• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 13 subscribers
  • Views 500 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

Device recommendation

Yue TANG
Expert 8705 points
Other Parts Discussed in Thread: ISO7720, ISO1212, ISO1211, ISO7710

Hi,

Is there a matchable TI device to HCPL-0631 and TLP2366? please kindly give your recommendation. thanks. 

https://pdf1.alldatasheet.com/datasheet-pdf/view/526480/AVAGO/HCPL-0631.html

https://pdf1.alldatasheet.com/datasheet-pdf/view/808431/TOSHIBA/TLP2366.html  

  • 0
    TI__Guru 55815 points

    Hi Yue,

    Thanks for checking with us for the TI equivalent devices for HCPL-0631 and TLP2366. TI isolation devices are based on capacitive isolation technology and hence do not require any LEDs or photo detectors. Thus most TI isolators support either TTL or CMOS inputs which standard for most digital devices like MCUs, MPUs, data converters, transceivers, etc.

    ISO77xx family is TI's latest isolator family that supports optimum performance for most application. Device ISO7720 (dual channel) would be the best device to use against HCPL-0631 & TLP2366. ISO77xx device family includes devices with upto 6-channels, customer can save space and cost by using higher channel ISO77xx devices against multiples of HCPL & TLP devices.

    ISO77xx family supports many advantages over HCPL & TLP device, I am listing below some of the key advantages.

    1. Much higher isolation ratings (including VISO & VIOWM)
    2. Much higher datarate (upto 100Mbps)
    3. Much higher CMTI (100kV/µs)
    4. Standard digital I/O logic levels and power supply requirements
    5. Various channel configurations (upto 6-channels in one package) and multiple package options (5 packages) to choose from
    6. Wider operating temperature range (-55C to 125C)
    7. Much faster timing performance (including propagation delay & rise/fall times)
    8. Robust EMC performance
    9. All the device configurations are also qualified for automotive applications

    Regards,
    Koteshwar Rao

  • 0 in reply to Koteshwar Rao
    TI__Expert 8705 points

    Rao,

    Thanks for the reply. According to my understanding, the high speed opto coupler only need one power rail ， but TI isolation devices need two. Also, customer think opto couplers have better current output capability。 What's your point of view on these? 

  • 0 in reply to Yue TANG
    TI__Guru 55815 points

    Hi Yue,

    I agree with your inputs that optocoupler will only need one power rail for and has higher current output capability.

    Please do note that, even though the input side of optocoupler doesn't need a power rail explicitly, it still needs input current which has to be sourced from a power rail or from a device that is powered by a power rail. Since the power rail on input side is anyway required for the device (like MCU) that is interfaced to the optocoupler, it doesn't really become an advantage by not having an explicit power rail on the input side of an optocoupler.
    For PLC applications with digital field input, single power rail operation is very beneficial. For such applications, we have ISO1211 and ISO1212 which also require only one power rail and offer many advantages over optocoupler.

    For signal isolation where an optocoupler is used (e.g., between MCU & transceiver), the higher output current capability is not going to be any beneficial as most TTL/CMOS digital inputs only consume a few µA of input current. Thus digital isolators like ISO7710 ideal for signal isolation and do not require any external components.

    Let me know if you have any questions, thank you.

    Regards,
    Koteshwar Rao