Analog Devices Inc./Maxim Integrated MAX6129AEUK30-T

Overview

MAX6129AEUK30-T from Maxim Integrated is a micropower, low-dropout series-mode bandgap voltage reference delivering a precise 3.000V output with ±0.4% initial accuracy and 40ppm/°C max temperature coefficient in a 5-pin SOT23 package. It sources up to 4mA and sinks up to 1mA, operates from 3.2V to 12.6V supply, draws only 6.75µA (max) quiescent current, and maintains stability with capacitive loads up to 10µF - ideal for high-accuracy, battery-powered precision data acquisition systems.

For engineers reviewing the MAX6129AEUK30-T datasheet, MAX6129AEUK30-T pinout, MAX6129AEUK30-T application, or MAX6129AEUK30-T equivalent, this page delivers verified electrical parameters, validated SOT23-5 terminal mapping, confirmed load/source/sink behavior, thermal hysteresis (140ppm), and real-world transient response metrics - all specific to the A-grade 3.0V variant.

Technical Context

The MAX6129AEUK30-T employs a series-mode bandgap architecture with internal compensation, eliminating external capacitors while ensuring stability across 0–10µF sourcing and 0–0.4µF sinking loads. Its BiCMOS process enables ultra-low 6.75µA supply current with only 1.5µA/V variation over 3.2–12.6V input range.

Designed for precision analog signal chains, it achieves 0.1% turn-on settling in 775µs (typical), supports 140–200mV dropout at 4mA load, and delivers 3.000V output with <0.1% line regulation (30µV/V max) and <0.6µV/µA load regulation under sourcing conditions.

Key Specifications

Pinout & Package

MAX6129AEUK30-T is housed in a 5-pin SOT23-5 surface-mount package (JEDEC MO-178AA), occupying 70% less PCB area than SO-8 alternatives. Pin 1 is IN (input supply), Pin 2 is GND, Pins 3 and 4 are internally connected no-connects (may be left floating or tied to ground), and Pin 5 is OUT (3.000V reference output).

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF3030AIDBZR and ADR3430ARJZ-R7, the MAX6129AEUK30-T uniquely balances ultra-low 6.75µA supply current, 4mA sourcing + 1mA sinking, and capacitor-free 10µF load stability - making it the only option suitable for long-life, dynamically loaded, space-constrained portable instrumentation.

Availability

MAX6129AEUK30-T is available at Aetrix Electronics and suitable for battery-powered systems, handheld instruments, precision power supplies, A/D and D/A converters requiring stable component supply with guaranteed long-term availability and traceable lot-level documentation.

Supply support for MAX6129AEUK30-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, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.

The MAX6129 family delivers ultra-low-power, high-accuracy voltage references optimized for portable and battery-operated precision measurement systems where board space, power budget, and thermal stability are critical constraints.

FAQ

What is the maximum load current the MAX6129AEUK30-T can source and sink?

The MAX6129AEUK30-T can source up to 4mA and sink up to 1mA of load current while maintaining output regulation within specifications. This dual-direction capability enables direct interfacing with both ADC reference inputs and op-amp bias networks without external buffering. The 4mA sourcing limit is validated at 3.2V input and 3.0V output with 200mV dropout margin, and the 1mA sinking is specified across the full –40°C to +85°C temperature range. These values are explicitly defined in the Electrical Characteristics table for MAX6129_30.

Does the MAX6129AEUK30-T require external capacitors for stability?

No, the MAX6129AEUK30-T does not require external capacitors for stability due to its internal compensation capacitor. It remains stable driving capacitive loads from 0 to 10µF when sourcing current and from 0 to 0.4µF when sinking current. While an optional 0.1µF ceramic capacitor on the IN pin improves transient response, and an output capacitor may reduce overshoot during load steps, neither is necessary for basic operation - a key advantage for space-constrained designs. This behavior is confirmed in the Applications Information section and Typical Operating Characteristics.

What is the supply voltage range for the MAX6129AEUK30-T?

The MAX6129AEUK30-T operates from a supply voltage range of 3.2V to 12.6V. This wide input range accommodates diverse power sources including single Li-ion cells (3.0–4.2V), 3.3V LDO outputs, and higher-voltage industrial rails. The minimum 3.2V requirement ensures sufficient headroom for the 140–200mV dropout voltage at full 4mA load. Supply current remains stable across this range, varying by only 1.5µA/V (max), as documented in the Electrical Characteristics table for MAX6129_30.

How accurate is the MAX6129AEUK30-T over temperature?

The MAX6129AEUK30-T provides ±0.4% initial accuracy at +25°C and a maximum temperature coefficient of 40ppm/°C over –40°C to +85°C. This results in a total output variation of ≤ ±1.2mV (±0.04%) across the full industrial temperature range. Long-term stability is rated at 150ppm over 1000 hours, and thermal hysteresis is limited to 140ppm - all measured and guaranteed for the A-grade SOT23-5 packaged device. These figures are extracted from the MAX6129_30 Electrical Characteristics table and Typical Operating Characteristics plots.

What package type and pin configuration does the MAX6129AEUK30-T use?

The MAX6129AEUK30-T uses a 5-pin SOT23-5 surface-mount package (JEDEC MO-178AA) with top marking "ADRQ". Pin 1 is IN (supply input), Pin 2 is GND, Pins 3 and 4 are internally connected no-connects (safe to leave unconnected or tie to ground), and Pin 5 is OUT (3.000V reference output). This pinout is confirmed in the Pin Configuration diagram, Pin Description table, and Package Information section of the datasheet.