Overview
The AD9559BCPZ-REEL7, produced by Analog Devices Inc., is a highly advanced clock multiplier and jitter cleaner designed for various high-performance applications. This component is part of the AD9559 family and is packaged in a 72-lead Lead Frame Chip Scale Package (LFCSP). It operates over an industrial temperature range of −40°C to +85°C, making it suitable for a wide range of environments.
The AD9559 is specifically engineered to provide jitter cleanup and synchronization for systems such as synchronous optical networks (SONET/SDH), wireless base station controllers, and cable infrastructure. It supports up to four external input references and generates an output clock synchronized to these inputs, ensuring low jitter output even in the absence of reference inputs.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Operating Temperature | −40°C | +85°C | °C | Industrial temperature range | |
| Package Type | 72-Lead Lead Frame Chip Scale Package (LFCSP) | ||||
| Crystal Resonator Frequency Range | 10 MHz | 50 MHz | MHz | Fundamental mode, AT cut crystal | |
| Reference Input Frequency Range (Sinusoidal) | 10 MHz | 750 MHz | MHz | ||
| Reference Input Frequency Range (LVPECL) | 0.002 MHz | 1250 MHz | MHz | ||
| Minimum Input Slew Rate | 40 V/μs | V/μs | For jitter performance | ||
| Rise/Fall Time (20% to 80%) - 3.3 V Strong Mode | 0.4 ns | 0.6 ns | ns | 10 pF load | |
| Output Voltage High (VOH) - 3.3 V, IOH = 1 mA | VDD3 - 0.1 V | V |
Key Features
- Supports GR-1244 Stratum 3 stability in holdover mode and Telcordia GR-253 jitter generation, transfer, and tolerance for SONET/SDH up to OC-192 systems.
- Smooth reference switchover with virtually no disturbance on output phase.
- On-chip EEPROM to store multiple power-up profiles.
- Pin program function for easy frequency translation configuration.
- Software-controlled power-down.
- Digital PLL allows for reduction of input time jitter or phase noise associated with external references.
- Continuously generates a low jitter output clock even when all reference inputs have failed.
Applications
- Network synchronization, including synchronous Ethernet and SDH to OTN mapping/demapping.
- Cleanup of reference clock jitter.
- SONET/SDH clocks up to OC-192, including FEC.
- Stratum 3 holdover, jitter cleanup, and phase transient control.
- Wireless base station controllers.
- Cable infrastructure.
- Data communications.
Q & A
- What is the operating temperature range of the AD9559BCPZ-REEL7?
The operating temperature range is −40°C to +85°C.
- What type of package does the AD9559BCPZ-REEL7 come in?
The component is packaged in a 72-Lead Lead Frame Chip Scale Package (LFCSP).
- What is the frequency range of the crystal resonator for the AD9559?
The crystal resonator frequency range is from 10 MHz to 50 MHz in fundamental mode, using an AT cut crystal.
- What are the reference input frequency ranges for the AD9559?
The reference input frequency ranges are from 10 MHz to 750 MHz for sinusoidal inputs and from 0.002 MHz to 1250 MHz for LVPECL inputs.
- What is the minimum input slew rate required for the AD9559?
The minimum input slew rate required is 40 V/μs for optimal jitter performance.
- How does the AD9559 handle reference input failures?
The AD9559 continuously generates a low jitter output clock even when all reference inputs have failed, thanks to its digital PLL and holdover circuitry.
- What are some key applications of the AD9559?
Key applications include network synchronization, reference clock jitter cleanup, SONET/SDH clocks, wireless base station controllers, cable infrastructure, and data communications.
- Does the AD9559 support Stratum 3 stability?
Yes, the AD9559 supports GR-1244 Stratum 3 stability in holdover mode.
- How is the AD9559 programmed?
The AD9559 can be programmed using its pin program function and also has on-chip EEPROM to store multiple power-up profiles.
- What is the power-down feature of the AD9559?
The AD9559 features software-controlled power-down, allowing for efficient power management.
