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Digital Step Attenuators

June 2007

Specific capabilities brought to bear on the DSA products from Peregrine Semiconductor include:

Digital Step Attenuators - 34407 PE430x Monolithic RF UltraCMOS

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Digital Step Attenuators New PE4309 maintains IP3 @ 52 dBm from DC – 4 GHz with 3V – 5V V

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The PE430x family of Digital Step Attenuators (DSAs) features unprecedented levels of broadband linearity, attenuation accuracy and programming flexibility which provide exquisite design solutions for today’s prolific RF applications. Peregrine’s first commercial DSA product line has raised the bar on DSA performance. Manufactured on the Company’s proprietary UltraCMOS™ silicon-on-sapphire process technology, the products draw from many years of high- performance RF CMOS and mixed-signal IC experience. Industry-leading attenuation accuracy High ESD tolerance: up to 2kV HBM Single +3.0 volt supply High linearity to near DC Serial and parallel interface logic Industry leading insertion loss of 1.5 dB Preset power-up attenuation states, a function afforded due to the monolithic CMOS fabrication processThe new PE4309 operates from DC- 4GHz and is the latest in the DSA series. This device delivers unprecedented linearity (52 dBm) across the device’s entire broadband range; high ESD tolerance (2 kV HBM); and operates with Vdd from 3V to 5V while maintaining exceptional RF performance. This allows the use of a single device in both the RF and IF radio sections to save board space and cost.The extraordinary performance of the Peregrine DSAs, including high accuracy and IP3 down to 100 KHz, makes them ideal for new designs. Return Loss (RL) for the PE4302 is better than 15 dB through 2.2 GHz, making it 5 to 6 dB better than its competitors and uniquely compatible with termination sensitive components. Compared to GaAs solutions, they offer higher IP3, accuracy, better temperature stability, lower distortion, ESD Protection, no blocking caps and lower power consumption. These aspects combine for optimal performance and cost-effectiveness.

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APPLICATIONS

The devices are ideal for many RF applications such as: Cellular base stations and repeaters Fixed frequency transceivers Power amplifier distortion canceling loops CATV headend and distribution systems High performance military radio See our Wireless Design & Development article posted at www.psemi.com
Input IP3 (dBm) 0dB2dB16dB1dB8dB0.5dB4dB31.5dB Att e nuation S e ttings

TECHNICAL SUPPORTAND ORDER INFORMATION

Products samples, unit pricing and volume production are available now through Peregrine and its worldwide distributors. Visit us online to find a sales office near you.

0500100015002000

RF Frequency (MHz)