ADNK-2703 Avago Technologies US Inc., ADNK-2703 Datasheet - Page 2

• 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

Buttons
In this reference design, there are 3 standard button inputs:
B1, B2 and B3 for left, right, middle button click respectively.
The minimum time between button pressed is TDBB. The
button connection is described in Figure 2.
Figure 2. Button connections
Debounce Algorithm
x Button inputs B1, B2, and B3 are sampled every 6 ms.
x Two consecutive low values create a button press
x Three consecutive high values create a button release
Mechanical Z-Wheel
The motion of Z-wheel is detected using traditional method
by encoding quadrature signal generated by the mechani-
cal Z-encoder. ADNS-2700 supports only mechanical
Z-Wheel for vertical scrolling. The mechanical Z-wheel will
be connected to the ZA and ZB pins with the common pin
connected to VDD5. Internal pulldowns on the ZA and ZB
pads provide a nominal pulldown current to pull the out-
put down when the Z-wheel switch opens.
The Z-Wheel reporting format which determines the ver-
tical scroll resolution is Z/2. The following must be imple-
mented when using with ADNS-2700. As shown in Figure
3 below, traveling along the quadrature signal to the right
produces a unique set of state tran sitions, and traveling to
the left produces another set of unique state transitions.
1. Use a rotary switch equivalent to the Panasonic part
2. Solder the rotary switch into the PCB such that the
Connect the “A” terminal of the rotary switch to “ZA” and
the “B” terminal to “ZB”. ZA MUST be connected to “Signal
A” in Figure 3 where the z-wheel detents are mechanically
stable.
2
SW
Pin
Note:
Use only 1%
tolerance
resistors
event.
event.
EVQVX at http://industrial.panasonic.com/www-data/
pdf/ATC0000/ATC0000CE20.pdf (The key point is stable
“ZA” switch state in all detent positions).
common pin is closest to the cable end of the mouse.
(Metal plate faces to left).
BL
30 k
R7
BR
R10
15 k
BM
6.8 k
R11
Figure 3. Optics Quadrature Signal Generation
Regulatory Requirements
x Passes FCC B and worldwide analogous emission limits
x Passes EN61000-4-4/IEC801-4 EFT tests when assembled
x UL flammability level UL94 V-0.
x Provides sufficient ESD creepage/clearance distance
Some details on ADNK-2703
The ADNK-2703 reference design mouse unit allows users
to evaluate the performance of the Optical Tracking
Engine (sensor, lens, Led assembly clip, Led) over a USB
protocol. The optical mouse uses the ADNS-2700. This
kit also enables users to understand the recommended
mechanical assembly. (See Appendix C and D)
System Requirements
PCs using Windows
Vista with standard 3-button USB mouse driver loaded.
Functionality
3-button, mechanical scroll wheel mouse.
Operating (For USB Mode)
Hot pluggable with USB port. The PC does not need to be
powered off when plugging or unplugging the evaluation
mouse.
Signal A OFF
Signal B OFF
when assembled into a mouse with shielded cable and
following Avago Technologies recommendations.
into a mouse with shielded cable and following Avago
Technologies recommendations.
to withstand discharge up to 15 kV when assembled
into a mouse with ADNS-5100 round lens according to
usage instructions above.
ON
15°±3°
T1 T2
£
Stable position of detent
2003/ Windows
T3
T4
£
15°±3°
XP/ Windows
£