ADNK-2703 Avago Technologies US Inc., ADNK-2703 Datasheet - Page 4

• Manufacturer Part Number: ADNK-2703
• Description: A2700 Reference Design Kit
• Manufacturer: Avago Technologies US Inc.
• Series: -r

Specifications of ADNK-2703

• Main Purpose: Reference Design, Optical Mouse
• Embedded: No
• Utilized Ic / Part: ADNS-2700
• Primary Attributes: -
• Secondary Attributes: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

To Disassemble the ADNK-2703 Unit
The ADNK-2703 comprises of the plastic mouse casing,
printed circuit board (PCB), lens, buttons, and USB cable.
(See Figure 4) Unscrewing the one screw located at the
base of the unit can open the ADNK-2703 unit. Lifting and
pulling the PCB out of the base plate can further disas-
semble the mouse unit.
While reassembling the components, please make sure
that the Z height (Distance from lens reference plane to
surface) is valid. The Z-height is from 2.3 to 2.5 mm with a
nominal of 2.4 mm. Refer to Figure 5.
Z =
Figure 5. Distance from lens reference plane to surface
Sensor
The sensor technical information is contained in the
ADNS-2700 Data Sheet.
Lens
The lens technical information is contained in the ADNS-
5100 round lens or ADNS-5100-001 trim lens Data Sheet.
LED Assembly Clip
The information on the assembly clip is contained in the
ADNS-5200 Data Sheet.
LED
The LED technical information is contained in the HLMP-
EG3E Data.
Base Plate Feature – IGES File
The IGES file on the CD-ROM provides recommended
base plate molding features to ensure optical alignment.
This includes PCB assembly diagrams like solder fixture in
assembly and exploded view, as well as solder plate. See
Appendix D for details.
4
(0.094)
2.40
SENSOR
OBJECT SURFACE
LENS
LENS REFERENCE PLANE
Reference Design Documentation – Gerber File
The Gerber File presents detailed schematics used in
ADNK-2703 in PCB layout form. See Appendix C for more
details.
Overall circuit
A schematic of the overall circuit is shown in Appendix A
of this document. Appendix B lists the bill of materials.
USB Interface
All USB Human Interface Device (HID) class applications
follow the same USB start-up procedure. The procedure is
as follows
1. Device Plug-in
2. Bus Reset
3. Enumeration
When a USB device is first connected to the bus, it is
powered and running firmware, but communications
on the USB remain non-functional until the host has
issued a USB bus reset.
The pull-up resistor on D– notifies the hub that a de-
vice has just been connected. The host recognizes the
presence of a new USB device and initiates a bus reset
to that device.
The host initiates SETUP transactions that reveal gen-
eral and device specific information about the mouse.
When the description is received, the host assigns a
new and unique USB address to the mouse. The mouse
begins responding to communication with the newly
assigned address, while the host continues to ask for
information about the device description, configura-
tion description and HID report description. Using the
information returned from the mouse, the host now
knows the number of data endpoints supported by the
mouse (2). At this point, the process of enumeration is
completed.