Analog Devices Inc./Maxim Integrated DG408CUE+

Overview

DG408CUE+ from Maxim Integrated is a precision 1-of-8 CMOS analog multiplexer/demultiplexer designed for bidirectional signal routing in precision data-acquisition and test systems. It delivers guaranteed 100Ω max on-resistance, 8Ω max channel-to-channel matching, 15pC max charge injection, rail-to-rail analog signal handling (±20V dual / +5V to +30V single supply), and operates over 0°C to +70°C in a 16-pin TSSOP package.

For engineers reviewing the DG408CUE+ datasheet, DG408CUE+ pinout, DG408CUE+ application, or DG408CUE+ equivalent, this device is selected for high-accuracy analog switching where low leakage (<5nA at +85°C), flat on-resistance across signal range, and TTL/CMOS-compatible digital control are critical in sample-and-hold, guidance systems, and audio routing designs.

Technical Context

The DG408CUE+ implements a CMOS transmission-gate architecture with integrated decoder logic, enabling single-ended 8:1 analog signal selection via three address lines (A0–A2) and an active-low enable (EN). Its switch cells are symmetric, supporting true bidirectional conduction without signal polarity constraints.

It features guaranteed performance across dual supplies (±5V to ±20V) and single supplies (+5V to +30V), with ESD protection exceeding 2000V per MIL-STD-883 Method 3015.7. On-resistance flatness (9Ω max) and matching (8Ω max) are specified over the full analog input range, ensuring minimal gain error in precision gain-switching applications.

Key Specifications

Pinout & Package

Package: 16-pin TSSOP (U16-1), 4.4mm × 5.0mm body, 0.65mm pitch, exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DG408CUE+, ADG408BRUZ offers broader temperature range but weaker charge injection and matching specs, while MAX4617ESE+ improves on-resistance but omits guaranteed flatness and channel matching-making DG408CUE+ the preferred choice for metrology-grade multiplexing where parameter consistency is non-negotiable.

Availability

DG408CUE+ is available at Aetrix Electronics and suitable for data-acquisition systems, automated test equipment, and guidance and control systems requiring stable component supply, long-term lifecycle support, and guaranteed parametric performance across temperature.

Supply support for DG408CUE+ 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) is a fabless semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing markets.

The DG408CUE+ belongs to Maxim's precision analog switch product line, engineered specifically for applications demanding guaranteed matching, low charge injection, and rail-to-rail operation in harsh or metrology-critical environments.

FAQ

What supply voltage ranges does the DG408CUE+ support?

The DG408CUE+ operates with ±5V to ±20V dual supplies or +5V to +30V single supply. When using single supply, V− must be connected to GND. The device maintains guaranteed specifications-including 100Ω max on-resistance and 15pC max charge injection-across these full ranges, as validated in Maxim's official electrical characteristics tables for both dual and single supply conditions.

Is DG408CUE+ pin-compatible with the original DG408?

Yes, DG408CUE+ is explicitly documented as a pin-compatible plug-in upgrade for the industry-standard DG408. Its 16-pin TSSOP footprint matches the DG408CUE variant, and all pin functions-including A0/A1/A2 address inputs, EN enable, S1–S8 analog terminals, D common I/O, V+, V−, and GND-are electrically and physically identical per Maxim's datasheet pin configuration diagrams and ordering information table.

What is the maximum allowable analog signal voltage for DG408CUE+?

The DG408CUE+ supports analog signals from V− to V+, with absolute maximum ratings of −0.3V to +44V referenced to V−. For standard operation, the analog signal range is guaranteed to span ±20V under dual-supply conditions (V+ = +20V, V− = −20V) and up to +30V under single-supply conditions (V+ = +30V, V− = GND), as confirmed in the "Analog Signal Range" specification row of the datasheet's Electrical Characteristics tables.

How does DG408CUE+ handle charge injection in sample-and-hold applications?

DG408CUE+ guarantees ≤15pC maximum charge injection, directly limiting the voltage step introduced at the hold capacitor when a channel is deselected. This value-measured and tested per Maxim's Figure 5 test circuit-ensures minimal acquisition error in 12-bit+ systems, especially when paired with typical 1nF–10nF hold capacitors, as verified in the device's Typical Operating Characteristics and Applications Information sections.

Does DG408CUE+ require external protection diodes for overvoltage conditions?

No-DG408CUE+ includes internal clamping diodes that protect digital and analog pins against signals exceeding V+ or V−, as stated in Note 1 of the Absolute Maximum Ratings. External blocking diodes are optional and only recommended if strict overvoltage sequencing cannot be guaranteed; their use reduces analog signal range by ~1V but does not alter DG408CUE+'s core switching performance or leakage behavior.