PI (Physik Instrumente) L.P. (Auburn, MA) announced a 4-channel version of the E- 727 digital piezo controller that is designed for multi-axis nanopositioning applications. The controller features a choice of digital high-speed interfaces such as SPI, Ethernet, and USB (and traditional RS-232), and provides three additional high-resolution analog inputs. Other features are low-noise 20-bit DAC and ADC converters, four integrated piezo power amplifiers with an output range of -30 to +130V, and circuitry for capacitive feedback sensors, piezoresistive sensors, and traditional strain gauges. The digital servo provides PID control with two programmable notch filters for higher bandwidth by suppression of mechanical system resonances. A data recorder for high-speed tracing, ID chip compatibility for quick startup, and exchange of system components without recalibration are provided.
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