Overview
The AD9554BCPZ from 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), Ethernet, and Stratum applications. This device generates an output clock synchronized to up to four external input references using its digital PLL (DPLL) and analog PLL (APLL) circuits. The AD9554BCPZ features digitally controlled loop and holdover circuitry, ensuring continuous generation of a low jitter output clock even when all reference inputs have failed. It operates over an industrial temperature range of -40°C to +85°C, making it suitable for a wide range of environments.
Key Specifications
| Attribute | Value | Unit |
|---|---|---|
| Package | 72-VFQFN Exposed Pad, CSP | |
| Product Status | Active | |
| PLL | Yes | |
| Main Purpose | Ethernet, SONET/SDH, Stratum | |
| Input | CMOS, LVDS, LVPECL, HCSL, SSTL | |
| Output | HCSL, LVDS, LVPECL | |
| Ratio - Input:Output | 4:8 | |
| Differential - Input:Output | Yes/Yes | |
| Frequency - Max | 941 MHz | |
| Voltage - Supply | 1.47 V ~ 1.89 V | |
| Operating Temperature | -40°C ~ 85°C | |
| Mounting Type | Surface Mount |
Key Features
- Quad PLL and quad input configuration for versatile clock synchronization.
- Digital PLL (DPLL) and analog PLL (APLL) for jitter cleanup and phase noise reduction.
- Holdover circuitry to maintain a stable output clock even when all reference inputs fail.
- Support for various input and output signal formats including CMOS, LVDS, LVPECL, HCSL, and SSTL.
- Industrial temperature range operation from -40°C to +85°C.
- 72-lead LFCSP package with exposed pad for efficient heat dissipation.
Applications
- Network synchronization, including synchronous Ethernet and synchronous digital hierarchy (SDH) to optical transport network (OTN) mapping/demapping.
- Cleanup of reference clock jitter in SONET/SDH systems up to OC-192, including FEC.
- Stratum 3 holdover, jitter cleanup, and phase transient control.
- Cable infrastructure and data communications.
- Professional video applications requiring precise clock synchronization.
Q & A
- What is the primary function of the AD9554BCPZ?
The AD9554BCPZ is a low loop bandwidth clock translator that provides jitter cleanup and synchronization for various systems, including SONET/SDH and Ethernet.
- How many input references can the AD9554BCPZ handle?
The AD9554BCPZ can handle up to four external input references.
- What types of input and output signals does the AD9554BCPZ support?
The device supports CMOS, LVDS, LVPECL, HCSL, and SSTL input and output signal formats.
- What is the maximum frequency supported by the AD9554BCPZ?
The maximum frequency supported is 941 MHz.
- What is the operating temperature range of the AD9554BCPZ?
The device operates over an industrial temperature range of -40°C to +85°C.
- What is the purpose of the holdover circuitry in the AD9554BCPZ?
The holdover circuitry ensures continuous generation of a low jitter output clock even when all reference inputs have failed.
- What package type is used for the AD9554BCPZ?
The device is packaged in a 72-lead LFCSP (Lead Frame Chip Scale Package) with an exposed pad.
- What are some common applications of the AD9554BCPZ?
Common applications include network synchronization, SONET/SDH systems, Stratum 3 holdover, cable infrastructure, data communications, and professional video.
- Does the AD9554BCPZ support differential input and output?
Yes, the device supports differential input and output configurations.
- What is the supply voltage range for the AD9554BCPZ?
The supply voltage range is from 1.47 V to 1.89 V.
