DAC39J84: Table 9 LMF = 841 missing column - Typo?

Travis Ayres

Part Number: DAC39J84

The datasheet for DAC39J94 looks like under LMF = 841, there is a missing/blank column -

all of the other settings have 32 bits per lane (4 octets). LMF = 841 has 24 bits listed, which doesn't make any sense to me.

Can someone confirm if this is a typo?

Thanks,

-Travis

over 6 years ago

0 Jim Brinkhurst1 over 6 years ago

TI__Mastermind 44680 points

Hi Travis
We have received your question. One of our DAC experts will provide a more detailed response soon.
Best regards,
Jim B

0 Jim Brinkhurst1 over 6 years ago in reply to Jim Brinkhurst1

TI__Mastermind 44680 points

Hi Travis
I reviewed the information in Table 9. The information is correct, but the format is a little confusing.
For LMF = 148 the Frame is 8 octets long and one frame is shown.
Similarly for LMF = 244, the Frame is 4 octets long and one frame is shown.
For LMF = 442 the Frame is 2 octets long and 2 frames are detailed.
For LMF = 841 the Frame is 1 octet long. In this case 3 frames are detailed.
I hope this is helpful.
Best regards,
Jim B

0 Travis Ayres over 6 years ago in reply to Jim Brinkhurst1

Prodigy 110 points

Thank you, that clarifies things. I'm building a transport layer mapper for this part it looks like the Xilinx JESD core maps over 4 frames of data (256 input bits) per core clock cycle. Thanks!

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DAC39J84: Table 9 LMF = 841 missing column - Typo?