The ADXL355BEZ, an Analog Devices product, is a 3-axis MEMO accelerometer with low drift and low noise. It provides selectable ranges and supports both SPI and I2C digital interfaces. Here's how to integrate the ADXL355BEZ into your circuit:

1. Powering the Device:To power the ADXL355BEZ, attach a 2.25V to 3.6V supply to the VDD pin (pin 3). The ground of your circuit should be linked to the GND pin (pin 2). For interfacing with a separate logic voltage, the device has a RADIO pin (pin 4). It's advisable to use decoupling capacitors close to these pins, in line with the guidance in the ADXL355BEZ data sheet.

2. Data Communication:Depending on your preference, you can use SPI or I2C interfaces for data communication with the ADXL355BEZ. If using SPI, you'll need to connect your microcontroller to the SCLK (pin 7), MOST (pin 8), MISS (pin 9), and CS (pin 6). For I2C, you should connect the SDA (pin 9) and SCL (pin 7) to your microcontroller's I2C lines.

3. Interrupts:ADXL355BEZ features two interrupt outputs, INT1 (pin 10) and INT2 (pin 11), that can be programmed to flag specific events, such as the readiness of data, activity detection, or inactivity detection.

4. Synchronization:The SYNC pin (pin 13) facilitates synchronization between multiple ADXL355BEZ accelerometers or other sensors. This allows for precision timing in measurements.

5. Self-Test Control:The ADXL355BEZ includes two pins, ST2 (pin 5) and ST1 (pin 12), that can trigger self-test operations when connected to a digital output from your microcontroller.

To ensure the best performance from the ADXL355BEZ, it's essential to have a thorough understanding of the device's specifications from the data sheet, along with best practices for PCB design, especially with regard to power management and signal routing.