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PLN2020 twin-eye laser sensor
Introduction The Philips' PLN2020 twin-eye laser sensor is a highprecision, 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 mm3) laserbased 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 massproduced 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
VDD
Min 1.8
Typ 2.3
Max 3.3 15 2 40 135
Unit mm mA mA A W 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
(c) 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 patentsor other industrial or intellectual property rights.

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