Overview
The AD9547BCPZ, produced by Analog Devices Inc., is a dual/quad input network clock generator and synchronizer. This component is designed to provide synchronization for various systems, including synchronous optical networks (SONET/SDH), wireless base stations, and data communications. The AD9547 generates an output clock that is synchronized to one of two differential or four single-ended external input references, ensuring a clean and low-jitter output clock even when all references fail, thanks to its digitally controlled loop and holdover circuitry. It operates over an industrial temperature range of −40°C to +85°C.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Comments |
|---|---|---|---|---|---|
| Input Reference Frequencies | 1 kHz | 750 MHz | |||
| Output Frequencies | 450 MHz | ||||
| Input Reference Divider | 30-bit programmable | ||||
| Feedback Divider | 20-bit integer, 10-bit fractional | ||||
| Loop Filter Bandwidth | 0.001 Hz | 100 kHz | Programmable | ||
| Operating Temperature | −40°C | +85°C | Industrial range | ||
| Package Type | 64-lead LFCSP |
Key Features
- Supports Stratum 2 stability in holdover mode and Stratum 3E and Stratum 3 reference clocks.
- Reference switchover with phase build-out and hitless reference switchover.
- Automatic/manual holdover and reference switchover.
- 2 pairs of reference input pins, configurable as single differential or 2 independent single-ended inputs.
- Reference validation and frequency monitoring (1 ppm).
- Programmable input reference switchover priority.
- Optional low noise LC-VCO system clock multiplier and crystal resonator for system clock input.
- On-chip EEPROM to store multiple power-up profiles.
- Software controlled power-down and programmable digital loop filter.
Applications
- Network synchronization.
- Cleanup of reference clock jitter.
- SONET/SDH clocks up to OC-192, including FEC.
- Wireless base stations and controllers.
- Cable infrastructure.
- Data communications).
Q & A
- What is the primary function of the AD9547BCPZ?
The AD9547BCPZ is a dual/quad input network clock generator and synchronizer, designed to provide synchronization for various systems, including SONET/SDH networks and wireless base stations.
- What is the temperature range for the AD9547BCPZ?
The AD9547BCPZ operates over an industrial temperature range of −40°C to +85°C.
- What types of input references can the AD9547BCPZ accept?
The AD9547BCPZ can accept two differential or four single-ended external input references.
- What is the maximum output frequency of the AD9547BCPZ?
The maximum output frequency is up to 450 MHz.
- Does the AD9547BCPZ support Stratum 2 stability?
- What is the purpose of the on-chip EEPROM in the AD9547BCPZ?
The on-chip EEPROM is used to store multiple power-up profiles.
- Can the AD9547BCPZ perform reference switchover?
- What is the package type of the AD9547BCPZ?
The AD9547BCPZ comes in a 64-lead LFCSP package.
- Does the AD9547BCPZ have programmable loop filter bandwidth?
- What is the minimum input slew rate for the high frequency path?
The minimum input slew rate for the high frequency path is 200 V/µs.
