آی سی ADF4351 یک سینتی سایزر دیجیتال با پهنای باند وسیع به همراه یک VCO داخلی با قابلیت تولید سیگنال از فرکانس 35 مگاهرتز تا 4400 مگاهرتز با قابلیت برنامه ریزی 3 سیمه می باشد.
GENERAL DESCRIPTION
The ADF4351 allows implementation of fractional-N or integer-N phase-locked loop (PLL) frequency synthesizers when used with an external loop filter and external reference frequency.
The ADF4351 has an integrated voltage controlled oscillator (VCO) with a fundamental output frequency ranging from 2200 MHz to 4400 MHz. In addition, divide-by-1/-2/-4/-8/-16/-32/-64 circuits allow the user to generate RF output frequencies as low as 35 MHz. For applications that require isolation, the RF output stage can be muted. The mute function is both pin- and software-controllable. An auxiliary RF output is also available, which can be powered down when not in use.
Control of all on-chip registers is through a simple 3-wire interface. The device operates with a power supply ranging from 3.0 V to 3.6 V and can be powered down when not in use.
FEATURES
Output frequency range: 35 MHz to 4400 MHz
Fractional-N synthesizer and integer-N synthesizer
Low phase noise VCO
Programmable divide-by-1/-2/-4/-8/-16/-32/-64 output
Typical jitter: 0.3 ps rms
Typical EVM at 2.1 GHz: 0.4%
Power supply: 3.0 V to 3.6 V
Logic compatibility: 1.8 V
Programmable dual-modulus prescaler of 4/5 or 8/9
Programmable output power level
RF output mute function
3-wire serial interface
Analog and digital lock detect
Switched bandwidth fast lock mode
Cycle slip reduction
APPLICATIONS
Wireless infrastructure (W-CDMA, TD-SCDMA, WiMAX, GSM, PCS, DCS, DECT)
Test equipment
Wireless LANs, CATV equipment
Clock generation