2

Theory of Operation

The ADNS-2080 is based on Optical Navigation Technol-

ogy, which measures changes in position by optically

acquiring sequential surface images (frames) and math-

ematically determining the direction and magnitude of

movement.

The ADNS-2080 contains an Image Acquisition System

(IAS), a Digital Signal Processor (DSP), and a two 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 Dx and Dy relative dis-

placement values.

An external microcontroller reads and translates the Dx

and Dy information from the sensor serial port into PS2,

USB, or RF signals before sending them to the host PC.

Pinout of ADNS-2080 Optical Mouse Sensor

Pin

Name

Input/

Output Description

1

SDIO

I/O

Serial Data Input/Output

2

LED

I

LED Illumination

3

MOTION

O

Motion Interrupt Output

(Default active low,

edge triggered)

4

VDDIO

I

Input/Output Reference Voltage

5

SCLK

I

Serial Clock

6

GND

I

Ground

7

VDD

O

Regulator output

8

VDDA

I

Supply Voltage

Figure 1. Package Outline Drawing (Top View)

Item

Marking

Remarks

Product Number

A2080

Date Code

XYYWWZ

X = Subcon Code

YYWW = Date Code

Z = Sensor Die Source

Lot Code

VVV

Numeric

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PixArt Imaging Inc.

PixArt Imaging Inc.

Low Power Optical Mouse Sensor