Synthesiser provides low phase noise

Analog Devices' ADF4157 25bit fixed-modulus divider provides ultra-fine frequency resolution.

Analog Devices has released the ADF4157, a high-frequency, fractional-N PLL synthesiser for applications that require low phase noise and ultra-fine-tuning resolution, such as satellite communications, private mobile radios (PMR), instrumentation and wireless base station equipment, including those that support GSM, PCS, DCS, WiMAX, CDMA and W-CDMA networks.

The 25bit fixed-modulus divider provides ultra-fine frequency resolution.

Design and simulation software is available free of charge as a download from Analog Devices' website.

"ADI's PLL synthesiser portfolio now spans from 5MHz to 8GHz with more than five new PLLs released in the last year", said David Boylan, Business Director, RF Limerick, Analog Devices.

"The PLLs are supported by the ADIsimPLL simulation design aid, which thousands of wireless systems designers are now using to speed their synthesiser developments".

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