ADNS-7550
Integrated molded lead-frame DIP Sensor
Data Sheet
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 lon-
gitudinal 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 significantly lower power
consumption than a LED. It is an excellent choice for
optical navigation applications.
The sensor is based on Laser technology, which
measures changes in position by optically acquiring se-
quential 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 il-
lumination 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 the Δx and Δy
information from the sensor serial port. The microcon-
troller then translates the data into PS2, USB, or RF signals
before sending them to the host PC or game console.
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
All rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission.
PixArt Imaging Inc.
E-mail:
fae_service@pixart.com.tw
PIXART [ PIXART IMAGING INC. ]
