Analog Devices Inc./Maxim Integrated MAX4680CPE

Overview

MAX4680CPE 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 test equipment.

For engineers reviewing the MAX4680CPE datasheet, MAX4680CPE pinout, MAX4680CPE application, or MAX4680CPE 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 MAX4680CPE implements CMOS-based transmission-gate architecture optimized for low R_ON flatness (≤0.3Ω over full signal range) and matched channel performance. Its dual NC topology enables fail-safe signal continuity when control inputs are de-asserted, critical in reed relay replacement and sample-and-hold hold-path integrity.

It features separate VL logic supply pin ensuring input compatibility across full analog supply range (+4.5V to +36V single or ±4.5V to ±20V dual), while internal ESD protection exceeds 2kV per Method 3015.7. No break-before-make timing is specified - confirming strict NC-only behavior without transition overlap.

Key Specifications

Pinout & Package

MAX4680CPE is housed in a 16-pin plastic DIP package with 0.3-inch body width and through-hole mounting. Pin functions are validated per Maxim's official pin configuration diagram for MAX4680 (Rev 0, 7/99).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4690CPE and ADG1419BRZ, the MAX4680CPE uniquely provides NC default state with isolated VL logic supply - making it optimal for safety-critical hold paths and mixed-voltage test systems where supply independence is mandatory.

Availability

MAX4680CPE is available at Aetrix Electronics and suitable for reed relay replacement, data acquisition systems, and test equipment requiring stable component supply, long-term manufacturability, and guaranteed NC functionality.

Supply support for MAX4680CPE 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 MAX4680 series belongs to Maxim's precision analog switch product line, engineered specifically for low-R_ON, rail-to-rail signal routing in automated test equipment and high-fidelity data acquisition systems.

FAQ

What is the default switch state of MAX4680CPE when no logic signal is applied?

The MAX4680CPE features two normally closed (NC) switches - meaning both channels conduct between COM and NC pins when IN1/IN2 are at logic low (≤0.8V). With no logic signal applied (floating inputs), internal bias may cause undefined behavior; tie IN1/IN2 to GND to ensure reliable NC closure. This default-closed state is fundamental to the MAX4680CPE's role in fail-safe signal paths.

Does MAX4680CPE support dual-supply operation, and what are the valid voltage ranges?

Yes, MAX4680CPE supports dual-supply operation from ±4.5V to ±20V (V+ to V− differential ≤44V). It also operates from a single supply of +4.5V to +36V (with V− tied to GND). The VL pin accepts 2.4V to 5.5V logic supplies independently, allowing TTL/CMOS control regardless of analog rail choice - a key capability confirmed in the MAX4680CPE electrical characteristics table.

Is break-before-make timing specified for MAX4680CPE?

No, break-before-make timing is not specified for MAX4680CPE because it is not implemented. The MAX4680CPE is a pure NC device with no transition overlap guarantee; only the MAX4700 variant in this family includes guaranteed break-before-make (t_OPEN = 5ns to 125ns). Using MAX4680CPE in place of MAX4700 will result in simultaneous conduction during logic transitions - verify system tolerance for momentary shorting.

What is the maximum continuous current rating for MAX4680CPE switch terminals?

The MAX4680CPE supports ±200mA continuous current through COM, NC, or NO terminals (per Absolute Maximum Ratings). Peak pulsed current is ±300mA at 1ms width and 10% duty cycle. Exceeding these limits risks thermal damage or parametric shift; derating is recommended above +70°C ambient per the plastic DIP package's 10.53mW/°C thermal resistance.

Can MAX4680CPE be used with a 3.3V logic supply while operating from ±15V analog rails?

Yes - the dedicated VL pin allows MAX4680CPE to accept 3.3V logic inputs while operating from ±15V analog supplies (V+ = +15V, V− = −15V). This separation ensures TTL/CMOS compatibility without level shifters, as explicitly defined in the "Logic Input Voltage High/Low" specs (VIN_H = 2.4V min, VIN_L = 0.8V max) and verified in dual-supply electrical characteristics tables for MAX4680CPE.