STMicroelectronics has unveiled its new integrated RF synthesizers with embedded voltage-controlled oscillators, low integrated phase noise and large band coverage. ST’s synthesizers are single-chip devices with available output frequency above 3.0 GHz. The measured values of the STW81101 and STW81102 are 0.2° RMS (Root Mean Square) at 1 GHz, 0.5° RMS at 2 GHz, and 1.3° RMS at 4 GHz with a frequency step of 200 kHz.
The combination of embedded VCOs (voltage-controlled oscillators) with automatic center-frequency calibration and multiple output options allows the devices to operate in multiple bands, over a spectrum from 750 MHz up to 4.65 GHz.
Versatility of the STW8110x product family is further enhanced by the dual digital interface, with the I²C protocol for connecting multiple devices, complemented with the fast, Serial Peripheral Interface (SPI) bus.
Pin-to-pin compatible with its predecessor (STW81100), the STW81101 and STW81102 synthesizers are supplied in QFN-28 lead-free packages. The evaluation kits include an evaluation board, the STWPLLSim software for PLL filter design and noise simulation, the programming GUI (Graphical User Interface), and the guidelines for application board design.
Evaluation kits and production devices will be available in May 2006. The STW81101 and STW81102 will be sold at a price of $3 in volume.
