DG418DY+

Analog Switches, Multiplexers, Demultiplexers Overview

The DG418DY+ is a precision, monolithic CMOS analog switch manufactured by Analog Devices Inc./Maxim Integrated. It features a single-pole/single-throw (SPST) normally-open configuration housed in an 8-pin SOIC package. The device operates from a single +10V to +30V supply or bipolar ±4.5V to ±20V supplies. Key electrical parameters include a maximum on-resistance of 35Ω, guaranteed on-resistance matching of 3Ω, and on-resistance flatness of 4Ω. Switching times are less than 175ns for turn-on and 145ns for turn-off. It offers low charge injection of 10pC max, off-leakage current under 5nA at +85°C, and rail-to-rail signal handling capabilities.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Guaranteed on-resistance matching between channels and flatness over the signal range
• Low power consumption with extremely low off-leakage current across temperature ranges
• High electrostatic discharge tolerance per Method 3015.7
• TTL/CMOS logic compatible operation

Analog Switches, Multiplexers, Demultiplexers Applications

• Sample-and-Hold Circuits
• Communications Systems
• Test Equipment
• Battery-Operated Systems
• Audio Signal Routing

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the specific suffix 'DY+' against the manufacturer's official documentation to confirm the exact package type, temperature range, and lead-free status. Ensure compatibility with existing PCB footprints and thermal management requirements before finalizing procurement decisions.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component when a normally-open SPST switch is required with tight on-resistance matching specifications. Consider the bipolar supply voltage range and ensure the logic input levels align with the system's TTL or CMOS standards. Evaluate thermal dissipation needs based on the SOIC package derating curves.

Analog Switches, Multiplexers, Demultiplexers Part Context

The DG418DY+ belongs to the redesigned DG417/DG418/DG419 series of precision CMOS analog switches. This family improves upon industry-standard predecessors by offering guaranteed channel matching and flatness. The DG418 specifically provides the normally-open variant within this enhanced performance group.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

DG418DJ

Analog Switches, Multiplexers, Demultiplexers FAQ

What is the default state of the DG418 switch?

The DG418 is a normally-open (NO) switch, meaning the connection between the source and drain is open when the logic input is low.

How does the DG418 handle overvoltage conditions?

Signals on the Source (S) or Drain (D) pins exceeding V+ or V- are clamped by internal diodes. External blocking diodes can be added for additional protection if power-supply sequencing cannot be guaranteed.

Is the on-resistance flatness guaranteed?

Yes, the DG418 guarantees an on-resistance flatness (RFLAT(ON)) of 4Ω maximum over the specified analog signal range.