Hanno,
I have given the link to our reference design. There are a multitude of piezo elements and many other factors to consider when making a smoke detector. I am happy to help you with any specific questions about our piezo drivers, but there is no simple answer to your above question. We have some piezo vendors listed here: www.ti.com/.../haptic-driver-actuators.page
I have given the link to our reference design. There are a multitude of piezo elements and many other factors to consider when making a smoke detector. I am happy to help you with any specific questions about our piezo drivers, but there is no simple answer to your above question. We have some piezo vendors listed here: www.ti.com/.../haptic-driver-actuators.page