Overview
The ADF4108BCPZ is a high-performance, integer-N phase-locked loop (PLL) frequency synthesizer from Analog Devices Inc. This device is designed to provide a highly stable and accurate local oscillator signal, making it suitable for various wireless communication systems. The ADF4108 features a robust architecture that includes a phase frequency detector (PFD), a charge pump, and a programmable reference counter and N counter, allowing for flexible and precise frequency synthesis.
Key Specifications
| Parameter | Rating/Value | Unit | Test Conditions/Comments |
|---|---|---|---|
| AVDD to GND | −0.3 V to +3.9 V | V | TA = 25°C, unless otherwise noted |
| AVDD to DVDD | −0.3 V to +0.3 V | V | TA = 25°C, unless otherwise noted |
| VP to GND | −0.3 V to +5.8 V | V | TA = 25°C, unless otherwise noted |
| Digital I/O Voltage to GND | −0.3 V to VDD + 0.3 V | V | TA = 25°C, unless otherwise noted |
| Analog I/O Voltage to GND | −0.3 V to VP + 0.3 V | V | TA = 25°C, unless otherwise noted |
| Operating Temperature Range (B Version) | −40°C to +85°C | °C | |
| CLOCK High Duration | 25 ns min | ns | AVDD = DVDD = 3.3 V ± 2%, AGND = DGND = CPGND = 0 V, RSET = 5.1 kΩ |
| CLOCK Low Duration | 25 ns min | ns | AVDD = DVDD = 3.3 V ± 2%, AGND = DGND = CPGND = 0 V, RSET = 5.1 kΩ |
Key Features
- High-Performance PLL Frequency Synthesizer: The ADF4108 is designed for high accuracy and stability, making it ideal for wireless communication systems.
- Programmable Reference Counter and N Counter: Allows for flexible frequency synthesis and customization to meet specific application requirements.
- Phase Frequency Detector (PFD): Includes a programmable delay element to control the antibacklash pulse width, minimizing phase noise and reference spurs.
- Charge Pump and Multiplexer Output: Provides various internal points accessible via the output multiplexer, enhancing functionality and diagnostic capabilities.
- Fastlock Mode and Power-Down Options: Supports fastlock modes and power-down features for efficient operation and reduced power consumption).
Applications
The ADF4108BCPZ is widely used in various wireless communication systems, including:
- Local Oscillators in Up-Conversion and Down-Conversion Sections of Wireless Receivers: Its high stability and accuracy make it suitable for generating reliable local oscillator signals.
- Base Stations and Repeaters: The device's performance and flexibility are beneficial in base station and repeater applications where precise frequency synthesis is critical.
- Wireless Infrastructure Equipment: It is used in other wireless infrastructure equipment where high-performance frequency synthesis is required.
Q & A
- What is the primary function of the ADF4108BCPZ?
The primary function of the ADF4108BCPZ is to act as a high-performance integer-N phase-locked loop (PLL) frequency synthesizer for generating stable and accurate local oscillator signals in wireless communication systems. - What are the key components of the ADF4108BCPZ?
The key components include a phase frequency detector (PFD), a charge pump, and programmable reference and N counters. - What is the operating temperature range of the ADF4108BCPZ?
The operating temperature range is −40°C to +85°C for the B version. - What are the power supply requirements for the ADF4108BCPZ?
The device operates with AVDD and DVDD at 3.3 V ± 2%, and VP can range from −0.3 V to +5.8 V relative to GND. - What is the purpose of the fastlock mode in the ADF4108BCPZ?
The fastlock mode is designed to quickly lock the PLL to the desired frequency, reducing the lock time and improving system performance. - How does the ADF4108BCPZ minimize phase noise and reference spurs?
The device includes a programmable delay element in the PFD to control the antibacklash pulse width, which minimizes phase noise and reference spurs. - What types of applications is the ADF4108BCPZ typically used in?
The ADF4108BCPZ is typically used in wireless communication systems, including local oscillators in up-conversion and down-conversion sections of wireless receivers, base stations, and other wireless infrastructure equipment. - What is the significance of the output multiplexer in the ADF4108BCPZ?
The output multiplexer allows users to access various internal points on the chip, enhancing diagnostic and functional capabilities. - Can the ADF4108BCPZ be powered down to reduce power consumption?
Yes, the device supports asynchronous and synchronous power-down modes to reduce power consumption when not in use. - Where can I find detailed specifications for the ADF4108BCPZ?
Detailed specifications can be found in the datasheet available on the Analog Devices website or through distributors like Mouser Electronics and Richardson RFPD.
