ADRF6755ACPZ-R7 datasheet(1/48 Pages) AD

Part #	ADRF6755ACPZ-R7

Description	100 MHz to 2400 MHz I/Q Modulator with Integrated Fractional-N PLL and VCO

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100 MHz to 2400 MHz I/Q Modulator

with Integrated Fractional-N PLL and VCO

Data Sheet

ADRF6755

Rev. B

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FEATURES

I/Q modulator with integrated fractional-N PLL and VCO

Gain control span: 47 dB in 1 dB steps

Output frequency range: 100 MHz to 2400 MHz

Output 1 dB compression: 8 dBm at LO = 1800 MHz

Output IP3: 20.5 dBm at LO = 1800 MHz

Noise floor: −161 dBm/Hz at LO = 1800 MHz

Baseband modulation bandwidth: 600 MHz (3 dB)

Output frequency resolution: 1 Hz

SPI and I2C-compatible serial interfaces

Power supply: 5 V/380 mA

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 communications.

The ADRF6755 modulator includes a high modulus, fractional-N

frequency synthesizer with integrated VCO, providing less than

1 Hz frequency resolution, and a 47 dB digitally controlled output

attenuator with 1 dB 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.

Figure 1.

RSET

CS

TXDIS

DGND

AGND

×2

DOUBLER

5-BIT

DIVIDER

REFERENCE

CURRENT SETTING

REFIN

÷2

PHASE

FREQUENCY

DETECTOR

+

–

RFDIVIDER

VCO

CORE

0°/90°

REGOUT

VCC1

VCC2

VCC3

VCC4

ADRF6755

LOMON

RFOUT

47dB

GAINCONTROL

RANGE

N-COUNTER

CR9[7:4]

CP

NC

IBB

VTUNE

3.3V

REGULATOR

QBB

VREG1

VREG2

VREG3

VREG4

VREG5

VREG6

SPI/I2C

INTERFACE

SDI/SDA

CLK/SCL

SDO

CCOMP1

CCOMP2

CCOMP3

NC

LDET

CHARGE

PUMP

THIRD-ORDER

FRACTIONAL

INTERPOLATOR

FRACTIONAL

REGISTER

MODULUS

225

INTEGER

REGISTER

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