Si2155：新一代硅調諧器詳細介紹

Si2155基于SiliconLabs公司專利技術的電視調諧器架構，提供超清晰模擬和數字廣播電視接收。通過提供卓越的線性特性和完全集成的高品質跟蹤濾波電感器，SiliconLabs公司新一代電視調諧器具有業界最高的抗干擾能力，可以在城區接收最多的模擬和數字電視頻道。Si2155集成電路的RF前端也提供了無與倫比的靈敏度性能和一致的調諧特性，即使在遠離發射臺的鄉村區域也能做到這一點。

　　Si2155 電視調諧器具有緊湊的5mm×5mmQFN封裝，通過最小化電路板尺寸和器件數量、支持低成本的外部器件，Si2155電視調諧器使電視制造商有效降低系統成本。Si2155IC集成了完整的從RF輸入到IF輸出的信號路徑。與傳統分立式基于MOPLL的調諧器方案相比，基于Si2155的設計減少了超過 100個的外圍器件，包括低噪聲放大器（LNA）、聲表面波（SAW）濾波器，也不像其他硅調諧器需要使用跟蹤濾波電感器，這使得混合調諧器的設計最簡便、BOM成本最低。Si2155也支持采用低成本的外部器件來實現具有成本效益的板上調諧器設計方案。

　　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