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.

意法半导体的stw81103是一个集成的射频合成器和压控振荡器（VCO）。呈现出高性能、高集成度、低功耗、多乐队演出，stw81103是一种低成本的单芯片替代PLL和VCO的离散的解决方案。

stw81103包括频率合成器和完全集成的压控振荡器具有低相位噪声性能和噪声地板- 155dbc /赫兹。宽频率范围的压控振荡器的组合（由于中心频率校准过的32个子带）和多个输出选项（直接输出，除以2或除以4）可以覆盖625mhz-762.5mhz，的1087.5mhz-1525mhz，的2175mhz-3050mhz和4350mhz-5000mhz带。

意法半导体的stw81103设计先进的0.35µm SiGe工艺。

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

主要特点

频率合成器

自动中心频率校准的双差分VCO的集成：2500 - 3050 MHz（直接输出）4350 - 5000兆赫（直接输出）1250 - 1525 MHz（2内部分频器）2175 - 2500 MHz（2内部分频器）625 - 762.5 MHz（4内部分频器）1087.5 - 1250 MHz（4内部分频器）

良好的综合相位噪声

快速锁定时间：150µS

双模量可编程分频器（16 / 17或19 / 20）

2可编程计数器来实现反馈分频比从256到65551（预分频器的16 / 17）和从361到77836（预分频器的19 / 20）。

可编程参考分频器（10位）

相位频率比较器和电荷泵

可编程电荷泵电流

数字锁相检测器

双数字总线接口：SPI和I2C总线（快速模式）与3位可编程的地址（1100a2a1a0）

3.3V的电源

掉电模式（硬件和软件）

小规模的接触垫vfqfpn28包5mm×5mm×1.0mm

0.35µm SiGe BiCMOS工艺：