资 源 简 介
The ADRF6702 TxMod is an IQ modulator with integrated PLL and VCO. The PLL/Synthesizer uses a FracTIonal-N PLL to generate a 2*FLO input to the I-Q modulator. The PLL reference input is supported from 12MHz to 160MHz. The phase detector output controls a chargepump whose output is integrated in an off-chip loop-filter. The loop filter output is then applied to an integrated VCO. The VCO output at 2*FLO is then applied to a quadrature divider as well as to a programmable divider. The programmable divider is controlled by a sigma-delta modulator (SDM). The I-Q modulator has analog I + Q inputs which can be at baseband or opTIonally at a complex IF up to 200 MHz
