Overview
The LM386M-1/NOPB is a low voltage audio power amplifier designed by Texas Instruments for use in consumer applications. This device is particularly suited for battery-operated devices due to its low quiescent current and wide supply voltage range. The LM386M-1/NOPB is available in an 8-pin SOIC package, making it compact and suitable for various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Channels | 1 | |
| Package Type | SOIC-8 | |
| Operating Supply Voltage | 4 - 12 | V |
| Quiescent Current (IQ) | 4 - 8 | mA |
| Output Power (POUT) | 250 - 325 | mW (VS = 6V, RL = 8Ω, THD = 10%) |
| Voltage Gain (AV) | 26 - 46 | dB (VS = 6V, f = 1 kHz) |
| Bandwidth (BW) | 300 | kHz (VS = 6V, Pins 1 and 8 Open) |
| Total Harmonic Distortion (THD) | 0.2% | (VS = 6V, RL = 8Ω, POUT = 125 mW, f = 1 kHz) |
| Power Supply Rejection Ratio (PSRR) | 50 | dB (VS = 6V, f = 1 kHz, CBYPASS = 10 μF) |
| Input Resistance (RIN) | 50 | kΩ |
| Input Bias Current (IBIAS) | 250 | nA (VS = 6V, Pins 2 and 3 Open) |
| Operating Temperature Range | 0 - 70 | °C |
| Storage Temperature Range | -65 - 150 | °C |
Key Features
- Battery operation
- Minimum external parts required
- Low quiescent current
- Ground-referenced input
- Voltage gains from 20 to 200
- Self-centering output quiescent voltage
- Low distortion: 0.2% (AV = 20, VS = 6 V, RL = 8 Ω, PO = 125 mW, f = 1 kHz)
- Available in 8-pin SOIC package
Applications
- AM-FM radio amplifiers
- Portable tape player amplifiers
- Intercoms
- TV sound systems
- Line drivers
- Ultrasonic drivers
- Small servo drivers
- Power converters
Q & A
- What is the LM386M-1/NOPB used for?
The LM386M-1/NOPB is a low voltage audio power amplifier used in various consumer applications, including AM-FM radios, portable tape players, intercoms, and more.
- What is the typical operating supply voltage range for the LM386M-1/NOPB?
The typical operating supply voltage range is from 4 V to 12 V.
- How can the gain of the LM386M-1/NOPB be adjusted?
The gain can be adjusted from 20 to 200 by placing an external resistor and capacitor between pins 1 and 8.
- What is the maximum output power of the LM386M-1/NOPB?
The maximum output power is 325 mW when operating at 6 V with an 8 Ω load and 10% THD.
- What is the typical quiescent current of the LM386M-1/NOPB?
The typical quiescent current is 4 mA to 8 mA when the supply voltage is 6 V.
- What is the bandwidth of the LM386M-1/NOPB?
The bandwidth is approximately 300 kHz when the supply voltage is 6 V and pins 1 and 8 are open.
- What is the total harmonic distortion (THD) of the LM386M-1/NOPB?
The THD is 0.2% when the supply voltage is 6 V, the load is 8 Ω, the output power is 125 mW, and the frequency is 1 kHz.
- What is the power supply rejection ratio (PSRR) of the LM386M-1/NOPB?
The PSRR is 50 dB when the supply voltage is 6 V, the frequency is 1 kHz, and a 10 μF bypass capacitor is used.
- What is the input resistance of the LM386M-1/NOPB?
The input resistance is 50 kΩ.
- What is the operating temperature range of the LM386M-1/NOPB?
The operating temperature range is from 0 °C to 70 °C.
