DG441CY

Overview

The DG441CY is a quad, single-pole/single-throw (SPST) analog switch manufactured by Analog Devices Inc./Maxim Integrated. It features four normally closed switches within a 16-pin Narrow SO 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 85Ω, an on-resistance match between channels of 4Ω max, and guaranteed on-resistance flatness over the signal range of 9Ω max. Switching times are less than 250ns for turn-on and less than 170ns for turn-off. Charge injection is limited to 10pC max, with off-leakage current below 5nA at +85°C. The operating temperature range is 0°C to +70°C.

Feature Summary

• Improved on-resistance matching between channels ensures consistent signal transmission across all four switches.
• Guaranteed on-resistance flatness over the entire analog signal range maintains signal integrity.
• Low charge injection minimizes transient voltage spikes during switching operations.
• Enhanced off-leakage current performance provides better isolation at elevated temperatures.

Applications

• Sample-and-Hold Circuits
• Communication Systems
• Test Equipment
• Battery-Operated Systems

Procurement Notes

Verify the specific ordering suffix to confirm the package type and lead-free status. The 'CY' designation indicates a 16-pin Narrow SO package with a commercial temperature range. Ensure compatibility with existing PCB footprints and thermal management requirements for surface-mount installation.

Selection Notes

Select this component when a quad SPST configuration with normally closed logic is required. Consider the narrow SO package constraints for board space. Verify that the single or dual supply voltage ranges align with the system design. Check if the commercial temperature range meets the environmental specifications.

Part Context

This part belongs to the DG441/DG442 series of improved analog switches. It is functionally similar to industry-standard predecessors but offers enhanced performance in on-resistance matching and leakage current. The DG441 variant specifically provides normally closed switches, distinguishing it from the normally open DG442.

Replacement Considerations

Direct pin-compatible replacements may exist within the same family, such as the DG442CY for normally open configurations. Verify functional equivalence regarding switch state and electrical characteristics before substitution.

FAQ

What is the logic sense of the DG441 switches?

The DG441 switches are normally closed (NC). A logic low input turns the switch ON (closed), and a logic high input turns it OFF (open).

How does the on-resistance flatness affect performance?

The guaranteed on-resistance flatness of 9Ω max ensures that the resistance variation across the analog signal range is minimized, preserving signal linearity.

Can the DG441CY operate with unbalanced supplies?

Yes, the device can operate with unbalanced supplies, provided the difference between V+ and V- does not exceed the absolute maximum ratings.