Analog Devices Inc./Maxim Integrated MAX312EUE+

Overview

MAX312EUE+ from Maxim Integrated is a quad, normally closed (NC), single-pole/single-throw (SPST) CMOS analog switch optimized for precision signal routing in bipolar and single-supply systems. It delivers 6.5Ω typical on-resistance, 1.5Ω max on-resistance matching between channels, and rail-to-rail signal handling from ±4.5V to ±20V dual supplies or +4.5V to +30V single supply. It is used in audio signal routing, test equipment, and data acquisition where low distortion and tight channel matching are critical.

For engineers reviewing the MAX312EUE+ datasheet, MAX312EUE+ pinout, MAX312EUE+ application, or MAX312EUE+ equivalent, key selection criteria include guaranteed R_ON flatness (2Ω max), <2.5nA off-leakage at +85°C, ESD tolerance >2000V per Method 3015.7, and crosstalk >96dB at 20kHz - all validated across –40°C to +85°C operation.

Technical Context

The MAX312EUE+ implements a fully complementary CMOS switch architecture with matched P- and N-channel devices per channel, enabling symmetrical conduction and minimal charge injection (±30pC). Its logic interface accepts TTL/CMOS-compatible inputs referenced to VL (2.4V high, 0.8V low), independent of analog supply rails.

It supports true rail-to-rail analog signal switching: input signals can swing from V– to V+, with internal protection diodes clamping excursions beyond rails. The device exhibits flat on-resistance over its full analog range (±10V with ±15V supplies), and maintains <1.5Ω inter-channel R_ON mismatch across temperature and voltage - critical for multiplexer gain-matching and sample-and-hold accuracy.

Key Specifications

Pinout & Package

MAX312EUE+ is housed in a 16-pin TSSOP package (4.4mm × 5.0mm body, 0.65mm pitch), optimized for space-constrained PCB layouts while maintaining thermal performance up to 85°C ambient.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX312EUE+, MAX313EUE+ offers identical performance in an NO configuration for fail-safe designs, while ADG411BRUZ trades R_ON and matching precision for broader temperature capability - making MAX312EUE+ optimal for applications demanding low distortion, tight channel tracking, and rail-to-rail fidelity.

Availability

MAX312EUE+ is available at Aetrix Electronics and suitable for audio signal routing, test equipment multiplexing, and data acquisition systems requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for MAX312EUE+ 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.

The MAX312/MAX313/MAX314 family was designed specifically for precision analog signal routing in test, measurement, and audio systems where low on-resistance, tight channel matching, and rail-to-rail operation are mandatory.

FAQ

What is the maximum analog signal voltage range supported by the MAX312EUE+?

The MAX312EUE+ supports analog signals from V– to V+ across its full specified supply range: ±4.5V to ±20V (dual supply) or +4.5V to +30V (single supply). With ±15V supplies, it handles ±10V signals with guaranteed R_ON flatness and low distortion - confirmed in the datasheet's Typical Operating Characteristics plots (MAX312-01 through MAX312-04). This rail-to-rail capability is intrinsic to the MAX312EUE+ CMOS architecture.

Is the MAX312EUE+ pin-compatible with the DG411 analog switch?

Yes, the MAX312EUE+ is explicitly pin-compatible with the DG411, as stated in the "Features" section of the datasheet. Both devices use the same 16-pin SO/TSSOP/DIP footprint and identical pin functions (IN, COM, NC, V+, V–, GND, VL). This allows direct replacement in existing DG411-based designs without PCB modification - provided the MAX312EUE+'s higher ESD rating (>2000V) and tighter R_ON specs meet the application's requirements.

What is the guaranteed on-resistance matching between channels for the MAX312EUE+?

The MAX312EUE+ guarantees ≤1.5Ω maximum on-resistance (R_ON) matching between any two channels, measured under identical conditions (ICOM = 10mA, VNO_ or VNC_ = ±10V, TA = TMIN to TMAX). This specification is tested and guaranteed - not just typical - and is critical for applications like multi-channel data acquisition where gain consistency across channels directly impacts measurement accuracy.

Does the MAX312EUE+ support single-supply operation?

Yes, the MAX312EUE+ fully supports single-supply operation from +4.5V to +30V, with V– connected to GND. In this mode, the analog signal range extends from 0V to V+, and the device maintains key specifications including 10Ω max R_ON, ≤2.5nA off-leakage at +85°C, and rail-to-rail switching. Single-supply performance is detailed in the "ELECTRICAL CHARACTERISTICS-Single Supply" table (page 4 of the datasheet).

How does the MAX312EUE+ handle overvoltage conditions on analog pins?

The MAX312EUE+ includes internal ESD protection diodes on all analog pins (COM, NC, NO), which clamp signals exceeding V+ or V– by more than ~0.7V. Per Absolute Maximum Ratings, analog pins tolerate (V– – 2V) to (V+ + 2V), but forward diode current must be limited to 30mA peak. For sustained overvoltage protection beyond ±2V, external series resistors or blocking diodes (as shown in Figure 1 of the datasheet) are recommended - a design consideration inherent to the MAX312EUE+'s architecture.