PS381ESE

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Introduction: An Analog Switch (ALS) is a two-input device that can select between two different signals in either analog or digital domains. The device can be operated in either single-pole double-throw (SPDT) or single-pole single-throw (SPST) mode to connect two separate circuits.

PS381ESE Application field and Working Principle

Application Field of PS381ESE

The PS381ESE is an interface chip used for analog switching applications. It is a 8 channel Single Pole Single Throw (SPST) switch, which means that each of its 8 channels operates independently and allows the user to connect 8 separate analog signals to 8 separate destinations. It also works in both digital and analog domain, thus can be used for multiplexing applications in industrial, automotive, and consumer electronics. Moreover, the PS381ESE can act as a bridge between two or more systems, allowing them to pass data through a shared connection.

Working Principle of the PS381ESE

The PS381ESE consists of eight independent SPST switch units. Each individual switch consists of two metal oxide semiconductor (MOS) transistors, commonly referred to as gate and source as a single switch unit. In digital domain, each of the switches can be set to one of two states, either “open” or “closed”, depending on the logic applied to the switch. If a logic 1 is applied to the gate, the switch is “closed”, connecting the two points and allowing for the flow of current. Alternatively, when a logic 0 is applied to the gate, the switch is “open”, blocking the flow of current. In analog domain, the PS381ESE implements a source follower structure, where the output current is a fixed fraction of the input voltage.

The PS381ESE also has an enable pin which can be used to disable all switches at once. This helps in avoiding unwanted current paths and reduces noise as well.

Conclusion

The PS381ESE, a device in Analog Switch, Multiplexers, Demultiplexers class, is a 8 channel Single Pole Single Throw (SPST) switch, which can select between two different signals in either digital and analog domains. It has an enable pin which can be used to disable all switches at once, and can be used in multiplexing applications in industrial, automotive, and consumer electronics.

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