DG508AAK

Overview

The DG508AAK is a monolithic CMOS analog multiplexer featuring an 8-channel (1-of-8) configuration housed in a 16-pin CERDIP package. It operates from dual power supplies ranging from ±4.5V to ±18V and supports single supply operation from 4.5V to 18V. The device guarantees break-before-make switching and latchup-proof construction. Key electrical parameters include a maximum on-resistance of 400Ω at +25°C, rising to 550Ω across the full temperature range. Switching times are specified with a transition time of up to 1µs, enable turn-on time up to 1µs, and enable turn-off time up to 700ns. Leakage currents are typically low, with source off-leakage at 5pA and drain off-leakage at 25pF capacitance under standard conditions.

Feature Summary

• Monolithic CMOS design ensuring symmetrical, bidirectional signal conduction
• Guaranteed break-before-make switching prevents signal shorting during channel transitions
• Latchup-proof construction allows continuous operation even if power supplies are removed while signals are present
• Logic inputs are compatible with both TTL and CMOS standards

Applications

• Data acquisition systems
• Signal routing networks
• Control systems
• Data logging systems
• Aircraft heads-up displays

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to potential second-source variations. Confirm the specific ordering suffix matches the required temperature grade and package type. Check for RoHS compliance status as the CERDIP package may have different environmental certifications compared to plastic variants. Ensure supply chain stability as this part number may be subject to discontinuation or limited availability.

Selection Notes

Select the DG508AAK when extended industrial temperature ranges (-55°C to +125°C) are required alongside ceramic packaging durability. Compare on-resistance specifications against system voltage drops to ensure signal integrity. Verify that the logic input levels align with the controlling microcontroller or FPGA outputs. Consider the physical size constraints of the 16-pin CERDIP footprint during PCB layout planning.

Part Context

The DG508AAK belongs to the DG508A/DG509A family of monolithic CMOS analog multiplexers manufactured by Maxim Integrated, now part of Analog Devices Inc. This series serves as a high-reliability upgrade to earlier industry-standard devices, offering improved switching speeds and lower power consumption. The AA suffix specifically denotes the -55°C to +125°C operating temperature range within the 16-pin CERDIP package format.

Replacement Considerations

Publicly confirmed substitute part numbers include MPC508AP from Texas Instruments.