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71M651X Crystal Frequency Variations

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  • 标      签: Crystal

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The Teridian single- or 3-phase energy-measurement ICs, used in conjunction with an external 32786Hz crystal, generate frequencies that may slightly vary. This application note explains the reason for the frequency deviation and discusses methods that minimize this effect.   Frequency Deviation between 3.3V Supply and Battery Supply Factors Determining the Oscillation Frequency The ICs of the 71M651X Energy Meter Family use an external crystal to generate all internal clocks. This crystal is connected to the IC as shown in Figure 1, using two external capacitors The oscillator frequency is determined by several factors, such as crystal parameters, capacitor values, the oscillator circuit, and trace and pin capacitance.
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