MEMS accelerometer draws only 300nA in motion-activated wake-up mode
June 05, 2012 // Julien Happich
Analog Devices has unveiled an ultra-low power 3-axis MEMS accelerometer that consumes 2µA at a 100Hz output data rate, and only 300nA in motion-triggered Wake-Up mode.
Unlike accelerometers that use power duty cycling to achieve low power consumption, the ADXL362 does not alias input signals by undersampling; it samples the sensor's full bandwidth at all data rates.
This extremely low power consumption allows the ADXL362 to be used in applications that require battery life expectancy of years or decades, and where battery replacement can be impractical or dangerous to the equipment or operator. The part can be used as a motion-activated switch to manage total system power by turning system functions on and off at precisely the correct time, depending on activity level, or predefined motion thresholds.
Equipped with an Awake Status output pin, the motion sensor can instantly trigger a switch that turns on system functions, bypassing the processor in applications where power savings is critical. The device also integrates an enhanced, multiple-sample activity detection function that more accurately distinguishes between different kinds of motion. This eliminates false positives and prevents the sensor from turning the system on unnecessarily and costing additional battery life. The ADXL362 MEMS accelerometer embeds a deep internal FIFO memory block that allows system designers to record data and stream long data sets, reducing processor load and saving additional system power.
Two lower-noise modes that allow the user to about halve the noise at the expense of a few microamps (μA); a built-in micro-power temperature sensor; and the ability to synchronize the sampling time to an external trigger. The ADXL362 natively provides acceleration data with 12-bit resolution, and also provides 8-bit formatted data for more efficient single-byte transfers when a lower resolution is sufficient. The accelerometer has measurement ranges of ±2 g, ±4 g, and ±8 g, with a resolution of 1 mg/LSB on the ±2 g range. The ADXL362 operates on a wide 1.6 V to 3.6 V supply range and can interface, if necessary, to a host operating on a separate, lower supply voltage. Its standby power is 10nA. The device comes in a 3x3.25×1.06mm package.
Get the data sheet at www.analog.com/ADXL362
Visit Analog Devices at www.analog.comAll news
Imagination positions itself for 802.11ah for the Internet of Things
July 24, 2014
Imagination Technologies has developed a low power configurable radio architecture for the wide range of existing and emerging ...
Smartwatches suck, says Pebble backer
Broadcom cuts 2,500 jobs to exit cellular market
Photographic method to survey magnetic field
Signal Integrity guru puts comprehensive SI training online
Failed merger talks won't stop Dialog
July 23, 2014
AMS, formerly known as Austriamicrosystems, and Dialog Semiconductor couldn't agree the terms of a merger, which feels like ...
Peregrine Semiconductor and RF Micro Devices settle all litigation
Atomic clock based on a chip-scale frequency comb
RFID tags track honey bees
- Testing GPS with a Simulator
- DSM presents: Select the best plastic for DDR4
- Dual 13A μModule Regulator with Digital Interface for Remote Monitoring & Control of Power
- Exploring the Business Model Evolution of High-Tech Equipment Manufacturers
InterviewCEO interview: China, not Apple, is way to go, says mCube CEO
Ben Lee, CEO of MEMS startup mCube, explains why he wants to spend $37 million on being a supplier of sensors to Chinese ODMs and avoiding a design win with Apple or Samsung.
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, Altium Ltd is offering EETimes Europe's readers the chance to win one TASKING VX-Toolset for ARM Cortex-M Premium Edition, normally licensed for 2.395 Euros, for ultra-rapid prototyping and code development around ARM Cortex-M based microcontrollers.
The VX-toolset for ARM is the first TASKING compiler suite to receive the Software Platform technology, which is seamlessly...Read more
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.