ADNS-2051
Optical Mouse Sensor
Data Sheet
Description
The ADNS-2051 is a low cost optical sensor used to
implement a non-mechanical tracking engine for
computer mice.
It is based on optical navigation technology, which
measures changes in position by optically acquiring
sequential surface images (frames) and mathemati-
cally determining the direction and magnitude of
movement.
The sensor is housed in a 16-pin staggered dual inline
package (DIP) that is designed for use with the HDNS-
2100 Lens and HDNS-2200 Clip and HLMP-ED80-XX000
(639 nm LED illuminator source). There are no moving
parts, and precision optical alignment is not required, fa-
cilitating high volume assembly.
The output format is two channel quadrature (X and Y
direction) which emulates encoder photo-transistors.
The current X and Y information are also available in
registers accessed via a serial port.
Default resolution is specified as 400 counts per inch
(cpi), with rates of motion up to 14 inches per second
(ips).
Resolution can also be programmed to 800 cpi.
The part is programmed via a two wire serial port,
through registers.
Features
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Precise optical navigation technology
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No mechanical moving parts
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Complete 2D motion sensor
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Serial interface and/or quadrature interface
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Smooth surface navigation
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Programmable frame speed up to 2300 frames per
sec (fps)
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Accurate motion up to 14 ips
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800 cpi resolution
High reliability
High speed motion detector
No precision optical alignment
Wave solderable
Single 5.0 volt power supply
Shutdown pin for USB suspend mode operation
Power conservation mode during times of no
movement
•
On chip LED drive with regulated current
•
Serial port registers
– Programming
– Data transfer
•
16-pin staggered dual inline package (DIP)
Theory of Operation
The ADNS-2051 is based on Optical Navigation Tech-
nology. It contains an Image Acquisition System (IAS), a
Digital Signal Processor (DSP), a two-channel quadrature
output, and a two wire serial port.
The IAS acquires microscopic surface images via the lens
and illumination system provided by the HDNS-2100,
2200, and HLMP-ED80-XX000 LED. These images are
processed by the DSP to determine the direction and
distance of motion. The DSP generates the Δx and Δy
relative displacement values that are converted into two
channel quadrature signals.
Applications
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Mice for desktop PCs, workstations, and portable PCs
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Trackballs
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Integrated input devices
AVAGO [ AVAGO TECHNOLOGIES LIMITED ]
