ADXL255
RECOMMENDED FOR NEW DESIGNSDual-Axis, ±60 g to ±480 g Sensor with SPI and PSI5
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Overview
- User-selectable sensor g range: ±60 g, ±120 g, ±240 g, ±480 g
- Dual, x-axis and y-axis sensor
- Compliant to PSI5 Version 2.1 airbag substandard
- Synchronous operation
- PSI5-P10P-500/3L and others
- Daisy-chain operation with bidirectional communication
- Application-level serial peripheral interface (SPI) communication
- Selectable 16-bit or 10-bit sensor data
- Independently programmable g range and time slot for each axis
- Independent fault discrimination for each axis
- Fully differential analog signal chain
- 0.25 μs data interpolation routine
- User-selectable, continuous auto-zero operation
- High resistance to electromagnetic interference (EMI) and radio frequency interference (RFI)
- SPI mode supply voltage: 3.3 V and 5 V, 5%
- PSI5 mode supply voltage range: 4.5 V to 11.0 V
- Qualified for automotive applications
The ADXL255 is a dual-axis, integrated satellite sensor with userselectable g ranges, compliant to the PSI5 Version 2.1 airbag substandard and backwards-compliant to the PSI5 Version 1.3. The ADXL255 (x-axis and y-axis) enables low-cost solutions for front impact and side impact airbags, as well as satellite sensor and electronic control unit (ECU) main sensor applications. Acceleration data is sent to the control module via a digital, 2-wire current loop PSI5 bus. Communication via the SPI bus is also available for ECU applications.
The ADXL255 uses an error-correction code (ECC)-protected, one-time programmable (OTP) memory. The sensor g range is configurable to provide full-scale measurement of ±60 g, ±120 g, ±240 g, or ±480 g acceleration. The user can program each axis independently with multiple g ranges in different time slots. In PSI5 mode, there are four programmable time slots available. The device transmits 16-bit or 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).
The ADXL255 is available in a 4 mm × 4 mm LFCSP and is specified to operate over the full automotive temperature range of −40°C to +125°C.
Analog Devices is in the process of updating documentation to provide terminology and language that is culturally appropriate, which is a process with a wide scope and will be phased in as quickly as possible. Thank you for your patience.
APPLICATIONS
- Front impact crash sensing
- Side impact crash sensing
Documentation
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| ADXL255WBCPZ-RL | 12-Lead LFCSP (4mm x 4mm x 1.45mm w/ EP) |
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