Analog Devices Inc./Maxim Integrated MAX4092AUA

Overview

MAX4092AUA from Maxim Integrated is a dual, micropower, single-supply rail-to-rail operational amplifier with 500kHz gain-bandwidth product, 30µV input offset voltage, and 165µA max quiescent current per amplifier. It operates from 2.7V to 6V, delivers rail-to-rail output swing into 1kΩ, and supports battery-powered data acquisition systems requiring precision low-voltage signal conditioning.

For engineers reviewing the MAX4092AUA datasheet, MAX4092AUA pinout, MAX4092AUA application, or MAX4092AUA equivalent, key selection criteria include its ±3.5mV max input offset over temperature, 2000pF capacitive-load stability, -40°C to +125°C operating range, and µMAX-8 package compatibility with space-constrained industrial sensor interfaces.

Technical Context

The MAX4092AUA integrates two independent bipolar op amps sharing a common VCC and VEE supply, each featuring complementary PNP/NPN input stages enabling beyond-the-rails input operation (VEE − 0.05V to VCC + 0.05V) and no phase reversal under overdrive. Its folded-cascode architecture achieves 115dB open-loop gain and 90dB CMRR at 25°C.

Stability is maintained up to 2000pF capacitive load in unity-gain configuration without external compensation, enabled by internal frequency compensation optimized for low-quiescent-current operation. Input-referred voltage noise is 12nV/√Hz at 10kHz, and large-signal settling time to 0.1% is 12µs for a 2V step.

Key Specifications

Pinout & Package

The MAX4092AUA is housed in an 8-pin µMAX package (3mm × 3mm, 0.8mm height), pin-compatible with SO-8 but with 50% smaller footprint and thermal resistance of 4.1mW/°C above +70°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMV358IDR and AD8602ARMZ, the MAX4092AUA uniquely balances ultra-low quiescent current (165µA max), guaranteed 2000pF capacitive-load stability, and extended temperature range (-40°C to +125°C) - making it optimal for compact, battery-powered industrial sensors where reliability and power efficiency are co-primary constraints.

Availability

MAX4092AUA is available at Aetrix Electronics and suitable for portable medical devices, industrial 4–20mA transmitters, and battery-powered data loggers requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for MAX4092AUA 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) designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and medical applications.

The MAX409x family targets ultra-low-power, high-accuracy signal conditioning in space- and energy-constrained systems - specifically engineered for battery-operated instrumentation and harsh-environment sensor interfaces.

FAQ

What is the maximum capacitive load the MAX4092AUA can drive without external compensation?

The MAX4092AUA is unity-gain stable with up to 2000pF capacitive load, as confirmed in the Electrical Characteristics table and Typical Operating Characteristics (Figure 4). This capability eliminates isolation resistors in DAC output buffers and long-line drivers, preserving DC accuracy and reducing component count. The MAX4092AUA maintains phase margin >60° under this condition, ensuring monotonic step response without ringing.

Does the MAX4092AUA support true single-supply operation down to 2.7V?

Yes, the MAX4092AUA is fully specified for single-supply operation from 2.7V to 6V, with all key parameters - including input common-mode range (VEE − 0.05V to VCC + 0.05V), rail-to-rail output swing, and 165µA max quiescent current - guaranteed across this range. At 2.7V, it delivers >90% of full-scale output swing into 1kΩ, enabling direct interface with 3.3V microcontrollers and low-voltage ADCs.

How does the MAX4092AUA handle input voltages exceeding the supply rails?

The MAX4092AUA features Beyond-the-Rails™ inputs that accept common-mode voltages up to 50mV beyond VEE and VCC without phase reversal or latchup. Its dual-input-stage architecture (PNP + NPN) ensures continuous, predictable operation even during transient overvoltage events - critical for robustness in industrial sensor nodes exposed to ESD or inductive kickback.

What is the guaranteed input offset voltage specification for MAX4092AUA over temperature?

The MAX4092AUA guarantees ±3.5mV maximum input offset voltage across the full -40°C to +125°C operating range, as stated in the "ELECTRICAL CHARACTERISTICS (TA = TMIN to TMAX)" section. This tight specification ensures <0.1% gain error in 12-bit data acquisition systems without calibration, directly supporting high-accuracy applications like precision temperature measurement and strain gauge bridges.

Is the MAX4092AUA pin-compatible with other packages in the MAX409x family?

The MAX4092AUA in µMAX-8 is pin-compatible with the MAX4092ASA in SO-8 (same pin numbering and function), enabling drop-in replacement in existing layouts when board space or thermal performance requires package migration. However, it is not pin-compatible with SOT23-5 (MAX4091AUK-T) or TSSOP-14 (MAX4094AUD), as those serve single and quad variants with different pin counts and assignments.