Satellite Sensor. ADXL185B Datasheet
Low Cost, Single-Axis
PSI5-Compatible Satellite Sensor
User configurable sensor range: ±30 g, ±60 g, ±120 g,
±240 g, ±480 g
Compliant with PSI5 Communication Protocol Version 1.3
Asynchronous operation: PSI5-A10P-250/1L
Synchronous operation: PSI5-P10P-500/3L and others
Daisy-chain operation with bidirectional communication
10-bit sensor data
0.25 µs data interpolation routine
User-selectable, continuous auto-zero operation
Electromechanical sensor self-test
High resistance to EMI/RFI/BCI
4.5 V to 16.5 V operation
Electronic serial number
Qualified for automotive applications
Front impact crash sensing
Side impact crash sensing
Shock and vibration detection
Pedestrian collision sensing
The ADXL185B z-axis sensor and the ADXL189B x-axis sensor
are g range configurable, integrated single-axis satellite sensors,
compliant with the PSI5 Version 1.3 specification. The ADXL185B/
ADXL189B enable low cost solutions for front and side impact
airbag satellite sensor applications. Acceleration data is sent to
the control module via a digital 2-wire current loop interface bus.
The sensor g range is configurable to provide full-scale ranges
from ±30 g to ±480 g. The devices can also be configured to
transmit data from multiple g ranges during predefined time slots,
in accordance with the PSI5 specification. The devices transmit
10-bit acceleration data to the control module and can be configured
to include either a 1-bit parity check or a 3-bit cyclic redundancy
check (CRC). Each device has a unique electronic serial number.
The ADXL185B/ADXL189B are available in a 16-lead, narrow-body
SOIC package with an exposed pad. The ADXL185B/ADXL189B
are specified to operate over the full automotive temperature range
of −40°C to +125°C.
FRONT END (SAFE)
DEMOD Σ-Δ MOD
FUNCTIONAL BLOCK DIAGRAM
DIGITAL SIGNAL PROCESSING
(SN, CAL, CONFIG)
For more information about the ADXL185B/ADXL189B, please contact the Analog Devices, Inc., Customer Interaction Center at
http://www.analog.com/en/content/technical_support_page/fca.html to connect with a technical support specialist.
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
©2014 Analog Devices, Inc. All rights reserved.
©2014 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
Rev. Sp0 | Page 2 of 2