Analog Devices Inc./Maxim Integrated MAX397CAI-T

Overview

MAX397CAI-T from Maxim Integrated is a dual 8-channel CMOS analog multiplexer designed for precision signal routing in low-voltage systems. It features 100Ω max on-resistance, ≤6Ω channel-to-channel R_ON matching, and <1nA input off-leakage at +85°C, enabling high-fidelity switching in battery-powered data acquisition and audio routing applications.

For engineers reviewing the MAX397CAI-T datasheet, MAX397CAI-T pinout, MAX397CAI-T application, or MAX397CAI-T equivalent, key selection criteria include guaranteed R_ON flatness (≤10Ω), low charge injection (≤5pC), dual ±2.7V to ±8V or single +2.7V to +16V supply operation, and TTL/CMOS logic compatibility - all critical for low-distortion, low-power analog front-end design.

Technical Context

The MAX397CAI-T implements a precision CMOS transmission-gate architecture with substrate-connected-to-V+ topology, delivering flat on-resistance over ±3.5V signal ranges and minimal voltage-dependent distortion. Its dual 8-channel configuration supports independent address decoding (A0–A2) and global enable (EN) control for two separate analog signal paths (COMA/NO1A–NO8A and COMB/NO1B–NO8B).

It guarantees electrostatic discharge protection >2000V (HBM), operates across 0°C to +70°C, and maintains sub-250ns transition time and <70ns break-before-make interval under full temperature range - essential for time-critical sampling and test equipment signal integrity.

Key Specifications

Pinout & Package

MAX397CAI-T is housed in a 28-pin SSOP (Shrink Small Outline Package) with 0.635mm pitch, footprint-compatible with industry-standard 28-pin SO packages but with reduced board area.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX397CAI-T, MAX307CWI offers identical mechanical fit but lacks dual-bank functionality, while ADG1408BRUZ delivers lower R_ON in single-supply designs but sacrifices bipolar operation, leakage performance, and channel matching - making MAX397CAI-T uniquely suited for precision dual-path, wide-supply analog routing.

Availability

MAX397CAI-T is available at Aetrix Electronics and suitable for automatic test equipment, low-voltage data acquisition systems, and industrial process control applications requiring stable component supply, long-term lifecycle support, and guaranteed parametric performance across temperature.

Supply support for MAX397CAI-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 MAX396/MAX397 product line was engineered for precision, low-voltage analog signal routing in space-constrained, battery-sensitive, and high-reliability systems - emphasizing R_ON matching, low leakage, and robust ESD tolerance.

FAQ

What is the maximum analog signal range supported by the MAX397CAI-T?

The MAX397CAI-T supports an analog signal range from V− to V+, spanning ±3.5V with ±5V dual supplies or 0V to 3.5V with +5V single supply. This rail-to-rail capability allows full utilization of ADC input ranges and preserves dynamic headroom in precision measurement circuits using the MAX397CAI-T.

Does the MAX397CAI-T require external pull-up resistors on its address lines (A0–A2)?

No, the MAX397CAI-T does not require external pull-up resistors on A0–A2 or EN. Its digital inputs are TTL/CMOS compatible with defined logic thresholds (VAL ≤ 0.8V, VAH ≥ 2.4V) and draw less than 0.1µA input current, allowing direct interfacing with microcontrollers and FPGA GPIOs without additional biasing components - a key feature of the MAX397CAI-T.

Can the MAX397CAI-T operate with unbalanced supplies such as +10V and −5V?

Yes, the MAX397CAI-T supports unbalanced supplies - for example, +10V and −5V - as long as the total voltage difference (V+ − V−) remains within 17V and each supply stays within its absolute maximum rating (V+ ≤ +17V, V− ≥ −17V). This flexibility simplifies power design in mixed-rail systems using the MAX397CAI-T.

What is the thermal performance of the MAX397CAI-T in its SSOP package?

The MAX397CAI-T in 28-pin SSOP has a thermal resistance θ_JA of 105°C/W. At ambient +70°C and 1000mW power dissipation, junction temperature reaches ~175°C - exceeding safe limits. In practice, typical power dissipation is <10μW, keeping junction temperature within 1°C of ambient, ensuring reliable operation across the 0°C to +70°C range specified for the MAX397CAI-T.

How does the MAX397CAI-T handle power supply sequencing during startup?

The MAX397CAI-T recommends V+ applied first, then V−, followed by logic inputs and analog signals. Improper sequencing may cause latch-up or transient glitches. While internal protection diodes limit damage, external series diodes (as shown in Figure 1 of the datasheet) are advised for systems with uncertain ramp timing - a safeguard explicitly validated for the MAX397CAI-T.