DG418BDJ

Overview

The DG418BDJ is a precision monolithic quad SPST CMOS analog switch manufactured by Vishay Siliconix. It operates within a ±15 V analog signal range and features an on-resistance of 15 Ω typical, with a maximum of 25 Ω at room temperature. The device supports dual supplies from ±5 V to ±20 V or single supplies up to 36 V. Key dynamic characteristics include a turn-on time of 89 ns maximum and a turn-off time of 80 ns maximum under standard test conditions. It offers low leakage currents, typically 0.25 nA off-leakage, and consumes minimal supply current, generally below 1 µA. The component is housed in an 8-pin Plastic MiniDIP package and functions across a temperature range of -40 °C to +85 °C.

Feature Summary

• High-voltage silicon gate process ensures superior switching performance and prevents latchup via an epitaxial layer.
• TTL and CMOS compatible logic control simplifies interfacing with digital systems.
• Low power consumption and small physical size make it suitable for portable and battery-powered applications.
• Symmetrical analog signal conduction allows equal performance in both directions when the switch is on.

Applications

• Precision test equipment
• Battery powered systems
• Sample-and-hold circuits
• Military radios
• Guidance and control systems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's documentation to confirm package type and compliance status. The base part number DG418BDJ corresponds to the 8-pin Plastic MiniDIP variant. Confirm RoHS directive compliance requirements if applicable to the design. Check for any product change notifications that may affect pinout or electrical specifications before finalizing procurement.

Selection Notes

Select this component for applications requiring high voltage handling and low distortion in analog signal paths. Ensure the control logic levels match the TTL/CMOS compatibility requirements. Verify that the thermal dissipation limits are respected within the operating temperature range. Consider the package constraints if board space is limited, as alternative surface mount options exist within the same family.

Part Context

The DG418BDJ belongs to the DG417B/DG418B/DG419B series of precision monolithic quad SPST CMOS analog switches. This series is designed for high-performance switching of analog signals, combining low power, low leakages, and high speed. The DG418B specifically responds to opposite control logic levels compared to the DG417B, offering flexibility in system design.

Replacement Considerations

DG417BDJ: Similar quad SPST switch but with inverted logic control relative to the DG418B.

FAQ

How does the logic control of the DG418B differ from the DG417B?

The DG418B responds to opposite control logic levels compared to the DG417B. For the DG418B, a Logic '0' turns the switch OFF, while a Logic '1' turns it ON.

What is the maximum analog signal range supported by the DG418BDJ?

The DG418BDJ supports an analog signal range of ±15 V when operated with ±15 V supplies.

Does the DG418B guarantee break-before-make switching?

No, break-before-make switching is guaranteed only for the DG419B variant. The DG418B is an SPST configuration without this specific timing guarantee.