The ADXL213 is a low cost, low power, complete dual axis accelerometer with signal conditioned, duty cycle modulated outputs, all on a single monolithic IC. The ADXL213 measures acceleration with a full-scale range of ±1.2 g (typical). The ADXL213 can measure both dynamic acceleration (e.g., vibration) and static acceleration (e.g., gravity).
The outputs are digital signals whose duty cycles (ratio of pulse width to period) are proportional to acceleration (30%/g). The duty cycle outputs can be directly measured by a microcontroller without an A/D converter or glue logic.
Innovative design techniques are used to ensure high zero g bias stability (typically better than 0.25 mg/°C), as well as tight sensitivity stability (typically better than 50 ppm/°C).
The typical noise floor is 160 μg/√, allowing signals below 1 mg (0.06° of inclination) to be resolved in tilt sensing applications using narrow bandwidths (<60 Hz).
The user selects the bandwidth of the accelerometer using capacitors CX and CYM at the XFILT and YFILT pins. Bandwidths of 0.5 Hz to 250 Hz may be selected to suit the application.
The ADXL213 is available in a 5mm x 5mm x 2mm, 8-pad hermetic LCC package.Applications
|Title||Content Type||File Type|
|ADXL213: Low Cost ±1.2 g Dual Axis Accelerometer Data Sheet (Rev A, 08/2010) (pdf, 359 kB)||Data Sheets|
|AN-1057: Using an Accelerometer for Inclination Sensing (pdf, 168 kB)||Application Notes|
|AN-0989: Transitioning from ADXL202 to ADXL213 or ADXL203 (pdf, 76 kB)||Application Notes|
|AN-688: Phase and Frequency Response of iMEMS® Accelerometers and Gyros (pdf, 135 kB)||Application Notes|
|AN-604: Using the ADXL202 Duty Cycle Output (pdf, 529 kB)||Application Notes|
|AN-603: A Compact Algorithm Using the ADXL213 Duty Cycle Output (pdf, 176 kB)||Application Notes|
|AN-600: Embedding Temperature Information in the ADXL202's PWM Outputs (pdf, 81 kB)||Application Notes|
|Transitioning from ADXL202 to ADXL213/ADXL203 (pdf, 62 kB)||Recommended Reading|
Accelerometers--Fantasy & Reality
(Analog Dialogue, May 2009)
|Accelerometer Specifications - Quick Definitions||Technical Documentation||HTML|
|Basic MEMS Terminology (pdf, 40 kB)||Overview|
|RAQs index||Rarely Asked Questions||HTML|
|What are the shock ratings or limits for the MEMS devices?||FAQs/RAQs||HTML|
|What is an inertial sensor?||FAQs/RAQs||HTML|
|What is an accelerometer and a gyroscope, and how do they differ?||FAQs/RAQs||HTML|
|Where would you use an accelerometer?||FAQs/RAQs||HTML|
|Where would you use a gyroscope?||FAQs/RAQs||HTML|
|What are the major error sources for inertial sensors?||FAQs/RAQs||HTML|
|What is the limit of resolution of an inertial sensor?||FAQs/RAQs||HTML|
|I need finer resolution. What do I do?||FAQs/RAQs||HTML|
|MEMS Accelerometer Applications, what's Fantasy and what's Reality?||FAQs/RAQs||HTML|
|Glossary of EE Terms||Glossary||HTML|
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