更多信息 - 无线主页 - 应用笔记和技术讲座 - 评估板软件 - 技术支持   Abstract: The MAX3541 is an integrated, single-conversion terrestrial tuner IC for DVB-T and PAL. The device is designed to convert input signals in the VHF-Low, VHF-High, and UHF bands to an IF frequency of 36MHz. The MAX3541 is designed for television, analog/digital terrestrial receiver, and digital set-top box applications. Figure 1. The MAX3541 DVB-T/PAL tuner. Figure 2. Tuner system block diagram. Lab Measurements DVB-T system performance for the MAX3541 with a DVB-T demodulator complies with the NorDig 1.0.2 specification. Typical UHF sensitivity is -81dBm. Figure 3 shows system immunity to digital interferers. These measurements are for DVB-T with 64QAM, 2/3 code rate, 8MHz bandwidth, 8k mode, and 1/4 guard interval. Figure 3. Data shows the immunity to digital interferers. This performance satisfies the NorDig 1.0.3 standard with 2.8dB margin. DVB-T/PAL Terrestrial Frequency Plan Figure 4. The DVB-T/PAL signal is broadcast in the VHF Low, VHF High, and UHF bands as shown above. Channel spacing is 7MHz in the VHF bands and 8MHz in the UHF band. Detailed Description The MAX3541 is a complete single-conversion television tuner designed for use in analog/digital terrestrial applications and digital set-top boxes. This television tuner draws only 760mW of power from a +3.3V supply voltage. The MAX3541 is designed to convert PAL or DVB-T signals in the 47MHz to 68MHz, 174MHz to 230MHz, and 470MHz to 862MHz bands to an IF frequency of 36MHz. The MAX3541 includes a variable-gain low-noise amplifier, multiband tracking filters, a harmonic-rejection mixer, a low-noise IF amplifier, an IF power detector, and a variable-gain IF amplifier. The MAX3541 also includes fully monolithic VCOs and tank circuits, as well as a complete frequency synthesizer. This highly integrated design allows for low-power tuner-on-board applications without the cost and power-dissipation issues of dual-conversion tuner solutions. The MAX3541 is specified for operation in the -40°C to +85°C temperature range and is available in a leadless 48-pin flip-chip (fcLGA) package. 相关型号   APP 4175: May 23, 2008 MAX3541 完备的一次变频电视调谐器 完整的数据资料 (PDF, 256kB) 自动更新 需要自动接收最新发布的应用笔记吗？请订阅EE-Mail™ (English only)。 我们期待您的反馈！ 喜欢？不喜欢？有待改善？或为我们提供建议？请与我们联系 — 我们将根据您的意见或建议改善我们的工作。 网页评价或提供建议   下载，PDF格式 (98kB)  AN4175, AN 4175, APP4175, Appnote4175, Appnote 4175