DG409DJ+

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The DG409DJ+ is an 8-channel analog multiplexer/demultiplexer IC designed for high-speed switching of multiple channels. Designed by Analog Devices Inc., it is applicable for a variety of applications, including stream switching, data communication, audio switching, and data routing. With its low power dissipation, high bandwidth, fast switching time, and excellent channel-to-channel isolation characteristics, the DG409DJ+ is suitable for a range of critical applications.

Functionally, the DG409DJ+ is an analog switching device with a non-inverting input and inverting 8-channel output. It has a 4-Channel Multiplexer/Demultiplexer configuration with a few pins dedicated to controlling its operation. It has an input-enable (EI) input pin, a channel select (S) input pin, and an output-enable (EO) output pin. With this multiplexer/demultiplexer configuration, the DG409DJ+ can be used to switch multiple analog signals from one channel to another. It can also be used to direct signal flow in either direction.

The DG409DJ+ has an excellent signal quality, with a linear frequency response from DC to >50MHz. Its signal-to-noise ratio is 80 dB, and its signal-to-noise-plus-distortion (SNDR) ratio is 80 dB. The on-resistance (ROn) of the pin drivers is excellent, with values ranging from 2.3 Ω to 7.8 Ω. The off-isolation (ISO) of the multiplexer is excellent as well, with values ranging from 90 dB to 95 dB. This allows the user to have an optimal performance of the circuit in terms of signal accuracy and signal integrity.

The DG409DJ+ is designed to be both low power and fast switching. Its typical propagation delay time is typically 150ns, with a maximum switching time of 200ns. Its power dissipation is typically 60mW per channel, with a maximum of 90mW. This makes it an ideal device for low-power applications, where speed and power efficiency are both important.

The input enable (EI) and output enable (EO) signals control the flow of signals inside the DG409DJ+. In order for the device to operate correctly, the input enable signal must be enabled for the multiplexer to work. Once the input enable signal is enabled, the channel select pin is then used to select which channel the signal will be routed to. The output enable signal is used to disable the output of the multiplexer, preventing the signal from being routed to the output. When both input and output enable signals are enabled, the multiplexer will start routing the signal.

The DG409DJ+ is suitable for a wide range of critical applications, such as video switching, audio mixing and switching, data routing, and stream switching. Its low dissipation, high bandwidth, fast switching and excellent isolation characteristics make it an ideal device for such applications. The DG409DJ+ may be used to switch multiple channels in any direction, with the ability to enable and disable routes through the use of the input-enable (EI) and output-enable (EO) signals.

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