PixArt Imaging Inc.

PAN3204DB

Wireless Optical Mouse Sensor

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25

PixArt Imaging Inc.

E-mail: fae_service@pixart.com.tw

V3.0, Apr. 2008

8.5 PCB Layout Consideration

Caps for pins7, 8 must have trace lengths less than 5mm.

8.6 Recommended Value for R1

8.6.1 Using Red LED for 2.7V

Radiometric intensity of red LED

Bin limits (mW/Sr at 20mA)

Note: Tolerance for each bin will be ± 15%

Suggested R1(ohm):

Red LED Bin Grade

Min.

Typ.

Max.

P

6.8

22

-

Q

6.8

22

-

8.6.2 Using IR LED for 1.8V

Suggested R1(ohm):

IR LED Bin Grade

Min.

Typ.

Max.

TBD

3.3

22

-

It is not guaranteed that the performance of the mouse sensor with IR LED is as good as the mouse sensor with

red LED. The mouse sensor is designed to a very good match with red LED, and this combination has the best

performance.

8.6.3 Summary

R1

Light Source

LED Bin Grade

VLED

Min.

Typ.

Max.

Red LED

P, Q

2.7

6.8

22

-

IR LED

TBD

1.8

3.3

22

-

LED Bin Grade

Min.

Typ.

Max.

P

17.7

-

21.2

Q

21.2

-

25.4