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How to read datasheets

Which correctly describes the difference between "absolute maximum ratings" and "recommended operating conditions" in a datasheet?

  1. AWithin the absolute maximum ratings the device will not be damaged, and all values in the electrical characteristics table are also guaranteed as written
  2. BAbsolute maximum ratings are limits beyond which damage may occur; characteristics are guaranteed only within the recommended operating conditions
  3. CRecommended operating conditions are the limits for continuous operation, while absolute maximum ratings are limits that may be used routinely for short periods
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Answer: B. Absolute maximum ratings are limits beyond which damage may occur; characteristics are guaranteed only within the recommended operating conditions

Absolute maximum ratings are limit values that, if exceeded even momentarily, may cause damage or degradation; staying within them only means the device will not be damaged—it does not guarantee correct operation. The values in the electrical characteristics table are guaranteed only within the recommended operating conditions. For example, a 3.3 V device might specify an absolute maximum supply voltage of −0.3 to 4.6 V and recommended operating conditions of 3.0 to 3.6 V. In design, use the device within the recommended operating conditions, and confirm that the absolute maximum ratings are not exceeded even including noise and surges.

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More How to read datasheets questions

  1. On a prototype board, a surge was found that momentarily pushes the supply voltage above its absolute maximum rating. The IC still works normally afterward. Which is the appropriate way to think about this?
  2. Which correctly describes the concept of component "derating"?
  3. Which correctly describes "typ (typical)" in an electrical characteristics table?
  4. A load switch (an IC that turns a power rail on and off) has a current limit specified as min 1.0 A, typ 1.5 A, max 2.2 A. You want to draw up to 1.2 A for the load. Which judgment is correct?
  5. The top of an electrical characteristics table states "Ta = 25 °C, VDD = 3.3 V unless otherwise noted." Which is a correct point to note when reading this table?