LM386

From DIY_Wiki
Jump to: navigation, search
LM386
Gain1 8Gain
In -2 7Bypass
In +3 6V+
Ground4 5Out

The LM386, a.k.a. JRC386, a.k.a. NJM386 is a low-power amplifier chip. It is able to directly drive a small speaker, and is thus used in a number of battery-powered practice amp designs.

Models

Chip Name Supply Voltage Min. Output Power Typical Output Power
LM386N-1 4-12 V 250 mW 325 mW
LM386N-3 4-12 V 500 mW 700 mW
LM386N-4 5-18 V 700 mW 1000 mW

Voltage reference trick

The LM386 has a self-centering output voltage. In other words, if there's no signal at it inputs, its output sits at half the supply voltage. Because of this, the 386 can be used as a source of a buffered bias voltage in stompbox circuits.

Used in

List of integrated circuits
Opamps Single: 741 · LM308 · NE5534 · TL0x1 · Dual: 4558 · LM358 · LF353 · LF442 · NE5532 · OPA2134 · TL0x2 · Quad: TL0x4
OTA Single: CA3080 · CA3094 · Dual: LM13x00
CMOS 4000 4013 · 4046 · 4049 · 4051 · 4052 · 4053 · 4066 · 4069 · 4093 · 40106
Delay BBD: MN3001 · MN3005 · MN3007 · MN3008 · MN3205 · MN3207 · MN3208 · SAD512 · SAD1024 · Digital: PT2399
Power Voltage regulators: 78xx · 79xx · LM317 · LM337 · Charge pumps: ICL7660 · LT1054 · MAX1044
Programmable Atmel AVR MCUs · Microchip PIC MCUs
Misc 555 · LM386 · LM391x