Analog Devices Inc./Maxim Integrated MAX6070BAUT33/V+T

Overview

MAX6070BAUT33/V+T from Analog Devices is a precision 3.3V series voltage reference IC with ultra-low 1/f noise (9.6µV_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.

For engineers reviewing the MAX6070BAUT33/V+T datasheet, MAX6070BAUT33/V+T pinout, MAX6070BAUT33/V+T application, or MAX6070BAUT33/V+T equivalent, key selection criteria include low-noise performance at 3.3V output, filter-enabled wideband noise suppression, SOT23-6 package compatibility, and AEC-Q100 qualification for automotive use cases.

Technical Context

The MAX6070BAUT33/V+T implements a bandgap-based series reference architecture with dual-output force-sense topology (OUTF/OUTS) to reject PCB trace resistance errors. It integrates a dedicated FILTER pin enabling external 0.1µF capacitor placement for >80dB ripple rejection at 60Hz and reduced high-frequency thermal noise.

Operating from 4.3V to 5.5V input with only 150µA quiescent current, it delivers ±10mA sourcing/sinking capability and maintains stability with capacitive loads from 0.1µF to 10µF - supporting precision current sources and sensor excitation circuits across –40°C to +125°C.

Key Specifications

Pinout & Package

Package: 6-pin SOT23 (package code U6+5A), footprint-compatible with JEDEC MO-178AB, thermal resistance θ_JA = 230°C/W on multilayer board.

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF3333AIDBVR and ADR3433ARJZ-R7, the MAX6070BAUT33/V+T uniquely combines AEC-Q100 qualification, force-sense topology, and user-configurable noise filtering - making it optimal for automotive and industrial systems requiring both precision and design flexibility.

Availability

MAX6070BAUT33/V+T is available at Aetrix Electronics and suitable for industrial process transmitters, precision weigh-scale front-ends, and automotive battery monitors requiring stable component supply with long-term lifecycle support.

Supply support for MAX6070BAUT33/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.

The MAX6070 series 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 - including factory automation and vehicle electrification systems.

FAQ

What is the maximum load current supported by the MAX6070BAUT33/V+T?

The MAX6070BAUT33/V+T supports ±10mA of load current - meaning it can source up to +10mA to a load and sink up to –10mA from a load. This capability enables direct driving of ADC reference inputs, op-amp bias networks, and precision current sources without external buffering. The device maintains specified accuracy and noise performance across this full range.

Does the MAX6070BAUT33/V+T require an external capacitor on the FILTER pin?

No, the FILTER pin on the MAX6070BAUT33/V+T is optional. When unused, it should be left floating. When high-frequency noise reduction is required - especially in wideband applications like fast SAR ADC sampling - a 0.1µF ceramic capacitor must be connected from FILTER to ground. This configuration reduces thermal noise by up to 3× in the 10Hz–10kHz band, as confirmed in the MAX6070BAUT33/V+T electrical characteristics table.

How does the force-sense (OUTF/OUTS) architecture improve accuracy in the MAX6070BAUT33/V+T?

The MAX6070BAUT33/V+T uses separate force (OUTF) and sense (OUTS) outputs to implement a Kelvin connection. OUTF delivers the regulated 3.3V, while OUTS connects to the load's ground point. The internal amplifier compares OUTS to the reference and adjusts OUTF to maintain precise voltage at the load - eliminating errors caused by voltage drop across PCB traces or connectors. This achieves <0.01% gain error even with 100mΩ path resistance.

Is the MAX6070BAUT33/V+T qualified for automotive applications?

Yes, the MAX6070BAUT33/V+T is AEC-Q100 qualified (Grade 1: –40°C to +125°C ambient). This qualification covers stress testing for temperature cycling, humidity, mechanical shock, and ESD - confirming suitability for automotive subsystems including battery management, powertrain sensors, and ADAS camera modules. The qualification applies specifically to the MAX6070BAUT33/V+T variant per the manufacturer's ordering information.

What is the minimum input voltage required for the MAX6070BAUT33/V+T to regulate at 3.3V output?

The MAX6070BAUT33/V+T requires a minimum input-to-output differential of 75mV at 10mA load (per Electrical Characteristics table for VOUT = 3.300V). Therefore, the absolute minimum input voltage is 3.375V. However, the datasheet specifies guaranteed operation from VIN = 4.3V to 5.5V - ensuring margin for line regulation, transient response, and temperature variation across the full –40°C to +125°C range.