AON4803

AON4803 is an advanced, low power, low voltage CMOS analog switch array, which is specially developed for wireless earphone application. It is embedded with integrated charge pump, dual switch pairs and a wide range of features. This switch array can support low voltage and high supply voltage range, as well as fast switching for all kinds of digital audio and video transmission. In addition, it can provide low standby power, efficient current sharing and high reliability.

Compared with the traditional switch that is constructed by discrete components, this one-chip solution could be applied in twin-channel configuration. Thus, the traditional switch cost and complexity could be reduced. The AON4803 switch array can also be tailored to different wireless earphone designs as it is compatible with different power options, like voltage regulator, CR-type transformers and input voltage diodes. It can also be used in common-mode filtering, which helps to improve the overall audio quality of the wireless earphone.

Talking about its working principle, AON4803 switch array utilizes the low power process technology, the voltage controlled switch elements and the deep submicron process to achieve its high performance. The switch element is constructed by two n-channel MOSFETs and two p-channel MOSFETs. The switch array also features dual switch pairs, 2:1 input multiplexer and PWM amplifiers. It can provide high bandwidth up to 140MHz. Each switch pair can be operated over a wide range from -50mV to 6V. Usually, the users program the minimum and the maximum voltage of the switches via the digital inputs. During operation, the signal current can flow in the control sub-circuit to reduce the signal distortion to ensure the signal quality.

AON4803 is ideal for a wide range of applications, such as wireless earphones. It supports input signal up to 6V, output signal up to 10V and can work across a wide temperature range. Moreover, this analog switch array is compatible with a variety of battery and DC power sources. Besides, it can also be used in low power wireless microphones and portable radio systems. In addition, it is easy to integrate with the existing integrated circuit design, which greatly minimizes the circuit complexity and costs. All of the above advantages make this switch array one the popular choice in the fields of audio and video transmission.

To sum up, the AON4803 switch array could be an excellent choice for many applications, such as wireless earphones, portable radio system, low power microphone and so on. It is a versatile solution that allows both low operating power and fast switching for digital audio and video transmission. Moreover, it features integrated charge pumps and dual switch pairs, providing great flexibility to the users. Last but not least, its compatibility with various battery and DC power sources makes it convenient to use and greatly reduces the circuit complexity and costs.