ADNS-4000 datasheet(2/30 Pages) AVAGO

2 / 30 page

Theory of Operation

The ADNS-4000 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-4000 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. These images are processed by

the DSP to determine the direction and distance of mo-

tion. The DSP calculates the Dx and Dy relative displace-

ment 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-4000 Optical Mouse Sensor

Name

Input/

Output

Description

MISO

Serial Data Output

(Master In/ Slave Out)

LED

LED Illumination

MOTION

Motion Interrupt Output

(Default active low)

NCS

Chip Select

(Active low input)

SCLK

Serial Clock

GND

Gnd

Ground

VDD

Power

Supply Voltage

MOSI

Serial Data Input

(Master Out/ Slave In)

Figure 1. Package outline drawing (top view)

5 SCLK

6 GND

7 VDD

8 MOSI

3 MOTION

4 NCS

2 LED

1 MISO

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