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NTE745

Integrated Circuit Audio Amplifier, 500mW

NTE Electronics 

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, RL = 8Ω, f = 1kHz, TA = +25°C unless otherwise specified)

Parameter

Symbol

Test Conditions

Min Typ Max Unit

Open Loop Voltage Gain

AVOL

Pre–Amplifier, RL = 1.0kΩ

Power–Amplifier, RL = 16Ω

– 270 –

V/V

– 360 –

V/V

Sensitivity

S PO = 500mW

– 3.0 – mV(rms)

Output Impedance (Power–Amplifier)

ZO

– 0.5 –

W

Signal to Noise Ratio

S/N PO = 150mW, f = 300Hz to 10kHz

– 55 –

dB

Total Harmonic Distortion

THD PO = 250mW

– 0.5 –

%

Quiescent Output Voltage

VO

– V+/2 –

Vdc

Output Power

PO THD ≤ 10%

500 570 –

mW

Current Drain

ID Zero Signal

– 4.0 –

mA

Power Dissipation

PD Zero Signal

– 36 –

mW

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