AD9547
RECOMMENDED FOR NEW DESIGNSDual/Quad Input Network Clock Generator/Synchronizer
Part Details
- Supports Stratum 2 stability in holdover mode
- Supports reference switchover with phase build-out
- Supports hitless reference switchover
- Automatic/manual holdover and reference switchover
- 2 pairs of reference input pins, with each pair configurable as a single differential input or as 2 independent single-ended inputs
- Input reference frequencies from 1 kHz to 750 MHz
- Reference validation and frequency monitoring (1 ppm)
- Programmable input reference switchover priority
- 30-bit programmable input reference divider
- 2 pairs of clock output pins, with each pair configurable as a single differential LVDS/LVPECL output or as 2 single-ended CMOS outputs
- Output frequencies up to 450 MHz
- 20-bit integer and 10-bit fractional programmable feedback divider
- Programmable digital loop filter covering loop bandwidths from 0.001 Hz to 100 kHz
- Optional low noise LC-VCO system clock multiplier
- Optional crystal resonator for system clock input
- On-chip EEPROM to store multiple power-up profiles
- Software controlled power-down
- 64-lead LFCSP package
The AD9547 provides synchronization for many systems, including synchronous optical networks (SONET/SDH). The AD9547 generates an output clock that is synchronized to one of two differential or four single-ended external input references. The digital PLL allows for reduction of input time jitter or phase noise associated with the external references. The AD9547 continuously generates a clean (low jitter), valid output clock, even when all references fail, by means of digitally controlled loop and holdover circuitry.
The AD9547 operates over an industrial temperature range of −40°C to +85°C.
Applications
Documentation
Data Sheet 1
User Guide 1
Frequently Asked Question 1
Video 3
Product Selection Guide 1
This is the most up-to-date revision of the Data Sheet.
Software Resources
Evaluation Software 2
AD9547/AD9548 Evaluation Board USB Flash Programmer Readme
readme-ad9547-ad9548-evaluation-board-usb-flash-programmer