Analog Devices Inc./Maxim Integrated MAX4690CWE

Overview

MAX4690CWE from Maxim Integrated is a dual SPST normally open (NO) CMOS analog switch IC designed for precision signal routing in rail-to-rail analog paths. It delivers 1.25Ω max on-resistance, 0.3Ω max R_ON match between channels, and 5nA max off-leakage at +85°C, operating from +4.5V to +36V single supply or ±4.5V to ±20V dual supplies - ideal for reed relay replacement in automated test equipment.

For engineers reviewing the MAX4690CWE datasheet, MAX4690CWE pinout, MAX4690CWE application, or MAX4690CWE equivalent, key selection criteria include guaranteed NO configuration, TTL/CMOS-compatible control with separate VL pin, break-before-make absence (distinguishing it from MAX4700), ESD tolerance (>2kV), and wide-supply flexibility across industrial temperature range (0°C to +70°C).

Technical Context

The MAX4690CWE implements two independent, non-latching SPST NO switches using high-voltage CMOS process technology. Each channel features matched on-resistance (≤0.3Ω difference) and flat on-resistance (≤0.3Ω variation) over ±10V signal range, enabling low-distortion signal switching without gain error or harmonic generation in data acquisition paths.

Its dual-supply architecture supports asymmetric rails (e.g., V+ = +15V, V− = −5V), while the dedicated VL pin decouples logic threshold from analog supply, ensuring reliable 0.8V/2.4V TTL/CMOS input recognition across full ±4.5V to ±20V analog supply range - critical for mixed-signal systems with disparate voltage domains.

Key Specifications

Pinout & Package

MAX4690CWE is housed in a 16-pin Wide SO (SOIC-W) package with 0.3-inch body width and standard 1.27mm pitch. Pin 1 is located at top-left corner with dot marking; device orientation follows JEDEC MS-013.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4690CWE, MAX4690EWE extends temperature capability without altering performance or layout, while ADG1419BRUZ trades supply flexibility and pin compatibility for slightly higher R_ON and fixed logic referencing - making MAX4690CWE optimal for cost-sensitive commercial-grade designs requiring wide supply and logic independence.

Availability

MAX4690CWE is available at Aetrix Electronics and suitable for reed relay replacement, data acquisition systems, and test equipment requiring stable component supply with commercial temperature grade (0°C to +70°C) and 16-pin Wide SO packaging.

Supply support for MAX4690CWE 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.

The MAX4680/MAX4690/MAX4700 family was engineered for low-distortion, high-reliability analog signal routing in automatic test equipment and instrumentation - emphasizing rail-to-rail operation, tight R_ON matching, and robust supply flexibility.

FAQ

What is the maximum signal voltage range supported by the MAX4690CWE?

The MAX4690CWE supports rail-to-rail analog signals from V− to V+, meaning its maximum signal range equals the difference between its analog supply rails. With ±15V dual supplies, it handles ±15V signals; with +36V/V− = GND single supply, it supports 0V to +36V. Absolute maximum ratings limit V+ to +44V and V− to −44V relative to GND.

Does the MAX4690CWE include break-before-make functionality?

No, the MAX4690CWE does not feature break-before-make switching. It is a dual normally open (NO) switch with independent control inputs (IN1, IN2). Break-before-make is exclusive to the MAX4700 variant in this family, which integrates guaranteed timing separation between channel transitions.

Can the MAX4690CWE operate from a single 5V supply?

Yes, the MAX4690CWE can operate from a +5V single supply (V+ = +5V, V− = GND), though its specified R_ON performance degrades slightly at lower voltages. At +5V, typical R_ON is ~1.6Ω (max 3Ω), and rail-to-rail operation covers 0V to +5V - sufficient for many low-voltage sensor or logic-level analog multiplexing tasks.

What is the purpose of the VL pin on the MAX4690CWE?

VL is the logic supply input that sets the input threshold for IN1 and IN2 control pins. It allows TTL/CMOS-compatible logic levels (0.8V low, 2.4V high) regardless of analog supply voltage - enabling 3.3V microcontroller control even when V+ is +24V or V− is −15V, without level-shifting circuitry.

How does the MAX4690CWE compare to mechanical relays in terms of reliability and speed?

The MAX4690CWE offers >1 million operational cycles versus typical mechanical relay lifetime of 100,000–500,000 cycles, with no contact wear or bounce. Its 400ns max turn-on time is over 1000× faster than relay actuation (typically >1ms), enabling rapid signal reconfiguration in automated test systems without mechanical delay or arcing risks.