High-performance Optical Mouse Sensor

www.DataSheet4U.com Agilent ADNS-3080 High-performance Optical Mouse Sensor Data Sheet Features • High speed motion detection – up to 40 ips and 15g Description The ADNS-3080 is a high performance addition to Agilent’s popular ADNS family of optical mouse sensors. The ADNS-3080 is based on a new, faster architecture with improved navigation. The sensor is capable of sensing high speed mouse motion - up to 40 inches per second and acceleration up to 15g – for increased user precision and smoothness. The ADNS-3080 along with the ADNS-2120 (or ADNS-2120-001) lens, ADNS-2220 (or ADNS2220-001) assembly clip and HLMP-ED80-XX000 form a complete, compact optical mouse tracking system. There are no moving parts, which means high reliability and less maintenance for the end user. In addition, precision optical alignment is not required, facilitating high volume assembly. The sensor is programmed via registers through a four-wire serial port. It is packaged in a 20-pin staggered dual inline package (DIP). Theory of Operation The ADNS-3080 is based on Optical Navigation Technology, which measures changes in position by optically acquiring sequential surface images (frames) and mathematically determining the direction and magnitude of movement. It contains an Image Acquisition System (IAS), a Digital Signal Processor (DSP), and a four-wire serial port. The IAS acquires microscopic surface images via the lens and illumination system. These images are processed by the DSP to determine the direction and distance of motion. The DSP calculates the ∆x and ∆y relative displacement values. An external microcontroller reads the ∆x and ∆y information from the sensor serial port. The microcontroller then translates the data into PS2 or USB signals before sending them to the host PC or game console. • New architecture for greatly improved optical navigation technology • Programmable frame rate over 6400 frames per second • SmartSpeed self-adjusting frame rate for optimum performance • Serial port burst mode for fast data transfer • 400 or 1600 cpi selectable resolution • Single 3.3 volt power supply • Four-wire serial port along with Chip Select, Power Down, and Reset pins Applications • Mice for game consoles and computer games • Mice for desktop PC’s, Workstations, and portable PC’s • Trackballs • Integrated input devices www.DataSheet4U.com Pinout Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Name NCS MISO SCLK MOSI LED_CTRL RESET NPD OSC_OUT GUARD OSC_IN NC OPTP REFC REFB VDD3 GND VDD3 NC GND NC Description Chip select (active low input) Serial data output (Master In/Slave Out) Serial clock input Serial data input (Master Out/Slave In) LED control output Reset input Power down (active low input) Oscillator output Oscillator gnd for PCB guard (optional) Oscillator input No connect Connect to VDD3 Reference capacitor Reference capacitor Supply voltage Ground Supply voltage No connect Ground No connect TOP VIEW 20 NCS MISO SCLK MOSI LED_CTRL RESET NPD OSC_OUT GUARD OSC_IN 1 2 3 4 16 5 15 6 14 7 13 8 12 9 11 10 NC OPTP REFC REFB VDD3 GND NC GND NC VDD3 A3080 XYYWWZ 19 18 17 PINOUT Figure 1. Package outline drawing (top view) 2 www.DataSheet4U.com Figure 2. Package outline drawing CAUTION: It is advised that normal static precautions be taken in handling and assembly of this component to prevent damage and/or degradation which may be induced by ESD. 3 www.DataSheet4U.com Overview of Optical Mouse Sensor Assembly 2D Assembly Drawing of ADNS-3080 Shown with ADNS-2120, ADNS-2220 and HLMP ED80XX000. Agilent Technologies provides an IGES file drawing describing the base plate molding features for lens and PCB alignment. The components interlock as they are mounted onto defined features on the base plate. The ADNS-3080 sensor is designed for mounting on a through hole PCB, looking down. There is an aperture stop and features on the package that align to the lens. The ADNS-2120 lens provides optics for the imaging of the surface as well as illumination of the surface at the optimum angle. Features on the lens align it to the sensor, base plate, and clip with the LED. The lens also has a large round flange to provide a long creepage path for any ESD events that occur at the opening of the base plate. The ADNS-2220-001 clip holds the LED in relation to the lens. The LED must be inserted into the clip and the LED’s leads formed prior to loading on the PCB. The clip interlocks the sensor to the lens, and through the lens to the alignment features on the base plate. The HLMP-ED80-XX000 LED is recommended for illumination. If used with the bin table, sufficient illumination can be guaranteed. Figure 3. Recommended PCB mechanical cutouts and spacing 4 www.DataSheet4U.com Figure 4. 2D Assembly drawing of ADNS-3080 (top and side view) NOTE: These new Agilent optical mouse sensors, lenses and clips have different physical configurations that require a different PCB mounting method to optimize the navigation performance. Refer Application Notes AN 5035 for further information. 5 www.DataSheet4U.com PCB Assembly Considerations HLMP-ED80-XX000 (LED) ADNS-2220 (Clip) ADNS-3080 (Sensor) Customer supplied PCB ADNS-2120 (Lens) Customer supplied base plate with recommended alignment features per IGES drawing. Figure 5. Exploded view drawing 1. Insert the sensor and all other electrical components into PCB. 2. Insert the LED into the assembly clip and bend the leads 90 degrees. 3. Insert the LED/clip assembly into PCB. 4. Wave Solder the entire assembly in a no-wash solder process utilizing solder fixture. The solder fixture is needed to protect the sensor during the solder process. It also sets the correct sensor-to -PCB distance as the lead shoulders do not normally rest on the PCB surface. The fixture should be designed to expose the sensor leads to solder while shielding the optical aperture from direct solder contact. 5. Place the lens onto the base plate. 6. Remove the protective kapton tape from optical aperture of the sensor. Care must be taken to keep contaminants from entering 6 the aperture. During mouse assembly process, it is recommended that the PCB is held vertically when kapton tapes are being removed. 7. Insert PCB assembly over the lens onto the base plate aligning post to retain PCB assembly. The sensor aperture ring should selfalign to the lens. 8. The optical position reference for the PCB is set by the base plate and lens. Note that the PCB motion due to button presses must be minimized to maintain optical alignment. 9. Install mouse top case. There MUST be a feature in the top case to press down NCS OSCILLATOR SCLK MOSI MISO Serial Port OSC_IN RESONATOR OSC_OUT REFB REFC OPTP NPD VDD3 GND 3.3 V POWER REFERENCE VOLTAGE FILTER NODE IMAGE PROCESSOR LED_CTRL CTRL RESET Figure 6. Block diagram of ADNS-3080 optical mouse sensor VOLTAGE REGULATOR AND POWER CONTROL www.DataSheet4U.com Design considerations for improving ESD Performance The flange on the lens has been designed to increase the creepage and clearance distance for electrostatic discharge. The table below shows typical values assuming base plate construction per the Agilent supplied IGES file and ADNS-2120 lens flange. Typical Distance Creepage Clearance Millimeters 16.0 2.1 and therefore, cyanoacrylate based adhesives or other adhesives that may damage the lens should NOT be used. For improved ESD performance, the lens flange can be sealed (i.e. glued) to the base plate. Note that the lens material is polycarbonate Clip LED Sensor PCB Lens/Light Pipe Base Plate Surface Figure 7. Cross section of PCB assembly 7 www.DataSheet4U.com LP2950ACZ-3.3 3 Vin GND 0.1 uF 14 Vcc Vcc D+ D1.3 KΩ GND 10 16 15 11 Vpp D+ DP0.7* 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 MISO MOSI NCS RESET NPD REFB OSC_IN GUARD 14 10 9 8 ADNS-3080 5 HLMP-ED80 187Ω 1/8 W BS170 SURFACE LED_CTRL Vreg 17 P1.7 18 P1.5 REFC 13 + 2.2 uF Vcc 3 Vcc SHLD Scroll Wheel Encoder ALPS EC10E QA 1 QB 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. 8 www.DataSheet4U.com Enabling the SROM For best tracking performance,SROM is required to be loaded into ADNS-3080. This architecture enables immediate adoption of new features and improved performance algorithms. The external program is supplied by Agilent as a file which may be burned into a programmable device. A micro-controller with sufficient memory may be used. On powe