Overview
The ADF4355-3BCPZ from Analog Devices Inc. is a highly versatile microwave wideband synthesizer designed for a wide range of RF and microwave applications. This device integrates a voltage-controlled oscillator (VCO) and supports both fractional-N and integer-N phase-locked loop (PLL) frequency synthesizers. It is used in conjunction with an external loop filter and an external reference frequency to generate precise RF output frequencies.
The ADF4355-3 features a fundamental VCO output frequency range of 3300 MHz to 6600 MHz, which can be divided by 1, 2, 4, 8, 16, 32, or 64 to achieve lower RF output frequencies down to 51.5625 MHz. The device is controlled via a simple 3-wire serial interface and includes features such as RF output mute, analog and digital lock detect, and programmable output power levels.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| VCO Frequency Range | 3300 | 6600 | MHz | Fundamental VCO range | |
| RF Output Frequency | 51.5625 | 6600 | MHz | ||
| VCO Sensitivity | 63 | MHz/V | |||
| Frequency Pushing (Open-Loop) | 22 | MHz/V | |||
| Frequency Pulling (Open-Loop) | 0.54 | MHz | VSWR = 2:1 | ||
| Harmonic Content (Second) | -27 | dBc | Fundamental VCO output (RFOUTA+) | ||
| Harmonic Content (Third) | -20 | dBc | Divided VCO output (RFOUTA+) | ||
| Power Supplies | 3.1515 | 3.3 | 3.4485 | V | Analog, digital, charge pump, and VCO power supplies |
| Logic Compatibility | 1.8 V |
Key Features
- Fractional-N and integer-N phase-locked loop (PLL) frequency synthesizers
- Integrated VCO with a fundamental output frequency range of 3300 MHz to 6600 MHz
- Programmable divide by 1, 2, 4, 8, 16, 32, or 64 output
- Programmable dual modulus prescaler of 4/5 or 8/9
- Programmable output power level
- RF output mute function, both pin- and software-controllable
- Analog and digital lock detect
- 3-wire serial interface for control of all on-chip registers
- Hardware and software power-down modes
Applications
- Wireless infrastructure (W-CDMA, TD-SCDMA, WiMAX, GSM, PCS, DCS, DECT)
- Point to point/point to multipoint microwave links
- Satellites/VSATs
- Test equipment/instrumentation
- Clock generation
Q & A
- What is the fundamental VCO frequency range of the ADF4355-3?
The fundamental VCO frequency range is from 3300 MHz to 6600 MHz.
- What are the possible division factors for the VCO output?
The VCO output can be divided by 1, 2, 4, 8, 16, 32, or 64.
- What is the range of RF output frequencies achievable with the ADF4355-3?
The RF output frequency range is from 51.5625 MHz to 6600 MHz.
- How is the ADF4355-3 controlled?
The device is controlled via a simple 3-wire serial interface.
- What power supply voltages does the ADF4355-3 operate with?
The device operates with power supplies ranging from 3.1515 V to 3.4485 V.
- Does the ADF4355-3 have power-down modes?
Yes, it has both hardware and software power-down modes.
- What is the logic compatibility of the ADF4355-3?
The logic compatibility is 1.8 V.
- What are some of the key applications of the ADF4355-3?
Key applications include wireless infrastructure, point to point/multipoint microwave links, satellites/VSATs, test equipment/instrumentation, and clock generation.
- Does the ADF4355-3 have an RF output mute function?
Yes, the RF output mute function is both pin- and software-controllable.
- How can the output power level of the ADF4355-3 be controlled?
The output power level is programmable.
