ADXL355BEZ Detailed explanation of pin function specifications and circuit principle instructions（237 ）

The model "ADXL355BEZ" belongs to Analog Devices, a well-known company specializing in signal processing and analog-to-digital conversion technology. The ADXL355 is a 3-axis accelerometer designed for low- Power , high-performance motion sensing applications.

Here is a detailed explanation of the pin functions, packaging, and a comprehensive FAQ for the ADXL355BEZ:

Pin Functions and Specifications:

The ADXL355BEZ accelerometer is available in a LGA-16 (Land Grid Array) package, which has 16 pins. Below is a detailed description of each pin and its functionality:

Pin Number Pin Name Pin Function Description 1 VDDIO Power supply pin for I/O interface . Connect this pin to the logic supply voltage (typically 1.8V). 2 SDO Serial data output pin. Used to output serial data from the accelerometer in SPI or I2C communication. 3 CS Chip select pin for SPI interface. When this pin is low, the ADXL355 is selected for communication. 4 SDI Serial data input pin for SPI communication. Used for sending data into the device. 5 SCLK Clock input for SPI communication. 6 GND Ground pin. Connect this pin to the system ground. 7 INT1 Interrupt 1 output pin. This pin asserts a logic low when an interrupt condition occurs, such as when an axis exceeds a threshold. 8 INT2 Interrupt 2 output pin. Similar to INT1, but used for different interrupt conditions. 9 VDD Power supply pin for the accelerometer. Connect to the main supply voltage (typically 2.0V to 3.6V). 10 VDDA Analog power supply pin. This pin provides power for the analog circuitry within the accelerometer. 11 NC No connection. This pin is internally tied to GND and should not be used. 12 OUT1 Output pin for acceleration data (axis 1). It provides the analog output representing the X-axis acceleration. 13 OUT2 Output pin for acceleration data (axis 2). It provides the analog output representing the Y-axis acceleration. 14 OUT3 Output pin for acceleration data (axis 3). It provides the analog output representing the Z-axis acceleration. 15 SDA Data pin for I2C communication. Used to send and receive data in I2C mode. 16 SCL Clock pin for I2C communication.

Packaging:

Package Type: LGA-16 (16 pins in total) Dimensions: Typically, the ADXL355BEZ comes in a small footprint, designed for applications where space is limited. Package Features: Surface-mount technology (SMT), ideal for compact PCB designs.

Detailed Pin Function Descriptions:

VDDIO: Provides the logic voltage (1.8V typically) for the I/O interfaces. SDO (Serial Data Output): This is used to transfer data from the ADXL355 to the microcontroller via SPI or I2C. In I2C, it can also be used as the device address bit. CS (Chip Select): This pin is active low. When the CS pin is pulled low, the device is selected for communication. In SPI mode, it tells the ADXL355 to listen for SPI communication. SDI (Serial Data Input): SPI communication input pin. Used for sending data to the device when performing SPI operations. SCLK (Clock): This is the clock input for SPI communication. The frequency of the clock determines the speed of data transfer. GND: Connects to the system ground and is necessary for proper device operation. INT1: When an interrupt condition (like threshold crossing) occurs, this pin is pulled low to alert the system. This pin can be configured for various interrupt conditions. INT2: Same as INT1 but for different interrupt conditions. VDD: Main power supply pin for the accelerometer. Provides power to the device itself. VDDA: Analog supply pin. Used to power the analog components of the device, ensuring high accuracy in measurements. NC: No connection, meaning this pin is not internally connected to anything and should not be used. OUT1 (X-axis output): Provides the analog output for the X-axis acceleration data. OUT2 (Y-axis output): Provides the analog output for the Y-axis acceleration data. OUT3 (Z-axis output): Provides the analog output for the Z-axis acceleration data. SDA: I2C data line for bidirectional data transfer. Used to communicate with the accelerometer over I2C. SCL: I2C clock line. It controls the timing of the I2C communication.

FAQ for ADXL355BEZ:

Q1: How do I interface the ADXL355BEZ with a microcontroller?

A1: The ADXL355BEZ can be interfaced with a microcontroller via SPI or I2C. You will need to connect the CS, SDI, SDO, SCLK pins for SPI or SDA, SCL for I2C. Ensure proper power supply (VDD, VDDIO) and ground connection.

Q2: Can I use both I2C and SPI communication simultaneously?

A2: No, the ADXL355BEZ supports only one communication mode at a time: either SPI or I2C. You must choose between the two modes based on your application.

Q3: What voltage levels should I use for VDD and VDDIO?

A3: VDD should be between 2.0V and 3.6V. VDDIO should typically be 1.8V for proper I/O logic levels.

Q4: How do I configure the interrupt pins?

A4: You can configure the INT1 and INT2 pins by setting the appropriate registers in the ADXL355BEZ. These pins can be set to trigger on specific conditions like threshold crossing or motion detection.

Q5: What is the purpose of the OUT1, OUT2, and OUT3 pins?

A5: These are analog output pins that provide the acceleration data for the X, Y, and Z axes, respectively. The output is proportional to the acceleration measured by the device.

Q6: What is the maximum data rate of the ADXL355?

A6: The ADXL355 supports a maximum data rate of 1kHz for high-resolution measurements.

Q7: Can the ADXL355 handle external shocks or vibrations?

A7: Yes, the ADXL355 is designed for rugged applications and can withstand significant shocks. However, it’s always best to consult the datasheet for the recommended limits.

Q8: What is the accuracy of the ADXL355?

A8: The ADXL355 is a high-precision accelerometer with a resolution of 16 bits and an accuracy of ±0.1% full-scale range.

Q9: Can I adjust the measurement range of the ADXL355?

A9: Yes, the ADXL355 has configurable ranges of ±2g, ±4g, and ±8g. You can select the range by setting the corresponding registers.

Q10: How much power does the ADXL355 consume?

A10: The ADXL355 operates with ultra-low power consumption. It typically uses 0.7μA in low-power mode and up to 250μA in high-performance mode.

The full pin function list and FAQs can be further expanded for specific applications or detailed questions about how to implement particular features of the ADXL355. Let me know if you'd like more details!