Analog Devices Inc./Maxim Integrated MAX406AESA+

Overview

MAX406AESA+ from Maxim Integrated is a single, rail-to-rail input/output, micropower operational amplifier optimized for single-supply operation at 2.7V to 11V. It delivers 1.2µA max supply current, 150kHz gain-bandwidth product, and 1mV max input offset voltage over -40°C to +85°C, enabling precision sensing in battery-powered industrial monitoring systems.

For engineers reviewing the MAX406AESA+ datasheet, MAX406AESA+ pinout, MAX406AESA+ application, or MAX406AESA+ equivalent, key selection criteria include ultra-low quiescent current, rail-to-rail I/O swing, guaranteed performance across extended temperature, and SO-8 package compatibility with space-constrained PCB layouts.

Technical Context

The MAX406AESA+ employs a CMOS input stage with rail-to-rail input common-mode range extending beyond the supply rails by 100mV, and rail-to-rail output swing within 10mV of each rail at 100kΩ load. Its 150kHz GBW supports stable unity-gain operation with capacitive loads up to 100pF.

Designed for single-supply systems, the device features internal ESD protection (±2kV HBM), operates down to 2.7V, and maintains 1.2µA max ICC across full temperature range - critical for energy harvesting and long-life sensor nodes where leakage and self-heating must be minimized.

Key Specifications

Pinout & Package

MAX406AESA+ is housed in an 8-pin SO (Small Outline) package per package code S8-2, with standard 1.27mm pitch and JEDEC MS-012AC outline.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar micropower, single-supply op amp applications.

Compared with TLV2461IDBVR and LTC1540CS5#TRMPBF, the MAX406AESA+ uniquely balances sub-2µA quiescent current, 150kHz bandwidth, and 1mV offset in an industry-standard SO-8 footprint - making it optimal for cost-sensitive, space-constrained, wide-temperature industrial sensor nodes requiring both precision and longevity.

Availability

MAX406AESA+ is available at Aetrix Electronics and suitable for battery-powered sensor nodes, industrial process monitors, and portable medical diagnostics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX406AESA+ 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 industrial, medical, communications, and consumer applications.

The MAX406AESA+ belongs to the MAX406/MAX407/MAX409 family of micropower, single-supply op amps engineered specifically for ultra-low-power, high-accuracy signal conditioning in harsh-environment sensor systems.

FAQ

What is the maximum supply voltage rating for MAX406AESA+?

The MAX406AESA+ supports a maximum supply voltage of 11V across its full operating temperature range of -40°C to +85°C. Operation above this voltage risks permanent damage to the internal CMOS input stage and output transistors. For reliable long-term use, maintain V_DD – V_SS ≤ 11V and include a 0.1µF ceramic bypass capacitor between Pins 7 (V_DD) and 4 (V_SS). The MAX406AESA+ datasheet specifies absolute maximum ratings separately from recommended operating conditions.

Does MAX406AESA+ support rail-to-rail output swing with capacitive loads?

Yes, the MAX406AESA+ delivers rail-to-rail output swing within 10mV of each rail into resistive loads ≥100kΩ. However, with capacitive loads >100pF, phase margin degrades and overshoot may occur; the MAX406AESA+ datasheet recommends limiting capacitive loads to ≤100pF or adding a series isolation resistor (e.g., 100Ω) between the output and capacitance to maintain stability.

What is the purpose of the NC pins on MAX406AESA+?

The MAX406AESA+ has three no-connect (NC) pins: Pins 5, 6, and 8. These pins are not bonded internally and must remain unconnected on the PCB. Routing traces to or placing solder pads on these pins may introduce parasitic coupling or contamination risk. The MAX406AESA+ SO-8 package uses these positions to maintain mechanical symmetry and thermal uniformity - they serve no electrical function and are explicitly excluded from the pinout diagram in the official datasheet.

How does the input offset voltage of MAX406AESA+ vary over temperature?

The MAX406AESA+ guarantees a maximum input offset voltage of 1mV over its full operating range of -40°C to +85°C. Its typical drift is ±0.5µV/°C, resulting in ≤2µV total change across the entire temperature span. This low drift, combined with the 1mV max specification, ensures predictable DC accuracy in uncalibrated industrial sensor interfaces where thermal gradients are present - a key differentiator versus general-purpose op amps with higher V_OS drift.

Is MAX406AESA+ pin-compatible with other devices in the MAX406 family?

Yes, all MAX406 variants - including MAX406ACSA, MAX406BCSA, MAX406AEPA, and MAX406AESA+ - share identical pinouts and electrical specifications except for temperature grade and package type. The MAX406AESA+ uses the same SO-8 footprint and terminal assignment as MAX406ACSA and MAX406BCSA, allowing direct substitution in existing SO-8 layouts without PCB revision, provided the extended -40°C to +85°C temperature range meets system requirements.