LM386
| Gain | 1 | 8 | Gain |
| In - | 2 | 7 | Bypass |
| In + | 3 | 6 | V+ |
| Ground | 4 | 5 | Out |
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
|
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