PLN2020
twin-eye laser sensor
Introduction
The Philips’ PLN2020 twin-eye laser sensor is a high-
precision, ultra-fast, low-power consuming, small-sized,
single-component, laser-based tracking device for use in
computer mice, identification devices, printers and mobile
phones.
Complete navigation sensor
that works on virtually all
surfaces
Philips Laser Sensors
General information
The PLN2020 is a fully integrated single-component,
robust, self-aligning and small-sized (<180 mm
3
) laser-
based tracking device. The 11-pin 3.85-mm high twin-eye
laser sensor has a printed circuit board footprint of a mere
6.8 mm x 6.8 mm and incorporates lenses for its two lasers
in the package assembly. Thanks to a dedicated laser
power control scheme, energy use is limited to a minimum
while power management is maximized, making the device
particularly useful for cordless mice.
The PLN2020 is based on laser tracking technology. It
measures changes in position by sensing the scattered
laser light that is reflected by the surface, and
mathematically by on-chip logic and software, determining
the direction and magnitude of the movement. It is capable
of measuring extremely accurately at a wide range of
speeds.
Key features
Design-in simplicity
Complete single integrated component solution
(System-In-Package)
11-pin miniature square package
Intelligent, built-in, multi-mode power management
system
Low-power operation and sleep modes
Accurate optical navigation
Smooth and rough surface navigation
3D motion sensor
Accurate motion up to 500 mm/s (20 ips) with an
extended motion range up to 1000 mm/s
Micrometer resolution (800 cpi)
Single 3.3 volt power supply
SPI serial bus host interface
High-speed serial port registers for programming and
data transfer
Embedded firmware can be upgraded and customized
Active redundant protection system to ensure laser
safety
Lead-free wave solderable (or by manual soldering)
No mechanical moving parts
Insensitive to wear and tear
The PLN2020 does not require a smooth surface, but can
be used on virtually all light-scattering surfaces, even those
with a relatively rough structure. Compact in dimensions,
the PLN2020 is a true ‘system-in-a-package’ that is
suitable for many applications. As there are no moving
parts, and because of its self-aligning optical path, the
application of the technology is simple and can be mass-
produced in a cost-effective manner without applying
expensive aligning procedures.
PLN2020 twin-eye laser sensor
Complete navigation sensor that works on virtually all
surfaces
www.philips.com
Eye safety compliance
The PLN2020 meets Class 1M eye safety requirements*
and contains an active redundant protection system to
ensure laser safety in case of internal and external
hardware failure. Full support through sensor datasheets
and application notes is available.
* Eye safety limits and classification levels are specified in
the International Electrotechnical Commission document
IEC 60825-1, Edition 1.2, 2001-08
Parameter
Free working distance
Supply current “active mode”
Supply current “idle mode”
Supply current “power save
mode”
Power consumption “power
save mode”
Resolution
Maximum speed
Reference data PLN2020
V
DD
Min
1.8
Typ
2.3
Max
3.3
15
2
40
135
Unit
mm
mA
mA
μA
μW
cpi
m/s
800
1
2
ADC
Photo
diode X
Laser
X
Photo
diode Y
Laser
Y
DAC
Pre-processing unit
Modulator
Digital signal
processor
Voltage
regulator
Clock generator /
power controller
11
10
Serial interface
PLN2020 with lens
PLN2020 without lens
1
3
4
7
8
6
5
GND
GND
Decoupling
XTAL_N XTAL_P
MISO MOSI
CLK
CSn
Applications
PC notebook cordless mice
mice for desktop PC’s, portable PC’s and workstations
(corded or cordless)
integrated input devices
track-balls
Block diagram PLN2020
Ordering information
The products are packed in trays of 144 pieces per tray.
Ten trays are packed in a sealed ESD-bag and two bags
are packed in an outer carton. This results in a minimum
order quantity (MOQ) of 2880 pieces per carton.
Date of release: September 2005
Document number: PLS-RGU-05-1060
Published in The Netherlands
© 2005 Philips Electronics N.V.
All rights reserved. Reproduction in whole or in part is prohibited without
prior written consent of the copyright owner. The information presented in
this document does not form part of any quotation or contract, is believed
to be accurate and reliable and may be changed without notice. No
liability will be accepted by the publisher for any consequence of its use.
Publication thereof does not convey nor imply any license under patents-
or other industrial or intellectual property rights.
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