I/Q modulator draws 60% less current than average

-52.6dBc sideband suppression and -51.5dBm carrier leakage is delivered by the LTC5599, without calibration. Performance can be further improved to -60dBc and -65dBm respectively, with on-chip calibration resources. The modulator also features a noise floor of -156dBm/Hz with an OIP3 of 20.8dBm, providing superior transmitter performance. I and Q inputs capable of -1dB modulation bandwidth of up to 37MHz are also offered.

Gain, which can be set using the LTC5599's on-chip serial port, ranges from -19 to 0dB. 1dB/step is provided by a coarse gain control, along with adjustable fine gain control of 0.1dB. By varying the modulator gain a supply current from 8-35mA is enabled, allowing the device to be set to lower power consumption with slightly reduced gain and performance. When set, the gain can be automatically temperature compensated by activating the on-chip temperature correction feature.

Available in a 4x4mm QFN package, the LTC5599 provides a compact footprint. With an operating temperature range from -40 to +105°C, the modulator is suitable for use in extended temperature environments. An enable control pin allows the device to be conveniently shut down. When disabled, the modulator conserves power by drawing a typical of 0.7µA standby current. 

To suit a wide range of demanding battery-powered radios and wireless communications applications, the modulator combines low power consumption and robust performance. Such applications include wireless professional microphones, frequency hopping narrowband and broadband portable field radios. To support these applications, the device features I and Q inputs capable of -1dB modulation bandwidth of up to 37MHz. Prices for the device start at $4.45 each, in 1,000-pieces quantities.