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7477 Datasheet(PDF) 271 Page - Renesas Technology Corp |
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7477 Datasheet(HTML) 271 Page - Renesas Technology Corp |
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271 / 354 page  7470/7471/7477/7478 GROUP USER’S MANUAL 2-36 APPLICATION 2.5 A-D converter 7470 7471 7477 7478 2.5.2 Application examples (1) A-D conversion value determination methods For improvement of the accuracy of A-D conversion results, we recommend you perform sampling several times to determine a value. The following A-D conversion value sampling methods are available (m, n: Arbitrary values based on the specification). Example: 1Sampling 2n times 2Moving sampling 2n times 3Sampling (2n + 2) times For value determination, the following methods are available. Example: [1] The sum of sampling result is divided by sampling times. [2] After execution of sampling (2n + 2) times, the minimum value and the maximum value are excluded and then the remaining values are added and then divided by 2n times. [3] When updating the average value calculated by [1]or [2], this average value is not updated if the difference from the previous value is ± m or more. In “2.5.2 Application examples, (2) Example of A-D conversion setting,” an example of using the sampling methods 2 + 3 and the determination method [3] is shown. ,,,, |
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