**ADXL700WBRWZ-RL: A Comprehensive Technical Overview of the Dual-Axis MEMS Accelerometer**
The **ADXL700WBRWZ-RL** from Analog Devices represents a significant advancement in the field of micro-electromechanical systems (MEMS) for motion sensing. This highly integrated, dual-axis accelerometer is engineered to deliver exceptional performance in a compact, surface-mount package, making it an ideal solution for a wide array of demanding applications, from industrial instrumentation to aerospace systems.
At its core, the ADXL700 is a complete acceleration measurement system on a single monolithic IC. It utilizes a sophisticated **MEMS polysilicon surface-micromachined sensor** and conditioning circuitry to implement an open-loop acceleration measurement architecture. The device measures acceleration along two orthogonal axes (X and Y) in the plane of the chip, providing a precise analog voltage output that is proportional to the applied acceleration. A unique feature of this accelerometer is its ability to measure both **static (e.g., gravity) and dynamic acceleration (e.g., shock, vibration)**, which vastly expands its utility.
A standout characteristic of the ADXL700WBRWZ-RL is its remarkable **wide measurement range of ±70 g**. This high-g capability makes it particularly suited for harsh environments where extreme forces are encountered, such as in automotive crash detection, structural health monitoring, and high-performance robotics. Despite this wide range, the device maintains a high level of sensitivity, typically **50 mV/g** when operating from a 5V supply, ensuring that even subtle changes in acceleration can be accurately detected.
The integrated signal conditioning circuitry is a key factor in its performance. The output from the MEMS sensor is amplified, buffered, and filtered on-chip. A crucial component of this circuitry is the **4-pole low-pass Sallen-Key filter**, whose cutoff frequency is set by external capacitors. This allows designers to tailor the bandwidth—from 0.5 Hz to 2.5 kHz—to their specific application, effectively eliminating high-frequency noise and aliasing. Furthermore, the device features a **ratiometric output**, meaning its output voltage scale and the 0 g point are proportional to the supply voltage. This characteristic enhances noise immunity and simplifies integration with analog-to-digital converters (ADCs) that use the supply voltage as a reference.
Housed in a compact 5 mm × 5 mm × 2 mm LFCSP_WD package, the ADXL700WBRWZ-RL is designed for robustness and reliability. Its construction ensures strong resilience against physical shock and environmental factors. The device operates over an extensive **temperature range of -55°C to +125°C**, confirming its suitability for the most challenging industrial, automotive, and aerospace applications.
**ICGOOODFIND**: The ADXL700WBRWZ-RL is a premier dual-axis MEMS accelerometer that excels in high-g environments. Its combination of a wide ±70 g range, user-selectable bandwidth, integrated signal conditioning, and robust packaging establishes it as a superior solution for precision motion and tilt sensing under extreme conditions.
**Keywords**: MEMS Accelerometer, Dual-Axis, ±70 g Range, Ratiometric Output, Wide Temperature Range
