Overview
The LM386MX-1, produced by National Semiconductor, is a low-voltage audio power amplifier designed for consumer applications. This model is part of the LM386 series, known for its low power consumption, high gain, and minimal external component requirements. The LM386MX-1 is particularly suited for battery-operated devices due to its low static power dissipation of 24mW when operating from a 6V supply. Its internal gain is set to 20, but it can be adjusted to any value between 20 and 200 by adding external components. This makes it a versatile choice for portable audio devices, AM-FM radios, and other low-power applications.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Supply Voltage | 4 - 12 | V | |
| Quiescent Current | 4 | mA | |
| Gain | 20 - 200 | Adjustable with external components | |
| Input Impedance | 50 | kΩ | |
| Output Impedance | 8 | Ω | |
| Output Power | 325 | mW | @ 8Ω load |
| Bandwidth | 300 | kHz | |
| THD + Noise | 0.2 | % | @ 1kHz, 125mW |
| Package | SOIC-8 |
Key Features
- Low power consumption, ideal for battery-operated devices.
- Wide supply voltage range from 4V to 12V.
- Adjustable gain from 20 to 200 with minimal external components.
- Input referenced to ground, output automatically biased to half the supply voltage.
- Low distortion: 0.2% at 1kHz with 125mW output power.
- Compact 8-pin SOIC package for space-constrained applications.
Applications
The LM386MX-1 is widely used in portable audio devices such as AM-FM radios, portable tape players, and intercom systems. Its low power consumption and compact size make it ideal for battery-powered applications. Additionally, it is used in TV sound systems, line drivers, ultrasonic drivers, and small servo drivers. Its versatility and ease of use have made it a popular choice among designers and manufacturers in the consumer electronics industry.
Q & A
1. What is the typical supply voltage range for the LM386MX-1?
The typical supply voltage range is 4V to 12V.
2. Can the gain of the LM386MX-1 be adjusted?
Yes, the gain can be adjusted from 20 to 200 by adding external resistors and capacitors between pins 1 and 8.
3. What is the output power of the LM386MX-1?
The output power is 325mW when driving an 8Ω load.
4. Is the LM386MX-1 suitable for battery-operated devices?
Yes, its low quiescent current and low power dissipation make it ideal for battery-powered applications.
5. What is the package type of the LM386MX-1?
It is available in an 8-pin SOIC package.
6. What is the input impedance of the LM386MX-1?
The input impedance is 50kΩ.
7. What is the typical distortion level of the LM386MX-1?
The typical distortion level is 0.2% at 1kHz with 125mW output power.
8. Can the LM386MX-1 be used in AM-FM radios?
Yes, it is commonly used in AM-FM radios and other portable audio devices.
9. What is the bandwidth of the LM386MX-1?
The bandwidth is 300kHz.
10. What is the operating temperature range of the LM386MX-1?
The operating temperature range is 0°C to 70°C.
