The AD809 is a 155.52 MHz frequency synthesizer that can be used to create a 155.52 Mbps port's transmit bit clock. The device has a low jitter VCO, low power and wide operating temperature range, making it suitable for generating a 155.52 MHz bit clock for SONET/SDH/Fiber in the Loop systems.
The AD809 is a frequency synthesizer designed to generate a 155.52 MHz clock signal from either a 19.44 MHz or 9.72 MHz input reference. It features an on-chip voltage-controlled oscillator (VCO) that locks to the input frequency, eliminating the need for external components for basic operation. The device is optimized for SONET/SDH and Fiber in the Loop systems.
| Output Frequency | 155.52 MHz |
|---|---|
| Input Reference Frequencies | 19.44 MHz or 9.72 MHz |
| Power Supply Voltage | +5 V or –5.2 V |
| Power Consumption | 90 mW |
| Output Jitter (×16 Synthesis) | 2.9 Degrees RMS |
The device supports a 19.44 MHz or a 9.72 MHz TTL/CMOS/ECL/PECL reference frequency.
No, the device has a low cost, on-chip VCO that locks to the input frequency without needing external components.
The output jitter for ×16 synthesis ranges from 1.6 to 2.9 Degrees RMS.