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| NTE745 Integrated Circuit Audio Amplifier, 500mW Description: the NTE745 is a monolithic complementary power amplifier and preamplifier designed to deliver 1/2-Watt into a loudspeaker with a 3.0mV(rms) typical input. Gain and bandwidth are externally adjustable. Typical applications include portable AM-FM radios, tape recorders, phonographs, and intercoms. Features: D 1/2-Watt Power Output (9.0 Vdc Supply, 8-Ohm Load) D High Overall Gain-3.0mV(rms) Sensitivity for 1/2-Watt Output D Low Zero-Signal Current Drain-4.0mAdc @ 9.0V typ D Low Distortion-0.5% at 250mW typ Electrical Characteristics: (V+ = 9V, RL = 8, f = 1kHz, TA = +25C unless otherwise specified) Parameter Open Loop Voltage Gain Sensitivity Output Impedance (Power-Amplifier) Signal to Noise Ratio Total Harmonic Distortion Quiescent Output Voltage Output Power Current Drain Power Dissipation Symbol AVOL S ZO S/N THD VO PO ID PD THD 10% Zero Signal Zero Signal PO = 150mW, f = 300Hz to 10kHz PO = 250mW Test Conditions Pre-Amplifier, RL = 1.0k Power-Amplifier, RL = 16 PO = 500mW Min - - - - - - - 500 - - Typ 270 360 3.0 0.5 55 0.5 V+/2 570 4.0 36 Max - - - - - - - - - - Unit V/V V/V mV(rms) W dB % Vdc mW mA mW Pin Connection Diagram GND 1 N.C. 2 Power Amp Output 3 VCC 4 8 Power Amp Input 7 GND 6 Pre-Amp Input 5 Pre-Amp Input 8 5 .260 (6.6) 1 4 .390 (9.9) Max .155 (3.93) .300 (7.62) .100 (2.54) .300 (7.62) .145 (3.68) |
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