6

PCB Assembly Considerations

1. Insert the sensor and all other electrical components

into PCB.

2. Insert the LED into the assembly clip and bend the

leads 90 degrees.

3. Insert the LED clip assembly into PCB.

4. This sensor package is only qualified for wave-solder

process.

5. Wave solder the entire assembly in a no-wash solder

process utilizing solder fixture. The solder fixture

is needed to protect the sensor during the solder

process. It also sets the correct sensor-to-PCB distance

as the lead shoulders do not normally rest on the PCB

surface. The fixture should be designed to expose

the sensor leads to solder while shielding the optical

aperture from direct solder contact.

6. Place the lens onto the base plate.

7. Remove the protective Kapton tape from optical

aperture of the sensor. Care must be taken to

keep contaminants from entering the aperture.

Recommend not to place the PCB facing up during the

entire mouse assembly process. Recommend to hold

the PCB first vertically for the Kapton removal process.

8. Insert PCB assembly over the lens onto the base plate

aligning post to retain PCB assembly. The sensor

aperture ring should self-align to the lens.

Figure 7. Block diagram of ADNS-3000 optical mouse

9. The optical position reference for the PCB is set by the

base plate and lens. Note that the PCB motion due to

button presses must be minimized to maintain optical

alignment.

10. Install mouse top case. There MUST be a feature in

the top case to press down onto the PCB assembly to

ensure all components are interlocked to the correct

vertical height.

Customer supplied base plate with

recommended alignment features

per IGES drawing

ADNS-5110-001

Customer supplied PCB

ADNS-3000 (Sensor)

LED Clip

LED

Important Note: IR LED is recommended for lower power consumption.

Figure 6. Exploded View of Assembly

ADNS-3000

IMAGE ARRAY

DSP

OSCILLATOR

VDD

LED

GND

NCS

SCLK

MOTION

MISO

MOSI

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.

PixArt Imaging Inc.

ADNS-3000 Low Power Optical Mouse Sensor