DS90UB960-Q1: ESD Protection

Diego Lewis

Part Number: DS90UB960-Q1
Other Parts Discussed in Thread: TPD4E02B04-Q1, TPD1E05U06-Q1

Hi Team,

My customer is trying to understand if ESD protection should be added to their design, while I found some comments on other posts suggesting it should be, it was never clear where and which devices.

My understanding is that it should be added, so I would recommend the TPD1E05U06-Q1 or the TPD4E02B04-Q1 between the AC coupling caps and the 960, however would it also be needed for the power section of the PoC? Would the ferrite beads and caps be enough to protect the power rail?

Regards, Diego

over 5 years ago

0 Steven(Shenzhen) Shi over 5 years ago

TI__Mastermind 30515 points

Hi Diego,
ESD device is helpful to discharge the energy to ground in the high speed trace, generally it is recommended to put the ESD device close to the connector.

Steven

0 Diego Lewis over 5 years ago in reply to Steven(Shenzhen) Shi

TI__Intellectual 1540 points

My understanding is that it should placed between the AC coupling caps and the 960 due to the voltage limitations of most ESD devices, please confirm the acceptable amount of input capacitance on the ESd device. Would it also be needed for the power section of the PoC, or would the ferrite beads and caps be enough to protect the power rail?

0 Steven(Shenzhen) Shi over 5 years ago in reply to Diego Lewis

TI__Mastermind 30515 points

Hello,
1. typically 0.25pf is recommended for 4Gbps link
2. generally the higher clamp voltage, the better ESD protection from ESD device viewpoint. for the real system, if the FPD-Link voltage is 1.8V for example, the ESD device can select 12V clamp voltage as well which can tolerate the PoC voltage as well. the ESD device is assistant to discharge higher voltage in the ESD zap test.

regards,
Steven

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DS90UB960-Q1: ESD Protection