DG387BDJ

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Interface devices have been developed to bridge the gap between digital circuitry, or input/output devices, and the analog positions. They are specifically designed to translate, process and transfer electrical signals to other electronic devices. In this article, we\'ll take a comprehensive look into the DG387BDJ application field and working principle.

DG387BDJ Application Field

The DG387BDJ is a single 8-channel analog switch which belongs to Analog Switch and Multiplexer/Demultiplexer family of devices. These devices are often used to multiplex or demultiplex signals, with the DG387BDJ being especially suitable for simultaneous switching applications, since each channel is independent of the others. These integrated circuits feature a wide application range, from multiplexing and demultiplexing of digital audio data in a surround sound system, to switching video lines from a video camera to an LCD display.

DG387BDJs are also used in medical applications, such as to switch test signals from video monitors, or to switch multiple audio signals from one amplifier to another. In addition, they are used for a variety of communication, industrial, and control applications. They are often found in remote junction boxes, control equipment, and in digital signal processing (DSP) systems.

DG387BDJ Working Principle

The DG387BDJ consists of 8 independent SPST analog switches. These switches are single-pole, single-throw (SPST) analog switches, meaning they can be used to switch one connection between two analog signals. Each switch is controlled by a corresponding logic level control input. When the logic level input is high, the analog switch is closed and the connected signals can pass through. When the logic level input is low, the analog switch is open and the connection between the two signals is opened.

The DG387BDJ features low on resistance, low leakage currents and very fast switching times (2ns Typ), ensuring precise analog switching even in high frequency applications. Furthermore, it has the capability of storing the last state of each channel, meaning if a channel is left unpowered it will default to the same state when it is switched back on. This feature is particularly useful for saving power when the device is not in use.

Additionally, the DG387BDJ features integrated protection circuitry which protects against electrostatic discharge (ESD) and power surges. This prevents any damage to the device while still providing accurate switching performance. It also includes an enable/disable pin, which when driven low can disable all switches.

Conclusion

The DG387BDJ is a single 8-channel analog switch, offering precise analog switching with fast switching times and integrated protection circuitry. It is suitable for multiplexing and demultiplexing of digital audio and video signals, as well as many other communication, industrial and control applications. Its low on resistance, low leakage currents and integrated protection circuitry ensure that the DG387BDJ continues to provide accurate switching performance in a variety of environments.

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