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Product ReleaseiC NQC has 13 bit real time interpolation now with BiSS C for uninterrupted absolute encoder measurement
For the first time ever high-resolution sine-to-digital converter iC-NQC provides the microelectronics industry with a BiSS C slave protocol that enables bidirectional data exchange at the same time as the cyclic output of measurement data. Normalized addresses device information is available that indexes the relevant standard device profile or a description file. An optional electronic ID plate can also be used to describe the measurement application. In essence, iC-NQC is an interpolation circuit with signal error compensation for sinusoidal sensor signals, like those generated by optical or magnetic GMR, AMR or Hall position sensors, for example. Both decimal and binary resolutions of up to 8,192 angle steps per signal period can be set; these can be output as an absolute value via a BiSS/SSI Interface at clock rates of up to 10 MHz and at the same time incrementally as encoder quadrature signals with A/B and an index Z. A signal conditioning unit is integrated to correct typical sensor errors; this unit intercepts the analog signal path via several D/A converters. As iC-NQC can compensate for offset, amplitude and phase errors, interpolation results are considerably improved, with an accuracy of 10 bits or an angle error of +/- 0.35° maximum per signal period. Binary resolutions of between 8 and 8,192 angle steps or decimal resolutions from 25 to 2,000 angle steps can be selected. For incremental output, the maximum tracking rate and minimum transition distance can be stipulated; for the output of an absolute angle via the serial interface an automatic resolution adaptation feature can be activated in order to trail high input frequencies of up to 250 kHz. A scalable 24-bit period counter also enables signal periods to be tracked. An integrated I2C interface provides access to an external EEPROM with 2 to 16kbit that can store the CRC-checked configuration and ca. 1 kilobyte for other application data. On startup iC-NQC automatically reads the setup and checks the CRC or waits for the configuration via the BiSS-interface.
With a single supply of +5 V the device operates within the industrial operating temperature range of -20 to +85°C, and optional from -40 to +125°C and has a space-saving 20-pin TSSOP, 6.4 x 6.4 mm package. The iC-NQC (-20 to +85°C) is in production and available at $7.65 each, in 1000pcs quantities. |
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A new ready-to-operate evaluation board is now available for high-resolution, 3-channel sine-to-digital converter iC-MN. It can be connected up to Hall or magnetoresistive angle sensors, or photosensor arrays in optical encoders. Plug-in sockets ease the testing of application-specific wiring using optional components. High-precision SAR converter iC-MN resolves phase angles from sine/cosine signals of up to 13 bits and has an excellent angle accuracy of typically 0.1 degrees.
iC-MFL is a monolithically integrated, 8-channel level shifter to drive Logic FETs. The internal circuit blocks have been designed in such a way that with single errors, such as open pins or the short-circuiting of two outputs, the iC-MFL output stages switch to a predefined, safe state. Externally connected FETs therefore shut down safely in the event of a single error. The device is now qualified for typical SIL/ASIL applications according to AEC Q100
iC-MZ is an integrated device consisting of a differential Hall switch with back-end complementary line drivers. The two integrated Hall sensors are set 2 mm apart and sense the difference in magnetic field. Magnetic DC fields are not evaluated; this means that besides the direct scanning of magnetic pole wheels with an additional bias magnet ferromagnetic gear wheels can also be detected. The magnetic input frequencies range from DC to 40 kHz. Magnetic DC fields of up to 500 mT are tolerated.
Chip incremental encoder for motor commutation and way or angle measurement
The open source BiSS interface asserted in the bidirectional communication for automation, worldwide and vendor independent. New social media platforms in the web 2.0 demonstrate the ideal platform for intensive communication and networking of BiSS users. Corresponding accounts on Facebook, Twitter and YouTube have been established, RSS feeds are subscribable.
iC-MQ's universal signal conditioning facility is suitable for optical and magnetic linear and angle sensors. For the very first time, outstanding diagnostic features are now available. Operational errors, such as signal loss or clipping, exceeding a preset operating temperature range or RPM speed and - as a totally new feature - a line count error of the scale or disc pattern
iC-MSB is a signal conditioner with a fault-tolerant line driver for sine/cosine sensors which are used to determine positions in linear and angular encoders, for example. Precision instrumentation amplifiers with differential current or voltage inputs are available for three channels and can be set independently with regard to amplification, offset and phase correction. An integrated controller supplies the sensor with power and ensures that the chip's output levels are stabilized to 1Vpp exactly. At the same time the finely adjustable calibration parameters permit an utmost degree of accuracy during the ensuing interpolation process.
Innovation through experience indicates the cooperation between iC-Haus and Dr. Wolfgang Huber, founder of the new LED and LASER design and support center "Chips4Light".
