applicable in systems up to ASIL C requirements

The SMI720 is a dual-axis (Ωx, az) combined inertial sensor (gyro and accelerometer), specifically designed for rollover applications.

Due to the combination of three chips in one housing, the SMI720 is able to measure data on the vehicle’s rotation around its roll axis (rollover gyro). In addition, it delivers data on vertical acceleration to determine the dynamic state of the vehicle and to check the plausibility of the rotation rate signal.

Benefits

Excellent vibration robustness and offset stability

Wide range of customized signal monitoring options

RoHS compliant

Target applications

Roll-over sensing

Technical Features


Type	Combined inertial sensor
Package	BGA64
Sensing axes	X (Ω), Z (a)
Range	±300 °/s (Ω) ±5 g (a)
Interface	SPI
Data resolution	16 bit
Sensitivity	100 LSB/°/s (Ω) 5,000 LSB/g (a)
Tolerance	±5% (Ω) ±6% (a)
Supply voltage	3.3 V
Supply current	< 21 mA
Operating temperature	-40°C to 105°C

Ball grid array package (BGA): 7 mm x 7 mm x 1.5 mm

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