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Maximum voltage/current that can be drawn from signal gen?

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Maximum voltage/current that can be drawn from signal gen?

Postby furuian » Sat Jan 14, 2017 1:29 pm

Hello,

In our lab we have a 5444A and a 5444B. I use the signal generator to generate simple sine waves that we connect to piezoelectric ultrasound transducers. The transducer impedances are between 20 and 500 Ohm (depending on the frequency).

I would like to maximize the power provided to the transducers. What voltage/current/power limits do I have to be aware of in order to not damage the signal generator?

Thank you,
Ian
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Re: Maximum voltage/current that can be drawn from signal ge

Postby Arbitrageur » Sat Jan 14, 2017 11:22 pm

Hi,
I would like to know the official answer as well. On the data sheet tough I found that the output resistance of my 3306D's generator output is 600Ohm. Taking the maximum of 2V output, it means even if I short it to the ground the current is I=U/R 3.3mA.

In essence I do not think you can damage the unit with high amps, since even short circuit operates at very low amps. On the other hand it has overvoltage protection only below 20V, so you should avoid mistakenly putting voltage higher than that on the output.

Best regard,
Justin
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Re: Maximum voltage/current that can be drawn from signal ge

Postby Martyn » Tue Jan 17, 2017 8:21 am

That is correct for the 3000 series.

Similar for the 5000 series, except the output impedance is 50 Ω, so 40mA.

Both have overvoltage protect at ±20 V
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