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The PAA piezo ceramic audio design sample kit from Sonitron includes four different piezo audio amplifiers and is ideal for experimenting with the included speaker. The kit consists of a SPS-6555-03 speaker built into a small plastic case, with four PAA amplifiers; PAA-LT3469-01, PAA-MAX9788-01, PAA-LM4960SQ-02, PAA-StepUpBTL-01.

The PAA-LT3469-01 amplifier is a piezo microactuator driver with boost regulator. From a 5 V or 12 V supply, it can drive outputs up to 33 V, and capacitive loads of 5 nF to 300 nF. An internal regulator generates a boosted supply voltage, and slew rate is limited by the maximum output current. This amplifier features high switching frequency and an internal Schottky diode. The PAA-LT3469-01 amplifier has a typical unloaded gain of 30000 and compact external components.

The PAA-MAX9788-01 amplifier features low power consumption and a maximum output of 20 V pp. This piezo amplifier has an integrated charge pump power supply and offers fully differential outputs and inputs. This class G amplifier manages capacitive loads up to 1 μF.

Featuring a great sound output and compact design, the PAA-LT3469-01 piezo amplifier offers an integrated step up converter and bridge tied load. For a load of 600 nF, the amplifier reached 24 V pp.

The PAA-StepUpBTL-01 amplifier is designed for a loud audio sound. This piezo amplifier is constructed from a bridge tied load circuit and a step up converter circuit. With an input voltage range of 5 V to 25 V, the PAA-StepUpBTL-01 offers a fixed amplification ratio of ±90.