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 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.
- Clocking high performance data converters
- Basestation clocking applications
- Network (SONET/SDH) clocking
- Gigabit Ethernet (GbE) clocking
- Instrumentation clocking circuits
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This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Ask The Application Engineer—33: All About Direct Digital Synthesis
(Analog Dialogue, Vol. 38, August 2004)
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.