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
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Type
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Single axis high-g acceleration sensor
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Package
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SOIC8n
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Sensing axes
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Y
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Range
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±120/240/480 g
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Interface
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PSI5 (PAS)
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Data resolution
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10-bit
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Sensitivity
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4/2/1 LSB/g
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Tolerance
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±7%
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Supply voltage
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4.5 to 11 V
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Supply current
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< 6 mA (sink current 26 mA)
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Operating temperature
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-40°C to 125°C
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-
Lead-free SOIC8n package: 6.0 mm × 4.9 mm × 1.75 mm (complete sensor)
