Position Sensors / Detectors / Transducers
Linear Position Sensor offers analog and digital evaluation.
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Press Release Summary:
Supplied in 6.6 x 6.4 x 1.1 mm TSSOP20 package, single-chip iC-ML contains 4 Hall sensors for providing analog sine/cosine signals at pole pitch of 2.56 mm. This non-contact integrated magnetic linear position sensor/encoder also has signal conditioning unit with ADC and output interfaces. Three configuration inputs allow 26 different modes of operation to be selected for position evaluation of magnetic tape placed above chip; operating distances of 1-2 mm can be achieved.
Original Press Release:
iC-Ml: Magnetic One-Chip Linear Position Sensor / Encoder Contact Less Linear Sensor with Analog and Digital Evaluation
iC-ML is an integrated magnetic linear position sensor / encoder assembled in a space-saving TSSOP20 package (6.6 x 6.4 x 1.1 mm). The circuit contains four Hall sensors for the generation of analog sine/cosine signals at a pole pitch of 2.56 mm; it also has an integrated signal conditioning unit with an A/D converter and output interfaces. Three configuration inputs allow 26 different modes of operation to be selected for the position evaluation of the magnetic tape placed above the chip. Magnetic field strengths from 20 mT upwards are sufficient for safe operation; a suitable gain or error signal can be used to both monitor the distance of the magnet and to center it.
Operating distances of 1-2 mm between the magnetic tape and package can be achieved, depending on the material and size of the magnet used. In addition to providing pure analog sine and cosine signals for position determination with external interpolator's iC-ML also uses these signals to generate output signals with a resolution of 6, 7 and 8 bits, enabling resolutions of 20 µm and up to 256 linear steps to be acquired.
The linear displacement of iC-ML with respect to the magnetic tape is provided in analog form as a periodic saw tooth and triangle voltage, where the amplitudes are freely selectable. Digital signals are available as A/B quadrature signals with a zero pulse Z and as up/down pulses used to trigger counters. Additional power reduction modes permit the halving of the supply current. Speeds of up to 5 m/s can be processed.
It is possible to cascade several iC-ML devices at once, allowing various coordinates to be scanned; here the chips are activated one after the other in a chain and the position signals output via a 4-wire bus. This simplifies the connecting up of the device to a microcontroller or interpolator for further processing. Deactivated chips with high-impedance bus connections have a very low standby current draw.
Possible areas of application for iC-ML include analog/digital incremental linear scales, contact less sliding switches / linear potentiometers, level sensors, commutation of linear motors and linear sensors in various industrial applications within a temperature range of -40 to 125 °C.
iC-ML's non-contact sensor principle and generous distance tolerance make it particularly suitable for applications where the hermetic separation of the electronics and the mechanical drive is advantageous, such as those used in wet and dusty mechanical engineering environments, for example. The iC-ML is available in the TSSOP20 package and sells for $4.16 USD in the quantities of 1000 units.
Introducing iC-Haus
iC-Haus GmbH is one of the leading independent German manufacturers 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 since 1984 and is represented worldwide. The iC-Haus cell libraries in bipolar, CMOS and BCD technologies are fully equipped to realize the design of Sensor-ASiC, Laser-/Opto-ASiC and Actuator-ASiC devices.
The iCs are assembled either in standard plastic packages or using chip-on-board technology to manufacture complete Microsystems, multi-chip modules or - in combination with sensors - optoBGAs(TM).
Further information is available on the iC-Haus website at www.ichaus.us.
If you have any queries, please contact:
Michael E. Walczak
Vice President
iC-Haus Corporation
Suite 120D
750 east Diehl Road
Naperville, IL 60563
Tel. 630-245-1000 Fax 630-245-1001
