MC34119 Low Power Audio Amplifier – Datasheet

4,124 views


The MC34119 is a low-power audio amplifier integrated circuit intended (primarily) for telephone applications, such as in speakerphones. It provides differential speaker outputs to maximize output swing at low supply voltages (2.0 V minimum). Coupling capacitors to the speaker are not required. The open-loop gain is 80 dB, and the closed-loop gain is set with two external resistors. A Chip Disable pin permits powering down and/or muting the input signal.

MC34119 Pinout

MC34119 Pin Configuration

Pin NoPin NameDescription
1 CDChip Disable
2FC2A capacitor at this pin increases power supply rejection
3FC1Analog ground for the amplifiers
4VinNegative Supply Voltage
5VO1Amplifier input
6VCCDC supply voltage
7GNDGround pin for the entire circuit
8VO2Amplifier Output

MC34119 Key Features

  • Chip Disable Input to Power Down the IC
  • Low Power–Down Quiescent Current
  • 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 Compone

You can download this datasheet for MC34119 Low Power Audio Amplifier – Datasheet from the link given below: