PixArt Imaging Inc.

PAW3101DB

CMOS Optical Mouse Sensor

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20

PixArt Imaging Inc.

V3.1 May. 2008

7.4 PCB Layout Consideration

Caps for pins 7, 8 must have trace lengths less than 5 mm.

The trace lengths of OSCOUT, OSCIN must less than 6 mm.

7.5 Recommended Value for R1

Radiometric intensity of LED

Bin limits (mW/Sr at 20 mA)

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%

7.5.1 5V Application

R1 value (ohm) for external LED control, VDD = 5.0V (refer to Figure 11)

LED Bin Grade

Min.

Typ.

Max.

N

27

47

P

27

47

Q

27

47

R1 value (ohm) for internal LED control, VDD = 5.0V (refer to Figure 12)

LED Bin Grade

Min.

Typ.

Max.

N

47

100

P

47

100

Q

47

100

7.5.2 3.3V Application

R1 value (ohm) for internal LED control, VDD = VREF = VDD_LED = 3.3V (refer to Figure 13)

LED Bin Grade

Min.

Typ.

Max.

N

22

100

P

22

100

Q

22

100