driving piezo speakers

Projects General Guidance
1

so, i have a piezo speaker from murata and don't have much experience driving this type of speaker:

0.9?F±30% & max sinusoidal voltage 5.0Vrms
200Hz to 20kHz, 92.0dB±3.0dB
http://www.murata.com/products/catalog/pdf/p83e.pdf

Can I just use a digital Arduino-Uno output and PWM signal to produce tones? In what situation would I want an audio amplifier? If so, any recommendations on what I should use as the amplifier?

I'm not sure what voltage a stereo amplifier outputs, but I'm assuming that they produce more current. From what I understand, a piezos expansion depends on the voltage, and the rate at which it can reach this voltage 'slew rate' has to do with the current provided by the amp, and the capacitance of the piezo (smaller faster). Is this true? If so, is the dB volume more a function of the voltage rather than power/wattage?

thanks for any tips

2

Hi, Yes that should work on an Arduino output. Use the TONE library function or write your own...

It has quite a high capacitance. You might need to put a 100 ohm resistor in series with it if Arduino has some problem.

It will be pretty loud, I think. You will put about 5V Peak-to-peak on it or a little less than 2 volts RMS. (Not exact.. you will be putting a square wave signal into it, not a sine wave. 2.5V RMS, come to think about it..) If you are math oriented: Root mean square - Wikipedia

Where did you get this? It looks interesting.