NXP TDA18271HD硅调谐方案

NXP 公司的TDA18271HD硅调谐器集成了包括选择性在内的整个调谐功能,主要用于模拟和数字电视接收. TDA18271HD集成了RF跟踪滤波器和IF选择电路,满足世界上多个地面电视标准,3.3V电源,可用在PCTV,DVD-R和TV的混合(数字和模拟TV)TV中.本文介绍了TDA18271HD的主要特性,方框图以及在PCTV的DVB-T双调谐接收方案, 在PCTV中混合接收应用框图以及测试电路图.

The TDA18271HD is a Silicon Tuner IC designed mainly for terrestrial analog and digital TV reception. The TDA18271HD integrates the overall tuning function, including selectivity.

The TDA18271HD is compatible with all analog and digital TV standards and delivers alow IF signal to a demodulator (for analog TV) and/or channel decoder (for digital TV).

TDA18271HD主要特性:

Fully integrated RF tracking filters for unwanted signal suppression

Fully integrated IF selectivity (no need for external SAW filters)

Worldwide multistandard terrestrial (all analog and digital worldwide terrestrial standards supported)

Integrated loop-through and slave tuner output for straightforward multi-Silicon Tuner application

Fully integrated oscillators with no external components

Alignment free

Integrated wide-band gain control

Single 3.3 V power supply

Low power consumption

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

TDA18271HD目标应用:

Hybrid (analog and digital TV) for PCTV, DVD-R and TV applications

Application optimization is described in application notes AN602, AN604 and AN605



图1. TDA18271HD方框图



图2.TDA18271HD在PCTV的DVB-T双调谐接收方案



图3.TDA18271HD在PCTV中混合接收应用框图



图4.TDA18271HD测试电路