Tailored gyroscopes target shake-free images on mobiles and cameras

September 11, 2013 // By Graham Prophet
ST’s new 2-axis and 3-axis MEMS gyroscopes implement optical image stabilisation in smartphones and digital still cameras; the sensors offer increased damage-protection through a combination of high resonant frequency and the mechanical structure.

STMicroelectronics has introduced a new family of gyroscopes optimised for optical image stabilisation in smartphones and digital still cameras. By moving the lens in real time to compensate for physical movement of the camera, stabilisation can significantly improve the sharpness of the image, especially when taking photographs in low light, when hand jitter during the longer exposure time would blur images.

In addition, to assure maximum reliability, the new 2-axis (L2G3IS) and 3-axis (L3G3IS) gyroscopes operate with a resonant frequency of the sensing mass at around 20 kHz. As a result of this high resonant frequency in combination with the mechanical structure, the devices are immune to the damage that could be caused by ultrasonic cleaning equipment (typically operating at around 30 kHz) that many customers use to clean devices before equipment assembly.

Other key features of the new devices include ±65 dps / ±130 dps full-scale range, SPI digital interface, embedded temperature sensor, and integrated low- and high-pass filters with selectable bandwidth. The devices operate with supply voltage from 2.4V to 3.6V and are housed in an LGA-16, 3 x 3.5 x 1 mm package. For the 2-axis (L2G3IS) and 3-axis (L3G3IS) gyroscopes, pricing is $2.37 and $3.38 respectively (1000).

ST; www.st.com/gyroscopes