Best method to add DC bias to output of a digital isolator

Scott

Other Parts Discussed in Thread: ISO721M, OPA2300

Hello,

I am using ISO721M isolators to isolate 3 signals. I wish to add about 0.7 volts DC to the output of the isolators. The couple of circuits I have tried have caused to much jitter/distortion to the waveforms.

The signals I am using vary in frequency from about 40KHz up to about 25MHz.

Any suggestions on how best to add some DC bias without effecting the signals?

Best Regards,

Scott

over 12 years ago

0 Elias Villegas M. over 12 years ago

TI__Guru* 76130 points

Hello Scott,

The TI's part number OPA2300 is a high-speed operational amp that you can use for a simple dc offset adjustment circuit.

You can find the datasheet on the following link.

http://www.ti.com/lit/ds/symlink/opa2300.pdf

Regards.

0 Scott over 12 years ago in reply to Elias Villegas M.

Prodigy 190 points

Thnaks for that Elias.

I was also thinking why do I not just use +0.7Vdc for gnd? If I use +0.7Vdc for the output gnd side that should do the trick?

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Best method to add DC bias to output of a digital isolator