DC478B

The DC478B demo circuit board is intended to demonstrate the capabilities of the LT5512 downconverting mixer IC for 1900MHz wireless infrastructure applications. The LT5512 is a broadband high signal level mixer IC optimized for high linearity downconverter applications including wireless and cable infrastructure. The IC includes a differential LO buffer driving a double-balanced mixer. An integrated RF amplifier improves LORF isolation and eliminates the need for precision external bias resistors. The LT5512 is a high-linearity alternative to passive diode mixers. Unlike passive mixers, which have conversion loss and require high LO drive level, the LT5512 delivers conversion gain and requires significantly lower LO drive levels. The DC478B demo board downconverts 1700MHz-2100MHz RF input to 170MHz IF output. LO injection can be either high-side or low-side, ranging from 1500MHz to 2300MHz.

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