Analog Devices Inc./Maxim Integrated MAX4462HEUT+T

Overview

MAX4462HEUT+T from Maxim Integrated is a fixed-gain (G = 100), rail-to-rail output instrumentation amplifier optimized for precision bipolar signal conditioning in single-supply systems. It features ±0.1% gain accuracy, 100µV input offset voltage, 1pA typical input bias current, 2.5MHz gain-bandwidth product, and REF pin for external output reference setting-enabling true bipolar operation in battery-powered medical sensors and strain-gauge interfaces.

For engineers reviewing the MAX4462HEUT+T datasheet, MAX4462HEUT+T pinout, MAX4462HEUT+T application, or MAX4462HEUT+T equivalent, key selection criteria include its REF-controlled zero-differential output level, ground-sensing input capability down to VSS − 0.1V, guaranteed ±0.1% gain error at G = 100, and compatibility with 2.85V–5.25V single supplies or ±2.6V dual supplies.

Technical Context

The MAX4462HEUT+T implements Maxim's proprietary indirect current-feedback architecture, converting differential input voltage to current, then subtracting a precision feedback current derived from output voltage divided by gain. This enables simultaneous ground-sensing inputs and ultra-low input bias current (1pA typ).

Unlike traditional three-op-amp IAs, it achieves high CMRR (90–120dB) and PSRR (80–100dB) while supporting bipolar output swing via the REF pin-set externally to define zero-differential output voltage across VSS + 0.1V to VDD − 1.7V-with optimal performance at VREF = VDD/2.

Key Specifications

Pinout & Package

MAX4462HEUT+T is housed in a space-saving 6-pin SOT23 package (JEDEC MO-178AA), with exposed paddle connected to VSS for thermal and noise performance. Pin 1 is OUT; Pin 2 is VSS; Pin 3 is IN+; Pin 4 is IN−; Pin 5 is VDD; Pin 6 is REF.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD8429ARMZ and LTC6363IMS8-100#PBF, the MAX4462HEUT+T offers the lowest quiescent current (700µA) and smallest footprint (SOT23-6), making it optimal for space-constrained, battery-sensitive instrumentation where G = 100 and 25kHz bandwidth suffice.

Availability

MAX4462HEUT+T is available at Aetrix Electronics and suitable for industrial process control, battery-powered medical equipment, and precision transducer interface applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature.

Supply support for MAX4462HEUT+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 precision sensing, power management, and communication applications.

The MAX4462HEUT+T belongs to Maxim's precision instrumentation amplifier family, engineered specifically for low-power, single-supply systems requiring bipolar signal handling, ground-sensing inputs, and factory-trimmed gain accuracy in miniature packages.

FAQ

What is the function of the REF pin on the MAX4462HEUT+T?

The REF pin on the MAX4462HEUT+T sets the output DC level for zero differential input voltage, enabling true bipolar operation in single-supply systems. When a differential input is zero, the output equals the voltage applied to REF. For maximum output swing, REF should be connected to VDD/2. The REF input range is specified from VSS + 0.1V to VDD − 1.7V, and the device maintains ≥85dB REF rejection over this range. This functionality is unique to the MAX4462HEUT+T within the MAX446x family.

Does the MAX4462HEUT+T support dual-supply operation?

Yes, the MAX4462HEUT+T supports dual-supply operation with VDD up to +2.6V and VSS down to −2.6V. In this configuration, the REF pin is typically tied to ground to establish a zero-output reference for bipolar signals. The input common-mode range extends from VSS − 0.1V to VDD − 1.7V, and the REF input range remains VSS + 0.1V to VDD − 1.7V. Dual-supply use preserves all key specifications including ±0.1% gain accuracy and 100µV offset, as confirmed in the MAX4462 Electrical Characteristics tables.

What is the guaranteed gain accuracy of the MAX4462HEUT+T at G = 100?

The MAX4462HEUT+T is factory-trimmed to deliver ±0.1% gain accuracy at G = 100 over temperature (−40°C to +85°C), as explicitly stated in the Selector Guide and confirmed in the Electrical Characteristics tables for MAX4462_EUT/MAX4462_ETT devices. This specification applies under RL = 10kΩ load conditions and is independent of external resistor tolerances-unlike adjustable-gain amplifiers. The H-suffix denotes the G = 100 variant, and the ±0.1% tolerance is guaranteed, not typical.

Can the MAX4462HEUT+T be used with a 2.85V supply?

Yes, the MAX4462HEUT+T is fully specified for operation from 2.85V to 5.25V single supply. At 2.85V, it maintains rail-to-rail output swing (with reduced VOL/VOH margins), 700µA typical supply current, and retains all key AC/DC specifications including 2.5MHz GBWP and ±0.1% gain accuracy. The input common-mode range adjusts accordingly (VSS − 0.1V to VDD − 1.7V = −0.1V to +1.15V), and REF must remain within VSS + 0.1V to VDD − 1.7V (i.e., +0.1V to +1.15V).

How does the MAX4462HEUT+T differ from the MAX4461HEUT+T?

The MAX4462HEUT+T replaces the SHDN pin of the MAX4461HEUT+T with a REF pin, enabling external output reference setting for bipolar operation, whereas the MAX4461HEUT+T has logic-controlled shutdown and ground-referenced output. Both share identical G = 100 gain accuracy (±0.1%), 100µV offset, and 2.5MHz GBWP, but the MAX4462HEUT+T lacks shutdown capability and supports dual-supply operation. Their pinouts differ: Pin 6 is REF (not SHDN), and Pin 2 is VSS (not GND), requiring distinct PCB layouts.