TLV711: Pull Down Resistor Tolerance

David Mckinney

Part Number: TLV711

For the 150k ohm pull-down resistor on the TLV7111833DDSER ENx pin(s), can you provide the tolerance of the 150k ohm internal resistor?

over 5 years ago

0 JCHK over 5 years ago

TI__Guru 50190 points

Hi David,

I tried to see if I could glean this from the test data, but it is not clear. I will have to check with a designer, but if I were to guess it would probably be around 10% or maybe more.

Why is the customer concerned with this?

Regards

0 David Mckinney over 5 years ago in reply to JCHK

TI__Expert 6850 points

They are going to use the internal pull down as part of a EN control circuit.

0 JCHK over 5 years ago in reply to David Mckinney

TI__Guru 50190 points

Hi David,

I have been ensured the Design team will get an answer early next week.

0 David Mckinney over 5 years ago in reply to JCHK

TI__Expert 6850 points

HI JCHK;

Can you advise if there is an update on this from the design team?

I believe the answer is also in the datasheet on page 3. With Ven=0.9V, and the non-pull down version drawing 0.04uA, then the pull down version Enable pin current will be 6uA typical. This means the pull down resistor is: =0.9V/(0.000006-0.00000004)A or ~151k ohms. The process variation should be considered and could be as high as 20%.

Can you advise if this is the correct understanding?

0 JCHK over 5 years ago in reply to David Mckinney

TI__Guru 50190 points

Hi David,

The design team still has not gotten to this. I have been ensured it will be done by next week.

Sorry for the delay.

0 JCHK over 5 years ago in reply to JCHK

TI__Guru 50190 points

Hi David,

Here are the simulation results for nominal, strong, and weak process corners:

This is far less than shown in the datasheet which may be due to the test setup for this device.

I hope this answers your question.

0 David Mckinney over 5 years ago in reply to JCHK

TI__Expert 6850 points

JCHK;

Can you check the "5128" number in the table. It seems to be way larger than the Nominal and Weak values....

0 JCHK over 5 years ago in reply to David Mckinney

TI__Guru 50190 points

Hi David,

Yes, these are the simulation results. Keep in mind this is a worst-case process corner. Again these are far lower than what is listed as a maximum value in the datasheet.

Regards,

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TLV711: Pull Down Resistor Tolerance