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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 No | Pin Name | Description |
|---|---|---|
| 1 | CD | Chip Disable |
| 2 | FC2 | A capacitor at this pin increases power supply rejection |
| 3 | FC1 | Analog ground for the amplifiers |
| 4 | Vin | Negative Supply Voltage |
| 5 | VO1 | Amplifier input |
| 6 | VCC | DC supply voltage |
| 7 | GND | Ground pin for the entire circuit |
| 8 | VO2 | Amplifier 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:
