Overview
The MC34119DTBR2 is a low-power audio amplifier integrated circuit designed primarily for telephone applications, such as in speakerphones. It is part of the MC34119 series from Motorola, now part of NXP Semiconductors. This amplifier is notable for its low voltage operation, starting from a minimum supply voltage of 2.0 V, making it suitable for line-powered devices. The IC features a differential output to maximize voltage swing at low voltages and includes power-down and noise rejection capabilities.
Key Specifications
| Characteristics | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage | VCC | 2.0 | 16 | Vdc | |
| 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 | °C | |
| Open Loop Gain (Amplifier #1, f < 100 Hz) | AVOL1 | 80 | dB | ||
| Closed Loop Gain (Amplifier #2, VCC = 6.0 V, f = 1.0 kHz, RL = 32 Ω) | AV2 | -0.35 | 0 | +0.35 | |
| Package | 8-TSSOP | ||||
| Output Type | 1-Channel (Mono) | ||||
| Max Output Power x Channels @ Load | 400mW x 1 @ 100 Ohm |
Key Features
- Low Power Operation: The MC34119DTBR2 operates with a supply voltage as low as 2.0 V, making it suitable for battery-powered and line-powered applications.
- Differential Output: Provides a differential output to maximize the available voltage swing at low voltages.
- Power-Down Capability: The CD pin allows the IC to be powered down for muting purposes and to conserve power.
- Noise Rejection: Pins FC1 and FC2 enable control over power supply rejection and noise, with capacitors at these pins affecting turn-on time and noise rejection.
- High Gain: Amplifier #1 has an open loop gain of ≥80 dB at frequencies below 100 Hz.
- Unity Gain Stability: The amplifier is unity gain stable with a unity gain frequency of approximately 1.5 MHz.
Applications
The MC34119DTBR2 is primarily designed for telephone applications, including speakerphones and other low-voltage audio amplification needs. It is also suitable for other low-power audio systems where differential output and power-down capabilities are beneficial.
Q & A
- What is the minimum supply voltage for the MC34119DTBR2?
The minimum supply voltage is 2.0 V. - What is the maximum ambient temperature for the MC34119DTBR2?
The maximum ambient temperature is 70°C. - What is the typical open loop gain of Amplifier #1?
The typical open loop gain of Amplifier #1 is ≥80 dB at frequencies below 100 Hz. - How does the CD pin function?
The CD pin allows the IC to be powered down for muting purposes and to conserve power. - What is the purpose of pins FC1 and FC2?
Pins FC1 and FC2 are used to control power supply rejection and noise, and they affect the turn-on time of the circuit. - What is the maximum output power of the MC34119DTBR2?
The maximum output power is 400mW x 1 @ 100 Ohm. - What is the package type of the MC34119DTBR2?
The package type is 8-TSSOP. - Is the MC34119DTBR2 RoHS compliant?
No, the MC34119DTBR2 is not RoHS compliant. - What is the load impedance range for the MC34119DTBR2?
The load impedance range starts at 8.0 Ω. - What is the differential gain of the MC34119DTBR2?
The differential gain is up to 46 dB within a 5.0 kHz bandwidth.
