Microwave Wideband Synthesizer
with Integrated VCO
RF output frequency range: 54 MHz to 13,600 MHz
Fractional-N synthesizer and integer-N synthesizer
High resolution 38-bit modulus
Phase frequency detector (PFD) operation to 125 MHz
Reference frequency operation to 600 MHz
Maintains frequency lock over −40°C to +85°C
Low phase noise, voltage controlled oscillator (VCO)
Programmable divide by 1, 2, 4, 8, 16, 32, or 64 output
Analog and digital power supplies: 3.3 V
Charge pump and VCO power supplies: 5 V, typical
Logic compatibility: 1.8 V
Programmable dual modulus prescaler of 4/5 or 8/9
Programmable output power level
RF output mute function
Analog and digital lock detect
Supported in the ADIsimPLL design tool
Wireless infrastructure (W-CDMA, TD-SCDMA,
WiMAX, GSM, PCS, DCS, DECT)
Point to point/point to multipoint microwave links
The ADF5355 allows implementation of fractional-N or
integer-N phase-locked loop (PLL) frequency synthesizers
when used with an external loop filter and an external reference
frequency. The wideband microwave VCO design permits
frequency operation from 6.8 GHz to 13.6 GHz at one radio
frequency (RF) output. A series of frequency dividers at another
frequency output permits operation from 54 MHz to 6800 MHz.
The ADF5355 has an integrated VCO with a fundamental
output frequency ranging from 3400 MHz to 6800 MHz. In
addition, the VCO frequency is connected to divide by 1, 2, 4, 8,
16, 32, or 64 circuits that allow the user to generate RF output
frequencies as low as 54 MHz. For applications that require
isolation, the RF output stage can be muted. The mute function
is both pin and software controllable.
Control of all on-chip registers is through a simple 3-wire interface.
The ADF5355 operates with analog and digital power supplies
ranging from 3.15 V to 3.45 V, with charge pump and VCO
supplies from 4.75 V to 5.25 V. The ADF5355 also contains
hardware and software power-down modes.
FUNCTIONAL BLOCK DIAGRAM
VP RSET VVCO
INTEGER FRACTION MODULUS
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