DG211CY+

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The DG211CY+ is an analog switch IC with an onboard buffer amplifier. It is categorised under the interface category and is used as a switch, multiplexer, or demultiplexer IC. This IC was designed by Analog Devices, Inc. (ADI) for general purpose applications. The DG211CY+ comes in the industry standard 8-Lead SOIC package and its applications include analog signal routing, circuit protection and data acquisition.

Application Field

In terms of its application field, the DG211CY+ can be used in data acquisition, analog signal routing, and circuit protection applications. It can also be used in communication systems for switching between antenna paths, antenna amplifiers, and receivers. In addition, the DG211CY+ can also be employed in industrial controllers, instrumentation systems, and test equipment.

Working Principle

The DG211CY+ operates on an analog switching principle. It features two wide voltage input range operation, a single supply voltage of 5.0V, and can handle up to +/- 3.0V peak signals from -55°C to +125°C. It has two independent bilateral switching sections with opposite control logic, CMOS compatible enable pins, and low control voltages. Thanks to its high on-state resistance, this device has significantly lower power dissipation compared to other switching ICs.

Each of the two switching sections includes its own enable pin, which allows a single enable signal to control multiple multiplexer/demultiplexer switches. The enable pins are logically active low (low-true logic) and they can be used to connect each switch section together. When enabled, the switches are activated and current can flow through them; otherwise, they are disabled and no current can flow through them. The control logic of the DG211CY+ is further increased by its Schmitt trigger action, which enables the device to respond to input signals with any amplitude.

The DG211CY+ also has two buffers with a unity gain of 1x, one for each of the switches. The buffers provide excellent common-mode rejection ration, enabling the DG211CY+ to effectively eliminate noise and interference from external sources. The buffers also provide additional insulation for the output and reduce the effect of external conditions such as temperature fluctuations and supply voltage variations.

Overall, the DG211CY+ is a high-performance switch IC that can be used in various interface applications. With its wide voltage input range, low control voltages, CMOS-compatible enable pins, and Schmitt trigger action, it is an ideal choice for data acquisition, analog signal routing, and circuit protection.

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