Analog Devices Inc./Maxim Integrated MAX4247AUB+T

Overview

MAX4247AUB+T from Maxim Integrated is a dual-channel, rail-to-rail input/output operational amplifier with integrated shutdown control per channel, designed for ultra-low-power, single-supply sensor signal conditioning and portable instrumentation. It draws 320µA per amplifier at +2.7V, features 1MHz gain-bandwidth product, supports capacitive loads up to 470pF, and operates across -40°C to +125°C.

For engineers reviewing the MAX4247AUB+T datasheet, MAX4247AUB+T pinout, MAX4247AUB+T application, or MAX4247AUB+T equivalent, key selection criteria include dual-channel shutdown capability, µMAX-10 package footprint constraints, rail-to-rail swing under 2kΩ load (≤60mV from rails), THD of 0.01% at 10kHz, and guaranteed operation down to +2.5V supply.

Technical Context

The MAX4247AUB+T implements a composite NPN/PNP rail-to-rail input stage enabling full VSS-to-VDD common-mode range, with crossover near mid-supply and typical ±400µV offset. Its output stage delivers rail-to-rail swing into 2kΩ loads while maintaining stability up to 470pF capacitive loading in unity-gain configuration.

Each amplifier includes independent active-low shutdown pins (SHDNA/SHDNB) that reduce supply current to ≤1µA per channel and place outputs in high-impedance state. The device uses BiCMOS process technology and is specified for harsh industrial environments with guaranteed performance from -40°C to +125°C.

Key Specifications

Pinout & Package

The MAX4247AUB+T is housed in a 10-pin µMAX package (package code U10+2), measuring 3mm × 3mm × 0.8mm with exposed pad for thermal enhancement. This RoHS-compliant, lead(Pb)-free package supports high-density PCB layouts in space-constrained portable and automotive modules.

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 MCP6022-E/SN, the MAX4247AUB+T uniquely combines dual-channel shutdown, µMAX-10 footprint, and guaranteed 125°C operation-making it optimal for thermally constrained, duty-cycled sensor nodes requiring long-term reliability.

Availability

MAX4247AUB+T is available at Aetrix Electronics and suitable for portable communications, infrared receivers, sensor-signal detection, and single-supply zero-crossing detector designs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX4247AUB+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, automotive, and communications markets.

The MAX4245/MAX4246/MAX4247 family was engineered for ultra-low-power, rail-to-rail signal conditioning in battery-operated instrumentation and harsh-environment sensing-prioritizing supply flexibility, thermal robustness, and space efficiency over raw speed.

FAQ

What is the maximum capacitive load the MAX4247AUB+T can drive without oscillation?

The MAX4247AUB+T is unity-gain stable driving capacitive loads up to 470pF, as confirmed in the Electrical Characteristics table and Typical Operating Characteristics section. This specification applies across the full -40°C to +125°C temperature range and eliminates the need for output isolation resistors in most sensor interface and filter applications. Loads exceeding 470pF require an external series resistor to maintain phase margin.

Does the MAX4247AUB+T support dual-supply operation?

Yes, the MAX4247AUB+T supports dual-supply operation from ±1.25V to ±2.75V, as explicitly stated in the Applications Information section. When used in dual-supply mode, VDD connects to the positive rail and VSS to the negative rail; shutdown pins (SHDNA/SHDNB) must be referenced to VSS-not ground-to ensure correct logic thresholds and reliable disable functionality.

How does the shutdown feature work on the MAX4247AUB+T?

The MAX4247AUB+T provides two independent active-low shutdown inputs: SHDNA (Pin 9) controls Channel A and SHDNB (Pin 10) controls Channel B. Pulling either pin below 0.3×VDD places its respective amplifier in shutdown, reducing supply current to ≤1µA and placing the output in high-impedance state. Both pins must be actively driven-leaving them floating may cause indeterminate operation due to internal leakage paths.

What is the input common-mode voltage range of the MAX4247AUB+T?

The MAX4247AUB+T features true rail-to-rail input stage with common-mode voltage range extending from VSS − 0.1V to VDD + 0.1V at +25°C, and VSS to VDD over the full −40°C to +85°C range. This allows direct interfacing with sensors and DACs operating at the supply rails, and enables accurate amplification of signals near ground or near VDD without level-shifting circuitry.

Is the MAX4247AUB+T pin-compatible with other devices in the MAX4245/MAX4246/MAX4247 family?

No, the MAX4247AUB+T is not pin-compatible with MAX4245 or MAX4246 variants due to its 10-pin µMAX package and dual shutdown pin assignment (SHDNA/SHDNB). The MAX4245 uses 6-pin SC70/SOT23, and MAX4246 uses 8-pin SOT23/SO/µMAX packages with no shutdown function. Pin mapping, footprint, and channel count differ fundamentally across the family.