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Interface - Analog Switches, Multiplexers, Demultiplexers

The DG221BDY is a dual channel, low-power CMOS single pole/double throw analog switch. An advanced CMOS process is used to provide economy and low power dissipation while providing high performance analog switching. The DG221BDY offers very low on resistance and low leakage current.

Application Field

The DG221BDY can be used in a variety of applications, particularly those applications where low power, low leakage current and a low on resistance are desired.

• Video switching
• Automatic test equipment
• Data acquisition instruments
• Switched attenuators
• Process control
• Analog multiplexers
• Data acquisition
• Portable audio
• Peripheral switching
• Remote terminal applications
• Cellular products

Working Principle

The DG221BDY is designed to have low noise, low on resistance and single-throw/double-throw switching characteristics. It is typically used to select between two discrete signal sources. The device operates on +/-2.5 to +5V supplies. It features low power consumption and a wide operating temperature range of -40 to +85 degrees Celsius.

The DG221BDY can be used as a single pole/double throw analog switch, or as a differential signal path switch. It is capable of switching a differential signal at a gain of 20V/V, and features a immunity to clock feed-through at all switch speeds. The maximum total current it can handle is 200mA, and the current rating per switch is 25mA.

The DG221BDY offers an option of logic level control with rails as low as 1V. It also features a low glitch of 0.3nV.s on the low power option, and a low leakage current of 10nA which makes it suitable for high speed, low voltage circuitry.

The DG221BDY is ideal for high performance applications requiring low on-resistance and low leakage current, such as video. With its low power, wide temperature range and low voltage options, it is also suitable for portable and battery-powered applications.

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