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resources:technical-guides:surge [12 Aug 2022 16:14] – s valerie hamilton | resources:technical-guides:surge [09 Sep 2022 12:07] (current) – s valerie hamilton | ||
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- | ====Surge Test Results==== | + | ====AD74115H |
The surge immunity test indicates the capability of the device or equipment to survive surges caused by events such as lightning strikes or industrial power surges caused by switching heavy loads or short-circuit fault conditions. | The surge immunity test indicates the capability of the device or equipment to survive surges caused by events such as lightning strikes or industrial power surges caused by switching heavy loads or short-circuit fault conditions. | ||
- | Per the IEC 61000-4-5 standard for industrial environments, | + | Per the IEC 61000-4-5 standard for industrial environments, |
- | The CDNs do not influence the specified functional conditions of the EUT. The interconnection line between the EUT and the CDN is 2 m in length or shorter | + | The CDNs (coupling decoupling network) |
===Table 1 IEC 61000-4-5 Surge Test Levels=== | ===Table 1 IEC 61000-4-5 Surge Test Levels=== | ||
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===Hardware Configuration=== | ===Hardware Configuration=== | ||
- | The use cases tested during surge testing were voltage output (and by default | + | The use cases tested during surge testing were voltage output (and voltage input by reconfiguring the ADC input nodes), internal digital output sourcing and sinking. The external sense pins SENSE_EXT1 and SENSE_EXT2 were also subject to testing. The reasoning for these particular use cases were to ensure the integrity of the I/O and sense screw terminals along with the internal fets used for the internal digital output use case. The surge was coupled to each screw terminal one at a time with respect to IO_N (AGND). Unshielded cable was used for all use cases. |
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===Performance Summary=== | ===Performance Summary=== | ||
- | Table 2 gives a summary of the surge test results. For the digital output use cases a deviation is not recorded as the accuracy is dependent on the load. The test verified that the digital output did not turn off unexpectedly. The ADC conversion error bit in the Alert Status register was set after each test indicating that the surge voltage was observed on the pin. | + | Table 2 gives a summary of the surge test results. For the digital output use cases a deviation is not recorded as the accuracy is dependent on the load. The test verified that the digital output did not turn off unexpectedly. The ADC conversion error bit in the Alert Status register was set after each test. The ADC error indicates a saturation error (ADC measurement is reading full scale) |
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===Table 2 Surge Results=== | ===Table 2 Surge Results=== | ||
- | ^ Test Level ^ Use Case ^ Pre Test Measurement^ | + | ^ Test Level ^ Use Case ^ Pre Test Measurement |
- | | 1 kV | Voltage Output | + | | 1 kV | Voltage Output |
- | | ::: | SENSE EXT1 | + | | ::: | SENSE EXT1 |
- | | ::: | SENSE EXT2 | + | | ::: | SENSE EXT2 |
| ::: | Digital Output Internal Source | | ::: | Digital Output Internal Source | ||
| ::: | Digital Output Internal Sink | 22.49 mA | 22.49 mA | N/A | Class B | | | ::: | Digital Output Internal Sink | 22.49 mA | 22.49 mA | N/A | Class B | | ||
- | | − 1 kV | Voltage Output | + | | − 1 kV | Voltage Output |
- | | ::: | SENSE EXT1 | + | | ::: | SENSE EXT1 |
- | | ::: | SENSE EXT2 | + | | ::: | SENSE EXT2 |
| ::: | Digital Output Internal Source | | ::: | Digital Output Internal Source | ||
| ::: | Digital Output Internal Sink | 22.49 mA | 22.49 mA | N/A | Class B | | | ::: | Digital Output Internal Sink | 22.49 mA | 22.49 mA | N/A | Class B | | ||
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