Dual-Input Multiservice Line Card Adaptive Clock Translator
The AD9557 is a low loop bandwidth clock multiplier that provides jitter cleanup and synchronization for many systems, including synchronous optical networks (OTN/SONET/SDH). The AD9557 generates an output clock synchronized to up to four external input references. The digital PLL allows for reduction of input time jitter or phase noise associated with the external references. The digitally controlled loop and holdover circuitry of the AD9557 continuously generates a low jitter output clock even when all reference inputs have failed.
The AD9557 operates over an industrial temperature range of −40°C to +85°C. If more inputs/outputs are needed, refer to the AD9558 for the four-input/six-output version of the same device.
- Network synchronization, including synchronous Ethernet and SDH to OTN mapping/demapping
- Cleanup of reference clock jitter
- SONET/SDH/OTN clocks up to 100 Gbps, including FEC
- Stratum 3 holdover, jitter cleanup, and phase transient control
- Wireless base station controllers
- Cable infrastructure
- Data communications
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Recommended Clock Drivers
Recommended Linear Regulators
- For ultralow noise, low dropout , we recommend the ADP150 .
Recommended Switching Controller
- For a dual controller up to 2 x 25A output current , we recommend the ADP1829 .
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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