Analog Devices Inc./Maxim Integrated DG508ADY+

Overview

DG508ADY+ from Maxim Integrated is a monolithic CMOS 8-channel single-ended analog multiplexer with ±4.5V to ±18V dual-supply operation, break-before-make switching, and 16-pin narrow SOIC package. It features 400Ω typical on-resistance at ±15V, <0.5nA off-leakage at 25°C, and 1.0μs maximum switch transition time - enabling precision signal routing in data-acquisition systems requiring high channel isolation and rail-to-rail analog swing.

For engineers reviewing the DG508ADY+ datasheet, DG508ADY+ pinout, DG508ADY+ application, or DG508ADY+ equivalent, key selection criteria include guaranteed latchup immunity with powered-off supplies, TTL/CMOS-compatible logic inputs, symmetrical bidirectional analog conduction, and -40°C to +85°C industrial temperature rating - all critical for robust control-system and aircraft HUD signal-switching designs.

Technical Context

The DG508ADY+ implements a fully decoded 3-bit address (A0–A2) controlling one of eight bidirectional analog channels (S1–S8) to a common drain (D), with independent enable (EN) gating. Its CMOS transmission-gate architecture ensures matched on-resistance across channels and rail-to-rail analog signal handling within supply rails.

Break-before-make timing is guaranteed at ≤0.2μs, preventing momentary short-circuits during channel transitions. The device operates with true analog symmetry: no distinction between source and drain terminals, supporting equal performance in mux or demux configurations without signal polarity constraints.

Key Specifications

Pinout & Package

Package: 16-pin narrow SOIC (S16-5), RoHS-compliant, surface-mountable with 1.27mm pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog multiplexer applications.

Compared with MAX338ESE+ and ADG508AKRZ-REEL7, the DG508ADY+ uniquely combines industrial temperature range (-40°C to +85°C), ultra-low leakage (<0.5nA), and guaranteed break-before-make timing - making it the preferred choice for high-reliability, multi-rail analog routing where signal integrity and fail-safe switching are non-negotiable.

Availability

DG508ADY+ is available at Aetrix Electronics and suitable for industrial data acquisition, aircraft heads-up displays, and automated test equipment requiring stable component supply across extended temperature ranges and dual-supply analog architectures.

Supply support for DG508ADY+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power-management ICs for industrial, automotive, and communications applications.

The DG508ADY+ belongs to Maxim's legacy analog multiplexer product line, engineered specifically for high-isolation, rail-to-rail signal routing in harsh-environment control and measurement systems.

FAQ

What is the maximum supply voltage range supported by the DG508ADY+?

The DG508ADY+ operates continuously from ±4.5V to ±18V. This dual-supply range allows direct compatibility with standard ±5V, ±12V, and ±15V industrial power rails. Operation outside this range risks permanent damage, as absolute maximum ratings cap V+ at +44V referenced to V− and GND at +25V referenced to V−.

Does the DG508ADY+ support bidirectional analog signal flow?

Yes, the DG508ADY+ supports fully symmetrical bidirectional operation: any analog channel (S1–S8) and the common terminal (D) can serve as input or output without performance degradation. On-resistance, leakage, and capacitance specifications apply identically in both directions, enabling flexible mux or demux use cases.

What is the guaranteed break-before-make interval for the DG508ADY+?

The DG508ADY+ guarantees a break-before-make interval of ≤0.2μs, measured under standard test conditions (Figure 3). This ensures no overlap between consecutive channel connections, eliminating transient shorts that could corrupt sensitive analog measurements or damage downstream circuitry.

How does the DG508ADY+ prevent latchup when power is removed?

The DG508ADY+ uses latchup-proof CMOS construction that isolates internal circuitry from input signals during power-down. Even with analog inputs active at ±15V while V+ and V− are at 0V, the device remains immune to destructive latchup - a critical feature for hot-swap or fault-tolerant system designs.

Is the DG508ADY+ pin-compatible with older DG508A variants?

Yes, the DG508ADY+ is a direct plug-in upgrade for industry-standard DG508A devices in 16-pin narrow SOIC packages. It retains identical pinout, logic interface, and analog terminal assignments - allowing drop-in replacement without PCB modification while delivering faster enable switching and lower leakage.