Description

The MC34119P is a low power audio amplifier integrated circuit designed for telephone applications, such as speakerphones. It provides differential speaker outputs to maximize output swing at low supply voltages. Coupling capacitors to the speaker are not needed. The MC34119P is available in standard 8-pin DIP, SOIC package, and TSSOP package.

Specifications and features

- Wide Operating Supply Voltage Range: 2.0 V to 16 V

- Low Quiescent Supply Current: 2.7 mA Typ for Battery Powered Applications

- Chip Disable Input to Power Down the IC

- Low Power–Down Quiescent Current: 65 µA Typ

- Drives a Wide Range of Speaker Loads: 8.0 Ω and Up

- Output Power Exceeds 250 mW with 32 Ω Speaker

- Low Total Harmonic Distortion: 0.5% Typ

- Gain Adjustable from <0 dB to >46 dB for Voice Band

- Requires Few External Components

Application Scenarios

The MC34119P is ideal for telephone applications, especially in speakerphones. It can be used in various audio amplification scenarios where low power and wide supply voltage range are required.

Comparison

- Provides differential speaker outputs to maximize output swing at low supply voltages

- No need for coupling capacitors to the speaker

- Wide operating supply voltage range

- Low quiescent supply current

- Can drive a wide range of speaker loads

- Low total harmonic distortion

- Adjustable gain for voice band

- Requires few external components

- Not suitable for high-power audio amplification