Analog Devices Inc./Maxim Integrated DG508ACWE+

Overview

DG508ACWE+ 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 170Ω typical on-resistance at ±15V. It features TTL/CMOS-compatible logic inputs, 0.6μs typical switch transition time, and <0.5nA typical off-leakage current at +25°C - used in precision data-acquisition systems for channel selection between sensors and ADCs.

For engineers reviewing the DG508ACWE+ datasheet, DG508ACWE+ pinout, DG508ACWE+ application, or DG508ACWE+ equivalent, key selection criteria include guaranteed break-before-make timing, latchup-proof construction under powered-off signal conditions, low standby supply current (0.02mA), and wide-temperature-rated Wide SO-16 packaging suitable for industrial control and aircraft HUD signal routing.

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 analog conduction and rail-to-rail signal handling within the ±15V analog range.

It operates across ±4.5V to ±18V supplies without latchup, even when input signals remain present during power-down. The device guarantees 0.2μs minimum break-before-make interval and supports TTL- and CMOS-level logic thresholds (0.8V/2.4V) on all digital inputs.

Key Specifications

Pinout & Package

Package: 16-pin Wide SO (W16-2), RoHS-compliant, surface-mount, 7.6mm × 10.3mm body, 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 DG508ACWE+ delivers the lowest off-leakage and fastest switching in ±15V systems, while maintaining pin-compatible layout with industry-standard 16-pin Wide SO packages - making it optimal for upgrade paths from legacy DG508A designs.

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 manufacturability, and RoHS-compliant surface-mount 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, automotive, and communications applications.

The DG508ACWE+ belongs to Maxim's legacy analog multiplexer product line, engineered for high-voltage, latchup-immune signal routing in mission-critical data acquisition 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 with ±15V supplies. Its absolute maximum ratings allow V+ up to +44V and V− down to −44V referenced to V−, but functional analog swing is limited to the supply rails. For ±15V operation - the standard condition in its electrical characteristics table - the DG508ACWE+ passes signals from −15V to +15V without distortion or clipping, making it suitable for industrial sensor interfaces and test equipment.

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

No, the DG508ACWE+ does not require external pull-up or pull-down resistors on A0, A1, A2, or EN. Its logic inputs are fully CMOS- and TTL-compatible, with specified input current limits of ±30μA over temperature and guaranteed thresholds of 0.8V (low) and 2.4V (high). Internal input structures provide adequate noise immunity and DC termination; external resistors would unnecessarily load the driving source and are omitted in all Maxim-recommended operating circuits for the DG508ACWE+.

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

Yes, the DG508ACWE+ can operate with asymmetric supplies, provided both V+ ≥ +4.5V and |V−| ≥ 4.5V, and the total differential supply (V+ − V−) does not exceed 36V. However, analog signal range becomes constrained by the lesser of (V+ − 0.5V) and (0 − V− − 0.5V), and on-resistance increases as supply magnitude decreases. For example, with +12V/−5V, usable analog swing is approximately −4.5V to +11.5V, and RDS(ON) degrades versus ±15V specs. Full performance is guaranteed only within symmetric ±4.5V to ±18V ranges.

Is the DG508ACWE+ pin-compatible with the original DG508A in Wide SO-16 packaging?

Yes, the DG508ACWE+ is a direct plug-in upgrade for the industry-standard DG508A in Wide SO-16 packaging. Pin assignments, footprint, and functional behavior match identically - including A0–A2, EN, V+, V−, GND, D, and S1–S8. The DG508ACWE+ improves upon the legacy part with faster enable switching times (0.4μs vs. 1.0μs typ), lower leakage (<0.5nA vs. 2nA), and reduced power consumption, while maintaining full backward compatibility in existing PCB layouts.

What is the thermal performance of the DG508ACWE+ in continuous operation?

The DG508ACWE+ has a maximum continuous power dissipation of 762mW at +70°C ambient, with a derating factor of 9.52mW/°C above that temperature. Its Wide SO-16 package (W16-2) exhibits a junction-to-ambient thermal resistance (θJA) of approximately 131°C/W. Under typical ±15V operation with all switches off, supply current is ≤0.2mA, resulting in <3mW static power - well within thermal limits even in sealed enclosures. No heatsinking is required for standard industrial use cases.