Overview
The AD9520-0BCPZ is a high-performance clock generator and fanout distribution IC designed by Analog Devices Inc. This component is part of the AD9520 family and is renowned for its advanced clock distribution capabilities, featuring subpicosecond jitter performance and a wide VCO tuning range. The AD9520-0BCPZ integrates a phase-locked loop (PLL) and an on-chip VCO that tunes from 2.53 GHz to 2.95 GHz, with the option to use an external 3.3 V/5 V VCO/VCXO up to 2.4 GHz. It supports various reference inputs, including CMOS, LVDS, and LVPECL, and offers automatic/manual reference holdover and switchover modes. The device is packaged in a 64-lead LFCSP and operates from a single 3.3 V supply, with an operating temperature range of -40°C to +85°C.
Key Specifications
| Parameter | Value | Unit | Comments |
|---|---|---|---|
| Package | 64-VFQFN Exposed Pad, CSP | - | Surface Mount |
| Supply Voltage | 3.135 V ~ 3.465 V | V | Single supply |
| Operating Temperature | -40°C ~ +85°C | °C | Industrial range |
| VCO Frequency Range | 2.53 GHz ~ 2.95 GHz | GHz | On-chip VCO |
| External VCO/VCOXO Frequency | Up to 2.4 GHz | GHz | Optional external VCO/VCXO |
| Reference Input Frequency | 16.62 MHz ~ 33.3 MHz (crystal), up to 250 MHz (CMOS, LVDS, LVPECL) | MHz | Differential or single-ended |
| Output Type | LVPECL, CMOS | - | 12 LVPECL outputs, configurable as 24 CMOS outputs |
| Output Frequency | Up to 1.6 GHz (LVPECL), up to 250 MHz (CMOS) | GHz/MHz | - |
| Output Jitter | As low as 225 fs rms | fs | Additive output jitter |
| Channel-to-Channel Skew | < 16 ps | ps | Grouped outputs |
Key Features
- Low Phase Noise and Jitter: The AD9520-0BCPZ offers subpicosecond jitter performance, making it suitable for high-performance applications.
- Integrated PLL and VCO: On-chip VCO tunes from 2.53 GHz to 2.95 GHz, with the option for an external 3.3 V/5 V VCO/VCXO up to 2.4 GHz.
- Flexible Reference Inputs: Accepts CMOS, LVDS, or LVPECL references up to 250 MHz and crystal references from 16.62 MHz to 33.3 MHz.
- Reference Monitoring and Switchover: Automatic/manual reference holdover and switchover modes with glitch-free switchover and automatic recovery from holdover.
- Output Configuration: 12 LVPECL outputs in four groups, each group of three outputs sharing a 1-to-32 divider with phase delay. Outputs can be reconfigured as two 250 MHz CMOS outputs.
- Serial Interface: Supports both SPI and I²C ports with an in-package EEPROM for storing user-defined register settings.
- Power Supply Flexibility: Separate output driver power supply from 2.375 V to 3.465 V, with the external VCO operating up to 5.5 V.
Applications
- Low Jitter, Low Phase Noise Clock Distribution: Ideal for applications requiring high clock stability.
- SONET, 10Ge, 10GFC, Synchronous Ethernet, OTU2/3/4: Supports various telecommunications standards.
- Forward Error Correction (G.710): Used in error correction mechanisms.
- Clocking High-Speed ADCs, DACs, DDSs, DDCs, DUCs, MxFEs: Suitable for high-speed data conversion and signal processing.
- High-Performance Wireless Transceivers: Used in advanced wireless communication systems.
- ATE and High-Performance Instrumentation: Employed in automated test equipment and high-performance measurement instruments.
- Broadband Infrastructures: Used in various broadband communication infrastructure applications.
Q & A
- What is the primary function of the AD9520-0BCPZ?
The AD9520-0BCPZ is a clock generator and fanout distribution IC, designed to provide high-performance clock signals with low jitter and phase noise.
- What is the frequency range of the on-chip VCO in the AD9520-0BCPZ?
The on-chip VCO tunes from 2.53 GHz to 2.95 GHz.
- What types of reference inputs does the AD9520-0BCPZ support?
The AD9520-0BCPZ accepts CMOS, LVDS, or LVPECL references up to 250 MHz and crystal references from 16.62 MHz to 33.3 MHz.
- How many LVPECL outputs does the AD9520-0BCPZ have, and how can they be configured?
The AD9520-0BCPZ has 12 LVPECL outputs in four groups. Each group of three outputs can be configured as two 250 MHz CMOS outputs.
- What is the additive output jitter of the AD9520-0BCPZ?
The additive output jitter is as low as 225 fs rms.
- Does the AD9520-0BCPZ support serial communication interfaces?
Yes, it supports both SPI and I²C ports with an in-package EEPROM for storing user-defined register settings.
- What is the operating temperature range of the AD9520-0BCPZ?
The operating temperature range is from -40°C to +85°C.
- Can the AD9520-0BCPZ use an external VCO/VCXO?
Yes, it can use an external 3.3 V/5 V VCO/VCXO up to 2.4 GHz.
- What are some common applications of the AD9520-0BCPZ?
Common applications include low jitter clock distribution, SONET, 10Ge, 10GFC, synchronous Ethernet, OTU2/3/4, forward error correction, high-speed ADCs/DACs, wireless transceivers, ATE, and broadband infrastructures.
- What package type is the AD9520-0BCPZ available in?
The AD9520-0BCPZ is available in a 64-lead LFCSP (Lead Frame Chip Scale Package) with an exposed pad.
