Model: ADXL345
Brand: Analog Devices
Category: MEMS Sensors / Accelerometers / Digital Accelerometers
📄 Download Datasheet
📄 Detailed Description
The ADXL345 is a high-resolution accelerometer that delivers excellent performance in mobile and portable applications. Its 3-axis sensing capability enables it to measure both static accelerations (like gravity) and dynamic accelerations (resulting from motion or shock). With a resolution of 13 bits, the ADXL345 provides highly accurate measurements with a sensitivity of 3.9 mg per least significant bit (LSB) across all measurement ranges, making it ideal for tilt-sensing and motion tracking applications.
Designed with power efficiency in mind, the ADXL345 operates with extremely low current consumption, drawing only 23 µA in measurement mode and as low as 0.1 µA in standby mode, which ensures extended battery life in mobile applications. The power consumption is dynamically adjusted based on bandwidth settings, optimizing energy usage.
Special sensing features include single tap/double tap detection, activity/inactivity monitoring, and free-fall detection, all of which can be configured to trigger interrupts, reducing the need for continuous host processor monitoring. An embedded FIFO memory buffer minimizes the load on the host processor, enabling efficient data storage and reducing overall system power consumption.
📐 Technical Specifications
| Feature | Description |
|---|---|
| Power Consumption | 23 µA (Measurement Mode), 0.1 µA (Standby Mode) |
| Resolution | 10-bit fixed, up to 13-bit at ±16 g |
| Measurement Ranges | ±2 g, ±4 g, ±8 g, ±16 g |
| Digital Interface | SPI (3/4-wire), I2C |
| Output Format | 16-bit twos complement |
| Bandwidth | Selectable via serial command |
| Temperature Range | −40°C to +85°C |
| Shock Survival | 10,000 g |
| Package | 3 mm × 5 mm × 1 mm LGA |
| Interrupt Features | Activity/Inactivity, Free-fall, Single/Double Tap |
| Power Supply Range | 2.0 V to 3.6 V |
| I/O Voltage Range | 1.7 V to V_S |
| FIFO | 32-level FIFO buffer |
| Compliance | Pb-free, RoHS compliant |
🎯 Key Applications
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Handsets & Smartphones
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Medical Instrumentation
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Gaming & Pointing Devices
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Industrial Instrumentation
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Personal Navigation Devices
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Hard Disk Drive (HDD) Protection
🌐 Product Highlights
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Ultralow Power Consumption: Only 23 µA in measurement mode and 0.1 µA in standby mode, ensuring minimal power draw for extended battery life in portable applications.
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High Resolution: Provides 13-bit resolution at ±16 g, with a sensitivity of 3.9 mg per LSB, ideal for precise motion sensing.
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Multiple Sensing Functions: Includes single/double tap detection, activity/inactivity monitoring, and free-fall detection, enabling intelligent motion-based applications.
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FIFO Memory Buffer: Embedded 32-level FIFO buffer reduces the load on the host processor, saving power and improving overall system performance.
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Flexible Interface Options: Supports both SPI (3-wire and 4-wire) and I2C for easy integration with different host systems.
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Wide Temperature Range: Operates from −40°C to +85°C, making it suitable for a broad range of environmental conditions.
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Shock Survival: Built to withstand up to 10,000 g, ensuring reliability even in harsh conditions.
📢 Note
We offer a wide range of Analog Devices products. If you are looking for other models, feel free to contact us for more information!
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