DG421DK

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Analog switches, multiplexers, and demultiplexers are all typically classified as interface components. The DG421DK is a monolithic CMOS double-pole/double-throw (DPDT) analog switch designed for operation in 4.5V to 20V analog and digital systems. This specialized design offers low On-resistance, low channel-to-channel CT Off-state leakage currents,and TTL and CMOS compatible logic controls.

Applications

DG421DK is used in many applications such as multiplexers, audio and data signal routing, programmable gain amplifiers, sensor selectors and automatic test applications. It is also used in portable RF and cellular telephone equipment, mixed signal conditioning and power management for communications.

Working Principle

The DG421DK has two DPDT switches, each with two normally closed switches. The four switches are controlled by two sets of logic inputs. When a logic input is high, the corresponding switches are opened, allowing signals to pass through. When a logic input is low, the corresponding switches are closed, blocking the signals.

The DG421DK has two sets of independent analog control inputs. These inputs control the on/off states of the two DPDT switches, allowing for more precise switching operations. For example, a voltage applied to the analog control inputs can be used to open and close the switch gradually rather than abruptly.

The DG421DK is a monolithic integrated circuit, so its components are all fabricated on a single chip. This construction minimizes the parasitics (the small inductances and capacitances that are inherent when using discrete components) that can degrade system performance. This makes it ideal for high-fidelity audio and video, where any signal degradation must be kept to a minimum.

The DG421DK also offers protection from transient overvoltages. If a voltage greater than 40V is applied to an input or output, the switch will shut off and protect itself from potential damage.

Conclusion

The DG421DK is an analog switch designed for 4.5V to 20V analog and digital systems. Its specialized design offers low On-resistance and TTL and CMOS compatible logic control. The DG421DK is used in many applications such as multiplexers, data signal routing, programmable gain amplifiers, sensor selectors and automatic test applications. The switch is also protected from transient overvoltages that could cause damage.

The specific data is subject to PDF, and the above content is for reference