**ADXL330KCPZ: A Comprehensive Technical Overview of the Low-Power Tri-Axis Accelerometer**

The ADXL330KCPZ from Analog Devices is a low-power, complete **tri-axis accelerometer** with signal conditioned voltage outputs, all housed within a single, compact monolithic IC. This device measures acceleration with a full-scale range of ±3 g, making it exceptionally suitable for a broad spectrum of applications, including **tilt-sensing electronics**, motion-activated user interfaces, and mobile device protection.

At the heart of the ADXL330KCPZ's operation is a sophisticated **polysilicon surface-micromachined sensor** and signal conditioning circuitry. The sensor architecture is built on a differential capacitor structure that moves in response to acceleration. This movement unbalances the differential capacitor, resulting in a sensor output whose amplitude is proportional to the acceleration. This analog signal is then conditioned, amplified, and filtered within the device.

A key feature of this accelerometer is its **user-selectable bandwidth** capability. The X and Y axes are equipped with a 32 kΩ resistor pin (CX and CY), while the Z-axis features a 62 kΩ resistor pin (CZ). By connecting a capacitor between these pins and ground, users can set the desired bandwidth. This allows for significant noise reduction and anti-aliasing, tailoring the device's performance to specific application needs. The bandwidth can be set from 0.5 Hz to 1600 Hz for the X and Y axes, and from 0.5 Hz to 550 Hz for the Z axis.

The ADXL330KCPZ is renowned for its remarkably **low power consumption**, typically drawing just 180 μA at a 2.5 V supply. This ultra-low current draw is a critical enabler for its use in battery-powered, portable electronics where extending operational life is paramount. The device is also highly immune to mechanical and acoustic noise, ensuring reliable and stable performance in real-world environments. It operates over a wide temperature range of -40°C to +85°C and is available in a small, low-profile 4 mm × 4 mm × 1.45 mm LFCSP package.

**ICGOOODFIND**: The ADXL330KCPZ stands out as a premier solution for designers seeking a highly integrated, low-noise, and ultra-low-power acceleration measurement system. Its combination of a complete 3-axis solution on a single chip, flexible bandwidth control, and minimal power requirements makes it an indispensable component for advanced motion sensing in consumer, industrial, and medical applications.

**Keywords**: Tri-Axis Accelerometer, Low-Power Consumption, User-Selectable Bandwidth, Tilt-Sensing, Surface-Micromachined Sensor.