3-Channel, Simultaneous Sampling 13-Bit Sin/Cos Interpolation IC with Nonius Calculation

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Encoder device iC-MN is a 3-channel, simultaneous sampling sine-to-digital converter which interpolates sine/cosine sensor signals using a high precision SAR converter with a selectable resolution of up to 13 bits.  Each input has a separate sample-and-hold stage which halts the track signal for the subsequent sequential digitization. Various 2- and 3-track Vernier scale computations (after Nonius) can be configured for the calculation of high resolution angle positions; these computations permit angle resolutions of up to 25 bits.


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3 chan. simultaneous sampling 13 bit sine-to-digital conversion
Differential and single-ended PGA inputs to 200 kHz
Input adaptation to current or voltage signals
Adjustable signal conditioning for offset, amplitude and phase
Input signal stabilization by LED or MR bridge supply tracking (via controlled 50 mA and 2 x 10 mA highside sources)
2 or 3 track nonius calculation of up to 25 bit singleturn position
Data update within 7 μs supported by flash period counting
Serial 2-wire interface to multiturn sensors (BiSS, SSI, 2-bit)
Fast, serial I/O interface with fail-safe RS422 transceiver (SSI to 4 MHz, BiSS C to 10 MHz)
Differential 1 Vpp sin/cos outputs to 100 Ohm, short-circuit-proof
Position preset function, selectable up/down code direction
Signal and system monitoring with configurable error/warning messaging and diagnosis memory
Device setup via I/O interface (BiSS) or serial EEPROM
Reverse-polarity-proof and tolerant against faulty output wiring
Power-good switch protecting the peripheral circuitry
Single 5 V supply, operation from -40 to +95 (+110) C