DG390ACWE

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DG390ACWE is an 8-channel analog multiplexer/demultiplexer and analog switch integrated circuit manufactured by National Semiconductor. It is designed to offer a compact, cost reduced, and high performance interface between bus control logic stages and analog signal conditioning circuitry. It is also suitable for use in wide range of applications, including audio and video signal integaration and control.

Application Field

Due to its efficient design and high level of integration, the DG390ACWE is ideal for a broad range of applications, such as analog signal switching, signal routing, and video and audio signal integration and control. It can be used in medical instrumentation, film, video and audio production, broadcast and studio systems, audio mixers and sound reinforcement, as well as in Audio/Video (AV) receivers, decoders, and TVs. It can also be used in car audio and home theater systems, where the multiplexing and switch applications for audio and video signals are critical. In addition, it is suitable for use in communication systems, such as cellular phones and satellite receivers.

Working Principle

The DG390ACWE IC is an 8-channel multiplexer/demultiplexer, which has two ports, an input port and an output port. When a logic high is applied to the SELECT pin, the input port is connected to the output port. This connection will remain until the SELECT pin is returned to logic low. The input and output voltage range is up to 16.5 volts, and the current is up to 1.5mA. The OFF isolation characteristic allows for a maximum switching voltage of 500mV and a maximum switching current of 200mA without interfering with the connected signals. The on-resistance of the multiplexer is less than 240Ω. The maximum propagation delay time is 4μs.

The DG390ACWE multiplexer/demultiplexer is also equipped with a enable pin that controls the pass through of the multiplexer/demultiplexer. It allows for the disconnection of input and output ports when needed. The logic high state results in the pass though of the multiplexer/demultiplexer while logic low inhibits the connection between the two ports. This allows for a maximum switching voltage of 500mV and a maximum switching current of 500mA.

The multiplexer/demultiplexer is also equipped with a gain control circuit. This circuit is used to control the gain of the output signal of the multiplexer/demultiplexer. By adjusting the gain with the aid of two external resistors, the sensitivity of the DG390ACWE IC can be tuned to match specific applications. Additionally, the IC has an internal offset circuit that can be used to adjust the common-mode voltage of the output signals.

The DG390ACWE multiplexer/demultiplexer also has a built-in power-on reset circuit. Whenever the power supply is turned on, the IC automatically resets itself and all the channels are cleared, allowing the IC to start from a known state. The IC also has an ESD protection circuit that protects it from static electricity and surges.

The multiplexer/demultiplexer can be controlled by a range of logic signals, including CMOS, TTL, and ECL. Additionally, the DG390ACWE can be operated in both single-ended and differential-ended modes. The IC also has an adjustable output impedance and is RoHS compliant. The device is available in an 8-pin PDIP (plastic dual in-line package).

The DG390ACWE multiplexer/demultiplexer is an ideal choice for applications that require a low cost, high performance, and reliable interface between the feedback device and analog components. Its ability to switch quickly, along with its built-in protection features, makes it a good fit for a wide range of applications.

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