Avago ADBS-A320光查找导航传感器解决方案

Avago 公司的ADBS-A320是采用LED照明的低功耗光查找导航（OFN）传感器，采用新的低功耗架构和自动功率管理模式，适合高达15ips的高速运动的检测。由于集成了振荡器和LED，从而使外接元件最小化。自调整帧速以得到最佳性能，可选择分辨率250, 500, 750, 1000 和1250 cpi，运动检测和查找检测引脚输出，双电源2.8V/1.8V或单电源2.8V供电。主要用于查找输入设备，移动设备，综合输入设备和以电池为能源的输入设备。本文介绍了ADBS-A320主要特性，OFN手持演示板架构图，以及多种ADBS-A320和3V/1.8V微控制器间接口电路图。
The ADBS-A320 sensor is a small form factor (SFF) LED illuminated optical finger navigation system.
The ADBS-A320 is a low-power optical finger navigation sensor. It has a new, low-power architecture and automatic power management modes, making it ideal for batteryand power-sensitive applications such as mobile phones.
The ADBS-A320 is capable of high-speed motion detection – up to 15ips. In addition, it has an on-chip oscillator and integrated LED to minimize external components.
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 either a serial peripheral interface or a two wire interface port. It is packaged in a 28 I/O surface mountable package.
The ADBS-A320 is designed for use with ADBL-A321 lens. The ADBL-A321 lens is the optical component necessary for proper operation of the sensor.
Theory of Operation
The ADBS-A320 is based on Optical Finger Navigation (OFN) Technology, which measures changes in position by optically acquiring sequential surface images (frames) and mathematically determining the direction and magnitude of movement.
The ADBS-A320 contains an Image Acquisition System (IAS), a Digital Signal Processor (DSP), and a communication system.
The IAS acquires microscopic surface images via the lens and illumination system. These images are processed by the DSP to d...