AD9540:  Low Jitter, DDS-based Clock Generator and Synthesizer

The AD9540 supports a variety of functions including signal synthesis and low jitter clock generation useful in a wide variety of applications. The device features high performance PLL circuitry ...More

Two evaluation boards are available for the AD9540:
AD9540-VCO/PCB: Evaluation board with 1.6 GHz VCO and correlating loop filter
AD9540/PCB: Evaluation Board with no VCO and unpopulated loop filter

An Overview of the Clock Distribution/Generation Family is available.

AD9540:  Low Jitter, DDS-based Clock Generator and Synthesizer

Product Description

The AD9540 supports a variety of functions including signal synthesis and low jitter clock generation useful in a wide variety of applications. The device features high performance PLL circuitry including a flexible 200 MHz Phase Frequency Detector and a digitally controlled charge pump current. The device also provides a low jitter, 655 MHz CML mode (PECL compatible) output driver with programmable slew rates. External VCO rates up to 2.7 GHz are supported. An onboard 400 MSPS DDS provides extremely fine tuning resolution and phase programmability. Information is loaded into the AD9540 via a serial I/O port which has a device write speed of 25Mbit/sec. The AD9540 frequency divider block can also be programmed to support a spread spectrum clocking mode.

The AD9540 is specified to operate over the extended automotive range of -40°C to +85°C.

Applications

  • Clocking high performance data converters
  • Basestation clocking applications
  • Network (SONET/SDH) clocking
  • Gigabit Ethernet (GbE) clocking
  • Instrumentation clocking circuits

Features

  • Intrinsic Jitter performance < 500 fs
  • Synthesizes signals to 2.7 GHz
  • Generates clock signals to 655 MHz
  • 25 Mbit/sec write speed Serial I/O Control
  • 200 MHz Phase Frequency Detector Inputs
  • 400 MSPS DDS onboard
    Programmable edge delay w/ 93 fs resolution
    Frequency resolution <2.33 µHz
  • 655 MHz Programmable Input Dividers for the Phase Frequency Detector (÷M,N) {M,N =1..16} (bypassable)
  • 8 Programmable internal clock rates
  • 1.8 V Supply for device operation
    3.3 V Supply for I/O, CML Driver & Charge Pump Output
  • Software controlled power-down
  • 48-lead LFCSP package
  • Programmable charge pump current (up to 4 mA)

Diagrams

AD9540 Diagram
Functional Block Diagram for AD9540

Specifications

Primary Clock Function Clean Up,Generation
On-Chip Multiplier PLL Core
+Supply Voltage (V) 3.3V
Max Input Frequency 655MHz
# of Outputs 1
Max f-out (MHz) 655MHz
I/O Interface Serial
Package 48-LFCSP
Output Logic CML,PECL-Compliant
Product Description Clock Generator Synchronizer

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Part# Product Description +Supply Voltage (V) # of Inputs # of Outputs On-Chip VCO or DCO Max f-out (MHz) Output Logic Random Jitter (ps-RMS) Package Price* (1000-4999)
AD9510 Multi-Output Clock Generator 3.3 1 8 No 1200 CMOS, LVDS, LVPECL 0.225 64-LFCSP $12.09
AD9511 Multi-Output Clock Generator 3.3 1 5 No 1200 CMOS, LVDS, LVPECL 0.225 48-LFCSP $10.07
AD9512 Clock Divider 3.3 1 5 No 1200 CMOS, LVDS, LVPECL 0.225 48-LFCSP $9.06
AD9513 Clock Divider 3.3 1 3 No 800 CMOS, LVDS 0.3 32-LFCSP $6.02
AD9514 Clock Divider 3.3 1 3 No 1600 CMOS, LVDS, LVPECL 0.225 32-LFCSP $6.02
AD9515 Clock Divider 3.3 1 2 No 1600 CMOS, LVDS, LVPECL 0.225 32-LFCSP $4.81
AD9516-0 Multi-Output Clock Generator 3.3 2 14 Yes 2950 CMOS, LVDS, LVPECL 0.4 64-LFCSP $12.65
AD9516-1 Multi-Output Clock Generator 3.3 2 14 Yes 2650 CMOS, LVDS, LVPECL 0.4 64-LFCSP $12.65
AD9516-2 Multi-Output Clock Generator 3.3 2 14 Yes 2335 CMOS, LVDS, LVPECL 0.4 64-LFCSP $12.65
AD9516-3 Multi-Output Clock Generator 3.3 2 14 Yes 2250 CMOS, LVDS, LVPECL 0.4 64-LFCSP $12.65
AD9516-4 Multi-Output Clock Generator 3.3 2 14 Yes 1800 CMOS, LVDS, LVPECL 0.4 64-LFCSP $12.65
AD9517-0 Multi-Output Clock Generator 3.3 2 12 Yes 2950 CMOS, LVDS, LVPECL 0.4 48-LFCSP $11.54
AD9517-1 Multi-Output Clock Generator 3.3 2 12 Yes 2650 CMOS, LVDS, LVPECL 0.4 48-LFCSP $11.54
AD9517-2 Multi-Output Clock Generator 3.3 2 12 Yes 2335 CMOS, LVDS, LVPECL