AD9547 Dual/Quad Input Network Clock Generator/Synchronizer

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 con-tinuously generates a clean (low jitter), valid output clock, even when all references fail, by means of digitally controlled loop and holdover circuitry. Applications Network synchronization Cleanup of reference clock jitter SONET/SDH clocks up to OC-192, including FEC Stratum 2 holdover, jitter cleanup, and phase transient control Stratum 3E and Stratum 3 reference clocks Wireless base stations, controllers Cable infrastructure Data communications

The AD9547 operates over an industrial temperature range of −40°C to +85°C.

Features and Benefits

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

See data sheet for additional features

Data Sheets

Document	note
AD9547: Dual/Quad Input Network Clock Generator/Synchronizer Data Sheet (Rev. G)	PDF 1753 kB

User Guides

Document	note
UG-639: Evaluating the AD9547 and AD9548 Digital PLL Clock Synthesizers	PDF 931 kB

Frequently Asked Questions

Document	note

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
AD9547BCPZ Production	64 ld LFCSP (9x9mm, 6.20mm exposed pad)	OTH 260	-40 to 85C	15.62	13.27	Y
AD9547BCPZ-REEL7 Production	64 ld LFCSP (9x9mm, 6.20mm exposed pad)	REEL 750	-40 to 85C	15.62	13.27	Y

Evaluation Boards

Part Number	Description	Price	RoHS
AD9547/PCBZ	Evaluation Board	250	Y

Reference Materials

Product Selection Guide：RF Source Booklet

AD9547: Dual/Quad Input Network Clock Generator/Synchronizer Data Sheet (Rev. G) ad9547

AD9547 (All Models/All Speed Grades) ad9547

UG-639: Evaluating the AD9547 and AD9548 Digital PLL Clock Synthesizers ad9548

RF Source Booklet adf9010