The ADF4350ABCPZ allows implementation of fractional-N orinteger-N phase-locked loop (PLL) frequency synthesizersif used with an external loop filter and external referencefrequency.
The ADF4350ABCPZ has an integrated voltage controlled oscillator(VCO) with a fundamental output frequency ranging from2200 MHz to 4400 MHz. In addition, divide-by-1/2/4/8 or 16circuits allow the user to generate RF output frequencies as lowas 137.5 MHz. For applications that require isolation, the RFoutput stage can be muted. The mute function is both pin- andsoftware-controllable. An auxiliary RF output is also available,which can be powered down if not in use.
Control of all the on-chip registers is through a simple 3-wireinterface. The device operates with a power supply rangingfrom 3.0 V to 3.6 V and can be powered down when not in use.
Feature
- Output frequency range: 137.5 MHz to 4400 MHz
- Fractional-N synthesizer and integer-N synthesizer
- Low phase noise VCO
- Programmable divide-by-1/-2/-4/-8/-16 output
- Typical rms jitter: <0.4 ps rms
- 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
(Picture: Pinout)
