Analog Devices Inc./Maxim Integrated MAX368CWN+

Overview

MAX368CWN+ from Maxim Integrated is an 8-channel CMOS analog multiplexer with ±15V signal handling capability, on-resistance of 100Ω typical, break-before-make switching, and operates over 0°C to 70°C temperature range. It serves as a precision signal routing device in data acquisition systems requiring high channel isolation and low charge injection.

For engineers reviewing the MAX368CWN+ datasheet, MAX368CWN+ pinout, MAX368CWN+ application, or MAX368CWN+ equivalent, key selection criteria include its dual-supply operation, guaranteed monotonicity, 0.02% typical THD, and compatibility with 5V logic control levels.

Technical Context

The MAX368CWN+ integrates eight independent bidirectional analog switches controlled by three address lines and an enable input. Its CMOS architecture ensures low power consumption (10µA max supply current) and rail-to-rail analog signal swing across ±15V supplies.

Switching is break-before-make to prevent channel shorting; charge injection is specified at 5pC max, supporting accurate sampling in successive-approximation ADC front-ends. Channel-to-channel crosstalk is –80dB at 100kHz.

Key Specifications

Pinout & Package

MAX368CWN+ is housed in a 20-pin wide-body SOIC (SOIC-W) package with 0.300-inch body width and standard 1.27mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG508AKRZ-REEL7 and CD4051BM96, the MAX368CWN+ provides guaranteed break-before-make timing, lower charge injection, and full ±15V rail-to-rail analog operation - critical for high-accuracy data acquisition where signal integrity and channel isolation are design priorities.

Availability

MAX368CWN+ is available at Aetrix Electronics and suitable for industrial data acquisition, automated test equipment, and medical instrumentation requiring stable component supply and long-term sourcing continuity.

Supply support for MAX368CWN+ 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 precision analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.

The MAX368CWN+ belongs to Maxim's high-performance analog switch/multiplexer product line, engineered for precision signal routing in environments demanding low distortion, high channel isolation, and robust dual-supply operation.

FAQ

What is the maximum analog signal voltage range supported by the MAX368CWN+?

The MAX368CWN+ supports analog signals from –15V to +15V when operated with ±15V dual supplies. This rail-to-rail capability allows it to handle full-scale industrial sensor outputs and bipolar instrumentation signals without clipping or distortion. The device maintains specified on-resistance and THD performance across this entire range. Always ensure supply rails are properly decoupled and within absolute maximum ratings per the MAX368CWN+ datasheet.

Does the MAX368CWN+ require external pull-up resistors on its address or enable pins?

No, the MAX368CWN+ does not require external pull-up resistors on A0–A2 or EN pins. Its digital inputs have CMOS-compatible thresholds and internal input leakage below 1µA, allowing direct connection to standard 5V TTL/CMOS logic outputs. Pull-ups are unnecessary unless system-level noise immunity or default-state assurance is required - in which case 10kΩ to VDD is typical. Refer to the MAX368CWN+ functional diagram for exact input structure.

How does the break-before-make feature of the MAX368CWN+ improve system reliability?

The MAX368CWN+ guarantees break-before-make switching, meaning the previously selected channel fully disconnects before the newly addressed channel connects. This eliminates momentary short circuits between analog sources - critical when multiplexing sensors with different output impedances or voltage levels. In data acquisition systems, it prevents cross-talk-induced errors and protects downstream circuitry. This behavior is inherent to the MAX368CWN+ internal architecture and requires no external timing control.

Can the MAX368CWN+ be used with single-supply operation?

The MAX368CWN+ is specified and characterized for dual-supply operation (±15V). While it may function with asymmetric or single-ended supplies (e.g., +15V and GND), performance parameters like on-resistance symmetry, THD, and charge injection are not guaranteed outside the dual-supply configuration. For true single-supply applications, consider alternatives explicitly rated for that mode. Always validate signal integrity and switching behavior under actual MAX368CWN+ operating conditions.

What is the typical power consumption of the MAX368CWN+ in active operation?

The MAX368CWN+ draws less than 10µA of quiescent supply current under normal operating conditions with both V+ and V– supplies applied. This ultra-low power draw remains consistent regardless of channel count or switching state, making it suitable for battery-backed or energy-conscious systems. Power dissipation is dominated by I²R losses during signal conduction - not static bias. Total power in a typical application stays well below 1mW, even with full ±15V signal swing through the MAX368CWN+.