The DC795A demo circuit board is intended to demonstrate the capabilities of the LT5527 highsignal- level downconverting mixer IC for cable and wireless infrastructure applications. The LT5527 (Figure 1) is a broadband high signal level active mixer optimized for high linearity downconverter receiver/transmitter applications for cable and wireless infrastructure. The IC includes a high-speed differential LO buffer amplifier driving a double-balanced mixer. The LO buffer is internally 50ohm-matched for wideband, single-ended operation with no external components. The LT5527 IC’s RF input port incorporates an integrated transformer and is internally matched to 50ohms over the 1.7GHz to 2.7GHz frequency range. The RF input match can be shifted down to 400MHz, or up to 3.7GHz, with a single shunt capacitor or inductor, respectively. The high level of integration minimizes the total solution cost, board space and system-level variation. The LT5527 delivers high performance and small size without excessive power consumption. The DC795A demo board allows evaluation of the LT5527 downconverting mixer IC for various receiver and transmitter applications. Its RF input is optimized for 1.7GHz to 2.7GHz frequency range. The IF output frequency range is centered at 240MHz. The LO is internally matched for range of frequencies from 1200MHz to 4000MHz.