Analog Devices Inc./Maxim Integrated MAX4333EUB

Overview

The MAX4333EUB from Maxim Integrated is a dual, low-power, rail-to-rail input/output operational amplifier with shutdown control, designed for precision signal conditioning in single-supply, low-voltage systems. It delivers 3MHz gain-bandwidth, 245µA per amplifier quiescent current, ±0.25mV typical input offset voltage, and operates from +2.3V to +6.5V - enabling use in battery-powered data-acquisition front-ends and portable medical sensors.

For engineers reviewing the MAX4333EUB datasheet, MAX4333EUB pinout, MAX4333EUB application, or MAX4333EUB equivalent, key selection criteria include its dual-channel configuration in 10-pin µMAX package, 9µA shutdown current per amplifier, rail-to-rail output swing within 125mV of rails into 2kΩ, and guaranteed operation down to 2.0V supply - critical for ultra-low-power sensor interface designs.

Technical Context

The MAX4333EUB integrates two independent amplifiers sharing a common shutdown (SHDN) control line, each featuring complementary NPN/PNP input stages enabling rail-to-rail common-mode input range extending 250mV beyond VEE and VCC. Its output stage drives 2kΩ loads while maintaining rail-to-rail swing, and it remains stable with capacitive loads up to 150pF without external compensation.

Shutdown mode reduces supply current to 9µA per amplifier while placing outputs in high-impedance state - essential for power-gated analog subsystems. The device exhibits no phase reversal under overdriven inputs and is unity-gain stable, supporting direct use in buffer, gain, and filtering configurations without stability concerns.

Key Specifications

Pinout & Package

MAX4333EUB is housed in a 10-pin µMAX package (3.0mm × 3.0mm, 0.8mm height), optimized for space-constrained portable PCB layouts. Pin numbering follows standard µMAX top-view convention with pin 1 marked by dot or bevel.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual low-power rail-to-rail op amp applications.

Compared with TLV2462IDR and AD8602ARMZ, the MAX4333EUB uniquely balances ultra-low power (245µA/amp + 9µA shutdown), rail-to-rail operation, and dual-channel integration in a compact 10-pin µMAX - making it the optimal choice for space- and energy-constrained portable instrumentation where both performance and efficiency are mandatory.

Availability

MAX4333EUB is available at Aetrix Electronics and suitable for portable medical devices, industrial loop receivers, handheld environmental sensors, and battery-powered data loggers requiring stable component supply across long production lifecycles.

Supply support for MAX4333EUB 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 design leader specializing in high-performance analog, mixed-signal, and power-management ICs for demanding industrial, medical, and communications applications.

The MAX4330–MAX4334 family was engineered specifically for low-voltage, single-supply signal-conditioning in portable and energy-sensitive systems - emphasizing rail-to-rail operation, micropower consumption, and robust input/output behavior under real-world loading conditions.

FAQ

What is the operating supply voltage range for the MAX4333EUB?

The MAX4333EUB operates from a single +2.3V to +6.5V supply or dual ±1.15V to ±3.25V supplies. While the datasheet specifies 2.3V as the minimum, the device typically functions down to 2.0V - a key advantage for extending battery life in primary-cell applications. This range supports direct interfacing with Li-ion, Li-Po, and alkaline battery sources without intermediate regulation.

Does the MAX4333EUB support true rail-to-rail input and output operation?

Yes, the MAX4333EUB features true rail-to-rail input common-mode voltage range extending 250mV beyond both VEE and VCC, and rail-to-rail output swing within 125mV of the rails into a 2kΩ load. This capability ensures maximum dynamic range utilization in low-voltage systems such as 3.3V or 2.5V supply rails, critical for precision sensor signal conditioning.

How does the shutdown mode function on the MAX4333EUB?

The MAX4333EUB enters shutdown mode when the SHDN1 pin is driven below 0.8V (relative to VEE), reducing supply current to 9µA per amplifier and placing both outputs in high-impedance state. Driving SHDN1 above 2V enables normal operation. Pin 10 (SHDN2) is a no-connect terminal and must remain unconnected.

What is the gain-bandwidth product and unity-gain stability status of the MAX4333EUB?

The MAX4333EUB has a 3MHz gain-bandwidth product and is explicitly specified as unity-gain stable. It maintains phase margin >45° and gain margin >10dB under standard test conditions (CL = 15pF, RL = 10kΩ), allowing direct use in voltage-follower, noninverting, and inverting configurations without external compensation components.

Can the MAX4333EUB drive capacitive loads, and what is the maximum stable value?

Yes, the MAX4333EUB is stable driving capacitive loads up to 150pF when combined with appropriate resistive loads - as confirmed in the Capacitive Load Stability graph (Figure TOC21). For loads exceeding this, adding a small series isolation resistor (e.g., 39Ω) between the output and capacitance restores stability without degrading signal integrity in sensor or cable-drive applications.