Analog Devices Inc./Maxim Integrated MAX6126A50+T

Overview

MAX6126A50+T from Maxim Integrated is an ultra-high-precision, ultra-low-noise series voltage reference delivering 5.000V output with ±0.02% (max) initial accuracy, 3ppm/°C (max) temperature coefficient over -40°C to +125°C, and 2.85µV_P-P (0.1Hz–10Hz) flicker noise. It operates from 5.2V to 12.6V supply, supports ±10mA load current, and enables remote sensing via separate force (OUTF) and sense (OUTS) outputs - ideal for high-resolution ADC/DAC biasing in industrial process control.

For engineers reviewing the MAX6126A50+T datasheet, MAX6126A50+T pinout, MAX6126A50+T application, or MAX6126A50+T equivalent, key selection criteria include its 5.000V output stability under wide input voltage variation, Kelvin-sensing capability for millivolt-level accuracy in precision current sources, low 380µA quiescent current, and guaranteed 0.2V max dropout at 10mA load.

Technical Context

The MAX6126A50+T employs curvature-correction circuitry and laser-trimmed thin-film resistors to achieve 3ppm/°C (max) tempco and ±0.02% initial accuracy. Its proprietary low-noise architecture delivers 145nV/√Hz wideband noise (1kHz, no NR cap) and reduces to 95nV/√Hz with 0.1µF on NR pin.

It features dual-output Kelvin configuration (OUTF/OUTS and GNDS/GND), enabling remote voltage regulation by canceling trace resistance drops. Dropout voltage is specified at 0.2V (max) for 5mA load and 0.4V (max) for 10mA load, with supply current virtually independent of VIN (≤2µA/V variation).

Key Specifications

Pinout & Package

MAX6126A50+T is housed in an 8-pin SO package (SOIC-8), with exposed pad for thermal performance. Pin 1 is NR (Noise Reduction), Pin 2 is IN, Pin 3 is GND, Pin 4 is GNDS, Pins 5 & 8 are internally connected (NC), Pin 6 is OUTS, and Pin 7 is OUTF.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADR4550BRZ and REF5050AIDR, MAX6126A50+T uniquely combines 5.000V precision, ultra-low 2.85µV_P-P flicker noise, integrated force/sense architecture, and active noise reduction - making it the only option supporting both sub-LSB ADC accuracy and millivolt-level current-source regulation in a single SOIC-8 package.

Availability

MAX6126A50+T is available at Aetrix Electronics and suitable for high-resolution data acquisition, precision current sources, digital voltmeters, and industrial process control requiring stable component supply across automotive (-40°C to +125°C) operating conditions.

Supply support for MAX6126A50+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 high-performance analog and mixed-signal ICs for precision, power, and interface applications.

The MAX6126 family targets ultra-precision voltage reference needs in test equipment, industrial automation, and automotive systems where low noise, tight tempco, and long-term stability are mandatory.

FAQ

What is the maximum dropout voltage specification for MAX6126A50+T at 10mA load current?

The MAX6126A50+T has a maximum dropout voltage of 0.4V at 10mA load current, defined as the minimum (VIN – VOUT) differential required to maintain output regulation within 0.1% of 5.000V. This allows reliable operation from a 5.4V supply rail while retaining 200mV headroom for line regulation margin.

How does the force/sense architecture of MAX6126A50+T improve accuracy in precision current-source designs?

The MAX6126A50+T uses separate OUTF (force) and OUTS (sense) outputs to implement true Kelvin regulation. By routing OUTF to the load and returning OUTS directly to the load's reference point, voltage drops across PCB traces are excluded from the feedback loop - enabling sub-0.1% current accuracy even with 100mΩ trace resistance.

Can MAX6126A50+T operate with a 0.1µF output capacitor, and what is the minimum recommended value?

Yes, MAX6126A50+T is stable with a 0.1µF output capacitor connected from OUTF to GND, which is also the minimum recommended value per the datasheet. Capacitance below 0.1µF risks oscillation; values up to 10µF are supported for improved transient response and low-frequency noise filtering.

What is the typical quiescent supply current of MAX6126A50+T, and how does it vary with input voltage?

The typical quiescent supply current of MAX6126A50+T is 380µA at +25°C and varies by ≤2µA/V across the 5.2V to 12.6V supply range - meaning current remains effectively constant regardless of VIN, simplifying power budgeting in wide-input-voltage systems.

Is MAX6126A50+T qualified for automotive applications, and what temperature range does it support?

Yes, MAX6126A50+T is qualified for automotive applications and operates across the full -40°C to +125°C temperature range, with all key parameters - including ±0.02% initial accuracy and 3ppm/°C tempco - guaranteed over this extended range per the datasheet specifications.