Analog Devices Inc./Maxim Integrated MAX6070DAUT25/V+

Overview

MAX6070DAUT25/V+ from Analog Devices is a precision 2.5V series voltage reference IC with ultra-low 1/f noise (4.8µV_P-P, 0.1Hz–10Hz), 6ppm/°C max temperature drift (A-grade), and ±0.04% initial accuracy - designed for high-resolution ADC/DAC biasing in industrial process control systems requiring stable, low-drift excitation.

For engineers reviewing the MAX6070DAUT25/V+ datasheet, MAX6070DAUT25/V+ pinout, MAX6070DAUT25/V+ application, or MAX6070DAUT25/V+ equivalent, key selection criteria include its integrated noise-filter option (FILTER pin), 10mA sink/source capability, 2.8V to 5.0V input range, and AEC-Q100 qualification for automotive sensor signal conditioning.

Technical Context

The MAX6070DAUT25/V+ implements a bandgap-based series reference architecture with force-sense output topology (OUTF/OUTS) enabling remote sensing to compensate for PCB trace resistance. Its dedicated FILTER pin accepts an external 0.1µF capacitor to suppress high-frequency noise above 10Hz, reducing thermal noise to 3.0µV_RMS (10Hz–10kHz).

It features active enable control (EN pin), shutdown current of ≤6µA, and operates across –40°C to +125°C with guaranteed 2.5V output stability under 10mA load variations and 230mV dropout at full load - supporting precision current sources and closed-loop transducer interfaces.

Key Specifications

Pinout & Package

MAX6070DAUT25/V+ uses a 6-pin SOT23 package (package code U6+5A, outline 21-0058), with exposed pad for thermal performance. Pin 1 is FILTER, Pin 2 is GNDF, Pin 3 is EN, Pin 4 is IN, Pin 5 is OUTS, Pin 6 is OUTF.

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF5025IDR and ADR4525BRZ, MAX6070DAUT25/V+ uniquely integrates force-sense outputs, a dedicated noise-filter pin, and enable control in a space-constrained SOT23 - making it optimal for compact, noise-sensitive, and power-aware industrial and automotive designs where layout-induced errors and EMI must be minimized at the component level.

Availability

MAX6070DAUT25/V+ is available at Aetrix Electronics and suitable for high-accuracy industrial and process control, precision instrumentation, and automotive sensor signal conditioning requiring stable component supply across extended temperature ranges.

Supply support for MAX6070DAUT25/V+ 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 MAX6070 series belongs to Analog Devices' precision voltage reference product line, engineered specifically for applications demanding ultra-low noise, low drift, and force-sense accuracy in harsh thermal and electrical environments.

FAQ

What is the maximum load current supported by the MAX6070DAUT25/V+?

The MAX6070DAUT25/V+ supports ±10mA of load current - meaning it can both source up to +10mA (e.g., to bias op-amps or ADC reference inputs) and sink up to –10mA (e.g., into current-sink DACs or transducer bridges). This bidirectional capability eliminates the need for external buffer amplifiers in many precision analog front-ends, and the device maintains 2.5V output accuracy within ±0.04% over this full range at temperatures from –40°C to +125°C.

How does the FILTER pin on the MAX6070DAUT25/V+ reduce noise?

The FILTER pin on the MAX6070DAUT25/V+ accepts an external 0.1µF capacitor to ground, forming a low-pass filter that suppresses high-frequency thermal noise. When enabled, this reduces broadband noise (10Hz–10kHz) from 6.0µV_RMS to 3.0µV_RMS - a 50% improvement - while preserving the ultra-low 4.8µV_P-P 1/f noise (0.1Hz–10Hz). This dual-noise optimization is critical for applications like high-speed data acquisition where both flicker and thermal noise degrade SNR.

Can the MAX6070DAUT25/V+ be used in automotive applications?

Yes, the MAX6070DAUT25/V+ is AEC-Q100 qualified for automotive Grade 1 (–40°C to +125°C), with validated reliability including HTOL, TC, and ESD testing. Its 84dB 60Hz ripple rejection, force-sense outputs to reject PCB IR drop, and FILTER pin for conducted EMI suppression make it suitable for engine control, exhaust gas sensors, and ADAS radar signal conditioning - where reference stability directly impacts functional safety compliance.

What is the purpose of the separate GNDF and OUTS pins on the MAX6070DAUT25/V+?

GNDF (Pin 2) is the dedicated ground return for the internal bandgap reference core, while OUTS (Pin 5) is the Kelvin sense output referenced to the load's local ground. This separation isolates noise-sensitive reference circuitry from power-ground currents, and the force-sense topology (OUTF/OUTS) actively compensates for voltage drop across PCB traces - enabling sub-0.01% gain accuracy even with 100mΩ interconnect resistance, which is essential for 24-bit measurement systems.

What is the minimum input voltage required for the MAX6070DAUT25/V+ to regulate at 2.5V?

The MAX6070DAUT25/V+ requires a minimum input voltage of 2.8V to maintain 2.5V output regulation under full 10mA load, based on its 230mV maximum dropout voltage specification at TMIN to TMAX. At room temperature and light loads, regulation is guaranteed down to 2.7V per datasheet limits, but for robust industrial operation across –40°C to +125°C, design margins should assume ≥2.8V supply - making it compatible with 3.3V LDOs or single-cell Li-ion systems with appropriate undervoltage protection.