Overview
The ADXL312ACPZ is a 3-axis digital accelerometer produced by Analog Devices Inc. This device is designed for high-resolution acceleration measurements, making it suitable for a variety of applications that require precise motion and tilt sensing. The ADXL312 features a compact 32-lead LFCSP package, measuring 5 mm x 5 mm x 1.45 mm, and operates over a wide temperature range of -40°C to +105°C. It is known for its ultralow power consumption, with as low as 57 µA in measurement mode and 0.1 µA in standby mode at 3.3 V supply voltage.
Key Specifications
| Parameter | Value |
|---|---|
| Measurement Range | ±1.5 g, ±3 g, ±6 g, ±12 g |
| Resolution | Fixed 10-bit, up to 13-bit at ±12 g |
| Supply Voltage (VS) | 2.0 V to 3.6 V |
| Interface Voltage Range (VDD I/O) | 1.7 V to VS |
| Supply Current (Measurement Mode) | 57 µA to 300 µA at VS = 3.3 V |
| Standby Mode Current | 0.1 µA at VS = 3.3 V |
| Output Data Rate/Bandwidth | 6.25 Hz to 3200 Hz (user-selectable) |
| Temperature Range | -40°C to +105°C |
| Package Type | 32-Lead LFCSP (5mm x 5mm x 1.45mm) |
| Interface | SPI (3- and 4-wire), I2C |
Key Features
- Ultralow Power Consumption: As low as 57 µA in measurement mode and 0.1 µA in standby mode at 3.3 V supply voltage.
- High Resolution: Up to 13-bit resolution at ±12 g, with a scale factor of 2.9 mg/LSB in all g ranges.
- User-Selectable Resolution and Bandwidth: Allows for flexible configuration to suit various application needs.
- Embedded FIFO Technology: Minimizes host processor load by storing data in a 32-level FIFO.
- Motion Detection Functions: Includes activity/inactivity monitoring and threshold sensing, which can be mapped to interrupt output pins.
- Digital Interfaces: Supports SPI (3- and 4-wire) and I2C interfaces for data communication.
- Wide Temperature Range: Operates from -40°C to +105°C, making it suitable for harsh environments.
- Compact Package: 32-lead LFCSP package measuring 5 mm x 5 mm x 1.45 mm).
Applications
- Car Alarm Systems: For detecting motion and impact.
- Hill Start Aid (HSA): To assist in preventing rollback on inclined surfaces.
- Electronic Parking Brake: For precise motion and tilt sensing).
- Data Recorders (Black Box): To capture detailed motion data in various environments).
Q & A
- What are the measurement ranges of the ADXL312?
The ADXL312 can measure acceleration in the ranges of ±1.5 g, ±3 g, ±6 g, and ±12 g).
- What is the resolution of the ADXL312?
The resolution is fixed at 10-bit, but it can increase up to 13-bit at the ±12 g range, maintaining a 2.9 mg/LSB scale factor).
- What are the power consumption characteristics of the ADXL312?
The device consumes as low as 57 µA in measurement mode and 0.1 µA in standby mode at 3.3 V supply voltage).
- What digital interfaces does the ADXL312 support?
The ADXL312 supports both SPI (3- and 4-wire) and I2C digital interfaces).
- What is the operating temperature range of the ADXL312?
The device operates from -40°C to +105°C).
- What is the package type and size of the ADXL312?
The ADXL312 comes in a 32-lead LFCSP package measuring 5 mm x 5 mm x 1.45 mm).
- Does the ADXL312 have built-in motion detection functions?
Yes, it includes activity/inactivity monitoring and threshold sensing functions that can be mapped to interrupt output pins).
- What is the purpose of the FIFO in the ADXL312?
The 32-level FIFO minimizes host processor load by storing data, allowing for oversampling techniques to improve resolution).
- Is the ADXL312 suitable for automotive applications?
Yes, it is qualified for automotive applications and can be used in car alarm systems, hill start aid, and other automotive functions).
- What is the maximum shock survival rating of the ADXL312?
The device can survive up to 10,000 g shocks).
