Analog Devices Inc. DC2645A Evaluation Board is designed to evaluate the LTC5594 high linearity I/Q demodulator with wideband IF amplifiers. This DC2645A evaluation board features single-ended RF input, single-ended Local Oscillator (LO) input, and discrete L-C interstage lowpass filters. The DC2645A evaluation board requires USB serial controller, DC590B, to control and configure the LTC5594 amplifier for its evaluation. The discrete L-C interstage lowpass filters between the demodulator outputs and the IF amplifier inputs, limit the DC-coupled differential I and Q outputs to 1GHz. The DC2645A is capable of writing to specific registers through the SPI bus to adjust or optimize LTC5594's amplifier gain, LO input frequency, and linearity.