DG181AP/883

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The DG181AP/883 are logic-controlled analog switches designed specifically to handle fine signal control applications. These analog switches are monolithic integrated circuits manufactured using a silicon-gate CMOS process for excellent performance and low power dissipation.

The DG181AP/883 analog switches use N-channel MOS field effect transistors to provide low on-resistance paths and have a voltage rating of +-20V. In the off-state, the DG181AP/883 analog switch provides very high resistances (open circuit). The DG181AP/883 requires almost no power to turn it on or off and can be operated continuously at currents up to 75mA.

The DG181AP/883 can be used in many applications including multiplexers, demultiplexers, analog switches, precision over-voltage limiters, and translinear circuits. Its excellent switching characteristics, low power dissipation, low leakage current, and wide range of input/output voltages make it suitable for a variety of applications. It can be used to switch analog signals between two or more sources, or to act as a voltage shift between different voltage domains.

The working principle of DG181AP/883 is based on bipolar junction transistors. The transistors are connected in series such that when one transistor is on and the other is off, the signal is passed from one transistor to the other. This is the fundamental principle used in the DG181AP/883 analog switch.

The basic circuit of the DG181AP/883 can be divided into three sections: the common emitter, the emitter-follower, and the output section. The input signals, which may be analog or digital, are connected to the common emitter. When a positive input signal is applied, the transistor turns on and the output voltage is determined by the position of the emitter-follower transistor. If the emitter-follower transistor is connected to a voltage source, the output voltage is equal to the voltage of the voltage source. However, if the emitter-follower transistor is connected to ground, the output voltage is equal to zero.

The output section of the DG181AP/883 consists of a PNP transistor, an NPN transistor, and an inverter. The PNP transistor is connected to the emitter-follower transistor and provides the signal to the output terminal. The NPN transistor is connected between the collector of the PNP transistor and ground, and is used as a switch to turn on and off the output signal. The output signal is then inverted by the inverter and sent to the output terminal.

The DG181AP/883 is a very useful power-saving device and can be used in various applications such as switching devices, signal conditioners, and current limiters. It is suitable for applications where low distortion and low power dissipation is required. In addition, the DG181AP/883 can also be used to transfer signals from one voltage domain to another and is ideal for applications where low voltage signals need to be transferred to high voltage domains.

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