DC2391A, Demo Board based on LTC5589 700MHz to 6000MHz Low-Power I/Q Modulator

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• DC2391A, Demonstration Circuit is optimized for evaluation of the LTC5589 low power I/Q modulator up to 4.5GHz. For frequencies above 4.5GHz, LO matching circuit on the DC2391A demo board can be easily modified for improved image rejection performance. The four balanced I- and Q-baseband input ports can be either AC-coupled with internal bias supplied, or DC-coupled from a source with a common-mode voltage level of about +1.4V. The SPI interface is used to set internal registers which control the gain, optimum center frequency, I-offset, Q-offset and sideband suppression