iC-RC1000 monitors up to four signal lines for the correct DC voltage and the differential signal amplitude of two paired lines to see whether these remain within the specified range of 0.8 Vpp to 1.2 Vpp. An analog circuit derives the Lissajous curve from the sine and cosine signal and comparators monitor the vector length in real time. Any error indication is lengthened to at least 4 ms so that the controller can reliably detect an interrupt. The diagnostic outputs permit optocouplers to be directly connected up for galvanic isolation.
iC-RC1000 is designed for use at operating temperatures of -40 to 110°C and operates on a supply voltage of 5 V. A 1.4 mA supply is typically sufficient for the two diagnostic channels which can be supplied by either one common or two separate power supplies and which monitor one another. The device is protected against ESD and is overvoltage-proof up to 36 V at the front end thanks to an internal clamp circuit. The small, 10-pole MSOP package, just 3 mm in length and width, is available in production quantities.
