Analog Devices Inc./Maxim Integrated MAX4690CWE+T

Overview

MAX4690CWE+T from Maxim Integrated is a dual SPST normally open (NO) CMOS analog switch with 1.25Ω max on-resistance, 0.3Ω max on-resistance match between channels, and rail-to-rail signal handling up to ±20V dual supply or +36V single supply. It features TTL/CMOS-compatible logic inputs via dedicated VL pin, <5nA off-leakage at +85°C, and operates over 0°C to +70°C in 16-pin wide SO package - ideal for precision data acquisition and automated test equipment where mechanical relay replacement is required.

For engineers reviewing the MAX4690CWE+T datasheet, MAX4690CWE+T pinout, MAX4690CWE+T application, or MAX4690CWE+T equivalent, key selection criteria include guaranteed NO configuration, break-before-make absence (distinguishing it from MAX4700), dual-/single-supply flexibility, low charge injection (±60pC), and ESD robustness (>2kV per Method 3015.7).

Technical Context

The MAX4690CWE+T implements two independent CMOS transmission-gate switches with true normally open behavior: each switch conducts only when its respective INx input is logic high (≥2.4V). Its architecture guarantees matched on-resistance (ΔRON ≤ 0.3Ω) and flat on-resistance (R_FLAT(ON) ≤ 0.3Ω) across the full ±10V analog signal range, enabling low-distortion signal routing in precision instrumentation.

It supports separate analog (V+, V−) and logic (VL) supplies - decoupling logic-level compatibility from analog rail constraints - and includes internal ESD protection diodes on all analog pins. Unlike the MAX4700, it lacks break-before-make timing control, making it suitable for non-critical switching where simultaneous conduction poses no system risk.

Key Specifications

Pinout & Package

MAX4690CWE+T is housed in a 16-pin wide SO (SOIC-W) package with exposed pad (not thermally enhanced), footprint compatible with industry-standard 16-pin SOIC-W layouts. Pin 1 is located at the top-left corner adjacent to the index mark.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4690CWE+T, MAX4690EWE+ extends thermal capability without altering electrical behavior, while ADG1419BRUZ sacrifices dual-supply flexibility and logic supply independence - making MAX4690CWE+T optimal for mixed-voltage, rail-to-rail test and instrumentation designs.

Availability

MAX4690CWE+T is available at Aetrix Electronics and suitable for reed relay replacement, data acquisition systems, and test equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for MAX4690CWE+T 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 precision, power, and interface applications - emphasizing reliability, integration, and ruggedness.

The MAX4680/MAX4690/MAX4700 family was engineered specifically for solid-state replacement of electromechanical relays in automatic test equipment and industrial signal routing, prioritizing low R_ON, rail-to-rail operation, and supply flexibility.

FAQ

What is the maximum analog signal voltage range supported by the MAX4690CWE+T?

The MAX4690CWE+T supports rail-to-rail analog signals from V− to V+, enabling operation across ±20V dual supply or +36V single supply. With V− = GND and V+ = +36V, it handles 0V to +36V signals; with V+ = +15V and V− = −15V, it passes ±15V signals without distortion or clipping - confirmed in Electrical Characteristics tables for both supply configurations.

Does the MAX4690CWE+T have break-before-make switching behavior?

No, the MAX4690CWE+T does not feature break-before-make switching. It is a dual normally open (NO) switch with independent control inputs (IN1, IN2); each channel transitions directly between open and closed states without guaranteed dead time. Break-before-make is exclusive to the MAX4700 variant, as explicitly stated in the General Description and Truth Tables.

Can the MAX4690CWE+T operate with a 3.3V logic supply while using ±15V analog supplies?

Yes. The MAX4690CWE+T includes a dedicated VL pin that accepts 3.3V or 5V logic supplies independently of V+ and V−. When VL = +3.3V, logic inputs (IN1, IN2) recognize ≥2.4V as high and ≤0.8V as low - fully compatible with 3.3V microcontrollers even while V+ = +15V and V− = −15V, as verified in the Electrical Characteristics table under "Logic Input Voltage High/Low".

What is the thermal operating range of the MAX4690CWE+T?

The MAX4690CWE+T is specified for commercial temperature operation from 0°C to +70°C, as indicated by the "C" suffix in its ordering code. This range is validated across all electrical parameters in the datasheet's "ELECTRICAL CHARACTERISTICS" sections, including R_ON, leakage, and switching times - distinct from the extended −40°C to +85°C "E" grade variants like MAX4690EWE+.

How is the MAX4690CWE+T protected against electrostatic discharge?

The MAX4690CWE+T provides >2kV ESD protection per Human Body Model (HBM) Method 3015.7 on all pins, as stated in the Features list and confirmed in Absolute Maximum Ratings. This protection is implemented via integrated diode clamps on analog pins (COM, NO, V+, V−), enabling robust handling during board assembly and field service without requiring external TVS devices.