The STMicroelectronics STW81103 is an integrated RF synthesizer with voltage controlled oscillators (VCOs). Showing high performance, high integration, low power, and multi-band performances, STW81103 is a low cost one chip alternative to discrete PLL and VCOs solutions.

STW81103 includes an Integer-N frequency synthesizer and two fully integrated VCOs featuring low phase noise performance and a noise floor of -155dBc/Hz. The combination of wide frequency range VCOs (thanks to center frequency calibration over 32 sub-bands) and multiple output options (direct output, divided by 2 or divided by 4) allows to cover the 625MHz-762.5MHz, the 1087.5MHz-1525MHz, the 2175MHz-3050MHz and the 4350MHz-5000MHz bands.

The STW81103 is designed with STMicroelectronics advanced 0.35μm SiGe process.

意法半導(dǎo)體的stw81103是一個集成的射頻合成器和壓控振蕩器（VCO）。呈現(xiàn)出高性能、高集成度、低功耗、多樂隊演出，stw81103是一種低成本的單芯片替代PLL和VCO的離散的解決方案。

stw81103包括頻率合成器和完全集成的壓控振蕩器具有低相位噪聲性能和噪聲地板- 155dbc /赫茲。寬頻率范圍的壓控振蕩器的組合（由于中心頻率校準(zhǔn)過的32個子帶）和多個輸出選項（直接輸出，除以2或除以4）可以覆蓋625mhz-762.5mhz，的1087.5mhz-1525mhz，的2175mhz-3050mhz和4350mhz-5000mhz帶。

意法半導(dǎo)體的stw81103設(shè)計先進的0.35μm SiGe工藝。

Key Features

• Integer-N frequency synthesizer

• Dual differential integrated VCOs with automatic center frequency calibration:

  2500 - 3050 MHz (direct output)4350 - 5000 MHz (direct output)1250 - 1525 MHz (internal divider by 2)2175 - 2500 MHz (internal divider by 2)625 - 762.5 MHz (internal divider by 4)1087.5 - 1250 MHz (internal divider by 4)

• Excellent integrated phase noise

• Fast lock time: 150μs

• Dual modulus programmable prescaler (16/17 or 19/20)

• 2 programmable counters to achieve a feedback division ratio from 256 to 65551 (prescaler 16/17) and from 361 to 77836 (prescaler 19/20).

• Programmable reference frequency divider (10 bits)

• Phase frequency comparator and charge pump

• Programmable charge pump current

• Digital lock detector

• Dual digital bus interface: SPI and I²C bus (fast mode) with 3 bit programmable address (1100A₂A₁A₀)

• 3.3V power supply

• Power down mode (hardware and software)

• Small size exposed pad VFQFPN28 package 5mm x 5mm x 1.0mm

• Process: BICMOS 0.35μm SiGe

主要特點

頻率合成器

自動中心頻率校準(zhǔn)的雙差分VCO的集成：2500 - 3050 MHz（直接輸出）4350 - 5000兆赫（直接輸出）1250 - 1525 MHz（2內(nèi)部分頻器）2175 - 2500 MHz（2內(nèi)部分頻器）625 - 762.5 MHz（4內(nèi)部分頻器）1087.5 - 1250 MHz（4內(nèi)部分頻器）

良好的綜合相位噪聲

快速鎖定時間：150μS

雙模量可編程分頻器（16 / 17或19 / 20）

2可編程計數(shù)器來實現(xiàn)反饋分頻比從256到65551（預(yù)分頻器的16 / 17）和從361到77836（預(yù)分頻器的19 / 20）。

可編程參考分頻器（10位）

相位頻率比較器和電荷泵

可編程電荷泵電流

數(shù)字鎖相檢測器

雙數(shù)字總線接口：SPI和I2C總線（快速模式）與3位可編程的地址（1100a2a1a0）

3.3V的電源

掉電模式（硬件和軟件）

小規(guī)模的接觸墊vfqfpn28包5mm×5mm×1.0mm

0.35μm SiGe BiCMOS工藝：