2

Pinout of ADNS-3000 Optical Mouse Sensor

Pin

Name

Input/

Output

Description

1

MISO

O

Serial Data Output

(Master In/Slave Out)

2

LED

I

LED Illumination

3

MOTION

O

Motion Interrupt Output

(Default active low,

edge triggered)

4

NCS

I

Chip Select

(Active low input)

5

SCLK

I

Serial Clock

6

GND

I

Ground

7

VDD

I

Supply Voltage

8

MOSI

I

Serial Data Input

(Master Out/Slave In)

Figure 1. Package Outline Drawing (Top View)

Theory of Operation

The ADNS-3000 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-3000 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 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.

Item

Marking

Remarks

Product Number

A3000

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.

ADNS-3000 Low Power Optical Mouse Sensor