Analog Devices Inc./Maxim Integrated MAX6033BAUT25+T

Overview

MAX6033BAUT25+T from Maxim Integrated is a 2.5V ultra-high-precision series voltage reference with ±0.20% initial accuracy, 15ppm/°C max temperature coefficient over –40°C to +125°C, 200mV max dropout voltage at 1mA load, and 40µA typical quiescent current. It delivers stable, low-noise reference performance for high-resolution data converters in automotive and industrial systems.

For engineers reviewing the MAX6033BAUT25+T datasheet, MAX6033BAUT25+T pinout, MAX6033BAUT25+T application, or MAX6033BAUT25+T equivalent, key selection criteria include output accuracy vs. temperature drift trade-offs, capacitive load stability up to 100µF, dropout behavior under 10mA load, and SOT23-6 package compatibility with space-constrained PCB layouts.

Technical Context

The MAX6033BAUT25+T implements a bandgap-based series voltage reference architecture with laser-trimmed thin-film resistors and post-package trimming. Its dual-output (OUTF/OUTS) force-sense topology actively compensates for trace resistance and load-induced voltage drop, enabling precision regulation independent of PCB layout parasitics.

It operates across 2.7V to 12.6V input supply range and maintains 0.001mV/mA load regulation at +25°C. The device achieves 16µV_P-P (0.1Hz–10Hz) noise at 2.5V output and settles within 500µs to ±0.01% of final value during turn-on - critical for fast-cycling measurement systems.

Key Specifications

Pinout & Package

The MAX6033BAUT25+T is housed in a RoHS-compliant 6-pin SOT23 package (package code U6F+6), with 1.6mm × 2.9mm footprint and 1.1mm height - optimized for automated assembly and thermal dissipation on single-layer boards (θ_JA = 185.5°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6033AAUT25-T, the MAX6033BAUT25+T trades initial accuracy for cost efficiency while retaining identical SOT23-6 footprint and force-sense functionality; versus REF3425DRVR, it offers superior layout-insensitive regulation via OUTF/OUTS but with higher tempco and slightly higher noise.

Availability

MAX6033BAUT25+T is available at Aetrix Electronics and suitable for automotive sensor modules, portable test equipment, and industrial process controllers requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for MAX6033BAUT25+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 and mixed-signal ICs for demanding industrial, automotive, and communications applications - emphasizing low-power, high-accuracy, and robust reliability.

The MAX6033BAUT25+T belongs to Maxim's ultra-high-precision series voltage reference product line, engineered specifically for applications where reference stability, low noise, and force-sense accuracy are critical to system-level measurement integrity.

FAQ

What is the maximum capacitive load the MAX6033BAUT25+T can drive while remaining stable?

The MAX6033BAUT25+T is stable with output capacitive loads ranging from 0.1µF to 100µF, as confirmed in the datasheet Applications Information section. This wide range supports both high-frequency decoupling (e.g., 0.1µF ceramic) and bulk energy storage (e.g., 47µF tantalum) without requiring external compensation. Stability holds across the full –40°C to +125°C temperature range and 0–15mA load current.

Does the MAX6033BAUT25+T require an input bypass capacitor?

The MAX6033BAUT25+T does not require an input bypass capacitor for basic stability, but a 0.1µF ceramic capacitor placed adjacent to the IN pin is recommended for optimal line-transient performance, as stated in the Applications Information section. Without it, the device remains functional but exhibits increased susceptibility to supply ripple and step changes - particularly critical in noisy automotive or industrial power environments.

How does the OUTF and OUTS pin configuration improve accuracy in the MAX6033BAUT25+T?

The MAX6033BAUT25+T uses a force-sense (Kelvin) configuration: OUTF delivers reference current to the load, while OUTS senses voltage directly at the load point and feeds back to regulate OUTF. This eliminates errors caused by voltage drop across PCB traces or interconnects. For example, with 100mΩ trace resistance and 10mA load, a standard single-output reference would incur 1mV error - whereas the MAX6033BAUT25+T maintains regulation at the load node, preserving its ±0.20% accuracy specification.

What is the dropout voltage specification for the MAX6033BAUT25+T at 10mA load and +125°C?

At +125°C and 10mA load, the MAX6033BAUT25+T has a maximum dropout voltage of 0.5V, as specified in the Electrical Characteristics table under "Dropout Voltage" conditions. This means the input voltage must be ≥3.0V (2.5V + 0.5V) to maintain regulation. At room temperature and same load, dropout is ≤0.4V - confirming design margin for worst-case thermal and current conditions.

Is the MAX6033BAUT25+T suitable for use with 16-bit or higher-resolution ADCs?

Yes, the MAX6033BAUT25+T is explicitly designed for high-resolution data converters. Its 16µV_P-P (0.1–10Hz) output noise contributes less than 0.1 LSB error to a 16-bit ADC with 2.5V full-scale range (LSB = 38.1µV), and its ±0.20% initial accuracy aligns with typical 16-bit INL specifications. The datasheet General Description confirms suitability for "high-resolution ADCs or DACs," and the low 0.001mV/mA load regulation prevents code-dependent errors during dynamic conversion sequences.