Theory of Operation
The ADNS-7550 integrated molded lead-frame DIP sensor comprises of sensor and VCSEL in a single package.
The advanced class of VCSEL was engineered by PixArt Imaging to provide a laser diode with a single longitudinal and a single transverse mode. In contrast to most oxide-based single-mode VCSEL, this class of PixArt VCSEL remains within single mode operation over a wide range of output power. It has signifi cantly lower power consumption than a LED. It is an excellent choice for optical navigation applications.

FEATUREs
• Wide operating voltage: 4.0V-5.25V.
• Small form factor, integrated molded lead-frame chip on-board package
• Laser Technology
• High speed motion detection up to 30 ips and 8g
• Enhanced SmartSpeed self-adjusting frame rate for optimum performance
• Motion detect pin output
• 12-bits motion data registers.
• Internal oscillator – no clock input needed.
• Selectable 400, 800, 1200, 1600, 2000 cpi resolution.
• Four wire serial port
• Minimal number of passive components
• Laser fault detect circuitry on-chip for Eye Safety Compliance
• Advanced Technology VCSEL chip
• Single Mode Lasing operation
• 832-865 nm wavelength

APPLICATIONs
• Laser Mice
• Optical trackballs
• Integrated molded lead-frame input devices