DESCRIPTION

· The ADXL151 is a single-axis, g-range configurable satellite sensor compliant with the PSI5 V2.1 specification.

· It provides a low-cost solution for front and side impact airbag satellite sensor applications.

· The sensor transmits acceleration data via a digital 2-wire current loop interface bus.

· It supports full-scale acceleration measurements of ±120 g, ±240 g, or ±480 g.

· The device can transmit data from multiple g-ranges during predefined time slots.

· It is available in a 12-lead, 4 mm × 4 mm LFCSP package and operates over the automotive temperature range of −40°C to +125°C.

FEATURES

· User-configurable sensor range: ±120 g, ±240 g, and ±480 g.

· Compliant with PSI5 communication protocol V2.1.

· Supports asynchronous and synchronous operation.

· Daisy-chain operation with bidirectional communication.

· Backwards compatible with PSI5 V1.3.

· Selectable 10- or 16-bit sensor data.

· High accuracy interpolation routine.

· User-selectable continuous auto-zero operation.

· Electromechanical sensor self-test.

· High resistance to electromagnetic interference (EMI)/radio frequency interference (RFI).

· Operates from 4.5 V to 16.5 V.

· Includes a unique electronic serial number.

· Qualified for automotive applications.

APPLICATIONS

· Front impact crash sensing.

· Side impact crash sensing.