Analog Devices Inc./Maxim Integrated MAX4590EAE+

Overview

The MAX4590EAE+ from Maxim Integrated is a dual SPST normally open (NO) CMOS analog switch with 1.25Ω max on-resistance, ±4.5V to ±20V dual-supply or +4.5V to +36V single-supply operation, and rail-to-rail signal handling up to ±10V. It delivers matched on-resistance (≤0.25Ω), flat on-resistance (≤0.3Ω), and <2.5nA off-leakage at +85°C - ideal for reed relay replacement in automated test equipment.

For engineers reviewing the MAX4590EAE+ datasheet, MAX4590EAE+ pinout, MAX4590EAE+ application, or MAX4590EAE+ equivalent, key selection criteria include guaranteed R_ON matching across channels, TTL/CMOS-compatible logic thresholds (+0.8V/+2.4V), ESD protection >2kV, and SSOP-16 package compatibility with space-constrained PCB layouts.

Technical Context

This device implements two independent, noninverting SPST NO switches using high-voltage CMOS process technology. Each channel features matched and flat on-resistance over its full ±10V analog signal range, enabling low-distortion signal routing without gain or phase error across varying input voltages.

Logic control inputs accept TTL/CMOS levels across supply configurations: with +12V single supply or ±15V dual supplies, thresholds are fixed at +0.8V (low) and +2.4V (high), eliminating level-shifting requirements in mixed-signal systems.

Key Specifications

Pinout & Package

MAX4590EAE+ uses a 16-pin SSOP (Shrink Small Outline Package) with 0.65mm pitch, 5.3mm body width, and JEDEC MO-150 compliance. Pin 1 is marked by a beveled corner or dot; thermal pad is not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG1419BRUZ and TS5A23157DGSR, the MAX4590EAE+ uniquely supports both dual- and single-supply configurations with dedicated VL pin, guaranteed R_ON matching across temperature, and validated >2kV ESD - making it the only option qualified for ruggedized test and telecom infrastructure designs.

Availability

MAX4590EAE+ is available at Aetrix Electronics and suitable for automated test equipment, communication system signal routing, and PBX line interface applications requiring stable component supply, long-term lifecycle support, and industrial temperature grade (-40°C to +85°C).

Supply support for MAX4590EAE+ 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 high-reliability semiconductor solutions for industrial, communications, and test equipment markets.

The MAX4590EAE+ belongs to Maxim's high-voltage analog switch product line, engineered specifically for solid-state reed relay replacement in mission-critical signal routing applications demanding low distortion, high channel matching, and wide supply flexibility.

FAQ

What is the maximum analog signal voltage range supported by the MAX4590EAE+?

The MAX4590EAE+ supports rail-to-rail analog signals from V− to V+, with guaranteed operation up to ±10V differential across COM and NO terminals. When operated on ±15V dual supplies, the full ±10V range is maintained; under +12V single supply (V− = GND), the usable range extends from 0V to +10V. Absolute maximum ratings allow V+ to V− differentials up to 44V, but signal swing remains constrained by supply rails.

Does the MAX4590EAE+ require external level-shifting circuitry when driven by a 3.3V microcontroller?

No, the MAX4590EAE+ does not require external level shifting when driven by a 3.3V microcontroller. Its logic inputs have fixed TTL/CMOS-compatible thresholds of +0.8V (low) and +2.4V (high), which are fully satisfied by 3.3V logic high (≥2.4V) and low (≤0.8V) outputs. The VL pin allows independent logic supply biasing, further ensuring noise-immune switching regardless of analog rail configuration.

How does the MAX4590EAE+ achieve guaranteed R_ON matching between its two switches?

The MAX4590EAE+ achieves guaranteed R_ON matching (≤0.25Ω max) through matched transistor sizing and layout symmetry in its CMOS process design. Both SPST NO channels share identical geometry, doping profiles, and proximity on-die - minimizing process-induced variance. This matching is 100% tested at hot temperature and correlated at +25°C, ensuring consistency across the full -40°C to +85°C operating range without calibration.

Can the MAX4590EAE+ operate with V− floating or disconnected in single-supply mode?

No, V− must be explicitly connected to GND in single-supply mode. Leaving V− floating violates absolute maximum ratings and risks latch-up or undefined switching behavior. The datasheet specifies that V− should be tied to GND for +4.5V to +36V single-supply operation. Internal protection diodes clamp signals exceeding V+ or V−, but proper supply sequencing (V+ first, then V−, then logic) is required to prevent damage - especially when V− is grounded.

What is the purpose of the VL pin on the MAX4590EAE+, and how should it be configured?

The VL pin on the MAX4590EAE+ provides a dedicated logic supply reference for generating stable input thresholds independent of analog V+ and V− rails. It should be connected to a clean +5V source (or same as microcontroller I/O voltage) to ensure consistent +0.8V/+2.4V logic recognition across varying analog supply conditions. Using VL decouples logic decision points from analog rail noise, improving noise immunity and preventing false switching during supply transients.