NXP TDA18218HN DVB-T电视硅调谐方案

NXP 公司的TDA18218HN是 DVB-T电视用的硅调谐器IC,集成了全部的调谐功能,包括选择性和提供低IF输出信号. TDA18218HN采用综合的IF滤波器,支持6MHz,7MHz以及8MHz的信道带宽,单电源3.3V工作,I2C总线接口.外接元件仅为16MHz的晶振,用作时钟发生器,主要用在DVB-T机顶盒(STB)和TV接收器.本文介绍了TDA18218HN的主要特性,方框图以及典型应用框图.
The TDA18218HN is a Silicon Tuner IC designed for digital terrestrial (DVB-T) TV reception. The TDA18218HN integrates the overall tuning function, including selectivity and provides a low-IF output signal.
The TDA18218HN uses integrated IF filters to support 6 MHz, 7 MHz or 8 MHz channel bandwidths. The TDA18218HN requires only one single 16 MHz crystal for clock generation. A clock signal is available on crystal oscillator output pins (XTO_P / XTO_N) to synchronize the channel decoder.
The TDA18218HN is a low cost Silicon Tuner targeting digital terrestrial applications. The TDA18218HN matches the performance of the conventional can tuners. Additionally, the following benefits can be stated:
• Easy on-board integration
• Drastically reduces:
– the size of the tuner function
– the power consumption
TDA18218HN主要特性:
Fully integrated IF selectivity; eliminating the need for external SAW filters
Fully integrated oscillators with no external components
Integrated wideband gain control
Alignment free
RF loop-through for easy implementation in the Set-Top Box (STB)
Integrated die thermal sensor
Single 3.3 V power supply
Low power consumption (750 mW)
Crystal oscillator output buffer (16 MHz) for single crystal applications
I2C-bus interface compatible with 3.3 V and 5 V microcontrollers
Three Standby modes
RoHS packaging
TDA18218HN应用:
DVB-T Set-Top Box (STB) and TV receiver
System application optimization is described in the application note AN0814
Driver application is described in the application note AN0822

图1.TDA18218HN方框图

图2.TDA18218HN应用框图
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