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ADNB-3552 Datasheet(PDF) 6 Page - AVAGO TECHNOLOGIES LIMITED

Part No. ADNB-3552
Description  Low Power LED Integrated Slim Mouse Sensor
Download  28 Pages
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Maker  AVAGO [AVAGO TECHNOLOGIES LIMITED]
Homepage  http://www.avagotech.com
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ADNB-3552 Datasheet(HTML) 6 Page - AVAGO TECHNOLOGIES LIMITED

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6
PCB Assembly Considerations
1. Surface mount the sensor and all other electrical com-
ponents into PCB.
2. Reflow the entire assembly in a no-wash solder
process.
3. Place the lens onto the base plate. Care must be taken
to avoid contaminating or staining the lens.
4. Remove the protective kapton tape from optical
aperture of the sensor and LED. Care must be tak-
en 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.
5. Insert PCB assembly over the lens onto the base plate
aligning post to retain PCB assembly. The lens piece
has alignment posts which will mate with the align-
ment holes on the sensor aperture.
6. 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.
Typical Distance
Millimeters
Creepage
0.6
Clearance
2.76
Note that the lens material is polycarbonate and there-
fore, cyanoacrylate-based adhesives or other adhesives
that may damage the lens should NOT be used.
7. Install mouse top case. There MUST be a feature in the
top case to press down onto the sensor to ensure the
sensor and lens components are interlocked to the
correct vertical height.
Design Considerations for Improved ESD Performance
For improved electrostatic discharge performance, typi-
cal creepage and clearance distance are shown in the
table below. Assumption: base plate construction as per
the Avago Technologies supplied IGES file and ADNS-
3150-001 lens.
Figure 6a. Sectional view of PCB assembly
(bottom mount)
Figure 6b. Sectional view of PCB assembly
(top mount)
LENS
DIE TO NAVIGATION
SURFACE
NAVIGATION
SURFACE
BOTTOM MATING SURFACE
OF LENS TO NAVIGATION SURFACE
BOTTOM OF LENS
TO NAVIGATION SURFACE
BOTTOM OF PCB TO
NAVIGATION SURFACE
BOTTOM OF PCB TO
BOTTOM MATING
SURFACE OF LENS
CUSTOMER'S PCB
3.25
(0.13)
2.28
(0.09)
0.29
(0.01)
0.97
(0.04)
2.50
(0.10)
SENSOR
CUSTOMER'S
BASE PLATE
LENS
DIE TO NAVIGATION
SURFACE
NAVIGATION
SURFACE
BOTTOM MATING SURFACE
OF LENS TO NAVIGATION SURFACE
BOTTOM OF LENS
TO NAVIGATION SURFACE
TOP OF PCB TO
NAVIGATION SURFACE
TOP OF PCB TO
BOTTOM MATING
SURFACE OF LENS
CUSTOMER'S PCB
2.75
(0.11)
1.78
(0.07)
0.29
(0.01)
0.97
(0.04)
2.50
(0.10)
SENSOR
CUSTOMER'S
BASE PLATE


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