The LTC5599 I/Q modulator operates from a single 2.7V to 3.6V supply, draws 28 mA, and boasts a native -52.6 dBc sideband suppression and -51.5 dBm carrier leakage without calibration. With on-chip calibration resources, performance can be further improved to -60 dBc and -65 dBm, respectively. Additionally, the device output achieves a noise floor of -156 dBm/Hz with an OIP3 of 20.8 dBm. Gain can be set via the on-chip serial port and a coarse gain control provides 1 dB/step, along with adjustable fine gain control of 0.1 dB. Total gain ranges from -19 dB to 0 dB. Varying the modulator gain enables device supply current from 8 mA to 35 mA. Once set, the gain can be automatically temperature compensated by activating the on-chip temperature correction feature. The LTC5599 supports narrowband and wideband radio applications. Its I and Q inputs are each capable of -1dB modulation bandwidth of up to 37 MHz, supporting a total of 74 MHz RF bandwidth at 900 MHz. The LTC5599 is available in a 4 mm x 4 mm QFN package. Price starts at $4.45 each/1,000. A datasheet is available at http://cds.linear.com/docs/en/datasheet/5599f.pdf
Linear Technology Corp.