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CXA3117N データシート(PDF) 1 Page - Sony Corporation |
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CXA3117N データシート(HTML) 1 Page - Sony Corporation |
1 / 2 page VOICE Achieving Low Power and High Speed in Paging System IF IC for High-Speed Paging Systems CXA3117N, CXA3176N, CXA3179N High-speed paging systems that employ M-ary signals are about to enter service. Sony strongly supports this new service with three IF ICs: the CXA3117N, the CXA3176N, and the CXA3179N. The CXA3117N, which adopts a comparator system that does not re- quire an A/D converter, and the CXA3179N, which supports AFC, can contribute significantly to parts count reductions and thus reduced pro- duction costs. The CXA3176N implements a high-speed paging system that uses an A/D converter and supports AFC. s Low current consumption (CXA3117N/CXA3176N/ CXA3179N) s No A/D converter required in comparator system adopted (CXA3117N/CXA3179N) s AFC support (CXA3176N/ CXA3179N) s RSSI dynamic range: 70 dB, detector output: 600 mVrms (CXA3176N) Low Current Consumption At the same time as incorporating both a comparator that supports M-ary high- speed paging systems and a variable cut- off bit rate filter that responds to changes in the data rate, these products achieve a current consumption that is 20% lower than that of the POCSAG system based CXA1484AN. Comparator System does not Require an A/D Converter In the first generation of M-ary high- speed paging systems, the output of the detector was input to an A/D converter to acquire the two bits of data in the signal. However, the comparator- based system used in these products uses three comparators to perform a signal-processing operation equivalent to A/D conversion and acquire the two bits of digital data. This allows circuits that were previously implemented as two chips, an IF IC and an A/D converter, to be implemented in a single IF IC. AFC Support A circuit that cancels the frequency off- set of the receiver oscillator is required in 900-MHz band paging systems and in narrow band systems. The CXA3176N and CXA3179N include an offset detection circuit that uses S-curve characteristics, and implement an AFC circuit by feeding back the output of this circuit to the first oscillator. I am convinced that the compara- tor system proposed by Sony and used in the CXA3117N and CXA3179N will become the main- stream in M-ary paging systems in the future. I think that once you have tried these devices you will appreciate the validity of this system. Please look into these products for use in your systems. RSSI Dynamic Range: 70 dB, Detector Output: 600 mVrms In addition to providing the extremely wide RSSI dynamic range of 70 dB, the CXA3176N also features excellent tem- perature characteristics. These allow the CXA3176N to be used in a wide range of applications. Furthermore, the CXA3176N detector output operating point is automatically adjusted to achieve an optimal dynamic range in response to the supply voltage. |
同様の部品番号 - CXA3117N |
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同様の説明 - CXA3117N |
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