Analog Devices Inc./Maxim Integrated MAX6071AAUT21+T

Overview

MAX6071AAUT21+T from Analog Devices is a precision 2.048V bandgap voltage reference IC in a 6-pin SOT23 package, delivering ±0.04% initial accuracy, 6ppm/°C max temperature drift (A grade), and ultra-low 4.8µV_P-P (0.1Hz–10Hz) noise-enabling high-accuracy ADC/DAC biasing in industrial process control systems.

For engineers reviewing the MAX6071AAUT21+T datasheet, MAX6071AAUT21+T pinout, MAX6071AAUT21+T application, or MAX6071AAUT21+T equivalent, key selection criteria include low-drift stability over –40°C to +125°C, 10mA sink/source capability, 230mV max dropout at 10mA, and dual-force/sense output architecture for remote load regulation.

Technical Context

The MAX6071AAUT21+T implements a bandgap-based reference core with separate force (OUTF) and sense (OUTS) outputs, enabling Kelvin sensing to reject PCB trace resistance errors. It features an enable input (EN) for power management and operates from 2.8V to 5.5V supply, with shutdown current as low as 0.6µA.

Unlike the MAX6070, the MAX6071 omits the FILTER pin and associated capacitor option, simplifying layout while retaining low-noise performance via internal optimization-making it suitable for space-constrained, high-stability applications where external filtering is unnecessary.

Key Specifications

Pinout & Package

Package: 6-pin SOT23 (U6+5/U6+5A), 2.9mm × 1.6mm footprint, surface-mount, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage reference applications.

Compared with REF5020AIDR and ADR4520BRZ, the MAX6071AAUT21+T offers the smallest footprint (SOT23), integrated enable, and Kelvin architecture-making it optimal for space-constrained, power-aware industrial sensors and portable instrumentation where trace resistance compensation is critical.

Availability

MAX6071AAUT21+T is available at Aetrix Electronics and suitable for high-accuracy industrial control, precision instrumentation, and high-resolution data acquisition systems requiring stable component supply across extended temperature ranges.

Supply support for MAX6071AAUT21+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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The MAX6071 belongs to Analog Devices' precision voltage reference product line, engineered specifically for applications demanding ultra-low noise, low drift, and robust operation in harsh environments-from factory automation to medical diagnostics.

FAQ

What is the output voltage tolerance of the MAX6071AAUT21+T at room temperature?

The MAX6071AAUT21+T has a guaranteed initial output voltage accuracy of ±0.04% at +25°C, corresponding to ±0.82mV deviation from its nominal 2.048V output. This specification is 100% production tested and ensures minimal gain error in 12-bit and higher-resolution data converters without system-level trimming.

Does the MAX6071AAUT21+T support Kelvin (force/sense) connections, and why does that matter?

Yes, the MAX6071AAUT21+T provides separate OUTF (force) and OUTS (sense) pins, enabling true 4-wire Kelvin referencing. This architecture compensates for voltage drop across PCB traces or connectors between the reference and load-critical for maintaining accuracy in high-current or long-trace applications like modular I/O systems where trace resistance can introduce >1mV error.

What is the maximum allowable supply voltage for the MAX6071AAUT21+T?

The MAX6071AAUT21+T operates with a supply voltage range of 2.8V to 5.5V. The absolute maximum rating for IN is +6V, but sustained operation above 5.5V risks parametric shift or reliability degradation. For designs using 5V rails, the 230mV max dropout ensures reliable regulation even with 4.77V minimum input under worst-case load and temperature conditions.

How does the enable (EN) pin function on the MAX6071AAUT21+T?

The EN pin on the MAX6071AAUT21+T is an active-high digital control input. When driven ≥0.7×VIN, the device powers up with 150µA quiescent current and regulates within 30µs. When pulled ≤0.3×VIN, it enters shutdown mode drawing ≤0.6µA. No external pull-up is required, and the pin accepts standard CMOS logic levels referenced to IN.

Is the MAX6071AAUT21+T qualified for automotive applications?

Yes, the MAX6071AAUT21+T is AEC-Q100 qualified (Grade 1: –40°C to +125°C), meaning it has passed stress tests for temperature cycling, humidity, mechanical shock, and ESD per automotive reliability standards. This qualification supports use in engine control units, battery management systems, and ADAS sensor modules where long-term stability under thermal stress is mandatory.