Analog Devices Inc./Maxim Integrated MAX396CWI

Overview

MAX396CWI from Maxim Integrated is a precision 16-channel single-ended CMOS analog multiplexer designed for low-voltage signal routing in data acquisition and test systems. It delivers ≤100Ω on-resistance (max), ≤6Ω channel-to-channel R_ON matching, and <1nA input off-leakage at +85°C, operating from +2.7V to +16V single supply or ±2.7V to ±8V dual supplies.

For engineers reviewing the MAX396CWI datasheet, MAX396CWI pinout, MAX396CWI application, or MAX396CWI equivalent, this device supports high-accuracy analog switching in battery-powered instrumentation, automated test equipment, and industrial process control where low charge injection (≤5pC) and flat on-resistance over signal range are critical.

Technical Context

The MAX396CWI implements a CMOS transmission-gate architecture with silicon-gate process optimization for minimal charge injection and ESD robustness (>2000V). Its address decoding logic (A0–A3) and enable input (EN) select one of 16 bidirectional analog paths between COM and NO1–NO16.

It guarantees break-before-make switching (t_OPEN ≤70ns), fast transition time (<250ns), and maintains R_ON flatness ≤10Ω across ±3.5V signal range under ±5V supplies - enabling precision signal integrity in sample-and-hold and multiplexed ADC front-ends.

Key Specifications

Pinout & Package

MAX396CWI is housed in a 28-pin Wide SOIC (SO) package with 0.3" body width and standard 0.050" lead pitch. Pin 1 is marked by a beveled corner or dot; pin numbering follows standard SOIC convention (counterclockwise from pin 1).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX306CWI and DG406DN, the MAX396CWI provides tighter R_ON matching and lower leakage for high-accuracy DC measurements, while its guaranteed 5pC charge injection makes it uniquely suitable for precision sample-and-hold and low-drift sensor interfaces.

Availability

MAX396CWI is available at Aetrix Electronics and suitable for automated test equipment, industrial process control, and precision data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX396CWI 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 and mixed-signal ICs for demanding industrial, automotive, and communications applications.

The MAX396 product line targets high-fidelity analog signal routing in test and measurement systems, emphasizing low on-resistance matching, ultra-low leakage, and minimal charge injection for DC-accurate multiplexing.

FAQ

What is the maximum supply voltage rating for MAX396CWI?

The MAX396CWI supports a single supply up to +16V or dual supplies up to ±8V. Absolute maximum ratings specify V+ to V− ≤17V and any terminal voltage within (V− −2V) to (V+ +2V). Exceeding these limits risks permanent damage. For reliable operation, maintain V+ ≤+16V and V− ≥−8V with proper sequencing (V+ first, then V−, then logic inputs).

Does MAX396CWI support single-supply operation down to 2.7V?

Yes, the MAX396CWI is fully specified for single-supply operation from +2.7V to +16V. At +2.7V, R_ON increases (up to 650Ω typ), and switching times lengthen, but logic compatibility (VAL ≤0.8V, VAH ≥2.4V) and leakage performance remain guaranteed. Operation below +2.7V is not characterized and not recommended for production use.

How does the enable (EN) pin function on MAX396CWI?

The EN pin is an active-high digital control that enables or disables all 16 analog switches. When EN is low, all switches are open (high-impedance), isolating COM from NO1–NO16 regardless of address inputs. When EN is high, the A0–A3 address selects one channel to connect. EN has CMOS-compatible thresholds and draws <0.1µA, making it suitable for direct microcontroller GPIO interfacing.

What is the significance of R_ON flatness being ≤10Ω for MAX396CWI?

R_ON flatness ≤10Ω means the on-resistance varies by no more than 10Ω across the full specified analog signal range (e.g., ±3.5V with ±5V supplies). This ensures consistent gain and minimal distortion when routing varying-amplitude signals - critical for linearity in precision instrumentation and audio applications where signal-dependent resistance changes cause harmonic distortion.

Can MAX396CWI be used in a dual-supply configuration with unbalanced rails like +10V and −5V?

Yes, the MAX396CWI supports unbalanced dual supplies such as +10V and −5V, provided the total V+ to V− difference does not exceed 17V and each rail stays within absolute maximum ratings. In this configuration, the analog signal range becomes −5V to +10V, and R_ON performance remains within datasheet limits as long as V+ ≥2.7V above V−. Layout should maintain clean, low-impedance return paths for both supplies.