Analog Devices Inc./Maxim Integrated MAX4680EAE+T

Overview

MAX4680EAE+T from Maxim Integrated is a dual SPST analog switch with two normally closed (NC) channels, 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, enabling low-distortion switching in data acquisition and automatic test equipment.

For engineers reviewing the MAX4680EAE+T datasheet, MAX4680EAE+T pinout, MAX4680EAE+T application, or MAX4680EAE+T equivalent, key selection criteria include guaranteed NC configuration, ±4.5V to ±20V dual-supply or +4.5V to +36V single-supply operation, TTL/CMOS-compatible logic inputs via dedicated VL pin, and break-before-make absence (exclusive to MAX4700).

Technical Context

The MAX4680EAE+T implements CMOS-based transmission-gate architecture with independent channel control, supporting true rail-to-rail analog signal handling across its full supply range. Its on-resistance flatness is specified at ≤0.3Ω over the entire signal range, and input logic thresholds are fixed at 0.8V (low) and 2.4V (high) regardless of supply voltage.

It features separate analog (V+, V−, GND) and logic (VL) supply domains, allowing mixed-voltage system interfacing without level-shifting. Internal ESD protection exceeds 2kV per Method 3015.7, and all analog pins tolerate signals beyond rails via integrated clamping diodes.

Key Specifications

Pinout & Package

MAX4680EAE+T is housed in a 16-pin SSOP (Shrink Small Outline Package) with 0.65mm pitch, measuring 5.0mm × 6.2mm, suitable for space-constrained PCB layouts while maintaining thermal performance up to +85°C ambient.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4680EAE+T, MAX4690EAE+T offers inverted logic polarity but identical analog performance, while ADG1419BRUZ sacrifices dual-supply operation and logic supply independence for lower unit cost in simpler systems.

Availability

MAX4680EAE+T is available at Aetrix Electronics and suitable for reed relay replacement, data acquisition systems, and test equipment requiring stable component supply across industrial temperature ranges (-40°C to +85°C).

Supply support for MAX4680EAE+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.

The MAX4680 series belongs to Maxim's precision analog switch product line, engineered for low-R_ON, rail-to-rail operation, and robust performance in automated test, instrumentation, and signal routing systems.

FAQ

What is the default switch state of MAX4680EAE+T?

The MAX4680EAE+T features two normally closed (NC) switches - meaning each channel conducts (ON) when its respective IN pin is at logic low (≤0.8V), and opens (OFF) when IN is at logic high (≥2.4V). This fail-safe behavior ensures continuity during power loss or controller reset, making MAX4680EAE+T ideal for safety-critical signal paths where default closure is required.

Does MAX4680EAE+T support dual-supply operation?

Yes, MAX4680EAE+T operates from ±4.5V to ±20V dual supplies, enabling true bipolar signal handling. When used in dual-supply mode, V+ connects to the positive rail, V− to the negative rail, and GND serves as the reference. The device maintains 1.25Ω max on-resistance and rail-to-rail signal capability across this full range, and MAX4680EAE+T's separate VL pin ensures TTL/CMOS logic compatibility regardless of analog supply levels.

Can MAX4680EAE+T handle signals beyond the supply rails?

No - MAX4680EAE+T does not support overvoltage tolerant operation. Analog signals applied to COM, NC, or NO pins must remain within the range of V− −0.3V to V+ +0.3V per absolute maximum ratings. Exceeding these limits risks permanent damage. Internal clamping diodes limit excursion but are not rated for sustained conduction; external protection (e.g., series diodes) is required for overvoltage scenarios, as documented in Maxim's application note for MAX4680EAE+T.

What is the purpose of the VL pin on MAX4680EAE+T?

The VL pin on MAX4680EAE+T provides an independent logic supply reference, decoupling input threshold definition from analog supply noise. It sets fixed 0.8V (low) and 2.4V (high) logic thresholds regardless of V+ or V− voltage, enabling reliable interfacing with 3.3V or 5V microcontrollers even when analog rails operate at ±15V. This separation prevents false triggering due to supply coupling and is a distinguishing feature of MAX4680EAE+T versus non-VL analog switches.

Is MAX4680EAE+T pin-compatible with MAX4690EAE+T?

Yes - MAX4680EAE+T and MAX4690EAE+T share identical 16-pin SSOP packaging, pinout, and electrical specifications except for switch configuration: MAX4680EAE+T has dual NC channels, while MAX4690EAE+T has dual NO channels. Their IN, COM, NC/NO, supply, and GND pins align exactly, allowing direct PCB substitution when logic polarity and default state requirements change - no layout revision is needed to swap MAX4680EAE+T for MAX4690EAE+T or vice versa.