ADXL346 ADXL362 Three‑Axis Accelerometer Sensor Module Ultra‑Low Power I2C SPI Interface Tilt Vibration Detection Module For Arduino DIY Project

ADXL362/346 Three‑Axis Accelerometer Sensor Module

📌 Product Overview

The ADXL346 is a small, thin, ultra‑low‑power 3‑axis accelerometer with high‑resolution (13‑bit) measurements up to ±16g. The digital output data format is 16‑bit binary and can be accessed via a SPI (3‑ or 4‑wire) or I2C digital interface. The ADXL346 is perfect for mobile device applications. It measures static gravitational acceleration for tilt‑sensing applications, as well as dynamic acceleration due to motion or vibration. With its high resolution (4mg/LSB), it can detect tilt changes of less than 1 degree. The ADXL356 offers some special sensing features, such as remotely detecting activity or inactivity by comparing acceleration on any axis with a user‑set g value, tap detection in single or double taps in any direction, and free‑fall detection if the device is dropped. The ADXL356 also has built‑in orientation detection with four‑ and six‑position detection that users can map to interrupt notifications to the controller. These features can each be mapped to one of two interrupt output pins. It has an integrated, patent‑pending memory management system with a 32‑level FIFO buffer to store data, minimizing host processor activity and reducing overall system power consumption. Low‑power mode supports smart motion‑based power management with threshold detection and active acceleration measurement at very low power. The ADXL362 is an ultra‑low‑power, 3‑axis MEMS accelerometer. When outputting data at 100Hz, its power consumption is less than 2μA, and in motion‑triggered wake‑up mode, it’s just 270 nA. Unlike accelerometers that achieve low power by taking periodic samples, the ADXL362 doesn’t undersample or alias the input signal; it samples the full bandwidth of the sensor at the full data rate. The ADXL362 usually offers 12‑bit output resolution, and when lower resolution is enough, it also provides 8‑bit data output for more efficient single‑byte transfers. Its measurement ranges are 2g, 4g, and 8g, with 1mg/LSB resolution in the 2g range. For applications that require noise levels below the ADXL362’s typical 550 μg/√Hz, you can choose one of two low‑noise modes (typical as low as 175 μg/√Hz) with minimal increase in power consumption. Besides being super low‑power, the ADXL362 has many features to help save energy at the system level. It includes a deep multi‑mode output FIFO, a built‑in ultra‑low‑power temperature sensor, and several motion detection modes, including adjustable‑threshold sleep and wake modes, where the power consumption drops to just 270 nA at a measurement rate around 6Hz. If needed, a pin output can directly control an external switch when motion is detected. The ADXL362 also supports external control of the sample rate and/or system clock. It can operate over a wide supply voltage range of 1.6V to 3.5V and can interface with a host running at a separate low voltage if necessary.

📋 Pin Definition

Pin	Function Description
VIN	Power positive
GND	Ground
SCL	I2C serial clock line / SPI serial clock pin
SDA	I2C serial data line / 4‑wire SPI serial data input / 3‑wire SPI serial data input/output
SDO	4‑wire SPI serial data output
CS	Chip select
INT2	Interrupt pin 2
INT1	Interrupt pin 1

✨ Key Features

✅ Ultra‑low power consumption, ADXL362 as low as 270nA in wake‑up mode ✅ Dual I2C & SPI communication interface compatible ✅ Built‑in FIFO buffer for reducing MCU load ✅ Support tap detection, free‑fall detection, sleep‑wake‑up trigger ✅ High‑resolution tilt & vibration measurement ✅ Compact PCB size: 21mm × 14mm ✅ Wide working voltage: 1.6V‑3.5V

🛠 Application Scenarios

• Mobile phones
• Medical devices
• Gaming and pointing devices
• Industrial instruments
• Personal navigation devices
• HDD anti‑drop monitoring
• Tablet screen rotation detection

⚠ Important Usage Notice

Kind reminder: If there are version differences or images not been updated, please refer to the actual product.