(ADuM140)Supply current with OOK.

Hi !

I saw the datasheet about ADuM140.

http://www.analog.com/media/en/technical-documentation/data-sheets/ADuM140D_140E_141D_141E_142D_142E.pdf

For example , ADuM140D/E's supply current is this.

1)

I think this data is 50%-duty.

Is it correct?

2)

And about OOK, I think if I input Low only , oscillator will stop.

So, I will be able to decrease supply current.

Is my understanding is correct?

3)

And if No.2 question is correct, will ADuM14* 's supply current will proportional to DUTY?

And if you have a data about this, can you show me to us?

4)

And do you have a schedule to release smaller package.

For example ,SSOP or more smaller.

Best regards.

Kawa

  • Hi Brian!

    Thank you for your answer .

    These answer will help us very much!

    I have few question about datasheet.

    1)

    What is V15 ?

    => I couldn't understand what 5 is.

    2)

    What is 1(E0 ,D0), 1(E1,D1)6 ?

    => I think E0,Do,E1,D1 is the device model.

         1 and 0 is input signal.

         What is 6 ?

    3)

    And also you said "for at least the lower frequency like 1Mbps" ,

    what value is lower frequency ?

    Lower than 1Mbps?

    4)

    And I think the supply current will proportional to frequency?

    Best regards.

    Kawa

  • 0
    •  Analog Employees 
    on Oct 22, 2015 1:09 AM

    Kawa:

    1. The supply current data is 50% duty cycle (BTW, it also says this above Table 1).

    2. For the ADuM14xE1 or ADuM14xD1 versions, the oscillator is off when the input is low and the supply current goes down. The oscillator is off for the ADuM14xD0 or ADuM14xE0 when the input is high and the supply current goes down. 

    3. Yes, for at least the lower frequency like 1Mbps, the supply current will follow the duty cycle. Using typical 5V IDD1 datasheet Table 1 Quiescent supply current 1.2mA 0% duty, 2.0mA at 100% duty, and Table 2 supply current at 1Mbps of 6.8mA, the attached curve shows the straight line.

    4. We will soon release smaller package, the SOIC-N 16 pin narrow body package.

    Regards, Brian

  • Hi Brian!

    Thank you for your answer!

    Best regards.

    Kawa

  • 0
    •  Analog Employees 
    on Oct 23, 2015 11:15 PM

    Kawa: Answers to your questions:

    1. The 5 is a footnote below the table which states:

    VI is the voltage input.

    2. The 6 is a footnote below the table which states:
    ADuM140E0/ADuM141E0/ADuM142E0 models, D0 is the ADuM140D0/ADuM141D0/ADuM142D0 models, E1 is the ADuM140E1/ADuM141E1/ADuM142E1 models, and D1 is the ADuM140D1/ADuM141D1/ADuM142D1 models. See the Ordering Guide section.

    3. Lower frequency is 1Mbps or lower.

    4. The supply current will be proportional to frequency, like the curve you made.  Other figures of supply current vs data rate are shown in the datasheet.

    Regards, Brian

  • Hi Brian.

    I was reading the datasheet.

    1)

    I think the datasheet is wrong.

    Can you check about this?

    Best regards.

    Kawa