Adxl345

High‑Resolution 3‑Axis MEMS Accelerometer – Adxl345

The ADXL345 is a compact, low‑power 3‑axis accelerometer that delivers high‑precision motion sensing for a wide range of applications, from mobile devices to industrial vibration monitoring. Built on a 3‑mm x 3‑mm silicon‑on‑insulator (SOI) MEMS structure, it offers selectable ±2, ±4, ±8, or ±16 g measurement ranges, 13‑bit digital resolution, and a flexible I²C/SPI interface that allows seamless integration into existing microcontroller or SoC designs. Its low current consumption in standby (≈50 µA) and active (≈3.1 mA) modes, combined with sub‑10 µg/√Hz noise performance, makes it ideal for both battery‑operated wearables and high‑density industrial systems.

Key design advantages include programmable data rates up to 3200 Hz, built‑in FIFO buffering, three‑mode tilt/step detection, and a versatile programmable low‑pass filter. The device operates over a wide voltage range (2.0–3.6 V) and features eight digital-old full‑scale output ports that support a variety of sensor‑fusion applications. Whether used in a consumer gadget, automotive safety system, or machine‑monitoring platform, the ADXL345 delivers reliable, accurate acceleration data with minimal design overhead.

• Key Spec 1: Adjustable measurement range ±2/±4/±8/±16 g with full 13‑bit resolution
• Key Spec 2: Data rate selectable from 0.1 to 3200 Hz, FIFO depth up to 32 samples
• Key Spec 3: Low‑noise performance of < 10 µg/√Hz at 10 kHz, operating voltage 2.0–3.6 V
• Common Use Case: Precision motion detection in mobile gaming controllers, vehicle stability systems, or industrial vibration analysis