Overview
The ADXL346ACCZ-RL7, produced by Analog Devices Inc., is a small, thin, ultralow power, 3-axis accelerometer designed for high-resolution measurement of static and dynamic acceleration. It is particularly well-suited for mobile device applications, including tilt-sensing, motion detection, and shock measurement. The device features a high resolution of up to 13-bit at ±16 g, with a scale factor of 4 mg/LSB across all g ranges. It operates within a supply and I/O voltage range of 1.7 V to 2.75 V and supports both SPI (3- and 4-wire) and I2C digital interfaces. The ADXL346ACCZ-RL7 is packaged in a compact 3 mm × 3 mm × 0.95 mm, 16-lead LGA package, making it ideal for space-constrained designs.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Measurement Range | User selectable | ±2 g | ±16 g | ||
| Nonlinearity | ±0.5 % | % of full scale | |||
| Inter-Axis Alignment Error | ±0.1 | Degrees | |||
| Cross-Axis Sensitivity | ±1 % | ||||
| Output Resolution | All g ranges | 10 bits (±2 g) | 13 bits (±16 g) | ||
| Supply Voltage | 1.7 V | 2.75 V | V | ||
| Operating Temperature Range | -40 °C | +85 °C | °C | ||
| Standby Mode Supply Current | 0.2 μA | μA |
Key Features
- Ultralow power consumption: as low as 23 μA in measurement mode and 0.2 μA in standby mode at VS = 2.6 V (typical)
- User-selectable resolution up to 13-bit at ±16 g
- Single tap/double tap detection
- Activity/inactivity monitoring
- Free-fall detection
- Concurrent four- and six-position orientation detection
- SPI (3- and 4-wire) and I2C digital interfaces
- Flexible interrupt modes mappable to either interrupt pin
- Integrated 32-level FIFO buffer for data storage
- Low power modes with threshold sensing and active acceleration measurement
Applications
- Mobile devices (handsets, tablets)
- Medical instrumentation
- Gaming and pointing devices
- Industrial instrumentation
- Personal navigation devices
- Hard disk drive (HDD) protection
Q & A
- What is the measurement range of the ADXL346ACCZ-RL7? The measurement range is user-selectable and can be set to ±2 g, ±4 g, ±8 g, or ±16 g.
- What is the output resolution of the ADXL346ACCZ-RL7? The output resolution varies with the g range, up to 13-bit resolution at ±16 g.
- What are the supported digital interfaces? The device supports both SPI (3- and 4-wire) and I2C digital interfaces.
- What is the operating temperature range of the ADXL346ACCZ-RL7? The operating temperature range is from -40 °C to +85 °C.
- What are some of the special sensing functions of the ADXL346ACCZ-RL7? It includes single tap/double tap detection, activity/inactivity monitoring, free-fall detection, and concurrent four- and six-position orientation detection.
- How does the ADXL346ACCZ-RL7 manage power consumption? It features ultralow power consumption, with power scaling automatically with bandwidth, and low power modes with threshold sensing and active acceleration measurement.
- What is the package size of the ADXL346ACCZ-RL7? The device is packaged in a 3 mm × 3 mm × 0.95 mm, 16-lead LGA package.
- Is the ADXL346ACCZ-RL7 RoHS compliant? Yes, the device is Pb free/RoHS compliant.
- What is the purpose of the integrated FIFO buffer in the ADXL346ACCZ-RL7? The 32-level FIFO buffer is used to store data, minimizing host processor activity and lowering overall system power consumption.
- Can the interrupt modes be customized in the ADXL346ACCZ-RL7? Yes, the interrupt modes are flexible and can be mapped to either interrupt pin.
