Product Overview
The ADXL345BCCZ from Analog Devices is a 3-axis digital MEMS accelerometer in a 14-lead LGA (5 x 3 x 1mm) package. It measures acceleration up to ±16g with 13-bit (4mg/LSB) resolution, supporting user-selectable ranges (±2g/±4g/±8g/±16g). Featuring SPI and I2C digital interfaces, ultra-low 23µA measurement current, 32-level FIFO buffer, and built-in activity/inactivity, tap, and free-fall detection with flexible interrupt mapping, it operates from 2.0V to 3.6V and withstands 10,000g shock.
Key Specifications
| Sensor Type | 3-Axis Digital MEMS Accelerometer |
| Measurement Range | ±2g / ±4g / ±8g / ±16g (selectable) |
| Resolution | Up to 13-bit (4 mg/LSB in full-resolution mode) |
| Sensitivity (±2g) | 256 LSB/g (typical) |
| Output Data Format | 16-bit twos complement |
| Interface | SPI (3-wire / 4-wire) and I2C |
| Supply Voltage (VS) | 2.0V to 3.6V |
| I/O Voltage (VDD I/O) | 1.7V to VS |
| Supply Current (measurement) | 23 µA (typical, VS = 2.5V) |
| Supply Current (standby) | 0.1 µA (typical) |
| Supply Current (ODR ≥ 100Hz) | 140 µA (typical) |
| FIFO Buffer | 32-level |
| Bandwidth | 0.1 Hz to 3200 Hz (selectable via serial command) |
| Shock Survival | 10,000 g |
| Operating Temperature | -40°C to +85°C |
| Package | LGA-14 (5 x 3 x 1 mm) |
Features
- 3-axis digital accelerometer with ±2g to ±16g selectable range
- 13-bit resolution at ±16g (4mg/LSB in full-resolution mode)
- Ultra-low power: 23µA measurement, 0.1µA standby
- Power consumption scales automatically with bandwidth
- SPI (3-wire and 4-wire) and I2C digital interfaces
- 32-level FIFO buffer minimizes host processor load
- Activity/inactivity detection with programmable thresholds
- Single-tap and double-tap detection on any axis
- Free-fall detection
- Flexible interrupt mapping to two interrupt output pins
- 10,000g shock survival rating
Applications
- Mobile phone screen orientation and motion sensing
- Gaming controllers and pointing devices
- Hard disk drive (HDD) free-fall protection
- Personal navigation device tilt compensation
- Medical instrument activity monitoring