Analog Devices Inc./Maxim Integrated MAX398ESE+

Overview

MAX398ESE+ from Maxim Integrated is an 8-channel precision CMOS analog multiplexer designed for low-distortion signal routing in battery-powered and precision instrumentation systems. It delivers <100Ω on-resistance (typ. 60Ω), <6Ω channel-to-channel R_ON matching, <5pC charge injection, rail-to-rail analog signal handling (±4.5V or 0–4.5V), and operates from +3V to +15V single supply or ±3V to ±8V dual supplies - enabling use in sample-and-hold circuits and automatic test equipment.

For engineers reviewing the MAX398ESE+ datasheet, MAX398ESE+ pinout, MAX398ESE+ application, or MAX398ESE+ equivalent, key selection criteria include guaranteed on-resistance flatness (<11Ω), NO/COM off-leakage <2.5nA at +85°C, ESD protection >2000V, TTL/CMOS logic compatibility, and pin compatibility with DG408/DG508A.

Technical Context

The MAX398ESE+ implements a monolithic CMOS switch architecture with silicon-gate process optimization to minimize charge injection and leakage across temperature. Its address-decoded 8:1 analog mux core uses three binary inputs (A0–A2) and an active-high enable (EN) to select one of eight bidirectional analog channels (NO1–NO8) to the common port (COM).

It supports both unipolar and bipolar operation without external level-shifting: COM and NO pins handle signals from V− to V+, while logic inputs remain compatible with standard TTL/CMOS thresholds (V_IL ≤ 0.8V, V_IH ≥ 2.4V) across the full −40°C to +85°C industrial temperature range.

Key Specifications

Pinout & Package

Narrow 16-pin SOIC (S16-1) package with exposed pad connected to V+. Pin 1 is A0 (LSB address), pin 2 is EN (enable), pin 3 is V−, pins 4–7 are NO1–NO4, pin 8 is COM, pins 9–12 are NO8–NO5, pin 13 is V+, pin 14 is GND, pin 15 is A2 (MSB), and pin 16 is A1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG408BRZ and TMUX1308PWR, the MAX398ESE+ uniquely guarantees sub-6Ω R_ON matching and <5pC charge injection across −40°C to +85°C, making it the only option qualified for high-accuracy, wide-temperature analog multiplexing without derating.

Availability

MAX398ESE+ is available at Aetrix Electronics and suitable for sample-and-hold circuits, automatic test equipment, and military radio systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX398ESE+ 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 MAX398ESE+ belongs to Maxim's precision analog switch product line, engineered for low-leakage, low-distortion signal routing in demanding instrumentation and test systems where parameter stability over temperature and voltage is critical.

FAQ

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

The MAX398ESE+ supports rail-to-rail analog signals from V− to V+. With ±5V dual supplies, this is ±4.5V; with +5V single supply (V− = GND), it is 0V to 4.5V. The device maintains specified R_ON flatness (<11Ω) and leakage performance across this full range, as verified in the Electrical Characteristics tables for dual and single-supply conditions.

Is the MAX398ESE+ pin-compatible with the DG408?

Yes, the MAX398ESE+ is explicitly designed as a pin-compatible upgrade to the DG408. Pin assignments for address lines (A0–A2), enable (EN), common (COM), analog inputs (NO1–NO8), supply rails (V+, V−), and ground (GND) match the DG408 SOIC footprint. This allows direct replacement in existing layouts without PCB modification.

What is the guaranteed on-resistance matching specification for the MAX398ESE+?

The MAX398ESE+ guarantees ΔR_ON (maximum difference between any two channels) to be less than 6Ω across the full operating temperature range (−40°C to +85°C). This is measured at I_NO = 1mA with V_COM = ±3.5V and V+ = 5V, V− = −5V, and is critical for applications requiring matched gain or attenuation across multiple channels.

Does the MAX398ESE+ support single-supply operation?

Yes, the MAX398ESE+ operates from a single +3V to +15V supply. In this mode, V− must be connected to GND. The device retains CMOS/TTL logic compatibility and fast switching performance, with specifications including R_ON = 280Ω max (at +5V), charge injection <5pC, and off-leakage <2.5nA at +85°C - all validated in the Single +5V Electrical Characteristics table.

How is ESD protection implemented in the MAX398ESE+?

The MAX398ESE+ incorporates on-chip ESD protection structures that guarantee >2000V human-body-model (HBM) rating. This is achieved via internal diode clamps on all pins referenced to V+ and V−, as noted in Absolute Maximum Ratings. No external protection components are required for standard handling, though proper PCB layout (short traces, solid ground plane) is recommended to maintain this rating in system-level ESD events.