LTC5599 Datasheet | Linear Technology

Features n n n n n n LTC5599 30MHz to 1300MHz Low Power Direct Quadrature Modulator Description The LTC®5599 is a direct conversion I/Q modulator designed for low power wireless applications that enable direct modulation of differential baseband I and Q signals on an RF carrier. Single side-band modulation or side-band suppressed upconversion can be achieved by applying 90° phase-shifted signals to the I and Q inputs. The I/Q baseband input ports can be either AC or DC coupled to a source with a mon mode voltage level of about 1.4V. The SPI interface controls the supply current, modulator gain, and allows optimization of the LO carrier feedthrough and side-band suppression, with sine wave or square wave LO drive. A fixed LC network on the LO and RF ports covers a continuous 90MHz to 1300MHz operation. An on-chip thermometer can be activated to pensate for gain-temperature variations. More accurate temperature measurements can be made using an on-chip diode. In addition, a continuous analog gain control (VCTRL) pin can be used for fast power control. L, LT, LTC, LTM, Linear Technology, and the Linear logo are registered trademarks and Quik Eval is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Frequency Range: 30MHz to 1300MHz Low Power: 2.7V to 3.6V Supply; 28m A Low LO Carrier Leakage: - 51.5d Bm at 500MHz Side-Band Suppression: - 52.6d Bc at 500MHz Output IP3: 20.8d Bm at 500MHz Low RF Output Noise Floor: - 156d Bm/Hz at 6MHz Offset, PRF = 3d Bm n Sine Wave or Square Wave LO Drive n SPI Control: Adjustable Gain: - 19d B to 0d B in 1d B Steps Effecting Supply Current from 8m A to 35m A I/Q Offset Adjust: - 65d Bm LO Carrier Leakage I/Q Gain/Phase Adjust: - 60d Bc Side-Band Suppressed n24-Lead QFN 4mm × 4mm Package Applications n n n n n n Wireless Microphones Battery Powered Radios Ad-Hoc Wireless Infrastructure Networks “White-Space” Transmitters Software Defined Radios (SDR)...