Analog Devices Inc./Maxim Integrated MAX40075AUT+T

Overview

MAX40075AUT+T from Maxim Integrated is a unity-gain stable, low-noise, low-input-bias-current operational amplifier in a 6-pin SOT23 package, operating from +2.7V to +5.5V single supply with 10MHz gain-bandwidth product, 4.2nV/√Hz input voltage-noise density at 30kHz, and rail-to-rail output swing - ideal for precision ADC buffering and sensor signal conditioning in automotive powertrain and medical instrumentation.

For engineers reviewing the MAX40075AUT+T datasheet, MAX40075AUT+T pinout, MAX40075AUT+T application, or MAX40075AUT+T equivalent, this page delivers verified electrical specs, validated pin functions, confirmed thermal and noise performance, and real-world design context for low-distortion, ground-sensing analog front-ends.

Technical Context

The MAX40075AUT+T employs BiCMOS process technology to achieve <1pA typical input bias current and ultra-low 0.00035% THD+N at 1kHz into 1kΩ, enabling high-fidelity amplification of high-impedance sources like piezoelectric transducers and strain gauges. Its input common-mode range includes ground (–0.2V to VDD–1.5V), supporting low-side current sensing without phase reversal.

It features true rail-to-rail output drive into 1kΩ loads, delivering ±20mA output current while maintaining DC accuracy, and integrates active low-power shutdown (≤1μA) with active-low SHDN control. The device is AEC-Q100 qualified for automotive applications and guaranteed stable with capacitive loads up to 50pF.

Key Specifications

Pinout & Package

Package: 6-pin SOT23 (U6+1), RoHS-compliant, footprint per land pattern 90-0175. Thermal resistance θJA = 115°C/W (four-layer board).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise, unity-gain stable op amp applications.

Compared with OPA320AIDBVR and ADA4898-1ARMZ, the MAX40075AUT+T uniquely balances ultra-low noise (4.2nV/√Hz), automotive qualification, integrated shutdown, and unity-gain stability in a space-constrained SOT23 package - making it optimal for cost-sensitive, thermally demanding, and safety-aware embedded analog front-ends.

Availability

MAX40075AUT+T is available at Aetrix Electronics and suitable for automotive powertrain monitoring, medical instrumentation signal chains, and industrial sensor interface designs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX40075AUT+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 precision analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.

The MAX40075AUT+T belongs to Maxim's low-noise, low-bias op amp family targeting high-fidelity signal conditioning in AEC-Q100-compliant systems - specifically engineered for ground-sensing, rail-to-rail operation in 2.7V–5.5V single-supply environments.

FAQ

What is the maximum capacitive load the MAX40075AUT+T can drive while remaining stable?

The MAX40075AUT+T is guaranteed stable with capacitive loads up to 50pF across all operating conditions, including full temperature range and supply voltages. This specification eliminates the need for external isolation resistors or compensation networks when driving typical ADC input capacitance or PCB trace capacitance, simplifying layout and preserving bandwidth integrity in precision signal paths.

Does the MAX40075AUT+T support true rail-to-rail input operation?

No - the MAX40075AUT+T features rail-to-rail *output* swing but has an input common-mode voltage range extending from –0.2V to VDD–1.5V. This ground-sensing capability allows the IN+ and IN– pins to operate at or slightly below ground potential, making it suitable for low-side current sensing, though the inputs cannot swing fully to VDD.

Is the MAX40075AUT+T pin-compatible with other op amps in the same SOT23-6 package?

No - the MAX40075AUT+T uses a proprietary pinout (VSS, IN+, OUT, IN–, SHDN, VDD) that differs from industry-standard SOT23-6 op amp configurations. Substitution requires verification of pin mapping, especially for SHDN and supply connections, to avoid functional failure or damage.

What is the typical input offset voltage drift over temperature for the MAX40075AUT+T?

The MAX40075AUT+T exhibits an input offset voltage drift of 0.3μV/°C to 3μV/°C over the full –40°C to +125°C operating range. This low drift ensures minimal calibration drift in precision sensor interfaces and maintains accuracy in automotive and industrial applications where ambient temperature varies widely.

Can the MAX40075AUT+T be used with dual supplies?

Yes - the MAX40075AUT+T operates from dual supplies ranging from ±1.35V to ±2.75V. When using dual supplies, both VDD and VSS must be bypassed with 0.1μF ceramic capacitors to ground, and the SHDN pin must be referenced to the appropriate logic supply (e.g., pulled to +VS for enable). Input common-mode and output swing specifications scale accordingly.