• Difference between ADuM2401 v ADuM4401

    Q 

    I would like to know what the difference between the ADUM2401 and the ADUM4401
    isolators. Both devices are 5 kV RMS Quad-Channel Digital Isolators?

     

    A 

    Yes, both ADuM2401 and ADuM4401 are 5 kV RMS Quad-Channel Digital Isolators.
    The…

  • ADuM4401 IOH & IOL & output source /sink  question

    Dear sir

    Just question about ADuM4401 IOH & IOL  & Isource / Isink spec.

    Due to I didn’t found it on current EE spec please help me check it and feedback to me.

    BTW, the supply is 3.3V.

    thanks!!

  • ADUM4401 output signal abnormal during surge test

    Hi Sir,

      Our customer use ADUM4401 for the isolation UART data and signal between Primary side and Secondary side.

    We found out that the Input signal is low but the Output signal is high during the surge test (4KV, from AC inlet).

    We check the VCC1…

  • ADuM4401 isolator chip power down at VDD2 pin

    we use ADuM4401 Isolator chip with 3.3V power supply at VDD2 pin 16, when we short the input to ground pin 11& pin 9 ... the power supply at VDD2 pin 16 is pulling down to 2.8 v and gradually increasing back to 3.3 V. Why is this happening? anyone there…

  • ADUM4401输出信号浪涌测试中异常

    你好,

      
          我们有使用ADUM4401 作为一、二次侧信号隔离与数据传送隔离. 但做surge 测试时却发现有时isolator input low, output 却变成为high(如下图Ch4), 想请问：

      1. 可能的原因是什么？
      2. 要如何改善此问题？

    C1: VCC1, C3: Isolator pin4(INB), C4: Isolator pin1３(OUTB)




     
     
     
     
     
     
     
     
     
     
     
     

  • Can you provide any Radiated Emission test result for iCoupler?

    Hi,

    I would like to ask if any test result report for Radiated Emission is available for ADI iCoupler, especially for ADuM2401 and ADuM4401?

  • RE: Capacitor coupling in high common mode noise enviroment

    Hello Jester,

    We recommend referencing the input circuitry to the isolated Analog ground. See this post for more information:

    http://ez.analog.com/message/60282#60282

    You might also consider a 4-channel digital isolator for the SPI interface as an…

  • RE: ADuM2401 Vdd1 pull down the supply power during surge test.

    Hi Brent,

    From the additional information you provided it might be attributed to latchup. I was curious if you have used the ADuM4401 before. This part is mentioned in the app note AN-793 linked below.
    http://www.analog.com/media/en/technical-documentation…

  • RE: ADUM4402隔离时钟出现问题

    Hello Yangxp

    It looks like you are using this part at Vdd=3.3V.

    There are two issues with use of the ADuM4401 in this application. The first issue is that the digital input switching threshold for the ADuM440x is TTL, so the switch point is between 0…

  • TAGS LIST: Interface and Isolation

    LTM2894
    LTM2895
    LTM9100
    LTM2885
    LTM2881
    LTM2882
    LTM2883
    LTM2884
    LTM2893
    LTM2886
    LTM2887
    LTM2889
    LTM2892
    LTC1694-1
    LTC4300
    LTC4310
    LTC4302
    LTC4305
    LTC4304
    LTC4303
    LTC4306
    LTC4307
    LTC4307-1
    LTC430…