ADNS-2610 데이터 시트보기 (PDF) - Avago Technologies

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ADNS-2610

Optical Mouse Sensor

Avago Technologies 

PCB Assembly Considerations

1. Insert the sensor and all other electrical components

into PCB. Note: Pin 1 of the sensor should always be

the reference point of mechanical cutouts.

2. Bend the LED leads 90° and then insert the LED into

the assembly clip until the snap feature locks the LED

base.

3. Insert the LED/clip assembly into PCB.

4. 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.

The fixture should be designed to expose the sensor

leads to solder while shielding the optical aperture

from direct solder contact. The solder fixture is also

used to set the reference height of the sensor to the

PCB top during wave soldering (Note: DO NOT remove

the kapton tape during wave soldering).

5. Place the lens onto the base plate.

6. Remove the protective kapton tape from optical aper-

ture of the sensor. Care must be taken to keep contami-

nants from entering the aperture. It is recommended

not to place the PCB facing up during the entire mouse

assembly process. The PCB should be held vertically for

the kapton removal process.

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

aligning post to retain PCB assembly. The sensor ap-

erture ring should self-align to the lens.

8. 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.

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

the top case to press down onto the clip to ensure

all components are interlocked to the correct vertical

height.

Design Considerations for Improving ESD Performance

The flange on the lens has been designed to increase

the creepage and clearance distance for electrostatic

discharge. The table below shows typical values assuming

base plate construction per the Avago supplied IGES file

and HDNS-2100 lens flange.

Typical Distance

Creepage

Clearance

Millimeters

16.0

2.1

For improved ESD performance, the lens flange can be

sealed (i.e. glued) to the base plate. Note that the lens

material is polycarbonate and therefore, cyanoacrylate

based adhesives or other adhesives that may damage the

lens should NOT be used.

SERIAL

PORT

SCK

SDIO

SERIAL

PORT

OSCILLATOR

OSC_IN

OSC_OUT

RESONATOR

IMAGE

PROCESSOR

REFA

VOLTAGE

REFERENCE

LED

CONTROL

LED

CONTROL

VDD

5 VOLT

POWER

GND

Figure 6. Block diagram of ADNS-2610 optical mouse sensor.

Sensor

Clip

PCB

LED

Lens/Light Pipe

Base Plate

Surface

Figure 7. Sectional view of PCB assembly highlighting optical mouse components (optical mouse sensor, clip, lens,

LED, PCB and base plate).



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