AD800-52BRRL

Overview

The AD800-52BRRL is a Clock and Data Recovery IC from Analog Devices, designed for telecommunications applications. It employs a second-order phase-locked loop architecture to recover clock signals and retime Non-Return to Zero (NRZ) data at a nominal center frequency of 51.84 MHz, supporting the STS-1 standard. The device accepts differential ECL input data and provides differential ECL outputs for recovered clock and retimed data. It operates on a single supply voltage ranging from -4.5 V to -5.5 V or +5 V, with an operating temperature range of -40°C to +85°C. The component is housed in a 20-pin Plastic SOIC package.

Feature Summary

• Supports 51.84 Mbps STS-1 data rates with no preamble required
• Integrated PLL eliminates need for external VCXO or crystal
• Provides Frequency Acquisition (FRAC) indicator output
• Virtually eliminates pattern jitter via patented phase detector

Applications

• DS-3 and STS-1 telecommunications systems
• Clock recovery from NRZ data streams
• Data retiming in high-speed digital circuits

Procurement Notes

Verify that the 'RRL' suffix corresponds to the reel packaging variant of the AD800-52BR. Confirm availability status as distribution channels may list limited stock or end-of-life conditions for this specific part number. Ensure the ordering suffix does not alter the electrical specifications defined in the datasheet.

Selection Notes

Select this model for STS-1 (51.84 Mbps) applications requiring ECL interface compatibility. The damping factor must be set using an external capacitor; a value of 0.15 µF yields a nominal damping factor of 5. Ensure power supply decoupling includes a 10 µF tantalum capacitor and 0.1 µF ceramic capacitors close to the device pins.

Part Context

This component belongs to the AD800/AD802 family of clock recovery ICs. The AD800 series supports lower data rates such as DS-3 (44.736 Mbps) and STS-1 (51.84 Mbps), while the AD802 series supports higher rates like STM-1 (155.52 Mbps). All variants share similar PLL architectures but differ in center frequency and loop bandwidth settings.

Replacement Considerations

The AD800-52BR is the direct equivalent without the reel suffix. For different data rates, consider the AD800-45BQ for DS-3 or the AD802-155KR/BR for STM-1 applications.