News Release

Evaluation board MN1D with high-resolution 3-channel sine interpolation 04.10.2010
Simultaneous sampling, 3-channel sine interpolation with a BiSS interface in eurocard format
MN1D Web-Motiv
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.

Both the gain and the offset and phase correction of the integrated instrumentation amplifiers can be set separately for each of the three channels, enabling differential or referenced input signals. At the same time, the inputs can either be configured as high impedance for voltage signals from magnetic resistor bridges, for example, or switched to low impedance for the connection of photosensors that produce current signals. This thus permits the direct connection of various optical and magnetic sensors.

Each channel has a separate sample-and-hold stage that halts the signal for subsequent sequential digitization. The absolute angle value is output via the integrated serial 2-wire interface in SSI or BiSS C protocol at clock frequencies of up to 10 MHz. The RS422 transceiver required for this purpose is also integrated on chip iC-MN, so that the tiny QFN component, just 7 mm by 7 mm, takes up very little space.

What's new on iC-MN is its configurable nonius calculation that can use two or three signals to compute high-resolution angle positions, thus enabling singleturn position values of up to 25 bits – provided suitable input signals are present, such as those generated by optical encoder sensor iC-PN2656.

An additionally integrated serial interface can retrieve position values from multiturn sensors and combine them to create a position value of up to 49 bits. To this end, the MN1D evaluation board has a separate D-sub connector which a second board can be docked on to.

Various BiSS PC adapters are available for the operation of the evaluation board; a PC operating program is also provided free of charge. Customer programming of operational equipment is simplified by the component DLL included here.
Product iC-MN
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