ADG201AKN

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ADG201AKN is a monolithic CMOS device with four single pole/single throw (SPST) switches, each switch having an asynchronous NO (normally open) and NC (normally closed) pole. Used alone, these switches are suitable for direct-coupled or single-supply systems, allowing both on (conducting) and off (non-conducting) state switching of analog signals with minimal DC and AC disturbances. In combination, the switches provide a wider range of application areas with higher flexibility than is possible with single switch devices, making the ADG201AKN a popular choice in a wide range of industry segments.

ADG201AKN is a type of analog multiplexer, which is usually used to switch between two or more analog signals. It is the most fundamental form of analog switch, since the circuit is designed to route one of several input signals to a common output. The application areas for such switches are vast – it can be used for communication interface, test equipment, audio/video applications, industrial systems and more.

The main principle behind any multiplexer is its ability to route signals from multiple inputs to one single output. The ADG201AKN is no different, as it utilizes a model that is inherently connected to both the input side (or control circuitry) and the output side (or data bus). The control side of the switch can be considered to function as a selection controller, which distinguishes which input gets routed to the output. This is done by selecting the right channel in the multiplexer, based on the voltage applied on the selection inputs – the higher the voltage, the more likely it is that the selected channel will be routed to the output.

The ADG201AKN is equipped with two digital selection inputs: A and B. When the selection inputs are Logic 0 (GND), the output is defined by the logic level of the NO pins. When the selection inputs are Logic 1 (VCC), the output is defined by the logic level of the NC pins. This enables the ADG201AKN to easily switch between two inputs without any external components, providing an easy way to switch between signals without the need to use a lot of external circuitry.

As far as switch speed is concerned, the ADG201AKN is a slow switch. It has a specified delay time of approximately 100µs (0.1ms). This makes the device suitable for data-rates up to 1MHz, but unsuitable for switching high frequency signals. Note that the ADG201AKN also has a high off-leakage current, which again, limits its application to low frequency switching.

To sum it up, the ADG201AKN is a type of analog multiplexer, specially designed to route one of several analog signals to a common output. It works on the simple principle of “selecting the right channel” depending on the voltage applied on its selection inputs. Being slow, the device is most suitable for data-rates up to 1MHz, but its low on-resistance (typical 20Ω maximum on-state resistance at 5V) and wide operating temperature range (-40°C to +85°C, allow it to be used in all sorts of industrial, audio/video and communication applications.

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