MEMS Digital Dual-Axis Gyro Improves Camera Stabilization

摘要

Addressing lower-cost optical-image stabilization (OIS) as a major goal, InvenSense Inc. has unveiled the first digital dual-axis pitch and roll (X and Y) gyroscope for camera phones and digital still cameras. Its next-generation IDG-2000 family offers the smallest such devices on the market, housed in a 4- by 4- by 0.9-mm quad flat no-lead (QFN) package (Fig. 1). The chip is designed for OIS applications in digital still cameras and high-resolution camera phones of 8 Mpixels and above. The IDG-2000 features a pair of integrated 16-bit analog-to-digital converters (ADCs), one per axis, as well as a programmable digital low-pass filter, anti-aliasing filters optimized for OIS applications, and an integrated sensor for temperature-compensated bias adjustment. The ADCs allow for direct communication with advanced image processors over an I~2C or serial-peripheral interface (SPI) bus, eliminating costly discrete components.