Overview
The MC34119D, produced by NXP USA Inc., is a low power audio amplifier integrated circuit. Although it is currently obsolete and no longer manufactured, it was primarily designed for telephone applications, such as in speakerphones. This IC is capable of low voltage operation, with a minimum supply voltage of 2.0V, making it suitable for line-powered devices. The MC34119D features a differential output to maximize the available voltage swing at low voltages, enhancing its performance in low-power scenarios.
Key Specifications
| Characteristics | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage | VCC | +2.0 | +16 | V | |
| Load Impedance | RL | 8.0 | Ω | ||
| Peak Load Current | IL | ±200 | mA | ||
| Differential Gain (5.0 kHz Bandwidth) | AVD | 0 | 46 | dB | |
| Ambient Temperature | TA | -20 | +70 | ℃ | |
| AC Input Resistance (@ VIn) | r_i | >30 | MΩ | ||
| Open Loop Gain (Amplifier #1, f≤100Hz) | AVOL1 | 80 | dB | ||
| Closed Loop Gain (Amplifier #2, VCC=6.0V, f=1.0kHz, RL=32Ω) | AV2 | -0.35 |
Key Features
- Differential Output: Provides a differential output (V01-V02) to maximize the available voltage swing at low voltages.
- Low Voltage Operation: Capable of operating with a minimum supply voltage of 2.0V.
- Power Down Mode: The CD pin allows the IC to be powered down for muting purposes and to conserve power.
- Power Supply Rejection: Pins FC1 and FC2 allow for controlling power supply rejection and noise, with capacitors at these pins affecting turn-on time and noise rejection.
- Unity Gain Stability: Amplifier #1 is unity gain stable with a unity gain frequency of approximately 1.5MHz.
Applications
The MC34119D is primarily intended for telephone applications, such as in speakerphones. Its low power consumption and ability to operate at low voltages make it suitable for line-powered devices.
Q & A
- What is the minimum supply voltage for the MC34119D?
The minimum supply voltage for the MC34119D is 2.0V.
- What is the purpose of the differential output in the MC34119D?
The differential output maximizes the available voltage swing at low voltages.
- How can the MC34119D be powered down?
The MC34119D can be powered down using the CD pin by setting it to a logic '1' (≥2.0V).
- What is the typical open loop gain of Amplifier #1?
The typical open loop gain of Amplifier #1 is ≥80 dB at frequencies ≤100 Hz.
- What is the recommended load impedance for the MC34119D?
The recommended load impedance is 8.0 Ω or greater.
- What is the maximum peak load current for the MC34119D?
The maximum peak load current is ±200 mA.
- How does the MC34119D handle power supply rejection?
Pins FC1 and FC2 allow for controlling power supply rejection with the use of capacitors.
- Is the MC34119D still in production?
No, the MC34119D is obsolete and no longer manufactured.
- What are some available substitutes for the MC34119D?
Available substitutes can be found through suppliers like DigiKey, which suggest similar audio amplifier ICs.
- What is the operating temperature range for the MC34119D?
The operating temperature range is -20℃ to +70℃.
