Overview
The LM386MX-1/NOPB is a low-voltage audio power amplifier produced by Texas Instruments. This device is designed for use in various consumer applications, particularly where low external part count and minimal power consumption are crucial. The LM386MX-1/NOPB operates within a wide supply voltage range of 4 V to 12 V or 5 V to 18 V, making it versatile for different power sources, including battery operation. It features an internally set gain of 20, which can be adjusted up to 200 by adding an external resistor and capacitor between pins 1 and 8.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Manufacturer | Texas Instruments | |
| Package Type | SOIC-8 | |
| Supply Voltage | 4 V to 12 V or 5 V to 18 V | V |
| Quiescent Current | 4 to 8 mA | mA |
| Output Power | 250 to 325 mW (typical at 6 V, 8 Ω load) | mW |
| Voltage Gain | 26 dB (internally set to 20, adjustable up to 200) | dB |
| Bandwidth | 300 kHz | kHz |
| Total Harmonic Distortion (THD) | 0.2% (at 6 V, 8 Ω load, 125 mW output) | % |
| Power Supply Rejection Ratio (PSRR) | 50 dB | dB |
| Input Resistance | 50 kΩ | kΩ |
| Input Bias Current | 250 nA | nA |
| Operating Temperature | 0°C to 70°C | °C |
| Storage Temperature | -65°C to +150°C | °C |
Key Features
- Battery Operation: Suitable for battery-powered devices due to low quiescent current drain.
- Minimum External Parts: Internally set gain reduces the need for external components.
- Wide Supply Voltage Range: Operates from 4 V to 12 V or 5 V to 18 V.
- Adjustable Gain: Gain can be adjusted from 20 to 200 using external resistor and capacitor.
- Low Distortion: Total Harmonic Distortion (THD) as low as 0.2% at specific operating conditions.
- Ground-Referenced Input: Inputs are ground-referenced for ease of use.
- Self-Centering Output Quiescent Voltage: Output automatically biases to one-half the supply voltage.
- Low Power Consumption: Quiescent power drain is only 24 mW when operating from a 6-V supply.
Applications
- AM-FM Radio Amplifiers: Suitable for audio amplification in radio systems.
- Portable Tape Player Amplifiers: Ideal for portable audio devices.
- Intercoms: Used in communication systems requiring low-power audio amplification.
- TV Sound Systems: Can be used to enhance audio in television systems.
- Line Drivers: Drives audio signals over long cables with minimal distortion.
- Ultrasonic Drivers: Suitable for driving ultrasonic transducers.
- Small Servo Drivers: Can be used in servo motor control applications.
- Power Converters: May be used in various power conversion circuits.
Q & A
- What is the typical output power of the LM386MX-1/NOPB?
The typical output power is 250 to 325 mW at 6 V supply voltage and 8 Ω load.
- What is the operating temperature range of the LM386MX-1/NOPB?
The operating temperature range is 0°C to 70°C.
- How can the gain of the LM386MX-1/NOPB be adjusted?
The gain can be adjusted from 20 to 200 by adding an external resistor and capacitor between pins 1 and 8.
- What is the quiescent current of the LM386MX-1/NOPB?
The quiescent current is 4 to 8 mA at a supply voltage of 6 V.
- What is the total harmonic distortion (THD) of the LM386MX-1/NOPB?
The THD is as low as 0.2% at specific operating conditions (6 V supply, 8 Ω load, 125 mW output).
- What are the common applications of the LM386MX-1/NOPB?
Common applications include AM-FM radio amplifiers, portable tape player amplifiers, intercoms, TV sound systems, line drivers, ultrasonic drivers, and small servo drivers.
- What is the package type of the LM386MX-1/NOPB?
The package type is SOIC-8.
- Is the LM386MX-1/NOPB lead-free and ROHS compliant?
Yes, the LM386MX-1/NOPB is lead-free and ROHS compliant.
- What is the input resistance of the LM386MX-1/NOPB?
The input resistance is 50 kΩ.
- What is the power supply rejection ratio (PSRR) of the LM386MX-1/NOPB?
The PSRR is 50 dB at specific operating conditions (6 V supply, 1 kHz frequency, 10 μF bypass capacitor)).
