●Product Details
●The ADF4155 allows implementation of fractional-N or integer-N phase-locked loop (PLL) frequency synthesizers when used with an external loop filter, external voltage controlled oscillator (VCO), and external reference frequency.
●The ADF4155 is for use with external VCO parts up to an 8 GHz operating frequency. The high resolution programmable modulus allows synthesis of exact frequencies with 0 Hz error.
●The VCO frequency can be divided by 1, 2, 4, 8, 16, 32, or 64 to allow the user to generate RF output frequencies as low as 7.8125 MHz.
●Control of all on-chip registers is through a simple 3-wire interface. The device operates with a nominal power supply of 3.3 V ± 5% and can be powered down when not in use.
●The ADF4155 is available in a 24-lead, 4 mm × 4 mm LFCSP package.
●Applications
● Wireless infrastructure (W-CDMA, TD-SCDMA, WiMAX, GSM, PCS, DCS, DECT)
● Point to point/point to multipoint microwave links
● Test equipment
● Wireless LANs, CATV equipment
● Clock generation
●### Features and Benefits
● Input frequency range: 500 MHz to 8000 MHz
● Fractional-N synthesizer and integer-N synthesizer
● Phase frequency detector (PFD) up to 125 MHz
● High resolution 38-bit modulus
● Separate charge pump supply (VP) allows extended tuning voltage in 5 V systems
● Programmable divide by 1, 2, 4, 8, 16, 32, or 64 output
● Differential and single-ended reference inputs
● Power supply: 3.3 V ± 5%
● Logic compatibility: 1.8 V
● Programmable dual-modulus prescaler (P) of 4/5 or 8/9
● Programmable output power level
● 3-wire serial interface
● Analog and digital lock detect
