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ISO1500: ISO1500/ISO1410 EVM

Alen Barisic
Intellectual 1300 points
Part Number: ISO1500
Other Parts Discussed in Thread: ISO35T, , ISO1410, ISO35

We use the ISO35T with a coilcraft transformer.

Which advantages/disadvantages would it have to instead use the ISO1500 or ISO1410 with isolated control of the transformer?

Thank you!

  • 0
    TI__Guru 52190 points

    Hi Alen,

    Please do note that ISO35T is an isolated RS-485 transceiver with an integrated transformer driver while ISO1410 and ISO1500 are the isolated RS-485 transceivers which do not integrate any transformer driver. This means that you would require an external transformer driver like SN6505 to generate isolated power.

    Apart from the above difference, ISO1410 and ISO1500 devices are our latest isolated RS-485 transceivers with many advantages over ISO35T. Please find below some of advantages that the two devices have over ISO35T.

    1. Employs On-Off Keying (OOK) architecture.
    2. Supports wide logic side (1.71V to 5.5V) power supply voltage.
    3. Improved EMC performance.
    4. Much higher CMTI
    5. Higher operating temperature

    In addition to the above benefits, ISO14xx family of devices offer the below advantages as well.

    1. Supports wide bus side (3V to 5.5V) power supply voltage.
    2. Profibus compliant.
    3. Supports reinforced isolation.
    4. Much higher isolation specifications.
    5. Pin-compatible to ISO35 and most other isolated RS-485 transceivers but not for ISO35T.

    Between ISO14xx and ISO1500, the ISO14xx family of devices supports reinforced isolation while ISO1500 supports basic isolation & is available in a much smaller package which is suitable for cost sensitive application. Thanks.

    Regards,

    Koteshwar Rao