TI LMH 5401 ADS model Or Faerman Gregory

TI LMH 5401 ADS model Or Faerman, Gregory Geyfman

Summary • Significant miscorrelation between LMH 5401 Eye Height/Eye Width measurement results vs. TI LMH 5401 ADS model simulation results for Signal Bit Rate 11. 67 Gbps: – Simulation EH degradation is x 14. 2 vs. measured degradation x 1. 8 – Simulation EW degradation is 2. 6 ps vs. measured degradation 24. 2 ps • Case Target: – To find miscorrelation root cause – To improve simulation results accuracy © 2018 Western Digital Corporation or its affiliates. All rights reserved. Confidential. 6/6/2021 2

Schematic Measurement: Setup is According to Stability Mode Application Notes J-BERT LMH 5401 Digital Scop © 2018 Western Digital Corporation or its affiliates. All rights reserved. Confidential. Simulation: Setup is according to the Stability Mode Application notes Behavior TX LMH 5401 Eye Scop © 2018 Western Digital Corporation or its affiliates. All rights reserved. Confidential. 6/6/2021 3

Behavior TX model to Test Load. No Jitter Measurements Simulations LMH 5401 INPUT OUTPUT Simulations Measurements EH(m. V) EW(ps) Input 612 85 613 79. 1 Output 43 82. 4 330 53. 9 2. 6 x 1. 8 24. 2 Delta x 14. 2 © 2018 Western Digital Corporation or its affiliates. All rights reserved. Confidential. 6/6/2021 4

© 2018 Western Digital Corporation or its affiliates. All rights reserved. 6/6/2021 5