AudioAMP 11 Click Board™

Product Code: MIKROE-5584

How Does The AudioAMP 11 Click Board™ Work? The AudioAMP 11 Click Board™ is based on the NAU8224, a stereo Class-D audio amplifier from Nuvoton Technology. Besides an excellent quantity performance, such as high efficiency, the NAU8224 is also characterized by high output power and low quiescent current. It can drive a 4Ω load with up to 3.1W output power. This audio amplifier is designed to reduce high-frequency emissions with the ferrite bead filters on its outputs (speaker channels). The ferrite beads have a low impedance in the audio range, and because of that, they act as a pass-through filter in the audio frequency range. Furthermore, the NAU8224 has several protection features like thermal overload, short circuit, and supply under-voltage protection allowing a reliable operation. The AudioAMP 11 Click Board™ communicates with MCU using the standard I2C 2-Wire interface to read data and configure settings, supporting a Fast Mode operation up to 400kHz. The NAU8224 can be enabled or disabled using the EN pin of the mikroBUS™ socket, offering a switch operation to turn ON/OFF the audio amplifier.

In addition to its possible digital control, the NAU8224 also has several gain settings, such as 6dB, 12dB, 18dB, and 24dB, selectable via onboard switches labelled as GAIN SEL. This audio amplifier also provides register-programmable volume control next to the hardware gain selection. This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. However, the Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used, as a reference, for further development. SPECIFICATIONS Type Amplifier Applications Can be used for various types of consumer audio equipment applications such as personal media players, portable MP3 players, and more On-board modules NAU8224 - audio amplifier from Nuvoton Technology Key Features Powerful stereo audio amplifier, Class-D, selectable gain and volume, 4Ω load drive, high efficiency and performance, I2C interface, low power consumption, Click Board™-and-pop suppression, Shutdown mode, and more Interface I2C Compatibility mikroBUS Click board size L (57.15 x 25.4 mm) Input Voltage 3.3V or 5V PINOUT DIAGRAM This table shows how the pinout of the AudioAMP 11 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns). Notes Pin Pin Notes NC 1 AN PWM 16 NC Enable EN 2 RST INT 15 NC NC 3 CS RX 14 NC NC 4 SCK TX 13 NC NC 5 MISO SCL 12 SCL I2C Clock NC 6 MOSI SDA 11 SDA I2C Data Power Supply 3.3V 7 3.3V 5V 10 5V Power Supply Ground GND 8 GND GND 9 GND Ground ONBOARD SETTINGS AND INDICATORS Label Name Default Description LD1 PWR - Power LED Indicator JP1 VCC SEL Left Logic Level Voltage Selection 3V3/5V: Left position 3V3, Right position 5V SW1 GAIN SEL Left 24dB Gain Selection SW2 GAIN SEL Left 18dB Gain Selection SW3 GAIN SEL Left 12dB Gain Selection SW4 GAIN SEL Left 6dB Gain Selection AUDIOAMP 11 CLICK ELECTRICAL SPECIFICATIONS Description Min Typ Max Unit Supply