Analog Devices Inc./Maxim Integrated MAX4591EUE

Overview

The MAX4591EUE from Maxim Integrated is a high-speed, precision quad SPST analog switch with four normally closed (NC) channels, designed for +12V or +15V single-supply operation. It delivers 16Ω max on-resistance, ≤80ns turn-on time, ≤45ns turn-off time, 5pC max charge injection, and 100pA max off-leakage - enabling low-distortion signal routing in test equipment and precision sample-and-hold circuits.

For engineers reviewing the MAX4591EUE datasheet, MAX4591EUE pinout, MAX4591EUE application, or MAX4591EUE equivalent, key selection criteria include guaranteed 1Ω max channel-to-channel R_ON match, 1.75Ω max R_ON flatness over signal range, ESD >2000V per Method 3015.7, and pin compatibility with DG611/DG211 families for drop-in replacement in legacy designs.

Technical Context

The MAX4591EUE implements CMOS-based SPST switching architecture with logic-controlled NC topology: each of four independent switches connects COM to NC when IN = 0V, and opens when IN ≥5V. Its internal charge-pump-free design ensures stable R_ON across ±10mA load currents and supports analog signal ranges from V− to V+ (0V to +15V).

Guaranteed performance includes 1.75Ω max R_ON flatness over 0–10V input swing and 5pC max charge injection - critical for minimizing pedestal error in sampling systems. The device operates across −40°C to +85°C and maintains <5nA max COM on-leakage at +85°C, supporting military-grade guidance and control applications.

Key Specifications

Pinout & Package

MAX4591EUE is housed in a 16-pin TSSOP package (4.4mm × 5.0mm, 0.65mm pitch), optimized for space-constrained PCB layouts while maintaining thermal performance up to +85°C ambient.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4591EUE, MAX4591ESE offers identical functionality in a larger SO package for easier handling and thermal margin, while DG611DN trades precision and speed for lower cost - making MAX4591EUE the optimal choice for applications demanding guaranteed matching, low charge injection, and sub-100ns timing.

Availability

MAX4591EUE is available at Aetrix Electronics and suitable for test equipment, sample-and-hold circuits, and military guidance systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX4591EUE 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 and mixed-signal ICs for industrial, communications, and automotive markets.

The MAX4591EUE belongs to Maxim's precision analog switch product line, engineered for applications demanding low distortion, guaranteed matching, and robust operation in single-supply environments from −40°C to +85°C.

FAQ

What is the maximum supply voltage rating for the MAX4591EUE?

The MAX4591EUE has an absolute maximum V+ rating of +17V, but it is fully specified for reliable operation at +12V or +15V single-supply conditions. Operating beyond +15V may degrade R_ON stability and leakage performance, and is not guaranteed by the datasheet. For designs targeting +15V, the MAX4591EUE delivers 16Ω max R_ON, 1.5Ω max R_ON match, and 1.5Ω max flatness - all tested and guaranteed across −40°C to +85°C.

Does the MAX4591EUE require a negative supply voltage?

No, the MAX4591EUE operates from a single positive supply (V+ = +12V or +15V) with V− tied to GND. Its architecture supports rail-to-rail analog signal switching from 0V to V+, eliminating the need for dual supplies. The V− pin serves as the substrate reference and must be connected to ground; leaving it floating will cause functional failure. This single-supply capability simplifies power design in portable test gear and embedded control modules using the MAX4591EUE.

How does the MAX4591EUE's normally closed (NC) configuration impact system safety?

The MAX4591EUE's NC topology ensures automatic signal continuity when logic inputs are inactive (IN = 0V) or during power loss - a critical fail-safe behavior in guidance systems and disk drive servo loops. Unlike NO switches, the MAX4591EUE defaults to closed state, preventing open-circuit faults that could disrupt feedback paths. This inherent safety margin is validated across −40°C to +85°C and requires no external components, making the MAX4591EUE ideal for mission-critical analog routing where reliability trumps flexibility.

Can the MAX4591EUE replace DG611 devices without PCB changes?

Yes, the MAX4591EUE is explicitly pin-compatible with DG611/DG211 families in the same 16-pin TSSOP package, sharing identical pin functions and spacing. However, due to its lower R_ON (16Ω vs. 35Ω typ), faster switching (≤80ns vs. ~150ns), and guaranteed matching/flatness specs, the MAX4591EUE delivers measurable performance gains in existing DG611-based designs - particularly in high-accuracy test equipment and sampling systems where the MAX4591EUE's 5pC charge injection directly improves measurement repeatability.

What is the guaranteed leakage performance of the MAX4591EUE at elevated temperature?

The MAX4591EUE guarantees ≤5nA max COM on-leakage and ≤5nA max NO/NC off-leakage at +85°C - verified by 100% testing at maximum rated hot temperature and correlated at +25°C. This specification ensures stable performance in military radios and avionics systems where thermal stress degrades conventional analog switches. At room temperature, leakage is further reduced to ≤0.1nA, enabling ultra-high-impedance applications like piezoelectric sensor conditioning where the MAX4591EUE's leakage floor directly determines signal-to-noise ratio.