Analog Devices' New Circuit Simulation Tool Simplifies Clock Design for Communications, Imaging, and Instrumentation Applications.

NORWOOD, Mass. -- Analog Devices, Inc. (NYSE: ADI), a global leader in high-performance semiconductors for signal processing applications, today announced the availability of its new ADIsimCLK(TM) clock IC design and simulation tool, along with the addition of three new clock ICs to its growing portfolio of clock products. ADIsimCLK offers clock and timing engineers an easy-to-use simulation tool for designing and analyzing clock circuits used in a broad range of applications, such as wireless transceivers, broadband infrastructure, medical imaging, general instrumentation, and automated test equipment. By using the tool's tutorials, design wizards, and user-friendly data entry screens, engineers can now create complete, robust timing solutions in minutes. And because ADIsimCLK models the phase noise and jitter of the components used, final system performance can be predicted with great accuracy, allowing designers to move from simulations to final board layouts faster, removing iterations from the design process and speeding time to market. The new tool is offered as a free download from ADI's website at www.analog.com/ADIsimCLK.

The availability of ADIsimCLK coincides with the introduction of Analog Devices' newest clock IC family members - the AD9513, AD9514 and AD9515 - that extend output clock rates to 1.6 GHz. The new pin-programmable ICs feature high integration in small packages to eliminate the need for multiple discrete components, save on board space, and ultimately reduce BOM (bill of materials) costs. Like preceding members of Analog Devices' AD95xx clock family, the new clock ICs feature ultra-low jitter performance which can improve SNR (signal-to-noise ratio) by 6 to 12 dB in wireless infrastructure, instrumentation, and broadband networking systems.

"Use of low-phase-noise, low-jitter clock ICs reduces overall noise in a signal path," said Kevin Kattmann, product line director, High Speed Converters, Analog Devices. "However, optimizing clock solutions can be painstaking and time consuming. The ADIsimCLK tool was created to simplify the clock distribution design process by allowing customers to analyze and test critical timing circuits before committing to hardware, reducing risk and shortening development time. The ICs introduced today help customers who need a better way to distribute low jitter clocks across a crowded PCB to multiple sub-circuits. Customers can now route common clock frequencies up to 1.6 GHz to the AD9513/14/15, which perform divides, phase offsets, and delays in close proximity to the circuits needing clocks. The small packages allow customers to save on board space and cost, while improving their overall system performance."

ADIsimCLK Simulates Jitter of Less Than 1 Picosecond RMS

Based on ADI's popular ADIsimPLL(TM) tool for low-phase-noise PLL synthesizer design, ADIsimCLK is the first tool of its kind to simulate jitter of less than 1 picosecond rms and phase noise less than -150 dBc/Hz. ADIsimCLK simplifies loop filter design and optimization and enables customers to test the functionality and performance of Analog Devices' family of low jitter clock ICs without touching any hardware.

The tool features a data panel that allows designers to alter loop bandwidths, change charge pump currents, set divide ratios, adjust delays, and choose output drivers. The tool's result panel displays overall frequency response, timing diagrams, schematics, and provides detailed performance data on each individual clock output. Equipped with a library of references, VCOs and VCXOs, ADIsimCLK allows the designer to observe exactly how each component affects the clock distribution design at the touch of a button.

Pin-programmability Makes Clocks Easy to Design In

Packaged in a small 32-lead LFCSP (lead frame chip scale package), the AD9513, AD9514 and AD9515 can be placed close to devices requiring clocks. All three products feature 4-level logic pins that are used to program divide ratios, phase offsets, delays and output logic levels. This pin programmability means that no serial port is required for device setup, making it easy for designers to drop the new ICs into existing circuits. All that is required for operation is a single +3.3 V supply.

Like other members of the AD95xx family, the AD9513, AD9514 and AD9515 improve a system's overall noise performance by maintaining additive jitter levels of less than 300 fs (femtoseconds) rms. Superior clock output isolation greatly reduces susceptibility to noise, as compared to competitive solutions.

ADI's distribution ICs feature LVPECL outputs, as well as user-selectable LVDS (low-voltage differential signaling) and CMOS (complementary metal-oxide semiconductor) options. All three products feature divide ratios in the range of 1 to 32, and user-selectable phase offsets. LVPECL outputs operate up to 1.6 GHz with additive jitter of just 225 fs rms.

Availability and Pricing

The AD9514 and AD9515 are available in full production, and the AD9513 is sampling with full production quantities available in early September 2005. The 3-channel AD9513 and AD9514 are priced at $5.95 per unit in 1,000-piece quantities, with the 2-channel AD9515 priced at $4.75 per unit in 1,000-piece quantities. All three AD951x products are specified to operate over the extended industrial temperature range of -40 degrees C to +85 degrees C. For more information, please visit http://www.analog.com/clocks.

About Analog Devices

Innovation, performance, and excellence are the cultural pillars on which Analog Devices has built one of the most long-standing, high-growth companies within the technology sector. Acknowledged industry-wide as the world leader in data conversion and signal conditioning technology, Analog Devices serves over 60,000 customers around the world, representing virtually all types of electronics equipment. Celebrating 40 years as a leading global manufacturer of high-performance integrated circuits used in analog and digital signal processing applications, Analog Devices, Inc. is headquartered in Norwood, Massachusetts, and employs approximately 8,900 people worldwide. It has manufacturing facilities in Massachusetts, California, North Carolina, Ireland, and the Philippines. Analog Devices' common stock is listed on the New York Stock Exchange and ADI is included in the S&P 500 Index.

Note: ADIsimCLK(TM) and ADIsimPLL(TM) are trademarks of Analog Devices, Inc.