DS15EA101: ds15ea101 Input termination resistor position

yana

Prodigy 240 points

Part Number: DS15EA101

I have a question about input termination resistor..

Which position is better in front of capacitor or In front of IC?

See below diagram.

For your reference, DS15EA101 datasheet describes the diagram that the position is in front of capacitor.

over 5 years ago

0 Nasser Mohammadi over 5 years ago

TI__Guru* 93670 points

Greetings Yanagawa-San,

I believe the second configuration - resistor after the Capacitor - is better since it does not provide a DC path and has less signal DC or low frequency attenuation.

Regards,, nasser

0 yana over 5 years ago in reply to Nasser Mohammadi

Prodigy 240 points

Hi Nasser

Thank you for answering my questions.

I think your answer is rational. However, the datasheet of 'DS15EA101' describes that the position is in front of capacitor. It is in Figure 3 on page 6.

Do you know the reason?

Regards,

0 Nasser Mohammadi over 5 years ago in reply to yana

TI__Guru* 93670 points

Greetings,

I am not sure about the reason for this earlier recommendation. This may work in some applications but 2nd approach is preferred.

Regards,, Nasser

0 yana over 5 years ago in reply to Nasser Mohammadi

Prodigy 240 points

Hello

Thank you for answering my questions.

Why preferred circuit is not described in the datasheet?
Can you confirm it with the person in charge of this document?

Thanks,

0 Nasser Mohammadi over 5 years ago in reply to yana

TI__Guru* 93670 points

Greetings,

I am the person responsible for data sheet change. We will make this change on next revision of the DS15EA101 data sheet.

Regards,, Nasser

0 yana over 5 years ago in reply to Nasser Mohammadi

Prodigy 240 points

Hello

Thank you for answering my questions.

I understood it.

Thanks,

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DS15EA101: ds15ea101 Input termination resistor position