Analog Devices Inc./Maxim Integrated MAX398ESE+T

Overview

The MAX398ESE+T from Maxim Integrated is an 8-channel precision CMOS analog multiplexer with low on-resistance (<100Ω), matched within 6Ω between channels, flat on-resistance (≤11Ω over signal range), and guaranteed low charge injection (<5pC). It operates from single +3V to +15V or bipolar ±3V to ±8V supplies and is used in battery-operated data-acquisition systems requiring rail-to-rail signal handling and minimal channel crosstalk.

For engineers reviewing the MAX398ESE+T datasheet, MAX398ESE+T pinout, MAX398ESE+T application, or MAX398ESE+T equivalent, key selection criteria include on-resistance matching, leakage current at +85°C, enable switching timing, supply voltage flexibility, and compatibility with legacy DG408/DG508A designs.

Technical Context

The MAX398ESE+T implements a monolithic CMOS switch architecture with silicon-gate process optimization for low charge injection and ESD robustness (>2000V). Its decoder logic accepts three address lines (A0–A2) and an active-high enable (EN) to select one of eight bidirectional analog paths between COM and NO1–NO8.

It supports rail-to-rail analog signal handling across its full supply range and maintains low off-leakage (NO off-leakage <1nA, COM off-leakage <2.5nA at +85°C) and fast transition time (<250ns) under dual-supply operation. The device is specified for –40°C to +85°C industrial temperature range and uses a narrow 16-pin SOIC package with exposed pad connected to V+.

Key Specifications

Pinout & Package

The MAX398ESE+T is housed in a 16-pin narrow SOIC (SOICN) package with exposed pad (EP), where EP must be connected to V+. Pin 1 is A0 (LSB address), pins 2–5 are NO1–NO4, pin 6 is COM, pins 7–10 are NO8–NO5, pin 11 is EN, pin 12 is GND, pin 13 is V+, pin 14 is A1, pin 15 is A2 (MSB address), and pin 16 is V−.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX398CSE+ and ADG408BRZ, the MAX398ESE+T delivers guaranteed industrial-temperature operation, tighter RON matching (<6Ω), and lower charge injection (<5pC), making it optimal for high-fidelity data acquisition where channel uniformity and thermal stability are critical.

Availability

MAX398ESE+T is available at Aetrix Electronics and suitable for battery-operated instrumentation, industrial sensor networks, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX398ESE+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 consumer applications.

The MAX398 product line delivers precision analog switching solutions optimized for low distortion, low leakage, and high channel uniformity in data-acquisition and signal-routing systems.

FAQ

What is the maximum analog signal range supported by the MAX398ESE+T?

The MAX398ESE+T supports rail-to-rail analog signals from V− to V+. With ±5V dual supplies, the range is ±4.5V; with +5V single supply, it is 0V to +4.5V. The device guarantees flat on-resistance over this full range, preserving signal fidelity without clipping or gain variation.

Does the MAX398ESE+T require external pull-up resistors on its address or enable pins?

No, the MAX398ESE+T does not require external pull-up resistors. Its CMOS logic inputs (A0, A1, A2, EN) have high impedance and are compatible with standard TTL/CMOS voltage thresholds (0.8V low, 2.4V high). Input currents remain below ±0.1µA across temperature, eliminating need for biasing components.

Can the MAX398ESE+T operate from a +3.3V single supply?

Yes, the MAX398ESE+T is fully specified for +3V to +15V single-supply operation. At +3.3V, on-resistance increases to ~425Ω (typical), and transition time extends to ~575ns - both values are guaranteed in the datasheet. This makes it viable for low-voltage embedded systems where power efficiency is critical.

How is electrostatic discharge protection implemented in the MAX398ESE+T?

The MAX398ESE+T incorporates on-chip ESD protection diodes on all pins, rated to >2000V per Human Body Model (HBM). This protection is process-integrated and guaranteed across the full –40°C to +85°C operating range, eliminating need for external TVS devices in most board-level ESD scenarios.

Is the exposed pad on the MAX398ESE+T package required to be connected to V+?

Yes, the exposed pad (EP) on the MAX398ESE+T's narrow SOIC package must be soldered and electrically connected to V+. This connection improves thermal dissipation and stabilizes the substrate potential, which is internally tied to V+. Leaving EP floating or connecting it to GND violates the absolute maximum ratings and may cause latch-up or parametric shift.