The **ADXL362BCCZ-R2** is an ultra-low-power, 3-axis MEMS (Micro-Electro-Mechanical Systems) accelerometer produced by Analog Devices. It is widely recognized for its extremely low energy consumption, making it ideal for battery-operated Internet of Things (IoT) devices. --- ## 1. Key Technical Specifications The following table highlights the core electrical and mechanical characteristics of the ADXL362: | Parameter | Specification | | :--- | :--- | | **Measurement Range** | $\pm 2g, \pm 4g, \pm 8g$ (Selectable) | | **Output Resolution** | 12-bit | | **Interface** | SPI (Serial Peripheral Interface) | | **Supply Voltage ($V_S$)** | 1.6V to 3.5V | | **Current (Measurement Mode)** | 1.8 $\mu$A @ 100 Hz ODR | | **Current (Wake-up Mode)** | 270 nA | | **Current (Standby Mode)** | 10 nA | | **Operating Temperature** | -40°C to +85°C | | **Package Type** | 16-terminal LGA (3 mm × 3.25 mm × 1.06 mm) | --- ## 2. Core Functional Features ### A. Ultra-Low Power Consumption Unlike many accelerometers that use power duty cycling to reduce energy, the ADXL362 uses a continuous sampling architecture. This prevents aliasing of input signals while maintaining current consumption in the micro-ampere range. ### B. Activity/Inactivity Monitoring The chip features built-in logic to detect motion (Activity) and the lack of motion (Inactivity). It can be programmed to act as a "motion switch," powering up the rest of the system only when movement is detected. ### C. Deep FIFO (First In, First Out) It includes a 512-sample FIFO buffer. This allows the host processor to sleep for longer periods while the sensor collects data, significantly reducing the overall system power budget. --- ## 3. Pinout Configuration The ADXL362BCCZ-R2 uses an LGA-16 package. Below are the critical pin assignments: | Pin Number | Name | Description | | :--- | :--- | :--- | | 1 | **VDD I/O** | Digital Interface Supply Voltage | | 4 | **SCLK** | SPI Serial Clock | | 6 | **MOSI** | SPI Master Out Slave In | | 7 | **MISO** | SPI Master In Slave Out | | 8 | **CS** | SPI Chip Select | | 11 | **INT1** | Interrupt Output 1 | | 12 | **INT2** | Interrupt Output 2 | | 14 | **VS** | Supply Voltage | | 13, 16 | **GND** | Ground | --- ## 4. Part Number Breakdown The suffix **"BCCZ-R2"** provides specific information regarding the packaging and temperature grade: * **ADXL362**: The base model number. * **B**: Temperature range (-40°C to +85°C). * **CC**: Package code (LGA). * **Z**: RoHS compliant / Lead-free. * **R2**: Reel size (indicates a 7-inch reel with 250 units; "RL" or "RL7" would indicate larger quantities). --- ## 5. Typical Application Circuit In a standard setup, the ADXL362 communicates with a Microcontroller (MCU) via a 4-wire SPI bus. ```c // Example pseudo-code for initializing ADXL362 via SPI void setup_adxl362() { spi_write(SOFT_RESET, 0x52); // Reset the device spi_write(THRESH_ACT_L, 0xFA); // Set activity threshold spi_write(THRESH_INACT_L, 0x96); // Set inactivity threshold spi_write(POWER_CTL, 0x02); // Begin measurement mode } ```