Piezoelectric Acoustic Generators Piezo Ceramic Elements - External Drive Type Features: How To Order: 1) Wide variety of tones possible by connection to external circuits. 2) Low power consumption, thin, lightweight 3) No-contact design makes element highly reliable and eliminates noise problems KBS - 20 DA - 7 A S - 1 Applications: 1) Clocks, electronic calculators, pocket alarms, cameras. 2) Equipment containing microprocessors (microcomputers, microwave ovens, TVs, stereos, automobiles, etc.) 3) Telecommunications equipment (facsimile machines, telephones) 4) Electronic medical equipment 1 2 3 4 5 6 7 1 2 3 4 5 Model Diameter (mm), eg. 20 Piezo Ceramic Element Resonant Frequency in kHz 2 Electrode Types A = Element only C = With lead wires 6 Metal Disc Material S = Stainless Steel Blank = Brass 7 Modifier code for lead wire spec. Dimensions: C type - 2 Electrodes with Lead Wires A type - 2 Electrodes Available Lead Wire Options W: Thickness AWG-32 (UL-1571) L: Length (mm) 50 ± 5, 75 ± 5, 100 ± 10, 125 ± 10, 150 ± 15 Note: See specifications for values of A, B, C, etc. S: Strip Part 3 ± 1, 5 ± 1 C: Color red, black, blue Temperature Characteristics (KBS-27DA-5A) • RESONANT FREQUENCY (f r) • TEMPERATURE CHARACTERISTICS (CAPACITANCE: Cd) 5 0 ∆Cd (%) ∆fr (%) 20 10 -5 0 -10 -10 -20 8 0 20 40 60 TEMPERATURE (°C) 80 -20 0 20 40 60 TEMPERATURE (°C) 80 Piezoelectric Acoustic Generators Piezo Ceramic Elements - External Drive Type Specifications (A type) Model No. Resonant Frequency (kHz) Resonant Impedance (Ω) KBS-13DA-12A 12.0 ± 1.2 700 KBS-15DA-9A-2 10.5 ± 3.0 600 KBS-20DA-7A 16.6 ± 1.0 300 KBS-20DA-7AS 17.5 ± 1.0 300 KBS-23DA-4A 4.0 ± 1.0 600 KBS-27DA-3A 13.0 ± 0.5 1,500 KBS-27DA-5A 14.6 ± 0.5 200 KBS-27DA-5AS 15.0 ± 0.5 200 KBS-30DA-1A 11.4 ± 0.5 500 KBS-35DA-3A 12.9 ± 0.5 200 KBS-38DA-2AL 11.5 ± 0.3 300 KBS-47DA-06A-3 0.70 ± 0.20 700 KBS-50DA-06A 0.65 ± 0.25 1,500 KBS-50DA-08A-3 0.87 ± 0.25 3,000 KBS-50DA-1A 0.90 ± 0.30 600 ★ Measured at 120Hz, all others at 1kHz Static Capacitance (pF) 15,000 ± 30% 18,000 ± 30% 10,000 ± 30% 10,000 ± 30% 12,000 ± 30% 10,000 ± 30% 20,000 ± 30% 20,000 ± 30% ★48,000 ± 30% 30,000 ± 30% ★36,000 ± 30% ★120,000 MIN. ★120,000 MIN. ★40,000 ± 30% ★45,000 ± 30% Dimensions (mm) Metal Disc (φA) 13.4 ± 0.1 15.0 ± 0.1 20.0 ± 0.1 20.0 ± 0.1 22.8 ± 0.1 27.0 ± 0.1 27.0 ± 0.1 27.0 ± 0.1 30.0 ± 0.1 35.0 ± 0.1 38.0 ± 0.1 46.94 ± 0.1 50.0 ± 0.1 50.0 ± 0.1 50.0 ± 0.1 Ceramic Disc (φB) 10.0 ± 0.3 12.0 ± 0.3 14.2 ± 0.3 14.2 ± 0.3 15.0 ± 0.3 14.2 ± 0.3 20.2 ± 0.3 20.2 ± 0.3 20.2 ± 0.3 25.0 ± 0.5 25.0 ± 0.5 25.0 ± 0.5 25.0 ± 0.5 25.0 ± 0.5 30.0 ± 0.5 Metal Disc Total Thickness Metal Disc Material (T) Thickness (t) 0.36 ± 0.1 0.15 ± 0.03 Brass 0.42 ± 0.1 0.20 ± 0.03 Brass 0.45 ± 0.1 0.20 ± 0.03 Brass 0.45 ± 0.1 0.20 ± 0.03 Stainless Steel 0.41 ± 0.1 0.15 ± 0.03 Brass 0.49 ± 0.1 0.25 ± 0.03 Brass 0.53 ± 0.1 0.25 ± 0.03 Brass 0.53 ± 0.1 0.25 ± 0.03 Stainless Steel 0.23 ± 0.1 0.10 ± 0.03 Brass 0.53 ± 0.1 0.25 ± 0.03 Brass 0.38 ± 0.1 0.15 ± 0.03 42-Alloy 0.28 ± 0.1 0.15 ± 0.03 Brass 0.28 ± 0.1 0.15 ± 0.03 Brass 0.44 ± 0.1 0.20 ± 0.03 Brass 0.44 ± 0.1 0.20 ± 0.03 Brass Electrode (φC) (19.0) (11.0) (13.0) (13.0) (14.0) (13.0) (19.0) (19.0) (19.0) (23.5) (23.5) (23.5) (23.5) (23.5) (28.5) Application Circuits For External-Drive Oscillation Buzzer 3kΩ 0.022µF 2MΩ I1 CMOS LSI 1MΩ 25mH Alarm 3kΩ 0.022µF 2MΩ I . I .... I n1 n2 n Crystal I3 Driving Circuit 2200pF 3kΩ 0.022µF 2MΩ Alarm I2 Indicator (LCD) Hex Inverter Watch Circuit Quad NAND gate Ringing Circuit (for telephone) 1MΩ 0.001µF 55mH 120kΩ Alarm input I.C. Oscillation Circuit (without feedback) 1kΩ NOTE: Wherever possible, the piezo devices should be capacitive coupled to avoid permanent DC bias and possible long term damage. 9