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对CS5504系列A D转换器片上门晶振工作及相关应用的介绍
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2009-06-11
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Most A/D converters require a clock source for operation. Some converters, such as the
CS5101A, CS5102A, CS5501/3, and the CS5504/5/6/7/8/9 include an on-chip gate
oscillator as shown in Figure 1. A Pierce-oscillator architecture is commonly used.
It is constructed with either on-chip loading capacitors (C2 and C3 in Figure 1) or it may
require off-chip loading capacitors (C4 and C5) depending upon the crystal frequency. The data sheet for the particular A/D converter should give instructions regarding the size of any
external loading capacitors.
CS5101A, CS5102A, CS5501/3, and the CS5504/5/6/7/8/9 include an on-chip gate
oscillator as shown in Figure 1. A Pierce-oscillator architecture is commonly used.
It is constructed with either on-chip loading capacitors (C2 and C3 in Figure 1) or it may
require off-chip loading capacitors (C4 and C5) depending upon the crystal frequency. The data sheet for the particular A/D converter should give instructions regarding the size of any
external loading capacitors.
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