• State TI Thinks Resolved
  • Locked Locked
  • Replies 12 replies
  • Answers 2 answers
  • Subscribers 34 subscribers
  • Views 2710 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

SN65HVDA100-Q1: About VOH(VOL) vs Io graph

Tsukui Yusuke
Guru 21930 points
Part Number: SN65HVDA100-Q1

Hi,

Customer wants the following two graph data.
(Customer want to use it for matching confirmation of LIN communication.)

1. VOH (VOL) vs Io graph ※Io=0mA to 10mA
2. VOH (VOL) vs Vsup graph ※Vsup=5V to 16V
    (Datasheet fig7,8 does not have description in the range of 5V to 7V)

Do you have the above characteristic graph?

Best Regards,
Yusuke / Japan Disty

  • 0
    TI__Expert 6955 points

    Yusuke,

    Unfortunately we don't have that data available at the moment. It will take approximately 1 week to prepare and conduct the test fro the requested graphs.

    -Lucas

  • 0 in reply to Lucas Schulte9
    Guru 21930 points

    Lucas-san,

    Thank you for your response and support.
    Could you get the requested graph?
    I know it's a big ask, and I appreciate you doing it for me.

    My e-mail address is
    tsukui-y@macnica.co.jp

    Best Regards,
    Yusuke / Japan Disty

  • 0 in reply to Tsukui Yusuke
    TI__Expert 6955 points
    Yusuke-san,

    The SN65HVDA100-Q1 samples have arrived and tests will be conducted this week.

    -Lucas
  • 0 in reply to Lucas Schulte9
    Guru 21930 points

    Lucas-san,

    Thank you so much for your sincere correspondence to my requests.
    I have one additional request.
    Could you get additional VOL graph data with the following conditions?

    TXD=low, IO=10mA

    Customers want to know VOL characteristics in Vsup = 7.1V condition.

    Best Regards,
    Yusuke / Japan Disty

  • 0 in reply to Tsukui Yusuke
    TI__Expert 6955 points

    Yusuke-san,

    Below are the graphs for VOH/VOL vs Vsup. Note that the device does not function when Vsup = 5V. I need clarification on the testing for Io.  Io on the LIN pin cannot exceed 2mA at maximum. Is that the pin you are referring to for the Io tests?

    -Lucas

  • 0 in reply to Lucas Schulte9
    Guru 21930 points

    Lucas-san,

    Thank you for your kind support.
    " need clarification on the testing for Io.  Io on the LIN pin cannot exceed 2mA at maximum."
    I confirmed the following description in the data sheet and asked.
    What is the value of 40 mA condition?



    Background of the question,
    Customer wants to know the Vol value when conditions are specified.
    They want to know if 0.1 x Vsup can be achieved if conditions are relaxed.
    (ex, Io＝10mA、Vsup＝7.1V ⇒ 0.1V×Vsup)

    Could you give me your advice?

    Best Regards,
    Yusuke/Japan Disty



  • 0 in reply to Tsukui Yusuke
    TI__Guru 60262 points

    Yusuke-san,

    The dominant level is generated by driving the gate of a low-side MOSFET to be close to GND, while the recessive level is pulled up through a resistor to battery. During the dominant state, the LIN bus is pulled down through a much lower resistance (RSDon of the low-side MOSFET) than during the recessive state. Because the pull-up to recessive state is "weaker", applying a load to the LIN pin greater than 2mA is going to significantly affect your VOH levels.

    In theory, this could work, if you place a very small load on the LIN bus, but keep in mind that the 0.2*VSUP is the maximum value that VOL can be within spec. In most cases it is 0.1*VSUP or lower. Has the customer seen otherwise?

    Regards,

  • 0 in reply to Eric Hackett
    Guru 21930 points

    Eric-san, Lucas-san,

    Thank you for you kind support.
    Could you tell me the test conditions of  VOH/VOL vs Vsup (5V to 16V) data.
    (Measurement temp condition etc...)

    And I am sorry I didn't explain it clearly enough.
    ・Customer want Vol and Voh worst case data.
    ・About Vol
    -When Io=10mA and Vsup is 7.1V,
     Customers want to make sure whether it is possible achieve the 0.1×Vsup.

    Do you have any useful data for the above?
    I would like a reference graph on this matter.
    I am sorry for taking your time.

    Best Regards,
    Yusuke/Japan Disty

  • 0 in reply to Tsukui Yusuke
    TI__Expert 6955 points
    Yusuke-san,

    I understand the request now. I will be able to gather this data tomorrow.

    -Lucas
  • 0 in reply to Lucas Schulte9
    Guru 21930 points
    Lucas-san,

    Thank you for dealing with this matter.

    By the way,
    Could you tell me about the test condition of you sent me graph?

    Best Regards,
    Yusuke/Japan Disty
  • 0 in reply to Tsukui Yusuke
    TI__Expert 6955 points
    Yusuke-san,

    I apologize. I was unable to test the SN65HVDA100-Q1 today as promised. Time will be set aside tomorrow to finish the testing. I will also provide details of the test condition.

    -Lucas
  • 0 in reply to Tsukui Yusuke
    TI__Expert 6955 points

    Yusuke-san,

    Vsup = 7.1V

           Io (mA)

     Vol (mV)

    2.5

    740

    10

    908

    19

    1076

    Unfortunately the SN65HVDA100-Q1 does not achieve 0.1*Vsup when Io = 10mA and Vsup = 7.1V. Conditions for all tests so far have been at a temperature of 25C. 

    -Lucas