
ADA4740 · AdafruitActive

Adafruit product #4740.
| Part number | ADA4740 |
|---|---|
| Manufacturer | Adafruit |
| Category | Audio › Amplifiers & Audio Modules |
| Pins | 28 |
Adafruit MIDI FeatherWing Kit pinout
| Pin | Name | Type | Description |
|---|---|---|---|
| 1 | VBAT | power | |
| 2 | EN | bidirectional | |
| 3 | USB | power | |
| 4 | N | bidirectional | |
| 5 | M | bidirectional | |
| 6 | L | bidirectional | |
| 7 | K | bidirectional | |
| 8 | J | bidirectional | |
| 9 | I | bidirectional | |
| 10 | H | bidirectional | |
| 11 | SCL | bidirectional | |
| 12 | SDA | bidirectional | |
| 13 | RESET | bidirectional | |
| 14 | 3.3V | power | |
| 15 | AREF | bidirectional | |
| 16 | GND | ground | |
| 17 | A | bidirectional | |
| 18 | B | bidirectional | |
| 19 | C | bidirectional | |
| 20 | D | bidirectional | |
| 21 | E | bidirectional | |
| 22 | F | bidirectional | |
| 23 | SCK | bidirectional | |
| 24 | MOSI | bidirectional | |
| 25 | MISO | bidirectional | |
| 26 | MIDI_RX | bidirectional | |
| 27 | MIDI_TX | bidirectional | |
| 28 | G | bidirectional |
Schematic symbol and footprint
Schematic symbol
Footprint: Adafruit MIDI FeatherWing Kit (3.5mm Jacks) (header pads) — to scale, pad 1 in yellow (mm). Check against the datasheet before ordering PCBs.
Datasheet
Where to buy
Stock and prices from the suppliers, checked 2026-10-08; excluding tax and shipping.
Related parts

Adafruit I2S 3W Class D Amplifier Breakout - MAX98357AADA3006

Adafruit I2S Stereo Decoder - UDA1334A BreakoutADA3678

Adafruit Mono 2.5W Class D Audio Amplifier - PAM8302ADA2130

CO2 Unit with Temperature and humidity Sensor (SCD40)U103

Stereo 2.1W Class D Audio Amplifier - TPA2012ADA1552

Stereo 2.8W Class D Audio Amplifier - I2C Control AGC - TPA2016ADA1712

Stereo 20W Class D Audio Amplifier - MAX9744ADA1752

Adafruit Audio BFF Add-on for QT Py and XiaoADA5769