/a>LED” title=”LED”>LED” title=”LED”>LED driver and oscillator, four-wire serial interface, minimal passive components. Mainly used in wired and wireless optical gaming mice and trackballs, Comprehensive input device and battery-powered input device. This article introduces the main features of ADNS-3050, optical mouse block diagram, 2D assembly drawing and assembly exploded view, and wired and wireless solution circuit diagram.
ADNS-3050: Entry-level Gaming Optical Navigation Sensor
The Avago Technologies ADNS-3050 is a small form factor entry-level gaming optical navigation sensor. It is housed in an 8-pin staggered dual in-line package (DIP). It is capable of high-speed motion detection typically at 60ips and acceleration up to 20g; suitable for both wired and wireless gaming navigation system. The low power management in wireless mode can be customized to suit user preferences. In addition, it has an on-chip oscillator and LED driver to minimize external components.
The ADNS-3050 sensor along with the ADNS-5110-001 lens, ADNS-5200 clip, and HLMP-EG3E red LED forms a complete and compact mouse tracking system. There are no moving parts, which translates to high reliability and less maintenance for the end user. Precision optical alignment is not required, thus facilitating high volume assembly.
Theory of Operation
The ADNS-3050 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. The ADNS-3050 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 ΔX and Δy relative displacement values. An external microcontroller reads and translates the ΔX and Δy information from the sensor serial port into PS2, USB, or RF signals before sending them to the host PC.
ADNS-3050 main features:
Small Form Factor Package – 8-pin DIP
Operating Voltage: 2.8V-3.0V
High Speed Motion Detection at typical of 60ips and acceleration up to 20g.
Selectable Resolutions up to 2000cpi
Four wire Serial Port Interface
External Interrupt Output for Motion Detection
Internal Oscillator — no clock input needed
On-chip LED driver
Minimal number of passive components
Programmable power-saving modes for selectable wired or wireless application
Customizable response time and downshift time for rest modes
Configurable LED operating modes and drive current
Wired and Wireless Optical gaming mice and trackballs
Integrated input devices
Battery-powered input devices
Figure 1. ADNS-3050 2D Assembly Drawing (Top and Side Views)
Figure 2. ADNS-3050 Assembly Exploded View
Figure 3. ADNS-3050 Optical Mouse Block Diagram
Figure 4. ADNS-3050 and wired solution with HLMP-EG3E red LED MCU interface
Figure 4. ADNS-3050 and Wireless Solution with HLMP-EG3E Red LED MCU Interface
For details, see: