DG381ABK

Overview

The DG381ABK is a dual single-pole single-throw (SPST) CMOS analog switch manufactured by Analog Devices Inc./Maxim Integrated. It features normally-closed contacts with a maximum on-state resistance of 50 ohms. The device operates on dual supplies ranging from ±5V to ±18V or a single supply up to 30V. Key electrical parameters include a maximum charge injection of 12pC, off-state leakage current of 5nA, and switching times of 300ns (on) and 250ns (off). It is housed in a 14-pin ceramic dual in-line package (CDIP) and supports an operating temperature range of 0°C to +70°C.

Feature Summary

• Dual SPST configuration with normally-closed logic for signal routing applications
• Low charge injection of 12pC minimizes signal distortion during switching events
• High isolation performance with -74dB crosstalk at 500kHz
• Robust mechanical design utilizing ceramic dual in-line packaging

Applications

• Data acquisition systems requiring reliable signal path management
• Instrumentation equipment needing low-distortion analog signal switching
• Industrial control interfaces for process monitoring circuits
• Test and measurement devices utilizing precision analog front-ends

Procurement Notes

This component is officially classified as obsolete and no longer available through primary manufacturer channels. Verification of availability requires checking authorized distributors for remaining stock or surplus inventory. Buyers must confirm the specific package variant and verify RoHS compliance status, as older production runs may not meet current environmental regulations. Replacement planning should account for potential lead time variability associated with end-of-life components.

Selection Notes

Select this part when a dual SPST normally-closed topology is required for general-purpose analog switching. The 50-ohm on-resistance suits applications where moderate signal attenuation is acceptable. Ensure the system voltage aligns with the ±5V to ±18V dual supply requirement. Consider the 14-pin CDIP package constraints for PCB layout and thermal management. Evaluate if the 300ns switching speed meets the timing requirements of the target application.

Part Context

The DG381ABK belongs to the DG381A series of general-purpose CMOS analog switches. This family provides dual SPST functionality designed for versatile signal routing tasks. The ABK suffix specifically denotes the 14-lead ceramic dual in-line package variant. This series is characterized by its robust construction and suitability for industrial environments requiring reliable analog signal handling.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source documentation. As the product is obsolete, alternative solutions require manual evaluation of pin compatibility, electrical specifications, and package dimensions against current market offerings.