Overview
The ADN2855ACPZ is a burst mode clock and data recovery IC designed by Analog Devices Inc. for use in GPON/BPON/GEPON optical line terminal (OLT) receiver applications. This device is capable of operating at multiple data rates, including 155.52 Mbps, 622.08 Mbps, 1244.16 Mbps, and 1250.00 Mbps, which can be selected via the I2C interface. It features a patented dual-loop clock recovery architecture, ensuring precise alignment to the input data within 12 bits of the start of the preamble. The ADN2855 is packaged in a compact 5 mm × 5 mm, 32-lead chip scale package (LFCSP) and operates on a single 3.3 V supply.
Key Specifications
| Parameter | Value |
|---|---|
| Data Rates | 155.52 Mbps, 622.08 Mbps, 1244.16 Mbps, 1250.00 Mbps |
| Acquisition Time | 12 bits from the start of the preamble |
| Output Interface | 4-bit parallel LVDS |
| Supply Voltage | 3.3 V |
| Power Consumption | 670 mW (serial output mode), 825 mW (deserializer mode) |
| Package | 32-lead LFCSP (5 mm × 5 mm) |
| Operating Temperature | −40°C to +85°C |
| Clock Output | Full rate or half rate for DDR interface |
Key Features
- Patented dual-loop clock recovery architecture
- Integrated PRBS generator
- Byte rate reference clock
- Loss-of-lock indicator
- Supports double data rate (DDR)-compatible FPGA interface
- I2C interface for accessing optional features
- Single-supply operation: 3.3 V
- Data valid indicator (DATAV)
- Compact 5 mm × 5 mm, 32-lead chip scale package
Applications
The ADN2855ACPZ is specifically designed for use in GPON/BPON/GEPON optical line terminal (OLT) receiver applications. It is suitable for environments requiring precise clock and data recovery in burst mode operations.
Q & A
- What are the supported data rates of the ADN2855?
The ADN2855 supports data rates of 155.52 Mbps, 622.08 Mbps, 1244.16 Mbps, and 1250.00 Mbps. - How is the data rate selected on the ADN2855?
The data rate is selectable via the I2C interface. - What is the acquisition time of the ADN2855?
The acquisition time is 12 bits from the start of the preamble. - What type of output interface does the ADN2855 provide?
The ADN2855 provides a 4-bit parallel LVDS output interface. - What is the supply voltage of the ADN2855?
The supply voltage is 3.3 V. - How much power does the ADN2855 consume?
The power consumption is typically 670 mW in serial output mode and 825 mW in deserializer mode. - What is the package type of the ADN2855?
The package type is a 32-lead LFCSP (5 mm × 5 mm). - What is the operating temperature range of the ADN2855?
The operating temperature range is −40°C to +85°C. - Does the ADN2855 support DDR-compatible FPGA interfaces?
Yes, it supports double data rate (DDR)-compatible FPGA interfaces. - What additional features does the ADN2855 have?
The ADN2855 includes an integrated PRBS generator, byte rate reference clock, loss-of-lock indicator, and a data valid indicator (DATAV).
