STMicroelectronics STW81103 RF Synthesizer

STMicroelectronics’ (NYSE:STM) STW81103 is a RF synthesizer with integrated voltage-controlled oscillators (VCOs). it features the highest frequency coverage in the market. The 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. Among the applications in which these devices may find application are wireless network infrastructures, CATV systems, instrumentation, and test equipment.

ST’s STW81103 offers the industry’s best phase-noise performance for single-chip RF synthesizers, with measured 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. Outstanding 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 minimized bit-error rates in voice and data transmission.

STMicroelectronics STW81103 RF SynthesizerIn addition to broad spectrum coverage of up to 5GHz, the STW81103′s embedded VCOs with automatic center-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. Among competing solutions, ST’s family of integrated RF synthesizers needs just three devices (STW81101, STW81102, and STW81103) to cover the largest frequency range, from 625MHz to 5GHz.

While 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 simplified supply chain for equipment manufacturers.

Pin-to-pin compatible with other members of ST’s STW8110x family, the STW81103 is supplied in VFQFN-28 lead-free packages. Samples are available now, with volume production slated for early Q1 2008 at a price of $5.39 in quantities of 1,000 pieces. Customers can order evaluation kits that include the STWPLLSim software, a powerful simulation tool that enables very fast and accurate PLL design and optimization of the use of the STW8110x devices.

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