Analog Devices ADXL330 Three-Axis Accelerometer

Chipworks is offereing a process review report about the Analog Devices ADXL330 three-axis accelerometer.

Analog Devices has just celebrated a design win with the Analog Devices ADXL330 device in the Nintendo Wii Console. The Wii Console will not be launched until later this year. Chipworks takes you inside the accelerometer months in advance.

The ADXL330 three-axis accelerometer is the latest addition to Analog Devices family of motion signal processing products. The ADXL330 is a small, low power three-axis accelerometer with signal conditioned voltage outputs, all on a single monolithic IC. The product measures acceleration with a minimum full-scale range of ±2g. It can measure the static acceleration of gravity in tilt-sensing applications, as well as dynamic acceleration resulting from motion, shock, or vibration.

Capacitor Beams & Anchors
Capacitor Beams & Anchors

Designed for mobile phone handsets and other handheld consumer electonics products, the power consumption is extremely low, less than 200 microamps at 2.0 V. Supply voltage range is 2.0 V to 3.6 V. The ADXL330 is compatible with applications that require bandwidths in the range of 0.5Hz to 1.6kHz. The ADXL330 can be found in cost-sensitive applications such as cellular handsets, gaming devices, disk drive protection, image stabilization, and sports and health devices.

Proof Mass & Double Anchor
Proof Mass & Double Anchor

What is interesting about the ADXL330?

Chipworks confirms the uniqueness of the ADXL330 process technology through analysis and images that demonstrate the combination of the MEMS sensor structures and signal conditioning circuitry within a single die. Analog Devices leveraged this expertise to reduce the power consumption to less than 50 percent of typical competing devices. The ADXL330 is delivered in a small, low-profile, 4 mm × 4 mm × 1.45 mm, 16-lead, plastic lead frame chip scale package, with a shock rating of 10,000 g.

Proof Mass Corner Overview
Proof Mass Corner Overview

Competitive +/-2g range 3D accelerometers from Kionix and Freescale have also been analyzed by Chipworks recently. The Kionix KXM52 (PPR-0512-802) features a single crystal Si MEMS structure co-packaged with a control ASIC. The Freescale MMA7260Q (PPR-0512-801) features a polysilicon based MEMS structure also co-packaged with a control ASIC.

The ADXL330 MEMS structure differs from the previous analyzed MEMS devices. For example, the Kionix KXM52 features a separate MEMS sensor for each sense axis, while the ADXL330 uses innovative technology to extract all three sense axis from a single MEMS sensor. In addition, the ADXL330 is fabricated on a single monolithic IC, reducing size, power consumption and packaging costs.

To order a copy of this report or for more information, please contact Chipworks.