PixArt Imaging Inc.
High-Performance Optical Mouse Sensor
LP2950ACZ-3.3
3 Vin
GND
0.1
uF
14
Vcc
Vcc
D+
D-
1.3 KΩ
GND
10
16
15
Vpp
D+
D-
P0.7* 21
P0.6 22
P0.5* 23
CYPRESS
CY7C63743A-PC
P0.4* 24
P0.2 3
P0.3 4
10 KΩ
10 KΩ
+
4.7uF
2
0.1uF
0.1uF
0.1uF
+
4.7uF
17
15
ADNS
2120
Lens
Vcc
Vo 1
V DD V DD Internal
Image
16 GND
Sensor
19
GND
3
2
4
1
6
7
SCLK
ADNS-3080
MISO
MOSI
NCS
RESET
NPD
REFB
OSC_IN
GUARD
14
10
9
8
5
HLMP-EG3E-xxxxx
187Ω
1/8 W
BS170
SURFACE
LED_CTRL
11
Vreg
17 P1.7
18
P1.5
REFC
13
+
2.2
uF
Vcc
3
Vcc
SHLD
Scroll Wheel
Encoder
ALPS
EC10E
QA
QB
1
2
7
P1.4
24 MHz
Ceramic Resonator
Murata
CSALS 24 M 0X 53 -B 0
TDK FCR 24. 0 M 2G
Vo 3.3V
P1.0
P1.2
P1.1
5
L
6
M
20
R
Buttons
20KΩ
20KΩ
OSC_OUT
NC
NC
VSS 9
XTALOUT
13
XTALIN
12
11 18
20
6 MHz
(Optional)
20kΩ
NC
OPTP
12
Notes:
- All capacitors close to chip
- 24MHz and 6MHz oscillators close to chip
- * Outputs configured as open drain
20kΩ
Figure 8. Schematic Diagram for USB, PS/2 mouse application with ADNS-3080
Notes
• Caps for pins 15 and 17 MUST have trace lengths LESS than 5 mm to nearest ground pin.
• Pins 15 and 17 caps MUST use pin 16 GND.
• Pin 9, if used, should not be connected to PCB GND to reduce potential RF emissions.
• The 0.1 uF caps must be ceramic.
• Caps should have less than 5 nH of self inductance.
• Caps should have less than 0.2 Ω ESR.
• NC pins should not be connected to any traces.
• Surface mount parts are recommended.
• Care must be taken when interfacing a 5V microcontroller to the ADNS-3080. Serial port inputs on the sensor should be connected to open-
drain outputs from the microcontroller or use an active drive level shifter. NPD and RESET should be connected to 5V microcontroller outputs
through a resistor divider or other level shifting technique.
• VDD3 and GND should have low impedance connections to the power supply.
• Capacitors connected to pin 15 and 17 should be connected to pin 16 and then to pin 19.
All rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission.
8
PixArt Imaging Inc.
E-mail:
fae_service@pixart.com.tw
PIXART [ PIXART IMAGING INC. ]
