TL2218-285PW

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The TL2218-285PW is an especially designed interface custom system intended for signal termination applications. It is used as a termination interface between components, such as extra channel amplifiers, video receivers, PC input modules, and many others. As it is a signal termination interface, it provides a desirable end-point electric resistance. It also serves as a protector of components. The device is manufactured under ISO requirements and claims a minimum 30 dB cancellation level with a minimum rate of 40dB/decade at a termination resistance of 2750 Ohms. As signal termination increases and the rate of attenuation becomes faster, the device operates at an increased signal-to-noise ratio for noise that is found in the signal path.

The TL2218-285PW works using one or two input ports consisting of a female port and a male port. The male port is a five-pin male port, which is also called a headless port, and is where the signal is input. The female port is connected to the output port, and this is where the termination voltage is output. Both ports are connected using a low-capacitance cable. As the cable is connected, the device creates a termination resistance based on the impedance of the cable. This termination resistance determines the amount of attenuation, or signal-to-noise ratio, which is provided by the device.

The TL2218-285PW also contains a bootstrap resistor that is used to maintain a stable reference voltage within the termination interface. The termination voltage is determined by a voltage divider consisting of two resistors, the upper resistor representing the termination resistance and the lower being the bootstrap resistor. The bootstrap resistor helps in maintaining a constant reference for the circuit, which also acts to reduce noise. The device also has an active biasing voltage that is adjustable, as it is driven by a double-ended loop circuit.

The active biasing voltage is controlled by the host system and can be adjusted to a certain voltage to reflect changes made in the termination resistance. With this, the device is capable of providing an appropriate termination, while avoiding the possibility of it becoming overloaded. The device is also equipped with an ESD protection that helps protect the termination interface from electrostatic discharges.

The overall working of the TL2218-285PW as a signal terminator and interface system relies essentially on the dual combination of low-capacitance cable and the two-resistor voltage divider. The low-capacitance cable is what provides the desired termination resistance. Secondly, the two-resistor voltage divider is responsible for the determination of the termination voltage based on the termination resistance and the associated bootstrap resistor. Lastly, the active biasing voltage and ESD protection helps in providing a controllable and reliable termination.

The TL2218-285PW is an integral component in the development of high-performance systems. Its features of a low-capacitance cable, two-resistor voltage divider, bootstrap resistor, active biasing voltage, and ESD protection provide the necessary termination requirements for high-performance systems, while avoiding the risk of overloading. Lastly, its capability to provide a minimum 30 dB cancellation level with a minimum rate of 40dB/decade at a termination resistance of 2750 Ohms makes it an ideal component for signal termination applications.

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