PAW3203DI Datasheet, PDF (11/14 Pages) Pixart Imaging Inc. – WIRELESS OPTICAL MOUSE SINGLE CHIP

PixArt Imaging Inc.
PAW3203DI
Wireless Optical Mouse Single Chip
5.5 PCB Layout Consideration
z Caps for pins 8, 10, 11, 12 must have trace lengths less than 5mm.
z The trace lengths of OSCOUT, OSCIN must less than 6mm.
z The trace length of RFosc, RFcarrier must as short as possible.
5.6 Recommended Value for R1
5.6.1 Using Red LED
z Radiometric intensity of red LED
Bin limits (mW/Sr at 20mA)
LED Bin Grade
Min.
Typ.
Max.
N
14.7
-
17.7
P
17.7
-
21.2
Q
21.2
-
25.4
Note: Tolerance for each bin will be ± 15%
z Suggested R1:
Red LED Bin Grade Suggested R1 (ohm)
N
12
P
12
Q
12
5.6.2 Using IR LED
z Suggested R1:
IR LED Bin Grade Suggested R1 (ohm)
TBD
0
It is not guaranteed that the performance of PAW3203DI with IR LED is as good as PAW3203DI with red LED.
PAW3203DI is designed to a very good match with red LED, and this combination has the best performance.
5.6.3 Summary
Light Source
Red LED
IR LED
LED Bin Grade
N, P, Q
TBD
VDD
2.7
1.8
R1 (ohm)
12
0
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PixArt Imaging Inc.
E-mail: [e-mail]
V0.3 April. 2008