Overview
The AD809BRZ, 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 features an on-chip voltage-controlled oscillator (VCO) that can lock to either 8× or 16× the frequency of the input reference signal, which can be 19.44 MHz or 9.72 MHz. The AD809BRZ operates on a single power supply of +5 V or –5.2 V and consumes a low power of 90 mW, making it energy-efficient and suitable for a wide range of applications.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Input Frequency Range (×8 Synthesis) | 19.42 | 19.44 | 19.46 | MHz | |
| Input Frequency Range (×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 | +4.5 | +5 | +5.5 | V | |
| Operating Temperature | -40 | 85 | °C | ||
| Package Type | 16-SOIC (0.154", 3.90mm Width) |
Key Features
- Frequency Synthesis: Generates a 155.52 MHz ECL/PECL output clock from either a 19.44 MHz or a 9.72 MHz TTL/CMOS/ECL/PECL reference frequency.
- Low Jitter VCO: Features a low jitter VCO, ensuring minimal dynamic displacement of digital signal edges.
- Single Supply Operation: Operates from a single power supply at either +5 V or –5.2 V.
- Low Power Consumption: Consumes only 90 mW, making it energy-efficient.
- Wide Operating Temperature Range: Operates over a temperature range of -40°C to 85°C.
- No External Components Needed: No external components are required for frequency synthesis, although loop dynamics can be adjusted using a damping factor capacitor.
- Input Signal Multiplexer: Supports loop-timed applications where a 155.52 MHz transmit bit clock is recovered from the received data.
Applications
- SONET/SDH Systems: Suitable for generating bit clocks in SONET/SDH networks.
- Fiber in the Loop Systems: Used in Fiber in the Loop systems for clock signal generation.
- Distributed Timing Architecture: Supports distributed timing architectures, allowing timing reference signals to be distributed across backplanes or PCBs.
- Telecommunications: Applied in various telecommunications systems requiring precise clock signals.
Q & A
- What is the output frequency of the AD809BRZ?
The AD809BRZ generates a 155.52 MHz ECL/PECL output clock.
- What are the input frequency options for the AD809BRZ?
The device can accept either a 19.44 MHz or a 9.72 MHz TTL/CMOS/ECL/PECL reference frequency.
- What is the power consumption of the AD809BRZ?
The AD809BRZ consumes 90 mW of power.
- What is the operating temperature range of the AD809BRZ?
The device operates over a temperature range of -40°C to 85°C.
- Does the AD809BRZ require external components for frequency synthesis?
No, the AD809BRZ does not require external components for frequency synthesis, although a damping factor capacitor can be used to adjust loop dynamics.
- What types of input signals does the AD809BRZ support?
The device supports TTL/CMOS, ECL, and PECL input signals.
- What is the typical output jitter of the AD809BRZ?
The typical output jitter is 2.0 degrees RMS.
- What package type is the AD809BRZ available in?
The AD809BRZ is available in a 16-SOIC package with a width of 0.154 inches (3.90 mm).
- Can the AD809BRZ be used in distributed timing architectures?
Yes, the AD809BRZ supports distributed timing architectures, allowing timing reference signals to be distributed across backplanes or PCBs.
- What are some common applications of the AD809BRZ?
The AD809BRZ is commonly used in SONET/SDH systems, Fiber in the Loop systems, and other telecommunications applications requiring precise clock signals.
