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Derating/Stress Analysis 331 3. Select a guideline and choose OK; the Derating list opens: 4. In the Derating list, make selections for family and item code; the list displays all existing derating parameters for each type. See the descriptions of available Derating parameters below: Parameter VssSR (%) VinSR (%) CoutSR (%) Fanout Freq.(%) Tcase (°C) CsrgSR(%) VrevSR(%) PSR VSR Description Supply voltage stress ratio in Analog devices Input voltage stress ratio Output current stress ratio Fanout is a measure of the ability of a logic gate output, implemented electronically, to drive a number of inputs of other logic gates of the same type. In most designs, logic gates are connected together to form more complex circuits, and it is common for one logic gate output to be connected to several logic gate inputs Frequency stress Case temperature (for passive components) Surge current stress ratio Reverse voltage stress ratio Power Stress Ratio Voltage Stress Ratio 5. To modify a type’s parameter values, double-click on its row in the list; the Derating Value Definition dialog box opens. © 2014 ALD Software Ltd.
