DG409LDY-E3

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Interface - Analog Switches, Multiplexers, Demultiplexers - DG409LDY-E3 application field and working principle

The DG409LDY-E3 device is an array of quad single-pole/double-throw (SPDT)Analog Switches. This quad switch device allows data or signals originating from one of four sources to be routed to one of four destinations. Each switch conducts equally in both directions when on, and the device operates from a single positive power supply voltage. These switches have low On-resistance, and low Off leakage current.

Features of the DG409LDY-E3:

• Single-pole/double-throw (SPDT) switching
• Low On-resistance (max)
• Low power supply current drain
• ESD protection available on all pins
• Very low power consumption
• Excellent on-state resistance match betweenswitches
• Sub-nanosecond switching
• Low leakage current
• Wide signal bandwidth(DC to 650 MHz)

The DG409LDY-E3 is available in the 16-pin TSSOP package and is suitable for applications including filter networks and signal routing, signal routing between test instruments or digital/analog devices, and audio signal switching. The device can also be used in portable or handheld digital audio equipment, such as digital music players and portable amplifiers.

The DG409LDY-E3 working principle comprises two main sections – the signal source and the switch components. The connection between the signal source and each switch component is digital, and inherently the path from each component to its destination is digital as well. The switch component contains a single pole double throw (SPDT) switch, which is operated in either ‘On’ or ‘Off’ mode by the control inputs.

In \'Off\' mode, the switch is fully open, blocking any signal transmission between the signal’s source and destination. The device is designed to ensure that no signal leakage occurs when in its \'Off\' state.

In ‘On’ mode, the SPDT switch closes, connecting the signal source to its destination. When the switch is opened, it immediately stops any further transmission of the signal. The device is designed to have low On-resistance, and low Off-resistance, ensuring minimal signal distortion and low power consumption. The low leakage current of the switch prevents any voltage drops between the source and the destination.

The DG409LDY-E3 utilizes a CMOS process, allowing for direct interfacing to logic and effectively isolating the analog from the digital world. This CMOS technology allows the device to achieve low onset resistance, a low power on-state resistance, and low current off-state leakage.

The DG409LDY-E3 is suitable for applications where fast and efficient signal routing is desired. This device is capable of switching in sub-nanosecond switching times, is incredibly low power compared to other switch technologies, and offers low signal distortion and low power consumption. The device’s ESD protection on all pins makes it suitable for portable and handheld applications, as it can withstand electrostatic discharges without damaging its components.

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