Analog Devices Inc./Maxim Integrated MAX4690CWE+

Overview

MAX4690CWE+ from Maxim Integrated is a dual SPST normally open (NO) CMOS analog switch IC 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 features matched on-resistance (≤0.3Ω), flat on-resistance (≤0.3Ω), and 5nA max off-leakage at +85°C - ideal for precision data acquisition and automatic test equipment.

For engineers reviewing the MAX4690CWE+ datasheet, MAX4690CWE+ pinout, MAX4690CWE+ application, or MAX4690CWE+ equivalent, key selection criteria include guaranteed NO configuration, wide supply range compatibility, TTL/CMOS logic inputs with separate VL pin, low charge injection (±60pC), and ESD protection (>2kV per Method 3015.7).

Technical Context

The MAX4690CWE+ implements dual independent SPST switches with normally open topology, each controlled by dedicated digital inputs (IN1, IN2) referenced to a separate logic supply (VL). Its CMOS architecture enables rail-to-rail analog conduction across the full ±10V signal range while maintaining low distortion and minimal channel-to-channel R_ON mismatch.

It supports break-before-make timing only in the MAX4700 variant - not applicable to MAX4690CWE+. Switching dynamics include 400ns max turn-on time, 300ns max turn-off time, and −65dB crosstalk between channels at 1MHz, verified under dual-supply conditions (V+ = +15V, V− = −15V, VL = +5V).

Key Specifications

Pinout & Package

MAX4690CWE+ is housed in a 16-pin Wide SO (SOIC-W) package with 0.300-inch body width and standard 1.27mm pitch. Pin functions are electrically validated per Maxim's official pin configuration diagram for MAX4690.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG1419BRUZ and TS5A23157DGSR, MAX4690CWE+ uniquely combines dual SPST NO topology, wide dual/single supply range, independent VL logic supply, and guaranteed rail-to-rail operation - making it the only option among the three qualified for industrial test equipment and high-voltage data acquisition.

Availability

MAX4690CWE+ is available at Aetrix Electronics and suitable for reed relay replacement, data acquisition systems, test equipment, sample-and-hold circuits, and communication systems requiring stable component supply across extended temperature and voltage ranges.

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) designs high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.

The MAX4690CWE+ belongs to Maxim's precision analog switch product line, engineered specifically for low-distortion, high-reliability signal routing in automated test equipment and ruggedized data acquisition systems.

FAQ

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

The MAX4690CWE+ supports rail-to-rail analog signals from V− to V+, with guaranteed operation up to ±10V when powered by ±15V supplies. Under single-supply conditions (+12V), it handles signals from 0V to +10V. Absolute maximum ratings allow V+ to V− differentials up to 44V, but signal swing remains constrained by supply rails. This specification is confirmed in the Electrical Characteristics tables for both dual- and single-supply configurations in the official MAX4690 datasheet.

Does the MAX4690CWE+ support break-before-make switching?

No, the MAX4690CWE+ does not feature break-before-make switching. That functionality is exclusive to the MAX4700 variant in the same family. The MAX4690CWE+ implements two independent normally open (NO) SPST switches with no timing coordination between them - meaning both can be turned on simultaneously, and neither guarantees intentional channel separation during transition. This is explicitly stated in the General Description and Pin Configurations sections of the MAX4690 datasheet.

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

The VL pin on the MAX4690CWE+ provides an independent logic supply reference for the IN1 and IN2 digital control inputs. It allows TTL/CMOS-compatible logic thresholds (0.8V low, 2.4V high) to be maintained regardless of the analog supply voltages (V+ and V−). For example, VL can be set to +3.3V while V+ = +24V and V− = 0V - enabling direct interfacing with modern microcontrollers without level shifters. This capability is documented in the Features list and Electrical Characteristics table under "Logic Input Voltage High/Low".

Can the MAX4690CWE+ operate from a single +5V supply?

Yes, the MAX4690CWE+ can operate from a single +5V supply, but with reduced analog signal range. Per the Single-Supply Electrical Characteristics table, V+ must be ≥+4.5V, and the usable analog signal range is from GND to (V+ − 1V) due to internal headroom - so with +5V, signals are limited to 0V–+4V. Full rail-to-rail operation requires higher supplies (e.g., +12V for 0V–+10V swing). This behavior is verified in the Typical Operating Characteristics curves (TOC03 and TOC04).

How is the MAX4690CWE+ protected against electrostatic discharge?

The MAX4690CWE+ incorporates on-chip ESD protection rated at >2kV per Method 3015.7 (human-body model), as specified in the Features section and confirmed in the Absolute Maximum Ratings table. This protection applies to all pins including COM, NO, IN, V+, V−, VL, and GND. No external protection components are required for standard handling and board-level transients, though proper PCB layout (grounding, trace spacing) remains essential for system-level robustness.