Programmable integrated circuit GC-IP201(B)

analoginterpolationmulti-channel

The interpolation circuits GC-IP201 and GC-IP201B are used to increase the resolution for incremental position and angle measuring systems with sinusoidal output signals. The signals from these incremental sensors are subjected to an internal gain and offset control patented by AMAC and then interpolated up to 256 times. The IC contains three instrumentation amplifiers to which sensors with voltage interfaces and measuring bridges can be connected directly. Sensors with a current interface or photodiode arrays are adapted using simple external wiring. An adjustable analog low-pass filter reduces the noise of the sensor signals. In addition, a digital hysteresis can suppress the edge noise of the output signals at low input frequencies and at standstill. In the IC, the signal quality of the sensors is monitored using nine criteria. The four implemented output interfaces ABZ, SPI, SSI, BiSS (only GC-IP201B) and other features such as multi-level trigger signal processing, integrated timer, integrated multiturn counter, the evaluation of distance-coded reference marks, which allow options for adjusting the reference point and for setting and saving the zero position the direct use of the IC on industrial controls or on very fast multi-channel position measuring systems. The IC is also prepared for use in absolute position measuring systems. • Interpolation rate 20 ... 256 • Output signals: ABZ, SPI, SSI, BiSS (GC-IP201B) • Input frequency max. 440 kHz - • EEPROM, multiturn counter, reference mark adjustment • Adjustable input low pass filter 10kHz...450kHz