When selecting the right crystal for your product, it’s critical to consider the equivalent series resistance (ESR). For the most part, ESR is determined by the size and frequency of the crystal. You need to fulfill ESR to achieve stable oscillation.
In general, the higher the ESR value of the crystal, the more difficult it is to maintain oscillation. How do you counter it to attain stability? What may be the exceptions? Epson’s Designer’s Guide to Common Considerations When Selecting a MHz Crystal will point you to what to look for when it comes to ESR. From mitigating additional ESR to common design tradeoffs and solutions, we can help determine the right crystal for your product.
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