PI (Physik Instrumente) L.P. has introduced the E-709, a piezo nanopositioning controller that provides digital functionality in the size of a paperback for the price of analog. Fifth-order polynomial digital linearization ensures higher accuracy than analog, and two notch filters allow faster response and piezo operation at higher frequencies. A fast servo update rate also ensures responsiveness. The digital-to-analog converter in-the-loop architecture guarantees positional stability. The system is supplied with USB, RS-232, real-time analog and transistor-transistor logic high-speed interfaces, and easy-to-install software for remote access and servo tuning. Applications include bio-, nano- and semiconductor technology, and lithography and optics.