Called the LTC5589, the part is powered by a supply in the range from 2.7V to 3.6V and draws 29.5mA, said to be 50% lower than other solutions. The modulator has a sideband suppression performance of -50dBc and typical carrier leakage of -43dBm. Sideband and carrier suppression can be improved using on chip tuning capabilities to better than -60dBc and -60dBm respectively.
With a noise floor of -158.8dBm/Hz, the LTC5589 supports narrowband and wideband transmission. Its baseband bandwidth extends to 92MHz with ±1dB gain flatness, providing 184MHz RF bandwidth at 1.8GHz.
The LTC5589 features on-chip tuning of the I- and Q-channel phase and amplitude mismatch. It also has DC offset balance adjustment and built in calibration capability via the serial port, which also enables gain to be set. Available in a 4 x 4mm plastic QFN, the LTC5589 is specified to operate in temperatures ranging from -40 to 105°C.
