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Differential driver for an Opto-isolator

tee_user
Prodigy 180 points
Other Parts Discussed in Thread: AM26LV31E

hello,

i want to control an drive amplifier.

i ve made an pcb with an 26LS31 but the ic doesnt work because the amplifier input is opto isolated. sadly i noticed this too late.

i attached the drive ampifier input circuit.

My Question:

Have ti an ic with the same pinout but differential ttl signal?

Which ic is the right one?

thx a lot

  • 0
    TI__Guru**** 167636 points
    Tee,

    If you positively need a pin to pin compatible device then try AM26LV31E
    It is designed for 3.3V operation therefore running at 5V should increase the output voltage by about 1.7V
    I have no data for running at the elevated voltage other than the absolute maximum voltage is 6V in the data sheet.

    What are you doing with the other three channels?
  • 0
    TI__Mastermind 43795 points

    Tee,

    The 26LS31 has differential TTL outputs.  You should look at the output waveform and verify it is working as you intended.  There may be nothing wrong with the schematic.

    Regards,

    Lee