ADNS-7630-TR Avago Technologies US Inc., ADNS-7630-TR Datasheet - Page 9

• Manufacturer Part Number: ADNS-7630-TR
• Description: BT SoC LaserStream Sensor (TR)
• Manufacturer: Avago Technologies US Inc.

Specifications of ADNS-7630-TR

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Sensor
Figure 6. Exploded view drawing of ADNS-7630 sensor coupled with ADNS-7100-001 lens, PCB & base plate (front view and top side view)
As shown above, the components self align as they are
mounted onto defined features on the base plate. There
should be guide holes on the PCB to align the ADNS-
7100-001 lens to the ADNS-7630 sensor’s aperture stop.
The ADNS-7630 sensor is designed for mounting on the
bottom side of a PCB, looking down.
The integrated VCSEL is used for the illumination, provides
a laser diode with a single longitudinal and a single trans-
verse mode. Together with the VCSEL contained in the sen-
sor package, the ADNS-7100-001 lens provides directed
illumination and optical imaging necessary for the opera-
tion of the sensor. The lens is a precision molded optical
component and should be handled with care to avoid
scratching and contamination on the optical surfaces.
3D drawing files in STEP or IGES format for the sensor,
lens and base plate describing the components and base
plate molding features for the lens and PCB alignment is
available.
Design considerations for improving ESD Performance
The table below shows typical values assuming base plate
construction per the Avago Technologies supplied IGES
file for ADNS-7100-001 lens. Note that the lens material is
polycarbonate and therefore, cyanoacrylate based adhe-
sives should not be used as they will cause lens material
deformation.
9
Typical Distance
Creepage
Clearance
Base Plate
Millimeters (mm)
11.87
10.05
PCB
Lens
Base Plate
Lens
PCB
PCB Assembly Considerations and Soldering Profile
1. Prior to PCB assembly, handling precaution must be
2. Surface-mount the sensor package and all other
3. Reflow the entire assembly with a no-wash solder flux
4. Remove the protective kapton tapes from both optical
5. Place the PCB over the lens onto base plate. The sensor
6. Recommended: The lens can be permanently located
7. Then, install the mouse top case. There MUST be
taken for ADNS-7630 sensor that is classified as MSL-
3. (For more information, please refer to IPC/JEDEC
J-STD-033B.1: Handling, Packing, Shipping and Use of
Moisture/Reflow Sensitive Surface Mount Devices)
electrical components onto PCB.
process (refer to Figure 7 below).
apertures on the ADNS-7630 sensor by using flat-head-
ed tweezer. Care must be taken to keep contaminants
from entering the aperture. Recommend not to place
the PCB facing up during the entire assembly process.
Recommend to hold the PCB vertically for the kapton
tapes removal process.
package should be self-aligned to the lens. The optical
center reference for the PCB is set by base plate and
lens. Note that the PCB movement due to button
presses must be minimized to maintain good optical
alignment.
by heat-staking or ultrasonic-staking the lens’ guide
posts over the PCB board.
feature in the top case (or other area) to press down
onto the PCB assembly to ensure the sensor and lens
are interlocked to correct vertical height.
Sensor