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ISOM8110: What is the maximum signal transfer rate of ISOM8110?

Kazuya Nakai59
Guru 21645 points
Part Number: ISOM8110
Other Parts Discussed in Thread: ISOM8710

Hello guys,

One of my customers is interested in ISOM8110.

The customer uses 50Mbps photo coupler for their current product.
But the photo coupler price is about 0.5$.
If ISOM8110 can drive 50Mbps signal, they may use this device.

What is the maximum signal transfer rate of ISOM8110?

your reply would be much appreciated.

Best regards,
Kazuya.

  • 0
    TI__Mastermind 29535 points

    Hello Kazuya-san, 

    Thank you for reaching out. Since this is a Transistor behavior opto-emulator, there will be no data rate spec. However, the general rule of thumb would be just bandwidth (680 kHz) times 2. So, Data rate would be around 1.2 Mbps.

    However, if ISOM8710 is an option, it can support up to 25Mbps. 

    Best,
    Andrew

  • 0 in reply to Andrew J
    Guru 21645 points

    Hello Andrew,

    Thank you very much for your reply.

    Could I ask you a few additional questions?

    Q1.
    Why is ISOM8110 data rate slower compared with ISOM8710?
    Is it on purpose to meet delay time of general opto-coupler?

    Q2.
    What are main advantage points of ISOM8110 compare with general opto-coupler?
    I know ISOM8110 has high reliability. What else? We need the information to use this device because this device price is higher than general opto-coupler one.

    Thank you again and best regards,
    Kazuya.

  • 0 in reply to Kazuya Nakai59
    TI__Mastermind 29535 points

    Hello Kazuya-san, 

    Happy to answer any questions you may have.

    1. ISOM8710 is designed for a logic output, and the addition of the VCC pins allows for a faster logic buffer to be used. ISOM8110 is intended to be used for transistor output (analog) applications which tend to be slower.
    2. Other than high-reliability, opto-emulators will have a tighter CTR performance over lifetime and won't suffer from the LED-ageing effect. You can read more about these benefits in our collateral.
      1. (+) [FAQ] [H] Opto-Emulators
      2. Introduction to Opto-Emulators

    Best,
    Andrew