Avago ADNS-3090光学鼠标传感解决方案

Avago 公司的ADNS-3090是高性能光学鼠标传感器，鼠标运动速度高达60吋/秒，加速度高达20g。采用嵌入式架构，大大提高了光学导航性能，可选择的分辨率为1800 cpi 或 3500 cpi，可编程帧速率超过6400帧/秒，单电源3.3V工作，主要用在游戏机，计算机，工作站的鼠标，以及集成的输入设备。本文介绍了ADNS-3090主要特性，方框图，USB，PS/2鼠标应用电路图和应用装配框图。
ADNS-3090： High Performance Optical Mouse Sensor
The ADNS-3090 is a high performance addition to Avago Technologies’ popular ADNS family of optical mouse sensors.
The ADNS-3090 is based on a new, faster architecture with improved navigation. The sensor is capable of sensing high speed mouse motion - up to 60 inches per second and acceleration up to 20g – for increased user precision and smoothness.
The ADNS-3090 along with the ADNS-2120-001 trim lens, ADNS-2220-001 assembly clip and HLMP-ED80-XX000 form a complete, compact optical mouse tracking system. There are no moving parts, which means high reliability and less maintenance for the end user. In addition, precision optical alignment is not required, facilitating high volume assembly. The sensor is programmed via registers through a four-wire serial port. It is packaged in a 20-pin staggered dual inline package (DIP).
Theory of Operation
The ADNS-3090 is based on Optical Navigation Technology, which measures changes in position by optically acquiring sequential surface images (frames) and mathematically determining the direction and magnitude of movement. It contains an Image Acquisition System (IAS), a Digital Signal Processor (DSP), and a four-wire serial port.
The IAS acquires microscopic surface images via the lens and illumination system. These images are processed by the DSP to determine the direction and distance of motion. The DSP calculates the Δx and Δy relative displacement values.
An external microcontroller reads the Δx and Δy information from the sensor serial port. The microcontroller then translates the data into PS2 or USB signals ...