国产微拍无码精品一区每日不定時更新_一区2区欧美日韩_午夜在线免费看毛片_双人床上扑克牌软件免费_亚洲福利片欧美日韩一线相关内容首页_一级做a爱过程免费视频无码系列_大鸡巴操小穴视频_不打马赛克的荒野生存21天美版_91久久国产亚洲精品超碰热_自慰网大全在线观看

        The SD2085 is a CMOS single chip modem IC used in Highway Addressable Remote Transducer (HART) field instruments and masters. This IC integrates all necessary filtering, signal detection, modulating, demodulating, and HART signal wave shaping functions. Thus it requires few external passive components to satisfy the HART physical layer requirements.
        The SD2085 uses phase continuous Frequency Shift Keying (FSK) at 1200 bps, and operates in half duplex mode per HART protocol. The maximum supply current consumption in transmit mode is 85μA while using 3.6864MHz external Clock source input and 3.6V power supply.
        The input HART signal is sampled by an analog to digital converter (ADC), followed by a digital filter and demodulator. This architecture ensures reliable signal detection in noisy environments. A digital to analog converter (DAC) is used to output 1200Hz and 2200Hz phase continuous trapezoid waveforms.
        Required board space is very small because of the 5mm x 5mm QFN package and very few external components needed, making it ideal for line-powered applications in both master and slave configurations.