DG445DJ+

Analog Switches, Multiplexers, Demultiplexers Overview

The DG445DJ+ is a quad, single-pole/single-throw (SPST) analog switch manufactured by Analog Devices Inc./Maxim Integrated. It features four normally open switches with a maximum on-resistance of 85 Ohms and an on-resistance match between channels of 4 Ohms maximum. The device operates from a single +10V to +30V supply or bipolar ±4.5V to ±20V supplies. Key electrical parameters include a maximum turn-on time of 250 ns, a maximum turn-off time of 120 ns, and a maximum charge injection of 10 pC. The component supports rail-to-rail signal handling and has a power dissipation rating of 842 mW in the 16-pin Plastic DIP package.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Improved on-resistance matching between channels for consistent signal path performance
• Guaranteed on-resistance flatness over the entire analog signal range
• Low charge injection characteristics suitable for precision sampling applications
• TTL and CMOS logic compatible control inputs

Analog Switches, Multiplexers, Demultiplexers Applications

• Sample-and-hold circuits
• Audio signal routing
• Test equipment
• Communication systems

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the manufacturer designation as Analog Devices Inc./Maxim Integrated when sourcing this component. Confirm that the specific part number includes the '+' suffix to ensure compliance with RoHS directives. Check the datasheet for the correct temperature grade corresponding to the 'D' suffix, which indicates operation within the -40°C to +85°C range. Ensure the 16-pin PDIP package matches the target PCB footprint requirements.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select the DG445DJ+ when a quad SPST configuration with normally open contacts is required. This component is appropriate for designs needing low on-resistance and improved channel matching compared to standard industry equivalents. Consider the bipolar supply capability if negative voltage rails are available in the system architecture. Verify that the 85 Ohm maximum on-resistance meets the signal integrity requirements of the application.

Analog Switches, Multiplexers, Demultiplexers Part Context

The DG445DJ+ belongs to the DG444/DG445 series of improved analog switches. It serves as the normally open variant within this family, while the DG444 provides normally closed switches. Both share identical pinouts and electrical specifications, facilitating direct replacement in existing designs requiring different switch states without altering the board layout.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

The DG445DJ+ is designed as a plug-in upgrade for industry-standard DG444/DG445 devices. Designers replacing older versions should verify that the improved on-resistance flatness and lower leakage currents are compatible with the existing circuit tolerances.