SDNS-3988 Datasheet, PDF (1/10 Pages) Pixart Imaging Inc. – High Performance Gaming Sensor

SDNS-3988
High Performance Gaming Sensor
Description
SDNS-3988 high performance gaming sensor is a new addition to
PixArt Imaging’s gaming sensor family. The tracking system
comprises of navigation IC, HSDL-4261 IR LED and lens. It
provides enhanced features such as user calibrated lift detection,
variable frame rate, programmable resolution, angle tunability,
angle snap plus configurable sleep and wake up time to suit
various gamers’ preferences.
This gaming sensor is in a 58-pin QFN package. It is designed to
be used with ADNS-2120-001 trim lens to achieve optimum
performance featured in this document.
Theory of Operation
The sensor 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 Δx and Δy relative
displacement values. An external microcontroller reads the Δx
and Δy information from the sensor serial port. The
microcontroller then translates the data into PS2, USB, or RF
signals before sending them to the host PC or game console.
Features
 Small form factor QFN package
 VDDIO range: 1.65 – 3.3V
 16-bits motion data registers
 Maximum speed motion detection of 200ips and acceleration
up to 50g
 Variable Frame Rate for optimum power performance
 Motion detect pin output
 Internal oscillator – no external clock input needed
 Enhanced Programmability
 Frame rate up to 12500fps
 Lift Detection
 Default lift cut-off height – typical 3mm from tracking
surface
 Manually calibrated lift cut-off height – optimized for
individual surface
 Resolution up to 6400cpi with step of ~50cpi
 X and Y axis independent resolution setting
 Register enabled Rest Modes
 Angle Snap and Angle Tunabilty
Applications
 Corded and cordless gaming mice
 Motion input devices
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