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ADNS-3090 Datasheet(PDF) 8 Page - AVAGO TECHNOLOGIES LIMITED |
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ADNS-3090 Datasheet(HTML) 8 Page - AVAGO TECHNOLOGIES LIMITED |
8 / 38 page 8 Figure 8. Schematic Diagram for USB, PS/2 mouse application with ADNS-3090 Notes 1. Caps for pins 15 and 17 MUST have trace lengths LESS than 5 mm to nearest ground pin. 2. Pins 15 and 17 caps MUST use pin 16 GND. 3. Pin 9, if used, should not be connected to PCB GND to reduce potential RF emissions. 4. The 0.1 uF caps must be ceramic. 5. Caps should have less than 5 nH of self inductance. 6. Caps should have less than 0.2 Ω ESR. 7. NC pins should not be connected to any traces. 8. Surface mount parts are recommended. 9. Care must be taken when interfacing a 5V microcontroller to the ADNS-3090. 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. 10. VDD3 and GND should have low impedance connections to the power supply. 11. Capacitors connected to pin 15 and 17 should be connected to pin 16 and then to pin 19. ADNS-3090 USB MCU 0.1 PF 14 10 Vcc Vpp 9 VSS 4.7 PF Ceramic Resonator AVX KBR -24.0-MSA Murata CSAL24MOX040 17 5 V DD LED_CTRL SURFACE Internal Image Sensor ADNS 2120 Lens HLMP-ED80 24 MHz 8 10 OSC_OUT OSC_IN 15 GND 0.1 PF 24 P0.5 3 P0.4 4 6 MOSI RESET P0.2 23 1.3 K : 16 15 D - D + Vreg 11 P1.7 P1.5 P1.4 Z LED 17 18 7 Vcc D + D - GND SHLD 240 : 6 MHz 12 13 XTALIN XTALOUT (Optional) 6 5 P1.2 P1.0 Buttons L M QA QB Vcc GND V DD 19 16 GND 1 K : REFB 14 P0.3 7 NPD 4 P0.7 3 SCLK 21 P0.6 2 MISO 22 9 GUARD 11 18 20 P1.1 R Notes: All capacitors close to chip 24 MHz and 6 MHz close to chip 20 K 20 K 1 NCS LP2950ACZ-3.3 31 2 Vo Vin GND 4.7 PF 0.1 PF 0.1 PF MMBT2222A 13 REFC 2.2 PF 187 : 1/8 W Vo Vo 3.3V 12 OPTP Ω Ω 20 10 K : 10 K : |
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