ADXL357BEZ Introduction
The ADXL357BEZ is a high-performance, low-power, 3-axis digital output accelerometer designed for applications that demand low noise, minimal 0 g offset drift, and long-term stability. It offers selectable measurement ranges of ±10 g, ±20 g, and ±40 g, making it flexible for various precision sensing tasks. Many distributors offer a wide range of electronic components to cater to diverse application needs, like BAS70KFILM
With its low noise density and stable performance over temperature, the ADXL357BEZ is well-suited for accurate tilt measurement even in high-vibration environments. Its digital output and multifunction SPI/I²C interface help integrate it easily into condition monitoring and vibration sensing systems that require dependable, high-resolution data with minimal calibration.
ADXL357BEZ Pinout
CS/SCL: Chip Select for SPI (CS). Serial Communications Clock for I2 C (SCL).
SCLK/VSSIO: Serial Communications Clock for SPI (SCLK). I2 C Mode Enable (VSSIO). Connect this pin to Pin 6 (VSSIO) to enable I2 C mode.
MOSI/SDA: Master Output, Slave Input for SPI (MOSI). Serial Data for I2 C (SDA).
MISO/ASEL: Master Input, Slave Output for SPI (MISO). Alternate I2 C Address Select for I2 C (ASEL).
VDDIO: Digital Interface Supply Voltage.
VSSIO: Digital Ground.
RESERVED :Reserved. This pin can be connected to ground or left open.
V1P8DIG: Digital Supply. This pin requires a decoupling capacitor. If VSUPPLY connects to VSS, supply the voltage to this pin externally.
VSS: Analog Ground.
V1P8ANA: Analog Supply. This pin requires a decoupling capacitor. If VSUPPLY connects to VSS, supply the voltage to this pin externally.
VSUPPLY: Supply Voltage. When VSUPPLY equals 2.25 V to 3.6 V, VSUPPLY enables the internal LDO regulators to generate V1P8DIG and V1P8ANA. For VSUPPLY = VSS, V1P8DIG and V1P8ANA are externally supplied.
INT1: Interrupt Pin 1.
INT2: Interrupt Pin 2.
DRDY: Data Ready Pin.
ADXL357BEZ Symbol
ADXL357BEZ Footprint
ADXL357BEZ 3D Model
ADXL357BEZ Specification
| Parameter | Specification |
| Type | Digital |
| Axis | X, Y, Z |
| Output Interface | SPI / I²C (limited) |
| Measurement Ranges | ±10 g, ±20 g, ±40 g |
| Sensitivity (LSB/g) | 51200 (±10g) ~ 12800 (±40g) |
| Noise Density | Industry leading low noise |
| Offset Drift | Low 0 g offset drift |
| Bandwidth | 1Hz ~ 1kHz |
| Supply Voltage | 2.25V ~ 3.6V |
| Operating Temperature | -40°C ~ 125°C |
| Package Type | 14-CLCC |
ADXL357BEZ Features
Hermetic package offers optimal long-term stability
0 g offset vs. temperature (all axes): 0.75 mg/°C maximum
Ultralow noise spectral density (all axes): 75 μg/√Hz Low power, VSUPPLY (LDO regulator enabled)
Measurement mode: 200 μA
Standby mode: 21 μA
Digital output features
Digital SPI and limited I2C interfaces supported
20-bit ADC
Data interpolation routine for synchronous sampling
Programmable high- and low-pass digital filters Integrated temperature sensor
Voltage range options
VSUPPLY with internal regulators: 2.25 V to 3.6 V
Operating temperature range: −40°C to +125°C
ADXL357BEZ Applications
Inertial measurement units (IMUs)/attitude and heading reference systems (AHRSs)
Platform stabilization systems
Structural health monitoring
Seismic imaging
Tilt sensing Robotics Condition monitoring
ADXL357BEZ Application Circuit
This circuit diagram shows a typical application connection for the ADXL357BEZ, a three-axis digital accelerometer. The core design highlights the interface with an external microcontroller through the SPI/I²C communication bus, along with essential power decoupling and signal routing. On the left side, the interface section includes the key SPI/I²C pins: CS/SCL (chip select or clock), SCLK/SSIO (clock or serial data), MOSI/SDA (master out slave in/data), and MISO/ASEL (master in slave out/address select), which handle configuration and data transmission to support high-speed communication with the host MCU.
On the right, the chip requires two main supply rails: V_SUPPLY (main supply) and V1P8ANA/V1P8DIG (internal analog/digital supply). The diagram shows an input voltage range from 2.25 V to 3.6 V, with external decoupling capacitors (0.1 µF and 1 µF) used for filtering, ensuring stable, low-noise power to prevent interference with sensitive analog front-end and digital logic. At the bottom, the VDDIO and VSSIO pins handle I/O level matching, with local bypass capacitors also provided for stable operation.
ADXL357BEZ Functional Block Diagram
This functional block diagram shows how the ADXL357BEZ three-axis accelerometer processes and manages sensor data internally. At the core is the 3-axis MEMS sensor, which detects acceleration along the X, Y, and Z axes. The signals from these axes pass through an analog filter to reduce noise and unwanted frequency components before reaching three dedicated ADCs (Analog-to-Digital Converters).
After digitization, the outputs are further cleaned by a digital filter to ensure accurate, high-resolution measurement data. This data is then buffered in a FIFO (First-In, First-Out) memory, allowing the device to store multiple samples before transmission. The control logic coordinates the entire operation, managing data flow and responding to the host system through interrupt lines (INT1, INT2, DRDY).
On the right, the serial I/O block handles communication via SPI or I²C, connecting through standard pins (CS/SCL, SCLK/SSIO, MOSI/SDA, MISO/ASEL). Power is managed by integrated LDOs (Low Dropout Regulators), which derive stable analog (V1P8ANA) and digital (V1P8DIG) supply rails from the main VSUPPLY.
ADXL357BEZ Package
ADXL357BEZ Manufacturer
The ADXL357BEZ is manufactured by Analog Devices Inc., a globally recognized supplier of high-performance analog and mixed-signal solutions. The company specializes in developing advanced semiconductor products for signal processing, sensing, measurement, and connectivity. With its strong technical expertise, Analog Devices provides reliable and stable products and services for industries such as industrial automation, automotive, communications, and healthcare.
FAQs
What is the ADXL357BEZ used for?
It’s a low noise, low drift, low power, 3-axis digital accelerometer designed for precision tilt sensing, vibration monitoring, and motion measurement applications.
What measurement ranges does it support?
The ADXL357BEZ offers selectable measurement ranges of ±10 g, ±20 g, and ±40 g.
What makes it different from the ADXL356?
The ADXL356 is the analog output version, while the ADXL357BEZ provides a digital output for easier integration with microcontrollers.