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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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ADNS-3550 Arkusz danych(PDF) 6 Page - AVAGO TECHNOLOGIES LIMITED |
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ADNS-3550 Arkusz danych(HTML) 6 Page - AVAGO TECHNOLOGIES LIMITED |
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6 / 28 page  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 |
Podobny numer części - ADNS-3550 |
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Podobny opis - ADNS-3550 |
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