디지털 볼륨 컨트롤 모듈 -NJU72341
(VOLUME 2 CLICK)
개요
- 본 제품은 디지털 볼륨 컨트롤 모듈 -NJU72341입니다.
- NJU72341 2채널 I2C 볼륨 컨트롤 칩을 장착한 제품입니다.
- 2개의 독립적인 오디오 채널을 0에서 95dB 범위사이에서 1db 스텝을 가지고 제어할 수 있습니다.
- I2C 인터페이스로 제어가 가능합니다.
특징
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Type Signal Processing Applications Can be used for stereo and multi-channel audio systems and represents a perfect solution for remote audio volume control applications On-board modules NJU72341 - 2-channel I2C configurable electronic volume IC with an external mute control from NJRC Key Features External mute control, low noise, low distortion, I2C configurable, zero cross detection, vast volume control range, and more. Interface I2C Compatibility mikroBUS Click board size L (57.15 x 25.4 mm) Input Voltage 5V -
Volume 2 Click as its foundation uses the NJU72341, a 2-channel I2C configurable electronic volume IC with an external mute control from NJRC. The NJU72341 operates as an audio signal processor with many characteristics useful in an audio application, such as low noise typical of 2.0µVrms and low distortion of 0.002%. It controls two independent audio channels with a vast volume control range from 0 to 95dB with 1dB step offering zero-cross detection to protect pop noise. That's why this Click board™ is suitable for stereo and multi-channel audio systems.
The NJU72341 has to receive a specific supply voltage to operate appropriately, in this case, 12V. Unlike the Volume Click, which has symmetrical power supply, in this case, we have only one positive power supply. Bringing just a positive power supply, the noise generated by that power supply will transmit to the output, representing a side effect. For this purpose, Volume 2 Click employs a boost converter unit made by combining MIC5235 and MIC2606, both from Microchip. MIC5235 provides 13V out of 5V from the mikroBUS™ power rail, which then the MIC2606, with a feature of massive noise suppression, lowers it to 12V and then supplies NJU72341 reducing the noise generated at its output.
Volume 2 Click communicates with MCU using standard I2C 2-Wire interface, with a clock frequency up to 100kHz in the Standard and 400kHz in the Fast Mode. Also, the user has the option of external mute control configurable through the PWM pin of the mikroBUS™ socket labeled as MTE.
This Click board™ operates only with a 5V logic voltage level. The board must perform appropriate logic voltage level conversion before use with 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