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高达5.3KHz的多路信号转换到CS5180 A D转换器的
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2009-06-11
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The CS5180 is a high-speed Delta-Sigma analogto-digital converter capable of a 400 ksamples/second output word rate and incorporating a 4,265 tap digital filter. If signals are to be multiplexed into the A/D converter, then the digital filter will require at least 74 output words to settle to its rated accuracy. This normally requires that a microcontroller
would be required to either count and discard the invalid output words or to use a
programmable timer to provide the required time delay before taking the valid reading. The CS5180 has been designed with a unique feature, a SYNC input that can simplify the task of multiplexing by releiving the microcontroller of the task of counting words or time delays. This application note describes two techniques that can be used with the
CS5180 to multiplex signals at up to a 5.3 kHz rate.
would be required to either count and discard the invalid output words or to use a
programmable timer to provide the required time delay before taking the valid reading. The CS5180 has been designed with a unique feature, a SYNC input that can simplify the task of multiplexing by releiving the microcontroller of the task of counting words or time delays. This application note describes two techniques that can be used with the
CS5180 to multiplex signals at up to a 5.3 kHz rate.
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