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 Nonius scale computations (after Vernier) can be configured for the calculation of high resolution angle positions; these computations permit angle resolutions of up to 25 bits.

The absolute angle position is output via the serial BiSS Interface with clock rates of up to 10 Mbit/s. The RS422 transceiver required to this end is integrated on the chip.

Features:

• 3-Ch. simultaneous sampling 13 bit sine-to-digital conversion.
• 2 – and 3-track Nonius scale computation (after Vernier).
• Reduced conversion times due to internal flash counter.
• Synchronization of multiturn sensors via on-chip BiSS master.
• Differential PGA inputs, single-ended signal capable.
• Selectable input resistance permits voltage or current signals.
• Signal conditioning for offset, amplitude and phase.
• Short-circuit-proof RS422 drive to 10 Mbit/s for BiSS data line.
• SSI data output formats selectable.
• Short-circuit-proof sine/cosine output drivers (1 Vpp to 100 Ω).
• Signal level controllers for direct supply of encoder LEDs and MR bridges.
• Configurable system monitoring and alarm indication.
• Position preset function.
• Device setup from serial EEPROM and BiSS.
• Full reverse polarity protection including the sub-system.
• Immune against faulty output or supply connections.

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