LMH0302: propagation delay or latency

Yuta Nishie

Part Number: LMH0302
Other Parts Discussed in Thread: LMH0324

Tool/software:

Hi,

Could you please tell me the propagation delay or latency from when a signal is input to SDI and /SDI to when it is output from SDO and /SDO?

Best Regards,

Nishie

over 1 year ago

0 Shane Hauser over 1 year ago

TI__Mastermind 34605 points

Hi Yuta,

I'll need to see whether we have this data. Do you have a requirement for propagation delay in your application?

Best,

Shane

0 Yuta Nishie over 1 year ago in reply to Shane Hauser

Genius 5750 points

Hi Shane-san,

Thank you for your support.

In a customer's application, image processing is done using FPGA. Since we need to be careful about latency in image processing, we would like to know how much latency there is by processing signals through LMH0302. If we don't know the exact numerical value, we would like to know the value, such as in the order of milliseconds or nanoseconds.

Best Regards,

Nishie

+1 Shane Hauser over 1 year ago in reply to Yuta Nishie

TI__Mastermind 34605 points

Hi Yuta,

While we don't have concrete data on this, I estimate the latency for this part would be around a nanosecond at 3G. This is because the latency of our cable drivers/equalizers falls around 2-3 Unit intervals, where 1 UI is equal to one bit length at the operating data rate. At 3G this is around 333 picoseconds per UI

You can see this described in a similar E2E regarding the LMH0324. The LMH0324 is one of our cable equalizers that should have similar latency.

Best,

Shane

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LMH0302: propagation delay or latency