DG418AK/883B

Overview

The DG418AK/883B is a single-channel CMOS analog switch manufactured by Analog Devices Inc. under the Maxim Integrated brand, designed for military and aerospace applications compliant with MIL-STD-883 standards. It utilizes a CDIP-16 package for through-hole mounting and operates within an extended temperature range of -55°C to +125°C. The device supports dual power supplies ranging from ±4.5V to ±20V or a single supply up to 30V. Key electrical specifications include a maximum on-resistance of 75 Ohms, a channel-to-channel matching of 5 Ohms maximum, and a charge injection of 5pC. The component features low leakage current of 2nA maximum at +25°C and offers a propagation delay of 250ns typical.

Feature Summary

• MIL-STD-883 qualified construction suitable for high-reliability environments
• CMOS technology enabling low power consumption and high input impedance
• Single-channel SPST configuration with normally open operation
• Symmetrical switching characteristics ensuring minimal signal distortion

Applications

• Military communication systems requiring ruggedized signal routing
• Aerospace instrumentation for precise analog signal switching
• High-reliability data acquisition systems operating in extreme temperatures
• Test and measurement equipment demanding low leakage and accurate switching

Procurement Notes

Verify the authenticity of the MIL-STD-883 certification markings on the component body. Confirm that the suffix AK/883B corresponds to the specific military grade lot requirements. Request full traceability documentation including material declarations and test reports. Ensure storage conditions comply with moisture sensitivity levels prior to assembly. Validate supplier authorization status for defense-grade components.

Selection Notes

Select this component when a single-channel analog switch with military qualification is required. Compare on-resistance values against system signal integrity requirements. Evaluate package compatibility with existing PCB layouts for CDIP-16 footprints. Consider thermal management capabilities given the wide operating temperature range. Verify voltage headroom against the specified dual or single supply limits.

Part Context

This part belongs to the DG41x series of CMOS analog switches, which are known for their robust performance in harsh environments. The /883B suffix indicates compliance with MIL-STD-883 testing standards. It serves as a specialized variant of the commercial DG418, offering enhanced reliability for defense and space applications. The series typically includes complementary devices like the DG417 and DG419 for different switching configurations.

Replacement Considerations

Direct replacements must maintain MIL-STD-883 qualification and CDIP-16 packaging. Verify pinout compatibility with the original design. Check if alternative parts meet the same on-resistance and leakage current specifications. Ensure the substitute component supports the required voltage ranges and temperature extremes.