Si2155：新一代硅調(diào)諧器詳細介紹
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Si2155基于SiliconLabs公司專利技術(shù)的電視調(diào)諧器架構(gòu)，提供超清晰模擬和數(shù)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(zhì)跟蹤濾波電感器，SiliconLabs公司新一代電視調(diào)諧器具有業(yè)界最高的抗干擾能力，可以在城區(qū)接收最多的模擬和數(shù)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(diào)諧特性，即使在遠離發(fā)射臺的鄉(xiāng)村區(qū)域也能做到這一點。
Si2155 電視調(diào)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(shù)量、支持低成本的外部器件，Si2155電視調(diào)諧器使電視制造商有效降低系統(tǒng)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(tǒng)分立式基于MOPLL的調(diào)諧器方案相比，基于Si2155的設(shè)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(diào)諧器需要使用跟蹤濾波電感器，這使得混合調(diào)諧器的設(shè)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(xiàn)具有成本效益的板上調(diào)諧器設(shè)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
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