ADRF6755 Datasheet | Analog Devices

FEATURES I/Q modulator with integrated fractional-N PLL and VCO Gain control span: 47 d B in 1 d B steps Output frequency range: 100 MHz to 2400 MHz Output 1 d B pression: 8 d Bm at LO = 1800 MHz Output IP3: 20.5 d Bm at LO = 1800 MHz Noise floor: - 161 d Bm/Hz at LO = 1800 MHz Baseband modulation bandwidth: 600 MHz (3 d B) Output frequency resolution: 1 Hz SPI and I2C-patible serial interfaces Power supply: 5 V/380 m A GENERAL DESCRIPTION The ADRF6755 is a highly integrated quadrature modulator, frequency synthesizer, and programmable attenuator. The device covers an operating frequency range from 100 MHz to 2400 MHz for use in satellite, cellular, and broadband munications. The ADRF6755 modulator includes a high modulus, fractional-N frequency synthesizer with integrated VCO, providing less than 1 Hz frequency resolution, and a 47 d B digitally controlled output attenuator with 1 d B steps. Control of all the on-chip registers is through a user-selected SPI interface or I2C interface. The device operates from a single power supply ranging from 4.75 V to 5.25 V. REGOUT VREG1 VREG2 VREG3 VREG4 VREG5 VREG6 RFOUT VCC1 VCC2 VCC3 VCC4 3.3V REGULATOR 47d B GAINCONTROL RANGE 0°/90° RFDIVIDER TXDIS VCO CORE LOMON LOMON REFIN REFIN SDI/SDA CLK/SCL SDO CS ×2 DOUBLER SPI/I2C INTERFACE 5-BIT DIVIDER ÷2 + PHASE FREQUENCY - DETECTOR THIRD-ORDER FRACTIONAL INTERPOLATOR N-COUNTER FRACTIONAL MODULUS REGISTER INTEGER REGISTER AGND DGND Figure 1. REFERENCE CHARGE...