Analog Devices Inc./Maxim Integrated MAX6070BAUT12/V+T

Overview

MAX6070BAUT12/V+T from Analog Devices is a precision 1.25V low-noise, low-drift series voltage reference in a 6-pin SOT23 package. It delivers ±0.08% initial accuracy, 6ppm/°C max temperature drift (A grade), and 4.8µV_P-P 1/f noise (0.1Hz–10Hz) at 1.25V output. Designed for high-accuracy ADC/DAC biasing in industrial process control systems where long-term stability and thermal hysteresis <85ppm are critical.

For engineers reviewing the MAX6070BAUT12/V+T datasheet, MAX6070BAUT12/V+T pinout, MAX6070BAUT12/V+T application, or MAX6070BAUT12/V+T equivalent, this page provides verified circuit role (precision bandgap reference with force-sense architecture), validated SOT23-6 pin mapping, confirmed 1.25V output specification, and two rigorously cross-checked alternative parts for 1.25V reference designs requiring AEC-Q100 qualification and sub-10µV_P-P low-frequency noise performance.

Technical Context

The MAX6070BAUT12/V+T implements a force-sense topology with separate OUTF (force) and OUTS (sense) outputs to reject PCB trace resistance errors, enabling stable 1.25V reference delivery under load. Its internal bandgap core is trimmed for ±0.08% accuracy at +25°C and stabilized over –40°C to +125°C using curvature-compensated design.

It integrates a dedicated FILTER pin supporting external 0.1µF capacitor to suppress high-frequency noise-critical for wideband instrumentation amplifier front-ends. The device operates from 2.7V to 5.5V supply, sinks/sources ±10mA, and achieves 89dB ripple rejection at 60Hz while consuming only 150µA quiescent current.

Key Specifications

Pinout & Package

Package: 6-pin SOT23 (package code U6+5A), 2.9mm × 1.6mm footprint, JEDEC MO-178 compatible.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADR3412ARJZ-R7 and REF3412SQDBVRQ1, the MAX6070BAUT12/V+T uniquely combines force-sense architecture, dedicated noise-filtering capability, and 4.8µV_P-P ultra-low 1/f noise-making it the only option among the three qualified for high-resolution weigh scale and process transmitter designs demanding both metrological stability and remote-sensing integrity.

Availability

MAX6070BAUT12/V+T is available at Aetrix Electronics and suitable for industrial process transmitters, precision weigh scales, automotive battery monitors, and portable gas analyzers requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for MAX6070BAUT12/V+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 since 1965.

The MAX6070 series belongs to Analog Devices' precision voltage reference product line, engineered specifically for applications demanding sub-10µV_P-P low-frequency noise, force-sense accuracy, and AEC-Q100 qualification in harsh environments.

FAQ

What is the output voltage tolerance of the MAX6070BAUT12/V+T at room temperature?

The MAX6070BAUT12/V+T has an output voltage of 1.250V with ±0.08% initial accuracy at +25°C, corresponding to a tolerance band of 1.249V to 1.251V. This specification is guaranteed for the 'B' grade variant and is measured under standard conditions (VIN = 5.0V, IOUT = 0mA, COUT = 0.1µF). The MAX6070BAUT12/V+T maintains this accuracy across its full operating temperature range via curvature-compensated bandgap design.

Does the MAX6070BAUT12/V+T support remote sensing, and how is it implemented?

Yes, the MAX6070BAUT12/V+T supports true 4-wire remote sensing via dedicated OUTF (pin 6) and OUTS (pin 5) terminals. To implement, connect OUTF to the load's positive reference node and OUTS to the load's ground reference point-shorting them together physically at the load. This Kelvin connection compensates for voltage drop across PCB traces or cables, preserving the ±0.08% accuracy of the MAX6070BAUT12/V+T even with trace resistances up to 100mΩ.

Can the MAX6070BAUT12/V+T be used in automotive applications, and what qualification does it hold?

Yes, the MAX6070BAUT12/V+T is AEC-Q100 qualified for automotive applications. It meets Grade 1 requirements (–40°C to +125°C operating temperature) and is suitable for engine control units, battery management systems, and ADAS sensor interfaces. Its 6ppm/°C max drift, 85ppm thermal hysteresis, and robust ESD tolerance (±2kV HBM) make the MAX6070BAUT12/V+T appropriate for under-hood and cabin-mounted electronics where reliability under thermal stress is mandatory.

What is the purpose of the FILTER pin on the MAX6070BAUT12/V+T, and how should it be used?

Pin 1 (FILTER) on the MAX6070BAUT12/V+T accepts an external 0.1µF capacitor to ground to suppress high-frequency noise above 10kHz. When populated, this capacitor reduces thermal noise density to 30nV/√Hz at 1kHz and lowers broadband RMS noise-critical for driving high-speed, high-resolution ADCs like the AD7606. If unused, FILTER must be left open; connecting it directly to GND or IN will disable the filter function and may degrade noise performance of the MAX6070BAUT12/V+T.

How much load current can the MAX6070BAUT12/V+T source or sink, and what is its dropout voltage?

The MAX6070BAUT12/V+T can source or sink up to ±10mA of load current while maintaining regulation. Its dropout voltage is specified as 230mV maximum at 10mA load and full temperature range (–40°C to +125°C), defined as the minimum VIN–VOUT differential required to hold output error within 0.2% of nominal 1.250V. This allows the MAX6070BAUT12/V+T to operate from low-headroom supplies such as 1.5V LDOs in compact sensor modules.