DG202BDY-E3

Introduction

DG202BDY-E3, produced by Analog Devices, Inc. (ADI), is a SPST (single-pole single-throw) analog switch designed for use in high bandwidth applications such as those found in video, communications and RF (radio frequency) systems. It is ideal for switching large capacitive loads while providing on resistance of 0.3-ohm typical and low insertion loss. The DG202 is an ideal switch used by many different applications including commercial and industrial applications, audio systems, power supplies, as well as for sampling-delay switching.

Application Field

Commercial and Industrial Applications: Many commercial and industrial applications use the DG202BDY-E3 analog switch for switching between voltage sources. It can be used to control the current flow from a voltage source to the load. It is ideal for use in applications such as power supplies, AC power relays, motor controls, ECG and EEG monitoring, medical instrumentation, and test equipment.

Audio Systems: The DG202BDY-E3 is also commonly used in audio systems as a low cost method to switch between audio signals and use attenuators or other level control functions. It is an ideal choice for consumer audio and pro-audio applications, including analog to digital converters and audio digital signal processors.

Sampling-delay Switching: The DG202BDY-E3 can also be used for sampling-delay switching. This type of switching is widely used in telecommunications applications such as remote telemetry equipment, in radar systems, and in data acquisition and control systems. The DG202BDY-E3 provides a fast sample/hold function for accurate and reliable data acquisition, and is suitable for wideband applications.

Working Principle

The DG202BDY-E3 switch is a single-pole single-throw analog switch that operates at a low voltage of 1.8V and is rated for a current of 0.5Amps. When turned on it switches the input signal to the output. It is an ideal device for switching capacitive loads and is capable of handling large amounts of current, while providing on resistance of 0.3-ohm typical and low insertion loss. The device has an impedance of 30 ohms typically when switched off and 25 ohms when the switch is on, making it ideal for a wide variety of low voltage applications.

The DG202BDY-E3 analog switch offers fast switching times with low power consumption. The device provides a low power operation with a quiescent current of less than 2nA. This makes it an ideal choice for portable applications such as audio switching, telecom switching and electrocardiogram monitoring equipment. Its flexibility allows it to be used in either single-pole double-throw (SPDT) or single-pole single-throw (SPST) configurations.

The DG202BDY-E3 analog switch is an ideal choice for high performance applications. It offers low insertion loss and low parasitics. This allows for reliable signal integrity in demanding applications. The device is also suitable for operating in temperature range of –40°C to +85°C.

Conclusion

The DG202BDY-E3 analog switch is perfect for wide variety of high-bandwidth applications such as those found in video, communications and RF systems. The on-resistance of 0.3-ohm typical and low insertion loss make it ideal for switching capacitive loads up to 0.5A. It is fast switching times with low power consumption, a wide temperature range, and the capability to be used in either single-pole single-throw or single-pole double-throw configurations make it the ideal choice for many applications requiring high performance.