Analog Devices Inc./Maxim Integrated DG508ACWE

Overview

DG508ACWE from Maxim Integrated is a monolithic CMOS 8-channel analog multiplexer (1-of-8) with break-before-make switching, ±4.5V to ±18V dual-supply operation, 400Ω typical on-resistance at ±15V, <1nA off-leakage at 25°C, and 16-pin wide SOIC package rated for 0°C to +70°C. It routes analog signals in data-acquisition systems requiring rail-to-rail signal handling and low-power portable instrumentation.

For engineers reviewing the DG508ACWE datasheet, DG508ACWE pinout, DG508ACWE application, or DG508ACWE equivalent, key selection criteria include guaranteed latchup immunity with powered-off supplies, TTL/CMOS-compatible logic inputs, symmetrical bidirectional analog paths, and low standby current (0.2mA max) across industrial temperature ranges.

Technical Context

The DG508ACWE implements a fully decoded 3-bit address (A0–A2) to select one of eight bidirectional analog channels (S1–S8) to a common drain (D), with independent enable (EN) control. Its CMOS architecture ensures symmetrical conduction and zero static power draw in the off state.

Break-before-make timing is guaranteed at ≤0.2μs, preventing momentary shorting during channel transitions. The device maintains functional integrity when input signals remain present while V+ or V− supplies are removed - a critical feature for hot-swap and fault-tolerant analog routing.

Key Specifications

Pinout & Package

Package: 16-pin Wide SOIC (W16-2), RoHS-compliant, surface-mountable with standard 1.27mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX338CPA+ and ADG508AKRZ, the DG508ACWE delivers superior leakage performance and true dual-supply rail-to-rail operation - making it optimal for precision DC-coupled measurements where signal integrity and power-off robustness are non-negotiable.

Availability

DG508ACWE is available at Aetrix Electronics and suitable for control systems, data-acquisition systems, and aircraft heads-up displays requiring stable component supply, long-term lifecycle support, and RoHS-compliant wide-SO packaging.

Supply support for DG508ACWE 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, medical, and communications applications.

The DG508ACWE belongs to Maxim's legacy analog multiplexer product line, engineered specifically for high-fidelity, latchup-immune signal routing in dual-supply instrumentation and control environments.

FAQ

What is the maximum analog signal voltage range supported by the DG508ACWE?

The DG508ACWE supports an analog signal range of ±15V when operated at ±15V supplies. Its absolute maximum ratings allow V+ up to +44V referenced to V−, but the guaranteed linear operating range remains ±15V per the electrical specifications. This makes the DG508ACWE suitable for full-rail analog signals in industrial data-acquisition systems without external clamping or attenuation circuits.

Does the DG508ACWE require external pull-up resistors on its address or enable pins?

No, the DG508ACWE does not require external pull-up resistors. Its logic inputs (A0–A2 and EN) are TTL/CMOS compatible with guaranteed thresholds of 0.8V (low) and 2.4V (high), and input currents remain below ±10μA across temperature. Internal design ensures stable logic recognition without external biasing - simplifying interface design with microcontrollers and CPLDs in the DG508ACWE-based systems.

Can the DG508ACWE operate with asymmetric supply voltages such as +12V and −5V?

Yes, the DG508ACWE can operate with asymmetric supplies within its total supply range constraint: V+ − V− must be ≤36V, and each supply must stay within ±4.5V to ±18V limits. For example, +12V and −5V yields 17V differential - well within spec. However, analog signal range becomes limited to V− to V+, so the usable swing would be −5V to +12V. Performance parameters like RDS(ON) may shift slightly versus symmetric ±15V conditions, as noted in the datasheet.

Is the DG508ACWE pin-compatible with the original DG508A from other manufacturers?

Yes, the DG508ACWE is a plug-in upgrade for the industry-standard DG508A. It shares identical pinout, truth table, and functional behavior, while delivering faster enable switching (0.4μs vs. 1.0μs), lower leakage (sub-nA vs. tens of nA), and reduced power consumption. No PCB layout changes are needed when replacing legacy DG508A parts with DG508ACWE in existing designs.

What is the thermal performance of the DG508ACWE in wide SOIC package at full load?

In the 16-pin wide SOIC package, the DG508ACWE has a thermal resistance of 9.52mW/°C above +70°C, yielding a maximum continuous power dissipation of 762mW at TA = +70°C. Under worst-case conditions - all channels conducting 20mA at 400Ω - total power dissipation remains under 160mW, ensuring junction temperature stays well within safe limits even in sealed enclosures without forced airflow. This thermal margin supports reliable operation in compact industrial modules.