Analog Devices Inc./Maxim Integrated MAX4690EWE

Overview

MAX4690EWE from Maxim Integrated is a dual SPST normally open (NO) CMOS analog switch optimized for rail-to-rail signal routing in precision instrumentation and automated test equipment. It delivers 1.25Ω max on-resistance, 0.3Ω max on-resistance match between channels, and 5nA max off-leakage at +85°C, enabling low-distortion switching of ±10V analog signals in data acquisition systems.

For engineers reviewing the MAX4690EWE datasheet, MAX4690EWE pinout, MAX4690EWE application, or MAX4690EWE equivalent, key selection criteria include guaranteed NO configuration, wide ±4.5V to ±20V dual-supply or +4.5V to +36V single-supply operation, TTL/CMOS-compatible control inputs with separate VL pin, and >2kV ESD protection per Method 3015.7.

Technical Context

The MAX4690EWE implements two independent normally open analog switches using high-voltage CMOS process technology, supporting true rail-to-rail analog signal handling across its full supply range. Its architecture guarantees break-before-make timing only in the MAX4700 variant - the MAX4690EWE has no break-before-make requirement and operates with simple ON/OFF logic control.

Each switch channel features matched on-resistance (≤0.3Ω difference) and flat on-resistance (≤0.3Ω variation over ±10V signal range), critical for minimizing gain error and harmonic distortion in multiplexed signal paths. The dedicated VL pin decouples logic-level compatibility from analog supply rails, allowing interface with 3.3V or 5V controllers while operating analog supplies up to ±20V.

Key Specifications

Pinout & Package

MAX4690EWE is housed in a 16-pin Wide SO (SOIC-W) package, measuring 10.3mm × 7.5mm × 2.3mm, with standard 1.27mm pitch and gull-wing leads suitable for surface-mount reflow assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG1419BRUZ and TS5A3159DCKR, the MAX4690EWE uniquely supports true dual-supply operation with isolated logic interface and guaranteed NO behavior - essential for high-reliability, wide-signal-range industrial and test applications where supply independence and fail-safe defaults are mandatory.

Availability

MAX4690EWE is available at Aetrix Electronics and suitable for automated test equipment, precision data acquisition systems, and communication infrastructure requiring stable component supply across extended temperature ranges (−40°C to +85°C) and long production lifecycles.

Supply support for MAX4690EWE 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 high-performance analog and mixed-signal ICs for industrial, automotive, communications, and computing applications.

The MAX4690EWE belongs to the MAX4680/MAX4690/MAX4700 family of precision analog switches, engineered specifically for replacing mechanical relays and enabling high-fidelity, low-distortion signal routing in demanding test and measurement systems.

FAQ

What is the maximum analog signal voltage range supported by the MAX4690EWE?

The MAX4690EWE supports rail-to-rail analog signals from V− to V+, enabling operation with ±4.5V to ±20V dual supplies or +4.5V to +36V single supply. When V− = GND and V+ = +12V, it handles 0V to +12V signals; with V+ = +15V and V− = −15V, it routes −15V to +15V signals without clipping. This range is confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables of the official datasheet.

Does the MAX4690EWE have break-before-make functionality?

No, the MAX4690EWE does not feature break-before-make switching. It is a dual normally open (NO) switch with independent ON/OFF control per channel. Break-before-make is guaranteed only in the MAX4700 variant (one NO + one NC switch). The MAX4690EWE truth table shows simultaneous OFF→ON and ON→OFF transitions, making it unsuitable for applications requiring guaranteed isolation during state change.

Can the MAX4690EWE operate with a 3.3V logic controller while using ±15V analog supplies?

Yes. The MAX4690EWE includes a dedicated VL pin that accepts 3.3V or 5V logic supplies independently of V+ and V−. With VL = +3.3V, IN1/IN2 recognize 0.8V low and 2.4V high thresholds, enabling direct interface to 3.3V microcontrollers or FPGAs - even when V+ = +15V and V− = −15V. This separation is explicitly defined in the "Logic Input Voltage" specifications and Pin Description section.

What is the thermal performance of the MAX4690EWE in Wide SO package?

In its 16-pin Wide SO package, the MAX4690EWE has a thermal resistance θJA of 105°C/W and a maximum continuous power dissipation of 762mW at TA = +70°C (derating 9.52mW/°C above +70°C). At full ±15V dual supply and 10mA per channel, total quiescent power is under 1.5mW - well within safe limits. These values are specified in the Absolute Maximum Ratings table and confirmed in the Package Information section.

How does the MAX4690EWE compare to the MAX4680EWE in terms of switch configuration?

The MAX4690EWE contains two normally open (NO) switches, meaning both paths are open-circuit by default and close only when IN1 or IN2 is driven high. In contrast, the MAX4680EWE implements two normally closed (NC) switches - conducting by default and opening upon logic high. This functional distinction is fundamental: MAX4690EWE provides fail-open safety; MAX4680EWE provides fail-closed continuity. Pinouts differ accordingly (NO1/NO2 vs. NC1/NC2), and they are not interchangeable without circuit redesign.