DG408CY+

Interface - Analog Switches, Multiplexers, Demultiplexers

Analog switches, multiplexers and demultiplexers are examples of interface technology that allow the control of analog signals between two points in a circuit. DG408CY+ is the industry\'s first integrated level shifting high performance single-channel 3.3V CMOS analog MUX and DEMUX. This application field and its working principle is reviewed below.

DG408CY+ Application Field

The DG408CY+ is an ideal choice for applications where full-scale ranges down to 1.2V must be accommodated. It can handle logic level signals up to 5 volts and will interface between two points with different interfaces such as PECL, LVTTL, High-Speed CMOS, LSTTL, and TTL. The device is suitable for PCN, USB communication interface and IP telephone systems. Other potential applications include power management, battery management, bridge-addressing and current load monitoring as well as data loggers, converters, and other portable instrumentation.

Working Principles

The DG408CY+ is a single-channel non-inverting MUX / DEMUX. It has two logic control inputs, A and B, that control the state of the MUX / DEMUX allowing it to select either one of the two analog input signals. The device also contains a level shifting circuit which allows the two analog input signals to be different levels. This can be used to interface between two different logic interfaces or to protect signals from ESD and latch-up risks.

The MUX can determine which input to select making it an ideal choice for an analog-switch application. It also has an enable pin which can be used to turn off the switch for reduced power consumption and noise. The purpose of the DEMUX is to output the selected input to various destinations depending on the logic control inputs.

DG408CY+ is a high-speed, low-power, low-voltage CMOS analog MUX and DEMUX. Its key features include low ON resistance, minimal propagation delay, noise immunity, low power consumption, and voltage and current limiting protection. The device is constructed out of advanced CMOS logic and MOSFETs which enable it to convert logic level signals into analog signals as well as condition and switch sensitive analog signals.

Conclusion

A simple and cost effective way to control analog signals between two points in a circuit is through the use of DG408CY+ analog switches, multiplexers and demultiplexers. It has high performance, low power consumption, superior logic control inputs and level shifting capabilities. The device is suitable for applications where full-scale ranges down to 1.2V must be accommodated and is ideal for PCN, USB communication interface, IP telephone systems, power management, bridge-addressing and data loggers, converters and other portable instrumentation.