The ADN2805 is a clock and data recovery IC that provides receiver functions for 1.25 Gbps. It features locking to 1.25 Gbps NRZ serial data input, no reference clock required, loss-of-lock indicator, I2C interface, single-supply operation, low power, etc.
The ADN2805 is a 1.25 Gbps clock and data recovery integrated circuit that provides receiver functions such as quantization, clock recovery, and loss‑of‑lock indication without requiring an external reference clock. It is targeted for GbE line‑card applications and operates over a temperature range of –40 °C to +85 °C.
The document includes features, applications, detailed electrical specifications, pin configuration, I²C register interface, SQUELCH mode operation, PCB design guidelines, and thermal and absolute‑maximum ratings. Key sections such as the functional block diagram, jitter specifications, and output timing are presented with tables and figures.
| Data Rate | 1250 Mbps |
|---|---|
| Power Supply Voltage | 3.0 – 3.6 V |
| Power Supply Current | 118 – 131 mA |
| Operating Temperature Range | -40 °C to +85 °C |
| LVDS Output Swing (VOD) | 240 – 400 mV |
| Output Impedance | 100 Ω |
| I2C Clock Frequency | 400 kHz |
| Package Size | 5 mm × 5 mm |
The ADN2805 supports a data rate of up to 1.25 Gbps (1250 Mbps).
No, the device locks to the incoming data stream without an external reference clock.
The loss‑of‑lock indicator is provided on the LOL pin, which is LVTTL active‑high.