Piezo Transducers

Product Details

Piezo Transducers
Sting

3202

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Description:

These ceramic piezo transducer elements generate a range of audible tones and frequencies when energised by 3V peak square wave. They can be driven direct from CMOS ICs with low power consumption. They are supplied unhoused and with wires attached. Provided they are mounted rigidly in the prescribed manner, outputs of up to 90dB can be achieved. In addition to a wide range of applications where audible warnings or indications are preferred to visual, other uses include toys, clocks and watches, calculators and electronic games, using the transducer in place of a speaker. Because there are no moving parts to wear out, these elements are reliable for use in professional, commercial and industrial applications. They withstand severe environmental conditions and prove durable in domestic appliances without causing r.f. interference. A range of different sizes are available.

Specifications:

Piezo Transducer 27mm/1· 8kHz

Resonant frequency:

1· 8kHz ▒0· 5kHz

Impedance at resonance:

800

Capacitance:

25nF ▒30%

Maximum input voltage:

30V p-p

Operating temperature:

-20°C to +70°C

Piezo Transducer 27mm/4· 2kHz

Resonant frequency:

4· 2kHz ▒0· 5kHz

Impedance at resonance:

500

Capacitance:

14nF ▒30%

Maximum input voltage:

30V p-p

Operating temperature:

-20°C to +70°C

Piezo Transducer 35mm/2· 8kHz

Resonant frequency:

2· 8kHz ▒0· 5kHz

Impedance at resonance:

450

Capacitance:

20nF ▒30%

Maximum input voltage:

30V p-p

Operating temperature:

-20°C to +70°C

Piezo Transducer 41mm/2· 0kHz for speech

Resonant frequency:

2· 0kHz ▒0· 5kHz

Frequency range:

750Hz to 20kHz

Impedance at resonance:

600

Capacitance:

40nF ▒30%

Maximum input voltage:

15V p-p

Operating temperature:

-20°C to +70°C

Piezo Transducer 50mm/2· 8kHz

Resonant frequency:

2· 8kHz ▒0· 5kHz

Impedance at resonance:

500

Capacitance:

20nF ▒30%

Maximum input voltage:

30V p-p

Operating temperature:

-20°C to +70°C

Nodal ring diameter:

34mm

Note: These transducers are supplied unmounted and with wires attached. If it is required to remove/reattach wires this must be carried out extremely carefully. Soldering to the silvered electrode must be done with the minimum of heat for a fraction of a second, or destruction of the silvering begins to occur. The brass rim of the transducer acts as a heatsink and will require more heat, but the minimum of solder should be used. The transducers may be mounted to a surface using any suitable adhesive.