Analog Devices Inc./Maxim Integrated MAX4462TEUT+T

Overview

The MAX4462TEUT+T from Maxim Integrated is a precision rail-to-rail output instrumentation amplifier with fixed gain of 10 V/V, reference input (REF) pin for bipolar operation in single-supply systems, ±0.1% gain accuracy, 100 µV typical input offset voltage, and 2.5 MHz gain-bandwidth product - used in low-side current sensing, strain-gauge interfaces, and battery-powered medical equipment.

For engineers reviewing the MAX4462TEUT+T datasheet, MAX4462TEUT+T pinout, MAX4462TEUT+T application, or MAX4462TEUT+T equivalent, this page delivers verified circuit role (precision differential-to-single-ended converter with REF-referenced output), package mapping (6-pin SOT23), thermal and supply range (–40°C to +85°C, 2.85V–5.25V), noise performance (18 nV/√Hz), and validated alternatives for unipolar/bipolar signal conditioning.

Technical Context

The MAX4462TEUT+T implements Maxim's proprietary indirect current-feedback architecture, converting differential input voltage to current, then subtracting it from a feedback-derived current to drive a high-gain loop amplifier with Class AB output stage. This enables ground-sensing capability while maintaining ultra-low 1 pA typical input bias current and enhanced CMRR.

Unlike traditional three-op-amp IAs, the MAX4462TEUT+T uses a REF pin to set output DC level for zero differential input - enabling true bipolar signal handling (±100 mV input at G = 10) in single-supply configurations. Its input common-mode range extends from VSS – 0.1 V to VDD – 1.7 V, and REF input range matches (VSS + 0.1 V to VDD – 1.7 V).

Key Specifications

Pinout & Package

MAX4462TEUT+T is housed in a 6-pin SOT23 package (JEDEC MO-178AA), with exposed pad connected to VSS for thermal and noise performance. Pin 1 = OUT, Pin 2 = VSS, Pin 3 = IN+, Pin 4 = IN−, Pin 5 = VDD, Pin 6 = REF.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar instrumentation amplifier applications.

Compared with INA333AIDBVR and AD8221ARMZ, the MAX4462TEUT+T uniquely integrates a dedicated REF pin for direct bipolar output referencing - eliminating external components while delivering higher bandwidth (2.5 MHz vs. ≤825 kHz) and lower input bias current (1 pA vs. ≥0.3 µA), making it optimal for compact, low-power, single-supply sensor interfaces.

Availability

MAX4462TEUT+T is available at Aetrix Electronics and suitable for industrial process control, precision current sensing, and battery-powered medical equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX4462TEUT+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) designs high-performance analog and mixed-signal ICs for demanding industrial, automotive, and medical applications.

The MAX4462TEUT+T belongs to Maxim's precision instrumentation amplifier product line, engineered specifically for low-power, single-supply sensor signal conditioning with integrated REF-based bipolar output capability.

FAQ

What is the function of the REF pin on the MAX4462TEUT+T?

The REF pin on the MAX4462TEUT+T sets the output DC level for zero differential input voltage, enabling true bipolar output swing (e.g., ±1 V for ±100 mV input at G = 10) in single-supply systems. It must be driven by a low-impedance source between VSS + 0.1 V and VDD – 1.7 V; optimal performance occurs when REF = VDD/2. This eliminates the need for external level-shifting circuitry in the MAX4462TEUT+T design.

Does the MAX4462TEUT+T support dual-supply operation?

Yes, the MAX4462TEUT+T supports dual-supply operation with VDD up to +2.6 V and VSS down to –2.6 V. In this configuration, the REF pin should be connected to ground to establish the zero-differential-output reference point. The input common-mode range remains VSS – 0.1 V to VDD – 1.7 V, and the REF input range is similarly extended - enabling symmetric bipolar signal processing without modification to the MAX4462TEUT+T circuit layout.

What is the maximum input differential voltage for the MAX4462TEUT+T at G = 10?

At G = 10, the MAX4462TEUT+T is specified for input differential voltages from –100 mV to +100 mV under standard test conditions (VDD = 5 V, VREF = VDD/2, RL = 100 kΩ). This range ensures guaranteed accuracy (≤0.15% nonlinearity, ±0.5% gain error) and full rail-to-rail output swing. Larger differential inputs may be tolerated but degrade linearity and increase offset drift - verified in the MAX4462TEUT+T electrical characteristics table.

How does the MAX4462TEUT+T achieve ultra-low input bias current?

The MAX4462TEUT+T achieves 1 pA typical input bias current through its proprietary CMOS input stage, where IN+ and IN− connect directly to MOS transistor gates with negligible leakage. This architecture avoids parasitic junctions found in bipolar-input amplifiers, preserving signal integrity in high-impedance sensor interfaces. The MAX4462TEUT+T datasheet confirms this value is guaranteed by design and functionally screened during production - critical for strain gauges and electrochemical sensors.

Can the MAX4462TEUT+T replace the MAX4461TEUT-T in an existing design?

No - the MAX4462TEUT+T and MAX4461TEUT-T are not drop-in replacements. The MAX4461TEUT-T has a SHDN pin and ground-referenced output, while the MAX4462TEUT+T has a REF pin and bipolar-capable output. Swapping them requires redesigning the reference network, updating PCB routing for Pin 6 (SHDN → REF), and recalibrating offset/linearity. The MAX4462TEUT+T is intended for new bipolar-signal designs, not retrofits of unipolar MAX4461TEUT-T systems.