The SD2004-1 is a Complex Quadrature Mixer and Synthesiser with an on-chip Reference Oscillator fabricated as a Monolithic Integrated Circuit using 0.35um Silicon Bulk CMOS, packaged in a 36 pin Quad Flat Pack plastic package.

The SD2004-1 features an all-on-chip Local Oscillator, an IQ Quad Mixer allowing upper- and lower-sideband selection with DC-2.5GHz capability on all ports, featuring dynamic Image-Reject tuning to minimising off-chip imperfections.  Calibration coefficents are retained in field programmable Non-Volatile memory.  All sections of the chip can be placed into idle-mode to minimise battery consumption.  Die temperature read-back via bidirectional I²C Bus.