스테레오 헤드폰 앰프 모듈 -MAX9723
(HEADPHONE AMP 2 CLICK)
개요
- 본 제품은 스테레오 헤드폰 앰프 모듈 -MAX9723 입니다.
- BassMAx, 볼륨제어, I2C 인터페이스를 가진 MAX9723 스테레오 헤드폰 앰프 칩을 기반으로 디자인된 제품입니다.
- 16오옴 부하에 62mW를 전달할수 있으며 32 레벨 볼륨 제어가 가능합니다.
특징
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HOW DOES IT WORK?
Headphone AMP 2 Click is based on the MAX9723, a stereo DirectDrive headphone amplifier with BassMax, volume control, and I2C from Analog Devices. The headphone amplifier uses a DirectDrive architecture that produces a ground-referenced output from a single supply, thus eliminating the need for large DC-blocking capacitors. Its outputs are biased at 0V, making the amplifier outputs not have a DC component, improving a low-frequency response. The DirectDrive architecture uses a charge pump to create an internal negative supply voltage, which makes the dynamic range from a single supply almost double.
Software-enabled bass boost (BassMax) boosts the bass response of the amplifier, improving audio reproduction when using inexpensive headphones. This, in particular, comes in handy when reproducing low frequencies, where the limitations of the small physical size of the diaphragm are compensated by increasing the amplifier gain. The maximum amplifier gain on this chip is +6dB. The volume control adjusts the gain of the output amplifiers according to your needs over the software. The amplifier can enter the low-power shutdown mode, where the host MCU controls the shutdown mode.
Headphone AMP 2 Click uses a standard 2-Wire I2C interface to communicate with the host MCU supporting clock rates of up to 400KHz. The shutdown control is available on the SHD pin of the mikroBUS™ socket. In addition to the 3.5mm input and output audio jacks, there are corresponding two channels input and output headers in case of the need to connect inputs or outputs incompatible with jack connectors (wire-types).
This Click board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. However, the Click board™ comes equipped with a library containing functions and an example code that can be used, as a reference, for further development.
SPECIFICATIONS
Type Amplifier,Signal Processing Applications Can be used for the development of PDA audio, portable players, mini-Disc players, and more On-board modules MAX9723 - stereo DirectDrive headphone amplifier with BassMax, volume control, and I2C from Analog Devices Key Features DirectDrive headphone amplifier eliminates bulky DC-blocking capacitors, single supply operation, integrated 32-level volume control, high PSSR, low THD+N, click-and-pop suppression, short-circuit, and thermal-overload protection, software-enabled Bass Boost, and more Interface I2C ClickID Yes Compatibility mikroBUS Click board size L (57.15 x 25.4 mm) Input Voltage 3.3V