Overview
The AD9554BCPZ-REEL7, produced by Analog Devices Inc., is a low loop bandwidth clock translator designed to provide jitter cleanup and synchronization for various systems, including synchronous optical networks (SONET/SDH) and other high-speed communication networks. This device generates an output clock synchronized to up to four external input references, utilizing digital phase-locked loops (DPLLs) to reduce input time jitter or phase noise. The AD9554 operates over an industrial temperature range of −40°C to +85°C and is packaged in a 72-lead LFCSP (10 mm × 10 mm) package.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Supply Voltage | 1.5 | - | 1.5 | V | - |
| Supply Current | - | 420 | - | mA | - |
| Power Dissipation | - | 630 | - | mW | - |
| System Clock Input Frequency | 16 | - | 150 | MHz | - |
| Reference Input Frequency (Differential Mode) | 10 | - | 475 | MHz | Sinusoidal Input |
| Reference Input Frequency (LVPECL) | 0.002 | - | 1000 | MHz | - |
| Reference Input Frequency (LVDS) | 0.002 | - | 700 | MHz | - |
| Minimum Input Slew Rate (DPLL Loop Bandwidth = 50 Hz) | 40 | - | - | V/μs | - |
| Minimum Input Slew Rate (DPLL Loop Bandwidth = 4 kHz) | 150 | - | - | V/μs | - |
| Operating Temperature Range | -40 | - | 85 | °C | - |
Key Features
- Low loop bandwidth clock translator for jitter cleanup and synchronization.
- Supports up to four external input references.
- Digital phase-locked loops (DPLLs) for reducing input time jitter or phase noise.
- Digitally controlled loop and holdover circuitry to continuously generate a low jitter output clock even when all reference inputs fail.
- Operates over an industrial temperature range of −40°C to +85°C.
- 72-lead LFCSP (10 mm × 10 mm) package.
- Supports SONET/SDH clocks up to OC-192, including FEC.
- Stratum 3 holdover, jitter cleanup, and phase transient control.
Applications
- Network synchronization, including synchronous Ethernet and synchronous digital hierarchy (SDH) to optical transport network (OTN) mapping/demapping.
- Cleanup of reference clock jitter.
- Cable infrastructure.
- Data communications.
- Professional video.
Q & A
- What is the primary function of the AD9554BCPZ-REEL7?
The primary function is to provide jitter cleanup and synchronization for various systems, including synchronous optical networks (SONET/SDH).
- How many external input references can the AD9554 support?
The AD9554 can support up to four external input references.
- What type of loops does the AD9554 use for jitter reduction?
The AD9554 uses digital phase-locked loops (DPLLs) for reducing input time jitter or phase noise.
- What happens to the output clock if all reference inputs fail?
The digitally controlled loop and holdover circuitry continuously generate a low jitter output clock even when all reference inputs fail.
- What is the operating temperature range of the AD9554BCPZ-REEL7?
The operating temperature range is −40°C to +85°C.
- What is the package type and size of the AD9554BCPZ-REEL7?
The package is a 72-lead LFCSP (10 mm × 10 mm).
- Does the AD9554 support Stratum 3 holdover and jitter cleanup?
Yes, it supports Stratum 3 holdover, jitter cleanup, and phase transient control.
- What are some of the key applications of the AD9554BCPZ-REEL7?
Key applications include network synchronization, cable infrastructure, data communications, and professional video.
- What is the frequency range for the system clock input?
The system clock input frequency range is from 16 MHz to 150 MHz.
- What is the minimum input slew rate for the DPLL loop bandwidth of 50 Hz?
The minimum input slew rate for a DPLL loop bandwidth of 50 Hz is 40 V/μs.
