Overview
The AD809BR, produced by Analog Devices Inc., is a 155.52 MHz frequency synthesizer designed to generate high-frequency clock signals from lower-frequency reference inputs. This device is particularly useful in telecommunications and data transmission systems, such as SONET/SDH and Fiber in the Loop networks. It operates from a single power supply and supports various input and output signal formats, making it versatile for different system architectures.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Input Reference Frequency | - | 19.42 | 19.44 | 19.46 | MHz (×8 Synthesis) |
| Input Reference Frequency | - | 9.71 | 9.72 | 9.73 | MHz (×16 Synthesis) |
| Output Frequency | - | - | 155.52 | - | MHz |
| Output Jitter | - | 1.6 | 2.9 | - | Degrees RMS |
| Supply Voltage | - | 4.5 | - | 5.5 | V |
| Power Consumption | - | - | 90 | - | mW |
| Operating Temperature | - | -40 | - | 85 | °C |
| Package Type | - | - | - | 16-Pin Narrow 150 Mil SOIC | - |
| Input Compatibility | - | - | - | TTL, CMOS, ECL, PECL | - |
| Output Compatibility | - | - | - | ECL, PECL | - |
Key Features
- Frequency synthesis up to 155.52 MHz from 19.44 MHz or 9.72 MHz reference frequencies.
- Single supply operation: +5 V or –5.2 V.
- Low power consumption: 90 mW.
- Low jitter VCO: 2.0 degrees RMS.
- Input signal multiplexer for loop-timed applications.
- No external components required for frequency synthesis.
- Adjustable loop dynamics through a damping factor capacitor.
- Supports distributed timing architecture.
- Compatible with ECL, PECL, TTL, and CMOS input and output signals.
Applications
The AD809BR is primarily used in telecommunications and data transmission systems, including:
- SONET/SDH networks.
- Fiber in the Loop systems.
- Distributed timing architectures in backplanes or PCBs.
- Loop-timed applications where a 155.52 MHz transmit bit clock needs to be recovered from received data.
Q & A
- What is the primary function of the AD809BR?
The AD809BR is a frequency synthesizer that generates a 155.52 MHz clock signal from either a 19.44 MHz or a 9.72 MHz reference frequency. - What are the supported input signal formats for the AD809BR?
The AD809BR supports TTL, CMOS, ECL, and PECL input signals. - What are the supported output signal formats for the AD809BR?
The AD809BR provides ECL and PECL output signals. - What is the power consumption of the AD809BR?
The AD809BR consumes 90 mW of power. - What is the operating temperature range of the AD809BR?
The operating temperature range is from -40°C to 85°C. - Does the AD809BR require external components for frequency synthesis?
No, the AD809BR does not require external components for frequency synthesis, although a damping factor capacitor can be used to adjust loop dynamics. - What is the typical output jitter of the AD809BR?
The typical output jitter is 2.0 degrees RMS. - In what types of systems is the AD809BR commonly used?
The AD809BR is commonly used in SONET/SDH and Fiber in the Loop systems. - What package type is the AD809BR available in?
The AD809BR is available in a 16-Pin Narrow 150 Mil SOIC package. - Is the AD809BR RoHS compliant?
No, the AD809BR is not RoHS compliant as it contains lead.
