Overview
The ADF4155BCPZ from Analog Devices Inc. is a high-performance integer-N/fractional-N phase-locked loop (PLL) frequency synthesizer. This device is designed to be used with an external loop filter, external voltage-controlled oscillator (VCO), and external reference frequency to implement fractional-N or integer-N PLL frequency synthesizers. It supports VCO operating frequencies up to 8 GHz and offers a high resolution 38-bit programmable modulus, enabling the synthesis of exact frequencies with 0 Hz error. The ADF4155BCPZ operates with a nominal power supply of 3.3 V ± 5% and features a simple 3-wire serial interface for control of all on-chip registers.
Key Specifications
| Parameter | Value | Unit | Comments |
|---|---|---|---|
| Input Frequency Range | 500 MHz to 8000 MHz | ||
| Phase Frequency Detector (PFD) | Up to 125 MHz | ||
| Programmable Modulus | 38-bit | High resolution | |
| Power Supply | 3.3 V ± 5% | V | Nominal |
| Logic Compatibility | 1.8 V | V | |
| Operating Temperature | -40°C to +85°C | °C | |
| Package Style | 24-lead LFCSP (4 mm × 4 mm) | ||
| Reference Input | Differential and single-ended | ||
| Output Power Level | Programmable | ||
| Lock Detect | Analog and digital |
Key Features
- Fractional-N and integer-N synthesizer capabilities
- High resolution 38-bit programmable modulus for exact frequency synthesis with 0 Hz error
- Separate charge pump supply (VP) allows extended tuning voltage in 5 V systems
- Differential and single-ended reference inputs
- Programmable dual-modulus prescaler (P) of 4/5 or 8/9
- Programmable output power level
- Analog and digital lock detect
- Simple 3-wire serial interface for control
- VCO frequency can be divided by 1, 2, 4, 8, 16, 32, or 64 to generate RF output frequencies as low as 7.8125 MHz
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
Q & A
- What is the input frequency range of the ADF4155BCPZ?
The input frequency range is 500 MHz to 8000 MHz. - What is the maximum frequency of the phase frequency detector (PFD)?
The PFD can operate up to 125 MHz. - What is the resolution of the programmable modulus?
The programmable modulus has a high resolution of 38 bits. - What is the nominal power supply voltage for the ADF4155BCPZ?
The nominal power supply voltage is 3.3 V ± 5%. - What types of reference inputs does the ADF4155BCPZ support?
The device supports both differential and single-ended reference inputs. - Can the output power level be programmed?
Yes, the output power level is programmable. - What types of lock detect does the ADF4155BCPZ offer?
The device offers both analog and digital lock detect. - How is the control of all on-chip registers achieved?
Control of all on-chip registers is through a simple 3-wire serial interface. - What are the possible divisions for the VCO frequency?
The VCO frequency can be divided by 1, 2, 4, 8, 16, 32, or 64. - What is the operating temperature range of the ADF4155BCPZ?
The operating temperature range is -40°C to +85°C.
