MAX4609ESE

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Analog switch and multiplexer/demultiplexer circuits are indispensable components in many analog and digital systems. They serve a crucial purpose in helping electrically connect or disconnect two or more circuits. Among the various analog switches and mux/demux devices is the MAX4609ESE, which not only offers many of the benefits of traditional analog switches and mux/demux circuits but can also minimize mis-matches between the inputs of an analog multiplexer.

Applications

The MAX4609ESE is an integrated, low-noise 8-channel CMOS multiplexer/demultiplexer. It is specifically designed for transmission and reception of low-level signals in applications including data communications, industrial control systems, data-acquisition systems and test and measurement. This is because it offers a low distortion, low-noise performance with high common-mode rejection and high power supply rejection.

The MAX4609ESE consists of a pair of 8-channel switches which control 4 differential pairs of (RX, TX) interfaces for up to 16 independent channels of communication. The differential pairs can be configured in either two 4-channel blocks, two 2-channel blocks, or four 1-channel blocks. In addition, the two switches can be operated in differential mode, allowing measurements to be taken from the two ends of a single differential receiver.

Working Principle

The MAX4609ESE switch consists of four pairs of CMOS multiplexers/demultiplexers. It is controlled by a 4-bit control logic which consists of four single-ended control inputs (C0-C3). The C0 input is used to determine the active channel (the RX channel) and the other three inputs (C1-C3) are used to select the TX channel.

The switches feature differential outputs and inputs with a low on-resistance of 0.2Ω. The high common-mode range of the differential outputs is enabled by a smooth transition between the zero and one threshold logic levels. The low on-resistance of the switch also helps reduce distortion and noise in the overall signal path.

The device also provides shutdown control, which allows the system to be turned on or off with a single control signal. This feature helps reduce the system power consumption and improve noise immunity in the analog signal path.

The MAX4609ESE also offers integrated ESD protection for both the inputs and outputs, making it a great choice for systems with demanding ESD requirements.

Conclusion

The MAX4609ESE is a low-noise 8-channel CMOS multiplexer/demultiplexer. It features differential outputs and inputs with a low on-resistance of 0.2Ω and a high common-mode range of the differential outputs. It is designed to minimize mis-matches between the inputs of an analog multiplexer and also provides integrated ESD protection for both the inputs and outputs. It is perfect for applications including data communications, industrial control systems, data-acquisition systems and test and measurement, as it offers a low distortion and low-noise performance with high common-mode rejection and power supply rejection.

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