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LOW-VOLTAGE AUDIO POWER AMPLIFIER

Providing a low-cost, compact alternative to discrete transistor amplifiers, the ULN3718M integrated circuit is ideal for application as a headphone driver in portable radios, tape players, and other battery-operated equipment. The low-power audio amplifier’s wide frequency response and low noise ensure premium performance.

The amplifier will operate (at reduced volume) with supply voltages as low as 1.8 V without a significant increase in distortion. This feature allows operation with a 3 V battery supply and minimizes concern about weak batteries. The class-AB audio amplifier has low quiescent current drain for maximum battery life. This device is rated for operation with supply voltages up to 9 V.

The ULN3718M audio amplifier is supplied in an 8-pin mini-DIP plastic package. A copper alloy lead frame gives the amplifier enhanced power dissipation ratings.

FEATURES

■ Wide Operating Voltage Range 1.8 - 9.0 V

■ Low Quiescent Current

■ AC Short-Circuit Protection

■ Low External Parts Count

■ Low Distortion

■ 40 dB Voltage Gain

■ Low Noise