LTC5599IUF#PBF

LTC5599 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 common mode voltage level of about 1.4V. The SPI interface controls the supply current, modulator gain, and allows optimization of the LO carrier feed through 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 compensate for gain-temperature variations. It is used in applications like wireless microphones, battery powered radios, Ad-Hoc wireless infrastructure networks, “White-Space” transmitters, software defined radios (SDR), military radios.

• Frequency range from 30MHz to 1300MHz
• Signal powers at 2xLO is -51dBc typical at (max of 2fLO – 2fBB; 2fLO – fBB; 2fLO + fBB)
• Side-band suppression is -52.6dBc typ at (TC = 25°C, VCC = 3.3V)
• Output 3rd order intercept is 20.8dBm typ at (TC = 25°C, VCC = 3.3V)
• RF output noise floor is -156.7dBm/Hz typ at (TC = 25°C, VCC = 3.3V)
• Sine wave or square wave LO drive
• I/Q offset adjust is -65dBm LO carrier leakage
• I/Q gain/phase adjust is -60dBc side-band suppressed
• Adjustable gain is -19dB to 0dB in 1dB steps effecting supply current from 8mA to 35mA
• Operating temperature range from -40°C to 105°C, package style is 24-lead plastic QFN

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party