Download iC-LTA/iC-PT Optical Encoder Series

iC-LTA/iC-PT – iC-Haus Press Release
The iC-LTA/iC-PT series: new, optical, 6-channel incremental encoder IC
for the electronic commutation of small motors
The iC-LTA/iC-PT series: monolithically integrated speed and commutation
encoders replace Hall encoders in brushless motors
The new optical sensors iC-LTA and the iC-PT series supply incremental and
commutation signals in the smallest possible design space. They are based on a flat
optoQFN that is a mere 0.9 mm thick with a ultrathin glass lid. The optimized
phased array structure of the photochips means that a minimal scanning area of just
1.9 mm x 3.1 mm is enough to generate 2,500 pulses from a code disc measuring
only 26 mm across, for example.
Product photo of iC-LTA and iC-PT3313
Download text and photo at
http://www.ichaus.de/pressroom/ichaus_ltapt_prea.zip
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iC-LTA/iC-PT – iC-Haus Press Release
iC-PT sensors and measurement standards for diameters of 26 mm (iC-PT2613)
and 33 mm (iC-PT33xx) are available. iC-LTA is a functionally compatible yet
unstructured photo array for specific customized design. The Hall sensors used for
motor commutation to date have been replaced by three separate on-chip scanning
tracks. Here, the code disc stipulates the required signal and can be easily designed
to suit the required motor pole count.
The photocurrent signals are conditioned by low-noise CMOS amplifiers and can
either be comparated or interpolated twice and output through 4 mA push/pull
drivers as indexed encoder quadrature signals. Output frequencies of up to 800 kHz
are permitted, enabling motors with speeds of up to 20,000 rpm to be controlled (at
2,500 pulses). Analog test signals can be activated for assembly and alignment.
The small sampling area and a high sensitivity help to reduce the amount of power
needed for the obligatory LED; a few milliamps of operating current are sufficient.
This improves the expected lifetime of the LED, especially if the motor has high
operating temperatures. Devices iC-LTA and iC-PT control the LED themselves
and also compensate for fluctuations in the operating temperature range of -40°C to
+120°C.
Using the latest encoder LEDs, such as iC-TL85 or iC-SD85, for example, the
system current consumption is ca. 12 mA. A supply voltage starting at just 3.5 V is
enough and enables an external polarity protection circuit and voltage regulator to
be added if required when the device is operated on 5 V.
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iC-LTA/iC-PT – iC-Haus Press Release
Introducing iC-Haus
iC-Haus GmbH is a leading independent German manufacturer of standard iCs
(ASSP) and customized ASiC semiconductor solutions. The company has been
active in the design, production, and sales of application-specific iCs for industrial,
automotive, and medical technology for over 25 years and is represented worldwide.
The iC-Haus cell libraries in CMOS, bipolar, and BCD technologies are fully
equipped to realize the design of sensor, laser/opto, and actuator ASiCs.
The iCs are assembled either in standard plastic packages or using iC-Haus's chip-onboard technology to manufacture complete microsystems, multichip modules and
optoBGATM, the latter in conjunction with sensors.
Further information is available at http://www.ichaus.com/iC-PTxxxx.
If you have any queries, please contact:
Horst Huse
Tel: +49 8762 2850
Web:
Fax: +49 8762 2805
Email: [email protected]
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