Product category:
Communications ICs (Wireless)
News Release from: STMicroelectronics | Subject: STW81103
Edited by the Electronicstalk Editorial
Team on 11 September 2007
RF synthesiser covers wide frequency
range
ST's family of integrated RF synthesisers needs three devices to cover a frequency range of 625MHz to 5GHz.
STMicroelectronics has released a RF synthesiser with integrated voltage-controlled oscillators (VCOs) with the highest frequency coverage in the market ST's STW81103 is the first single-chip device that operates up to 5GHz, meeting the increasing demand of equipment manufacturers for space and cost-efficient solutions in radio applications with frequencies in the microwave range
This article was originally published on Electronicstalk on 8 Nov 2004 at 8.00am (UK)
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Frequency synthesisers form the basis of most radio designs and their performance affects the operation of the overall system.
The leading requirements for signal-generating components in today's communications equipment include minimised phase noise and broadband frequency coverage.
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ST's STW81103 exhibits phase-noise performance values of 0.27 degrees RMS (root mean square) at 1.16GHz, 0.6 degrees RMS at 2.33GHz, and 1.5 degrees RMS at 4.67GHz with a frequency step of 200kHz.
Suppression of random frequency fluctuations in a signal provides more design margin and the low phase noise also satisfies the stringent requirements of system manufacturers for minimised bit-error rates in voice and data transmission.
In addition to broad spectrum coverage of up to 5GHz, the STW81103's embedded VCOs with automatic centre-frequency calibration provide outstanding multi-band functionality.
A single device spans frequency bands from 625 to 762.5MHz, 1087.5 to 1525MHz, 2175 to 3050MHz and 4350 to 5000MHz, allowing wireless system suppliers to use the device in wideband and multi-band applications.
ST's family of integrated RF synthesisers needs just three devices (STW81101, STW81102, and STW81103) to cover a frequency range of 625MHz to 5GHz.
Whereas existing solutions for microwave frequencies require discrete phase-locked loop (PLL) devices and voltage-controlled oscillators (VCOs), ST's single-chip approach reduces both the bill-of-materials and footprint by as much as 70%.
Other benefits of the monolithic synthesizer include an increase in device reliability and a simplified supply chain for equipment manufacturers.
"ST's unparalleled combination of a world-class RF technology, solid design skills, and leading-edge components results in dramatic savings in material costs and board space, which are the key concerns of wireless equipment manufacturers today", said Guillaume Pertinant, RF Technical Marketing Manager at ST's Communication Infrastructure Division.
"With the broadest band-coverage in the market, our single-chip synthesisers are set to spearhead the development of cost-efficient applications in the microwave range".
Pin-to-pin compatible with other members of ST's STW8110x family, the STW81103 is supplied in VFQFN-28 lead-free packages.
Customers can order evaluation kits that include the STWPLLSim software, a simulation tool which enables very fast and accurate PLL design and optimisation of the use of the STW8110x devices.
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