ADNS-8020

Data Sheet

Description

The ADNS-8020 is the Track-on-Glass Laser naviga

tion

sensor empowered by

PixArt Imaging that enables

navigation on all surface types including glass. It is

capable of sensing mouse motion with velocities up to 30

inches per second (ips) on non-glass surfaces, 10 inches

per second (ips) on glass and acceleration up to 8g.

The ADNS-8020 has dual power supplies of 1.8V and 3.0V,

which enables wireless application to lengthen battery

life. It integrates both sensor and VCSEL chips in a single

16-pin molded lead-frame DIP package. It is designed to

be used with ADNS-8100-002 lens to form a complete la-

ser illuminated navigation system. These parts provide a

complete and compact navigation system without mov-

ing parts and laser calibration process is NOT required in

the complete mouse form, thus facilitating high volume

assembly. Performance is not guaranteed if the ADNS-

8020 sensor is paired with a lens other than the ADNS-

8100-002. Additionally, performance is not guaranteed if

the ADNS-8100-002 lens is used in conjunction with a dif-

ferent navigation sensor other than the ADNS-8020.

Theory of Operation

The sensor is based on Track-on-Glass and Laser

technologies, which measure changes in position by op-

tically 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 se-

rial port. The IAS acquires microscopic surface images via

the lens and illumination system provided by the VCSEL.

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 mi-

crocontroller reads the Δx and Δy data information from

the sensor serial port, then translates the data into USB

or RF signals before sending them to the host PC or game

console.

Features

 Track on Glass and Laser technologies

 16-pin molded lead-frame DIP package with integrated

VCSEL

 Dual power operation, 1.8V and 3V

 High speed motion detection up to 30ips on non-glass

surfaces and 10ips on glass surface, and acceleration

up to 8g

 Enhanced SmartSpeed self-adjusting frame rate for

optimum performance

 Motion detect pin output

 16-bit motion data registers

 Internal oscillator – no resonator nor crystal needed

 Programmable resolution up to 1600cpi

 Four wire serial port

 Programmable rest downshift and rest period times

 Minimal number of passive components

 Compliance to IEC/EN 60825-1 Eye Safety

 Class 1 laser power output level

 On-chip laser fault detect circuitry

 Advanced technology 832-865 nm wavelength VCSEL

 Single-mode lasing operation

Applications

 Wired and Wireless Laser Mice

 Optical trackballs

NOTE: The ADNS-8020 will be referred as “sensor” and

the ADNS-8100-002 as “lens” hereafter.

All rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission.

PixArt Imaging Inc.

Track-on-Glass Laser Sensor