company blog about ADI ADXL312WACPZ Ultra Low Power 3-Axis Digital Accelerometer

ADI ADXL312WACPZ Ultra Low Power 3-Axis Digital Accelerometer

Shenzhen Mingjiada Electronics Co., Ltd, as a professional electronic components distributor, supplies ADI ADXL312WACPZ ultra-low power 3-axis digital accelerometer. This product with its excellent performance parameters and a wide range of applications in automotive electronics, industrial equipment, consumer electronics and other industries are widely used.

Product Description Of ADXL312WACPZ

ADXL312WACPZ is a small, thin, low power, 3-axis accelerometer with high resolution (13-bit) measurement up to ±12 g. Digital output data is formatted as 16-bit twos complement and is accessible through either a serial port interface (SPI) (3- or 4-wire) or I2C digital interface.

ADXL312WACPZ is well suited for car alarm or black box applications. ADXL312WACPZ measures the static acceleration of gravity in tilt-sensing applications, as well as dynamic acceleration resulting from motion or shock. ADXL312WACPZ's high resolution (2.9 mg/LSB) enables resolution of inclination changes of as little as 0.25°. A built-in FIFO facilitates using oversampling techniques to improve resolution to as little as 0.05° of inclination.

ADXL312WACPZ several special sensing functions are provided. Activity and inactivity sensing detects the presence or absence of motion and whether the acceleration on any axis exceeds a user-set level. These functions can be mapped to interrupt output pins. An integrated 32 level FIFO can be used to store data to minimize host processor intervention.

ADXL312WACPZ low power modes enable intelligent motion-based power management with threshold sensing and active acceleration measurement at extremely low power dissipation.

ADXL312WACPZ is supplied in a small, thin 5 mm × 5 mm × 1.45 mm, 32-lead, LFCSP package.

ADXL312WACPZ core features:

Measurement range: ±2g/±4g/±8g/±16g (user-programmable selection)

Resolution: 13-bit (within ±16g)

Output data format: 16-bit binary complement, accessed via SPI (3-wire or 4-wire) or I2C digital interface

Supply voltage range: 2.0V to 3.6V (I/O voltage range 1.7V to VS)

Operating temperature range: -40°C to +85°C (industrial grade standard)

Package: 5mm × 5mm × 1.45mm LFCSP-32 ultra-thin package

The ADXL312WACPZ accelerometer is particularly suitable for applications that require long battery life, as it consumes as little as 23μA in measurement mode (at VS=2.5V) and an extremely low 0.1μA in standby mode. This ultra-low power consumption makes it ideal for portable devices, wearable devices and IoT nodes.

Core Technology Features and Benefits

The ADXL312WACPZ integrates a number of advanced technologies that give it a significant competitive advantage in its class. These technology features not only enhance performance, but also simplify system design and reduce overall solution cost.

Ultra-low power consumption and intelligent power management is one of the most prominent features of the device. ADXL312WACPZ products use a patented power optimisation design, power consumption automatically adjusts with the data rate, enabling dynamic power management. Measurement mode current is only 30μA at VS=3.3V, and standby mode is as low as 0.1μA, making it ideal for applications that require long-term monitoring but do not allow frequent battery replacement.

The ADXL312WACPZ excels in terms of high accuracy and low noise performance:

X- and Y-axis noise density: 150 μg/√Hz (typical)

Z-axis noise density: 250μg/√Hz (typical)

High resolution (1024 LSB/g) enables it to resolve inclination changes as small as 0.1°.

Tilt resolution can be further increased to 0.025° by using oversampling techniques with the built-in FIFOs

Built-in motion detection provides great convenience for system design.The ADXL312WACPZ integrates a variety of intelligent detection functions, including:

Motion/non-motion detection: detects if the acceleration on any axis exceeds a user-set threshold value

Free-fall detection: for applications such as drop protection

Single/Double Tap Detection: Supports human-computer interaction functions

These functions can be flexibly mapped to two interrupt output pins, greatly reducing the burden on the main processor.

Embedded FIFO technology is another important innovation. 32-level FIFO buffers can store acceleration data, minimising the intervention of the host processor and reducing overall system power consumption. This feature is particularly valuable in applications requiring periodic sampling or burst data transfer.

Wide temperature range and high reliability make the ADXL312WACPZ suitable for harsh environments:

Operating temperature range: -40°C to +105°C (automotive grade)

Shock resistance: 10,000g

Lead-free/RoHS compliant

Certified for automotive applications (AEC-Q100)

ADXL312WACPZ Typical Application Areas

Automotive electronics is an important application direction of ADXL312WACPZ:

Car alarm system: for detecting abnormal vibration or movement of vehicles

Hill Start Assist (HSA) system: Provides driving assistance through incline detection

Electronic brake braking system: to enhance safety

Data logger (black box): records vehicle motion status

The ADXL312WACPZ is also used in a wide range of applications in consumer electronics:

Smartphones and tablets: for automatic screen rotation, gesture recognition

Gaming and pointing devices: to enhance the user interaction experience

Personal navigation devices: to assist with positioning and motion tracking

Hard disc drive (HDD) protection: detecting drops and emergency stopping of heads

The accelerometer excels in industrial applications:

Industrial instrumentation: vibration monitoring, equipment health diagnostics

Medical devices: patient activity monitoring, positioning of medical instruments

IoT end nodes: long-term monitoring of device status

Structural health monitoring: vibration analysis of large structures such as bridges and buildings

Other special applications include:

Drones and robots: attitude control and motion detection

Wearable devices: motion tracking and activity recognition

Smart home devices: vibration alarms, automatic control

Simplified Block Diagram Of ADXL312WACPZ