OPA569: Generating triangular DC waveform with superimposed 66mV AC sinusoidal noise

dhanasuthan Kaneshapillai

Part Number: OPA569

Hi,

This is probably a simple problem. I am trying to generate a DC with superimposed AC noise to do some noise tolerance test.

I think,

One way the OPA569 can be used as a summing amplifier and feed both AC noise and DC input to generate the output.

Instead of using it in summing amp configuration,

Is that possible to use function generator (i.e. 33250A or 33100A) with OPA569 as a buffer with the gain of 2 or 3 to generate the following output or any possible options?

over 2 years ago

0 dhanasuthan Kaneshapillai over 2 years ago

Prodigy 60 points

I made typo on the model number. The function generator HP 33120A, not 33100A.

+1 Raymond Zhang1 over 2 years ago in reply to dhanasuthan Kaneshapillai

TI__Guru 55471 points

Hi Kaneshapillai,

You mean that you want sum two input as shown below.

OPA569 summing driver 11032022.TSC

Here is another example with a single supply voltage.

Please let us know if this will meet your requirements. Also, you may try to place two generator in series and generate a similar waveform, but the load current may be limited.

Best,

Raymond

0 dhanasuthan Kaneshapillai over 2 years ago in reply to Raymond Zhang1

Prodigy 60 points

Thanks Raymond. I will test it .

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OPA569: Generating triangular DC waveform with superimposed 66mV AC sinusoidal noise