IBIS Case Studies: Comparison of Simulations

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IBIS Case StudiesComparison of Simulations

• Fabrizio Zanella, EMC Corporation

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Objectives

• Compare SI Tools using IBIS models
• Compare to empirical measurements and SPICE
  simulations
• All measurements and simulations performed on SI
  test boards created at EMC

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IBIS Model Case Studies

• Case 1 TTL signals empirical,SPICE, IBIS
• Case 2 SRAM signals empirical,SPICE, IBIS
• Case 3 IBIS model comparison

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Case 1 Lab measurement
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Case 1 SPICE
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Case 1 Simulators A,B (IBIS models)
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Case 2 Lab Measurement
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Case 2 Simulators A, B (IBIS models)
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Case 2 SPICE
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Case 3 Comparison of IBIS models

• Data Sheet model vs Spi2IBIS model

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Summary

• SI Simulators, using IBIS models, are
  complementary and accurate
• IBIS models need to be checked beware of data
  sheet models