Overview
The AD809BRZ-REEL7, produced by Analog Devices Inc., is a 155.52 MHz frequency synthesizer designed for high-performance timing applications. This device is particularly suited for generating a 155.52 MHz bit clock for SONET/SDH/Fiber in the Loop systems. It features a low-jitter VCO, low power consumption, and a wide operating temperature range, making it ideal for various telecommunications and data transmission systems.
Key Specifications
| Parameter | Condition | Min | Max | Units | |
|---|---|---|---|---|---|
| Input Reference Frequency | ×8 Synthesis | 19.42 | 19.44 | 19.46 | MHz |
| Input Reference Frequency | ×16 Synthesis | 9.71 | 9.72 | 9.73 | MHz |
| Output Jitter | ×8 Synthesis | 1.6 | 2.0 | 2.9 | Degrees RMS |
| Power Consumption | 90 | mW | |||
| Supply Voltage | +5 V or –5.2 V | V | |||
| Operating Temperature Range | –40°C | +85°C | °C | ||
| Package Type | 16-Pin Narrow Body SOIC |
Key Features
- Frequency synthesis to 155.52 MHz from 19.44 MHz or 9.72 MHz input reference signals.
- Low jitter VCO with output jitter of 2.0 degrees RMS.
- Single supply operation: +5 V or –5.2 V.
- Low power consumption of 90 mW.
- ECL/PECL compatible output and ECL/PECL/TTL/CMOS compatible input.
- No external components required for frequency synthesis, but loop dynamics can be adjusted via a damping factor capacitor.
- Wide operating temperature range of –40°C to +85°C.
Applications
- SONET/SDH/Fiber in the Loop systems.
- Distributed timing architectures in backplanes or PCBs.
- Telecommunications systems requiring precise timing signals.
- Data transmission systems where low jitter clocks are essential.
Q & A
- What is the primary function of the AD809BRZ-REEL7?
The AD809BRZ-REEL7 is a frequency synthesizer that generates a 155.52 MHz clock from either a 19.44 MHz or a 9.72 MHz reference frequency.
- What types of input signals does the AD809BRZ-REEL7 support?
The device supports ECL/PECL/TTL/CMOS input signals.
- What is the output jitter of the AD809BRZ-REEL7?
The output jitter is approximately 2.0 degrees RMS.
- What is the power consumption of the AD809BRZ-REEL7?
The device consumes 90 mW of power.
- What is the operating temperature range of the AD809BRZ-REEL7?
The device operates within a temperature range of –40°C to +85°C.
- Does the AD809BRZ-REEL7 require external components for frequency synthesis?
No external components are required for frequency synthesis, but loop dynamics can be adjusted using a damping factor capacitor.
- What type of package does the AD809BRZ-REEL7 come in?
The device is packaged in a 16-Pin Narrow Body SOIC.
- How does the AD809BRZ-REEL7 handle the absence of an input signal?
In the absence of an input signal, the clock output frequency will drift low by roughly 20%.
- What are some common applications of the AD809BRZ-REEL7?
Common applications include SONET/SDH/Fiber in the Loop systems, distributed timing architectures, and telecommunications systems requiring precise timing signals.
- What is the phase skew of the AD809BRZ-REEL7 output relative to the input?
The phase skew is relatively constant over temperature, with the falling edge at the output occurring approximately 700 ps before the rising edge at the input at 27°C.
