ADG419BRZ

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The ADG419BRZ is an integrated circuit device that is used as a low-voltage, analog multiplexer and demultiplexer. This device is commonly found within industrial, commercial, communications and military circuitry, providing control and routing of analog signals. It is categorized under the “Interface" - Analog Switches, Multiplexers, Demultiplexers. The ADG419BRZ multiplexer/demultiplexer has four differential analog inputs that can be selected individually or in pairs. The differential inputs are then routed through the multiplexer or demultiplexer circuitry to an output port. This IC can be used in various power supply voltages, from ±5V to ±15V.

The multiplexer/demultiplexer circuitry requires the following main components to operate: a voltage reference, an input selector, a control logic circuit and internal buffers. The ADG419BRZ is designed with a high-precision voltage reference of ±3V, which allows input signals with a wide range of gains to be accurately routed. The input selector of this device is composed of two N-channel MOSFETs, two P-channel MOSFETs and two diodes. These components control the selection of the input signals based on the logic signals SEL1, SEL2, SEL3 and SEL4. Through the combination of these control signals, the device can be used as either a multiplexer or demultiplexer.

The control logic circuit is composed of a combination of CMOS inverters, transmission gates and P/N MOSFETs. This circuit controls the selection of the input signals and is responsible for optimizing gain and linearity characteristics of the device. The internal buffers, which are composed of N-channel MOSFETs, are used for the controlled connection of the four differential inputs to the output port. The high-speed switching action allows for fast selection and routing of analog signals.

The ADG419BRZ allows for low-voltage, low-power operation and is suitable for a wide range of analog applications. It can be used in telecommunications systems, motor control systems, audio mixing and signal routing systems. The ADG419BRZ provides an ideal input to output isolation of up to 1,500Vrms. Thanks to its small size and low power consumption, it is easy to incorporate into any design.

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