Analog Devices Inc./Maxim Integrated DG409EUE+

Overview

DG409EUE+ from Maxim Integrated is a dual 4-channel CMOS analog multiplexer/demultiplexer designed for precision signal routing in mixed-signal systems. It features guaranteed on-resistance matching ≤8Ω, flatness ≤9Ω, low charge injection ≤15pC, and operates from ±5V to ±20V dual supplies or +5V to +30V single supply. Its rail-to-rail signal handling and TTL/CMOS-compatible digital inputs make it suitable for data-acquisition front-ends and test instrumentation.

For engineers reviewing the DG409EUE+ datasheet, DG409EUE+ pinout, DG409EUE+ application, or DG409EUE+ equivalent, key selection criteria include channel matching tolerance, charge injection impact on sample-and-hold accuracy, off-isolation (>75dB), leakage current (<5nA at +85°C), and TSSOP-16 package compatibility with high-density PCB layouts.

Technical Context

The DG409EUE+ implements a dual independent 4:1 analog switch architecture with CMOS decoder logic controlling two separate banks (S1A–S4A/DA and S1B–S4B/DB). Each channel conducts bidirectionally with matched rDS(ON) across temperature and supply voltage variations.

Its enable (EN) input provides break-before-make switching with tOPEN up to 175ns, while transition time (tTRANS) remains ≤450ns under ±15V dual-supply conditions. Input logic thresholds (VAL ≤0.8V, VAH ≥2.4V) ensure robust interfacing with standard digital controllers without level-shifting.

Key Specifications

Pinout & Package

Package: 16-pin TSSOP (U16-1), 4.4mm × 5.0mm body, 0.65mm pitch, exposed pad optional.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 4-channel analog multiplexer applications.

Compared with ADG409BRUZ and TS5A23157DGSR, the DG409EUE+ uniquely delivers guaranteed 8Ω channel matching and 9Ω flatness within its ±20V operating range-critical for precision multi-channel data acquisition where gain consistency and linearity across signal amplitude are non-negotiable.

Availability

DG409EUE+ is available at Aetrix Electronics and suitable for test equipment, guidance and control systems, and data-acquisition systems requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for DG409EUE+ 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 applications.

The DG409EUE+ belongs to Maxim's legacy high-voltage CMOS analog switch family, engineered specifically for precision signal routing in environments demanding low leakage, tight channel matching, and robust ESD tolerance-key requirements in automated test and aerospace systems.

FAQ

What is the maximum supply voltage rating for DG409EUE+ in dual-supply operation?

The DG409EUE+ supports dual-supply operation from ±5V to ±20V. Absolute maximum ratings specify V+ up to +44V referenced to V−, but functional operation is guaranteed only within the ±5V to ±20V range. Exceeding ±20V may degrade on-resistance matching and increase leakage beyond datasheet limits, so DG409EUE+ should not be operated beyond ±20V in production designs.

Does DG409EUE+ support single-supply operation, and how is V− configured?

Yes, DG409EUE+ supports single-supply operation from +5V to +30V. In this mode, the V− pin must be connected to circuit ground (GND), not left floating. The analog signal range becomes 0V to V+, e.g., 0V to +12V when V+ = +12V. This configuration preserves all key specs including 100Ω max rDS(ON) and 15pC max charge injection, making DG409EUE+ viable for portable data loggers and single-rail industrial sensors.

What is the significance of the 'E' grade in DG409EUE+?

The 'E' in DG409EUE+ denotes the extended temperature range of −40°C to +85°C, validated per Maxim's industrial qualification standards. This contrasts with the 'C' grade (0°C to +70°C). The 'E' grade ensures guaranteed performance-including 5nA max off-leakage at +85°C and 8Ω max channel matching-across the full industrial temperature span, making DG409EUE+ suitable for under-hood automotive subsystems and outdoor telecom equipment where thermal stability is critical.

How does the break-before-make timing of DG409EUE+ prevent signal corruption?

DG409EUE+ guarantees a break-before-make interval (tOPEN) of up to 175ns, ensuring that one channel fully disconnects before another connects. This prevents momentary short-circuits between analog sources-such as conflicting voltage references or current-output sensors-which could otherwise cause transient errors, latch-up, or damage. In DG409EUE+, this behavior is inherent to its CMOS decoder architecture and requires no external timing control, simplifying system-level design for fault-tolerant multiplexing.

Can DG409EUE+ be used as a direct replacement for the original DG409 series?

Yes, DG409EUE+ is explicitly designed as a pin-compatible plug-in upgrade for industry-standard DG409 devices. It retains identical pinout, logic interface, and supply configurations while improving key parameters: guaranteed 8Ω channel matching (vs. unspecified in legacy DG409), 15pC max charge injection (vs. 25pC typical), and enhanced ESD protection (>2000V vs. unspecified). No PCB or firmware changes are required to migrate from legacy DG409 to DG409EUE+, delivering immediate performance uplift in existing designs.