Overview
The AD9576BCPZ from Analog Devices Inc. is a highly integrated dual phase-locked loop (PLL) asynchronous clock generator. This component is designed to provide multiple output clock signals with flexible frequency translation capabilities, making it an ideal solution for systems requiring robust and precise timing. The AD9576BCPZ features two dedicated PLL cores: one fractional-N PLL for high-performance, low-jitter frequency synthesis, and one integer-N PLL for general-purpose clocks suitable for CPU and FPGA reference clocks. It is optimized for extended operating life within frequency tolerance and includes automatic switchover between redundant crystal inputs to minimize switching transients.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Input Frequency (Differential) | - | - | 325 MHz | - | Differential input mode |
| Input Frequency (Single-Ended) | - | - | 200 MHz | - | Single-ended input mode |
| VCO Range | 2375 MHz | - | 2725 MHz | - | Integrated VCO/fractional-N PLL core |
| Output Frequency | - | - | 1.25 GHz | - | Maximum output frequency |
| Supply Voltage | 2.38 V | - | 3.63 V | V | Single-supply operation |
| Operating Temperature | -40°C | - | 85°C | °C | - |
| RMS Jitter (Typical) | - | 0.313 ps | - | ps | At 644.53125 MHz output |
| Package | - | - | - | - | 64-lead WFQFN Exposed Pad |
Key Features
- Dual PLL Architecture: Features two dedicated PLL cores, one fractional-N PLL and one integer-N PLL, for flexible frequency translation and low jitter performance.
- Programmable Dividers: Integrated programmable dividers allow for flexible frequency division and output clock customization.
- Low Jitter Performance: Incorporates advanced jitter reduction techniques, such as fractional-N synthesis and noise filtering, to minimize clock jitter.
- Automatic Redundant XTAL Switchover: Monitors and automatically switches between redundant crystal inputs with minimized switching transients.
- Autonomous Operation: Can store and recall multiple pre-defined clock configurations using built-in EEPROM and configuration registers.
- Multiple Output Formats: Supports CMOS, HCSL, HSTL, and LVDS output formats.
Applications
- Telecommunications Infrastructure: Serves as a vital clocking component in network switches, routers, and base stations, ensuring accurate data synchronization and transmission.
- Ethernet Line Cards and Switches: Used in high-speed data transmission applications requiring low jitter and low phase noise clock generation.
- Baseband Units and SATA/PCI Express Systems: Provides precise timing signals for these applications, enhancing overall system performance and reliability.
- FPGA and CPU Reference Clocks: Suitable for general-purpose clocks in field-programmable gate arrays and central processing units.
Q & A
- What is the primary function of the AD9576BCPZ?
The AD9576BCPZ is a dual PLL asynchronous clock generator that provides multiple output clock signals with flexible frequency translation capabilities.
- What types of PLL cores does the AD9576BCPZ feature?
The AD9576BCPZ features one fractional-N PLL and one integer-N PLL.
- What is the maximum output frequency of the AD9576BCPZ?
The maximum output frequency is 1.25 GHz.
- What is the operating temperature range of the AD9576BCPZ?
The operating temperature range is from -40°C to 85°C.
- What types of output formats does the AD9576BCPZ support?
The AD9576BCPZ supports CMOS, HCSL, HSTL, and LVDS output formats.
- How does the AD9576BCPZ handle redundant crystal inputs?
The AD9576BCPZ monitors and automatically switches between redundant crystal inputs with minimized switching transients.
- What is the typical RMS jitter of the AD9576BCPZ at 644.53125 MHz output?
The typical RMS jitter is 0.313 ps.
- What is the package type of the AD9576BCPZ?
The package type is 64-lead WFQFN Exposed Pad.
- What are some common applications of the AD9576BCPZ?
Common applications include telecommunications infrastructure, ethernet line cards, switches, baseband units, and SATA/PCI Express systems.
- Does the AD9576BCPZ support autonomous operation?
Yes, the AD9576BCPZ can store and recall multiple pre-defined clock configurations using built-in EEPROM and configuration registers.
