NTE740A Integrated Circuit Audio Power Amp, 2W Description: TheNTE740A is an Audio Power Amplifier in a 14–Lead DIP type package designed for minimal external component requirements. Features: D Low Distortion D Low Quiescent Current D 34dB Internally Fixed Gain D High Input Impedance D Thermal Overload Protection D Output Short Circuit Current Limiting Absolute Maximum Ratings: Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26V Peak Output Current, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2A Operating Ambient Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –25° to +70°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C Electrical Characteristics: (TA = +25°C, VCC = 18V, f = 1kHz, RL = 8Ω unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit 9 10 26 V Supply Voltage Range VCC Quiescent Supply Current ICC No Signal Applied – 15 – mA Quiescent Output Voltage VOQ No Signal Applied, Note 1 9 – – V Output Voltage Swing VO Pout = 2W – 12 – VP–P Voltage Gain AV Pout = 0 31 34 37 dB Pout = 2W, Note 2 – 1.0 2.0 % Pout = 50mW, Note 3 – 0.5 1.0 % THD = 2%, RL = 8Ω, Note 4 2.0 2.5 – W THD = 2%, RL = 16Ω, Note 4 2.0 2.5 – W Each Input 140 170 – kΩ Pout = 0, f = 120Hz, Note 5 – 40 – dB f = 20Hz to 20kHz – 60 – µVrms Total Harmonic Distortion Audio Output Power Input Impedance Power Supply Rejection Ratio THD Pout Zin PSRR Equivalent Input Noise Voltage Sensitivity Input Voltage ein eout = 4.0Vrms, Pout = 2W – 80 – mV Bandwidth (–3dB) BW Pout = 1W, Note 6 – 100 – kHz Note Note Note Note Note 1. 2. 3. 4. 5. The quiescent output voltage typically equals 1/2 the normal VCC voltage = 1 Volt. When driving a 16Ω load, the nominal VCC is 24V. When driving a 16Ω load, the maximum low level distortion is reduced to 0.50%. Tested at VCC equals nominal and measured in watts (rms). Measurement made with a 5µF capacitor from Pin1 to GND. Voltage at Pin14 is at a ripple frequency of 60Hz. Note 6. Unity gain occurs between 10 and 100MHz. Pin Connection Diagram Bypass 1 14 VCC (+) Input 2 GND 3 13 N.C. 12 GND GND 4 11 GND GND 5 10 GND (–) Input 6 9 N.C. GND 7 14 8 Output 8 .280 (7.1) Max 1 7 .770 (19.5) Max .300 (7.62) .160 (4.0) Max .100 (2.45) .600 (15.24)