LM386N

Low Voltage Audio Power Amplifier LM386 FEATURES • • • • • • • • • Battery operation Minimum external parts Wide supply voltage range 4V to 12V Low quiescent current drain 4mA (Typ.) Voltage gains from 20 to 200 ESD Protection 2kV Ground referenced input Self-centering output quiescent voltage Low distortion SOP-8 DIP-8 APPLICATIONS • • • • • • • • AM-FM radio amplifier Portable tape player amplifiers Intercoms TV sound systems Line drivers Ultrasonic drivers Small servo drivers Power converters ORDERING INFORMATION Device Package LM386D SOP-8 LM386N DIP-8 DESCRIPTION The LM386 is a power amplifier designed for use in low voltage consumer applications. The gain is internally set to 20 to keep external part count low, but the addition of an external resistor and capacitor between pins 1 and 8 will increase the gain to any value up to 200. The inputs are ground referenced while the output is automatically biased to one half the supply voltage. The quiescent power drain is only 24 milliwatts when operating from a 6V supply, making the LM386 ideal for battery operation. ABSOLUTE MAXIMUM RATINGS (Note 1) CHARACTERISTIC SYMBOL MIN. MAX. UNIT Supply Voltage VCC - 15 V Input Voltage VIN -0.4 0.4 V Operating Ambient Temperature Range TA -40 85 °C Junction Temperature TJ - 125 °C Note1. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. Feb. 2020 – R1.1 1/8 HTC Low Voltage Audio Power Amplifier LM386 RECOMMENDED OPERATING CONDITIONS (Note 2) CHARACTERISTIC SYMBOL MIN. MAX. UNIT Supply Voltage VCC 4 12 V Operating Free-Air Temperature Range TA 0 70 °C Note 2. The device is not guaranteed to function outside its operating ratings. ORDERING INFORMATION Package Order No. Description Supplied As Status SOP-8 LM386D Low Voltage Audio Power Amplifier Tape & Reel Active DIP-8 LM386N Low Voltage Audio Power Amplifier Tube Active Feb. 2020 – R1.1 2/8 HTC Low Voltage Audio Power Amplifier LM386 PIN CONFIGURATION SOP-8 DIP-8 GAIN 1 8 GAIN BYPASS IN1(−) 2 7 BYPASS 6 VCC IN1(+) 3 6 VCC 5 VOUT GND 4 5 VOUT GAIN 1 8 GAIN IN1(−) 2 7 IN1(+) 3 GND 4 PIN DESCRIPTION Pin No. Pin Name Pin Function SOP-8 DIP-8 1 1 GAIN 2 2 INPUT (-) Inverting Input 3 3 INPUT (+) Noninverting Input 4 4 GND Ground 5 5 VOUT Output 6 6 VCC 7 7 BYPASS 8 8 GAIN Feb. 2020 – R1.1 Gain Setting Power Supply Voltage Bypass Decoupling Path Gain Setting 3/8 HTC Low Voltage Audio Power Amplifier LM386 FUNCTIONAL BLOCK DIAGRAM Feb. 2020 – R1.1 4/8 HTC Low Voltage Audio Power Amplifier LM386 ELECTRICAL CHARACTERISTICS Specifications with standard type face are for TA = 25°C, RL=8Ω, VCC = 6V, f=1kHz unless otherwise noted. SYMBOL VCC IQ POUT AV BW THD PARAMETER MIN TYP MAX UNIT 4 - 12 V - 4 8 mA VCC = 6V, THD = 10% 250 325 - VCC = 9V, THD = 10% 500 700 - Pin 1 and Pin 8 Open - 26 - 10µF from Pin 1 to Pin 8 - 46 - 10µF from Pin 1 to Pin 8 - 60 - Pin 1 and Pin 8 Open - 300 - POUT = 125mW, Pin 1 and Pin 8 Open - 0.2 - % - 120 - kΩ - 250 - nA Operating Supply Voltage Quiescent Current VIN = 0V Output Power mW Voltage Gain dB Bandwidth Total Harmonic Distortion RIN Input Resistance IBIAS Input Bias Current Feb. 2020 – R1.1 TEST CONDITION kHz Pin 2 and Pin 3 Open 5/8 HTC Low Voltage Audio Power Amplifier LM386 APPLICATION INFORMATION The LM386 is a mono low voltage amplifier that can be used in a variety of applications. It can drive loads from 4Ω to 32 Ω. The gain is internally set to 20 but it can be modified from 20 to 200 by placing a resistor and capacitor between pins 1 and 8. This device comes in three different 8-pin packages as DIP-8 and SOP-8 to fit in different applications. As this is an Op Amp it can be used in different configurations to fit in several applications. The internal gain setting resistor allows the LM386 to be used in a very low part count system. In addition, a series resistor can be placed between pins 1 and 5 to modify the gain and frequency response for specific applications. < Amplifier with Gain=50 > Feb. 2020 – R1.1 6/8 HTC Low Voltage Audio Power Amplifier LM386 TYPICAL OPERATING CHARACTERISTICS T.B.D. Feb. 2020 – R1.1 7/8 HTC Low Voltage Audio Power Amplifier LM386 REVISION NOTICE The description in this data sheet is subject to change without any notice to describe its electrical characteristics properly. Feb. 2020 – R1.1 8/8 HTC