Si2155：新一代硅调谐器详细介绍

　　Si2155 基于SiliconLabs公司专利技术的电视调谐器架构，提供超清晰模拟和数字广播电视接收。通过提供卓越的线性特性和完全集成的高品质跟踪滤波电感器，SiliconLabs公司新一代电视调谐器具有业界最高的抗干扰能力，可以在城区接收最多的模拟和数字电视频道。Si2155集成电路的RF前端也提供了无与伦比的灵敏度性能和一致的调谐特性，即使在远离发射台的乡村区域也能做到这一点。

　　Si2155 电视调谐器具有紧凑的5mm×5mmQFN封装，通过最小化电路板尺寸和器件数量、支持低成本的外部器件，Si2155电视调谐器使电视制造商有效降低系统成本。Si2155IC集成了完整的从RF输入到IF输出的信号路径。与传统分立式基于MOPLL的调谐器方案相比，基于Si2155的设计减少了超过 100个的外围器件，包括低噪声放大器（LNA）、声表面波（SAW）滤波器，也不像其他硅调谐器需要使用跟踪滤波电感器，这使得混合调谐器的设计最简便、BOM成本最低。Si2155也支持采用低成本的外部器件来实现具有成本效益的板上调谐器设计方案。

　　描述：

　　The Si2155 integrates a complete hybrid TV tuner supporting all worldwide terrestrial and cable TV standards. Leveraging Silicon Labs’ field proven digital low-IF architecture， the Si2155 maintains the unmatched performance and design simplicity of the Si2153 while further reducing footprint size and bill of materials cost. No external LNAs， tracking filters， wirewound inductors， or SAW filters are used.

　　Compared with competing silicon tuners and discrete MOPLL-based tuners， the Si2155 delivers superior picture quality and a higher number of received stations in crowded and near/far real-world reception conditions. The high linearity and low noise RF front-end delivers superior blocking performance and higher sensitivity in the presence of strong undesired channels and interference.

　　The Si2155 integrates the complete signal path from antenna input to IF outputs for both analog and digital transmission standards. Compared to traditional discrete MOPLL-based tuners， the Si2155 eliminates hundreds of external components including external LNAs， tracking filter varactors and inductors （unlike competing silicon tuners）， and SAW filters， resulting in the simplest， lowest-cost BOM for a hybrid TV tuner.

　　Interfacing the Si2155 seamlessly with the Si2165 DVB-T/C demodulator creates a complete terrestrial and cable DVB-T/C receiver plus PAL/SECAM tuner.

　　特性：

　　Worldwide hybrid TV tuner

　　Analog TV： NTSC， PAL/SECAM

　　Digital TV： ATSC/QAM， DVB-T/T2/C， ISDB-T/C， DTMB

　　42-870 MHz frequency range

　　Compliance to A/74， NorDig， D-Book， C-Book， ARIB， EN55020， OpenCable™ specifications

　　Best-in-class real-world reception

　　Exceeds discrete MOPLL-based tuners

　　Highly integrated， lowest BOM

　　No SAW filters or wirewound inductors required

　　Integrated LNAs and complete tracking filters

　　No alignment， tuning or calibration required

　　Digital low-IF architecture

　　Integrated channel select filters

　　Flexible output interface

　　ALIF to analog TV demodulator or SoC

　　DLIF to digital TV demodulator or SoC

　　3.3 and 1.8 V power supplies

　　Standard CMOS process technology

　　5 x 5 mm， 32-pin QFN package

　　RoHS compliant