Adafruit 2.8W Class D Audio Amplifier with AGC – I2C
• Perfect addition to any audio project
• 2.8W with 4 ohm speakers, 1.7W at 8 ohm
• Selectable gain from -28dB to +30dB over I2C
• Speakers not included
• Soldering required
• Arduino library available here
• Support page available hereGreat performance for power consumed
This is a compact stereo amplifier with automatic gain control for all of your musical and sound generating needs in an Arduino project, and is easily controlled over I2C.
Thanks to the Class D amplifier there is less heat generated, which saves power and provides an incredible 89% energy efficiency rating with 8 ohm speakers using a 5V suppler. Provides you with two 2.8W channels using 4 ohm speakers, or two 1.5W channels using 8 ohm speakers.How to pick the right speaker
You need to ensure that the wattage of the speakers is greater than that of the wattage being fed through. This amp is designed mostly for 4 ohm and 8 ohm speakers, higher ohm speakers may be used but will generate a large amount of heat.Does this require an Arduino?
An Arduino is not required. This amplifier may be used independently and will provide a 6dB gain and benefit from the aid of the AGC. A microcontroller is advised for it to be configured as it is quite powerful, but this is not required.What Arduino library will I need?
Adafruit have provided their own library to make this amplifier work seamlessly, available here
. This will be used for AGC configuration, gain, turning individual channels or the whole system off – all over i2C.
Tutorial and support pages avialable here
| Voltage Input
|| 2.7 – 5.5 V DC
| Compatible Speakers
|| 4 ohm up to 2.8 W
|| 8 ohm up to 1.5 W
| Adjustable Gain Range
|| -28 to +30 dB
| Dimensions (W x D x H)
|| 28 mm x 22 mm x 3 mm
|| 2 g
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