DG418CJ

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The DG418CJ is a monolithic CMOS dual-channel analog switch with a wide range of applications in Interface - Analog Switches, Multiplexers, Demultiplexers. It is fabricated using ion-implanted technology to achieve low on-resistance, wide dynamic range and fast switching time. This device is available in both single and dual versions, allowing it to fit the needs of various applications. The single version is a dual 4-to-1 multiplexer, while the dual version is a dual 8-to-1 multiplexer.

DG418CJ’s most notable features are its low power dissipation (~50 µW per port), low-on resistance (1.5 ohm typical), high switching speed (tPD=0.2 ns), and its logic interface capability. The logic control input and outputs are compatible with a variety of logic voltages, including TTL, DTL, ECL and PECL. The control inputs determine which of the 4 or 8 analog signals are selected for connection to the common output. All control inputs are TTL/CMOS compatible and are active low. The device has a low voltage supply range of 6V and also a low total power dissipation, making it suitable for many applications.

The versatility of this chip makes it ideal for a wide variety of analog switching applications. It can be used for data communication, precision instrumentation, signal monitoring and switching, audio control, and any other application that requires a low on-resistance switch. The DG418 can be used as a multiplexer, where it can route multiple analog signals to a common output. It can also be used as a demultiplexer, which can route a single analog signal to multiple outputs. It can also be used as a switch, where it is used to connect two or more circuit nodes.

As for the working principle of DG418CJ, the analog signal enters a multiplexing or demultiplexing circuit, operated by the logic control inputs, which selects which one of the 4 or 8 analog inputs is to be connected to the common output. When the logic control inputs are low, the analog outputs are turned off, and the switch is open. When the logic control inputs are high, the analog outputs are connected, and the switch is closed. The on-resistance depends on the type of logic inputs and the particular logic voltage applied.

In conclusion, the DG418CJ is an ideal choice of multiplexer switch for various analog switching applications. It offers a wide range of features, including low power consumption, high switching speed, TTL/CMOS compatibility, and a wide operating voltage range. The low resistance and versatility of the switch make it suitable for a variety of tasks and applications in analog switching. Although this particular device is the single version of the DG418CJ, it is also available in a dual version, offering 8-to-1 multiplexing.

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