Avago - World’s Smallest USB Optical Mouse Sensor System-on-Chip

The ADNS-2700 sensor contains an Image Acquisition System (IAS), a Digital Signal Processor (DSP) and a USB stream output in a small-footprint 8-pin dual in-line package (DIP). With an integrated oscillator and pull-up resistor, the device further reduces external component count. The sensors do not require precision optical alignment, facilitating high-volume assembly. On-chip One-Time-Programming memory enables designers to program their own product and vendor identification information and to select the resolution setting and sensor orientation without any need for a software driver, providing streamlined customization. The ADNS-2700 optical sensors provide precise, high-speed tracking for mice with best-in-class motion detection of up to 30 inches per second (ips) and 8g acceleration detection. The programmable resolution ranges from 250 up to 1250 counts per inch (cpi) for highly accurate, sensitive navigation.

“The integration and ease-of-design of the ADNS-2700 SoC offers a cost-effective solution for basic mouse applications while delivering the excellent tracking performance, reliability and manufacturability that Avago sensors are known for,” said Angeline Khoo, marketing manager for mouse sensor products at Avago. “The introduction of this small form factor SoC for entry-level corded mice, along with our low-power optical sensor solutions for wireless mice, highlights the breadth of Avago’s industry-leading portfolio of navigation sensors for human interface devices.” In a related announcement, Avago today introduced the ADNS-2080 and ADNS-3000 optical sensors that enable over a year of battery life for wireless mice using a single AA battery.

Optical Navigation Technology

The sensors measure changes in position by optically acquiring sequential surface images and mathematically determining the direction and magnitude of movement from the changes in the images. The DSP automatically processes images from the IAS to determine the direction and distance of motion. It then generates the relative displacement values and converts this to USB motion data, freeing designers from dealing with source code or firmware.

Avago pioneered the optical navigation technology found in many mice used throughout the world today. To date, Avago has shipped over a billion optical navigation sensors to a wide range of global customers.