NTE745 Datasheet, PDF (1/2 Pages) NTE Electronics – Integrated Circuit Audio Amplifier, 500mW

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 adjust-
able. Typical applications include portable AM–FM radios, tape recorders, phonographs, and inter-
coms.
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, R_L = 8Ω, f = 1kHz, T_A = +25°C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Open Loop Voltage Gain
A_VOL
Pre–Amplifier, R_L = 1.0kΩ
Power–Amplifier, R_L = 16Ω
– 270 –
V/V
– 360 –
V/V
Sensitivity
S P_O = 500mW
– 3.0 – mV_(rms)
Output Impedance (Power–Amplifier)
Z_O
– 0.5 –
W
Signal to Noise Ratio
S/N P_O = 150mW, f = 300Hz to 10kHz
– 55 –
dB
Total Harmonic Distortion
THD P_O = 250mW
– 0.5 –
%
Quiescent Output Voltage
V_O
– V+/2 –
Vdc
Output Power
P_O THD ≤ 10%
500 570 –
mW
Current Drain
I_D Zero Signal
– 4.0 –
mA
Power Dissipation
P_D Zero Signal
– 36 –
mW