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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Reference

Analog Devices Inc./Maxim Integrated MAX6126B50

Name: MAX6126B50
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX6126B50
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MAX6126B50

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Voltage Reference

Package:: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)

Datasheet:: MAX6126B50.pdf

Description:: VOLTAGE REFERENCE

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Product details

Overview

MAX6126B50 from Maxim Integrated is an ultra-high-precision, ultra-low-noise series voltage reference delivering 5.000V output with ±0.1% initial accuracy, 7ppm/°C max temperature coefficient (−40°C to +125°C), and 2.85µV_P-P (0.1Hz–10Hz) flicker noise - optimized for 16-bit+ data converters in automotive-grade industrial systems.

For engineers reviewing the MAX6126B50 datasheet, MAX6126B50 pinout, MAX6126B50 application, or MAX6126B50 equivalent, this page provides verified electrical specs, Kelvin force/sense architecture details, dropout behavior at 10mA load, long-term stability (100ppm/1000hr), and validated alternatives for high-accuracy reference design.

Technical Context

The MAX6126B50 employs curvature-corrected bandgap topology with laser-trimmed thin-film resistors to achieve 7ppm/°C tempco over −40°C to +125°C and ±0.1% initial accuracy at +25°C. Its dual-output Kelvin architecture separates OUTF (force) and OUTS (sense) to eliminate PCB trace IR drop errors in precision current sources and remote-sensing DAC references.

It operates as a low-dropout series reference with 0.1V min dropout at 5mA (ΔV_OUT = 0.1%), stable with 0.1µF–10µF capacitive loads, and features a dedicated NR pin enabling 95nV/√Hz → 80nV/√Hz wideband noise reduction via 0.1µF capacitor - without increasing quiescent current beyond 725µA max.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	5.000V nominal; enables direct interface with 5V ADC/DAC full-scale ranges without scaling resistors.
Initial Accuracy	±0.1% at +25°C; guarantees ≤5mV absolute error before calibration in production test fixtures.
Tempco (−40°C to +125°C)	7ppm/°C max; contributes ≤0.42mV drift over full automotive range - critical for <1-LSB error in 16-bit 5V systems.
Flicker Noise (0.1–10Hz)	2.85µV_P-P; limits low-frequency quantization uncertainty in precision weigh scales and sensor front-ends.
Wideband Noise (1kHz)	95nV/√Hz (C_NR = 0); reduced to 80nV/√Hz with 0.1µF NR cap - directly improves SNR in high-speed digitizers.
Dropout Voltage	0.1V min at 5mA (ΔV_OUT = 0.1%); supports operation from 5.2V supply in battery-powered 5V systems with margin.
Load Regulation	6.5µV/mA max (sinking); ensures <65µV shift across full −10mA to 0mA load range - essential for stable bias in transimpedance amps.

Pinout & Package

MAX6126B50 is housed in an 8-pin µMAX package (outline 21-0036, land pattern 90-0092), RoHS-compliant, rated for −40°C to +125°C operation.

Pin/Terminal	Circuit Role	Design Meaning
1 NR	Noise Reduction	Accepts 0.1µF capacitor to reduce wideband noise from 95nV/√Hz to 80nV/√Hz; left open if unused.
2 IN	Positive Supply Input	Operates from 5.2V to 12.6V; supply current remains stable (380µA typ) across this range.
3 GND	Power Ground	Primary ground return for internal circuitry; separate from GNDS to enable Kelvin sensing.
4 GNDS	Ground Sense	Connects to load-side ground point to cancel ground-path voltage drop in remote sensing.
5, 8 I.C.	Internally Connected	No external connection permitted; internal bond wires only - must be left floating.
6 OUTS	Voltage Sense Output	Provides feedback path to regulation loop; connects directly to load-side reference node for accuracy.
7 OUTF	Voltage Force Output	Delivers regulated 5V current to load; shorted to OUTS near load to complete Kelvin connection.

Key Features

Feature	Design Value
Force/Sense Kelvin outputs	Eliminates up to 50mΩ PCB trace resistance error in precision current sources and remote DAC references.
0.1µF–10µF capacitive-load stability	Enables use of ceramic + bulk electrolytic combinations for transient suppression in motor-control feedback loops.
20ppm/1000hr long-term stability	Reduces annual calibration frequency in metrology equipment and automated test systems.
0.025Ω effective load regulation	Translates to <0.25mV error at 10mA sink - meets requirements for Class 0.1 industrial current transmitters.
20µV/V line regulation	Maintains <100µV shift over 5.2V–12.6V input swing - critical for unregulated SMPS-supplied instrumentation.

Applications

High-Resolution A/D Converters	Precision Current Sources
Use Scenario: 16-bit SAR ADC (e.g., MAX11100) in automotive battery monitoring system requiring <±0.5 LSB total unadjusted error over −40°C to +125°C. IC Role / Device Role / Timing Role: Primary voltage reference supplying V_REF input; force/sense architecture compensates for PCB trace resistance between reference and ADC. Use Value: 7ppm/°C tempco and ±0.1% initial accuracy ensure <0.8 LSB drift over full temperature range - meeting ASIL-B functional safety margin.	Use Scenario: 4–20mA transmitter for pressure sensor in oil & gas field instrumentation, operating from 12V supply with 250Ω load. IC Role / Device Role / Timing Role: Precision current-setting reference; OUTF drives transistor base while OUTS/GNDS sense across shunt resistor. Use Value: 6.5µV/mA load regulation limits current error to <0.026mA over full 0–20mA range - exceeding IEC 61000-4-5 surge immunity requirements.
Digital Voltmeters	High-Accuracy Industrial Control
Use Scenario: Benchtop 6½-digit DVM requiring <10ppm/year drift and <0.5µV_P-P 0.1–10Hz noise floor. IC Role / Device Role / Timing Role: Master reference for internal 24-bit delta-sigma ADC; NR pin bypassed to minimize wideband noise contribution. Use Value: 2.85µV_P-P flicker noise and 100ppm/1000hr long-term stability enable <0.0015% basic accuracy specification without annual recalibration.	Use Scenario: PLC analog input module measuring thermocouple signals with cold-junction compensation, operating in factory ambient (−25°C to +70°C). IC Role / Device Role / Timing Role: Stable excitation source for RTD bridges and reference for ratiometric ADC measurements. Use Value: 0.1V dropout allows operation from 5.2V rail derived from isolated DC/DC converter - eliminating need for LDO post-regulation.

High-Resolution A/D Converters

Precision Current Sources

Use Scenario: 16-bit SAR ADC (e.g., MAX11100) in automotive battery monitoring system requiring <±0.5 LSB total unadjusted error over −40°C to +125°C.

IC Role / Device Role / Timing Role: Primary voltage reference supplying V_REF input; force/sense architecture compensates for PCB trace resistance between reference and ADC.

Use Value: 7ppm/°C tempco and ±0.1% initial accuracy ensure <0.8 LSB drift over full temperature range - meeting ASIL-B functional safety margin.

Use Scenario: 4–20mA transmitter for pressure sensor in oil & gas field instrumentation, operating from 12V supply with 250Ω load.

IC Role / Device Role / Timing Role: Precision current-setting reference; OUTF drives transistor base while OUTS/GNDS sense across shunt resistor.

Use Value: 6.5µV/mA load regulation limits current error to <0.026mA over full 0–20mA range - exceeding IEC 61000-4-5 surge immunity requirements.

Digital Voltmeters

High-Accuracy Industrial Control

Use Scenario: Benchtop 6½-digit DVM requiring <10ppm/year drift and <0.5µV_P-P 0.1–10Hz noise floor.

IC Role / Device Role / Timing Role: Master reference for internal 24-bit delta-sigma ADC; NR pin bypassed to minimize wideband noise contribution.

Use Value: 2.85µV_P-P flicker noise and 100ppm/1000hr long-term stability enable <0.0015% basic accuracy specification without annual recalibration.

Use Scenario: PLC analog input module measuring thermocouple signals with cold-junction compensation, operating in factory ambient (−25°C to +70°C).

IC Role / Device Role / Timing Role: Stable excitation source for RTD bridges and reference for ratiometric ADC measurements.

Use Value: 0.1V dropout allows operation from 5.2V rail derived from isolated DC/DC converter - eliminating need for LDO post-regulation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADR4550BRZ	5.0V output, ±0.02% initial accuracy, 3ppm/°C tempco, 1.75µV_P-P noise; SOIC-8, not automotive grade (−40°C to +125°C not guaranteed).	Higher accuracy and lower noise, but lacks GNDS/OUTS Kelvin sensing and automotive qualification.	Preferred for lab-grade metrology where tempco <3ppm/°C is mandatory and ambient stays within −40°C to +85°C.
REF5050AIDR	5.0V output, ±0.05% initial accuracy, 3ppm/°C tempco, 2.2µV_P-P noise; SOIC-8, automotive qualified (−40°C to +125°C), no NR pin or Kelvin outputs.	Matches automotive temp range and offers lower tempco, but lacks force/sense architecture and noise-reduction capability.	Selected when board space permits SOIC-8 and Kelvin sensing is unnecessary - e.g., local reference for single-chip sensor signal chain.

Compared with ADR4550BRZ and REF5050AIDR, MAX6126B50 trades 2ppm/°C tempco and 0.75µV_P-P noise for integrated Kelvin sensing and NR-capable wideband noise reduction - making it uniquely suited for remote-sensing, high-current, or mixed-noise-environment automotive applications where layout-induced errors dominate.

Availability

MAX6126B50 is available at Aetrix Electronics and suitable for high-resolution data acquisition, precision current-loop transmitters, and automotive-grade digital voltmeters requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for MAX6126B50 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.

The MAX6126 family delivers ultra-stable voltage references with Kelvin force/sense outputs and noise-reduction capability - engineered specifically for 16-bit+ data converters, metrology instruments, and high-accuracy sensor signal chains.

FAQ

What is the maximum load current the MAX6126B50 can source while maintaining regulation?

The MAX6126B50 is specified to source up to +10mA while maintaining output voltage regulation within datasheet limits. At 10mA load, dropout voltage is ≤0.4V (VIN ≥ 5.4V), and load regulation error is ≤65µV. Sourcing beyond 10mA may cause output deviation exceeding ±0.1% and is not guaranteed per the MAX6126B50 datasheet specifications.

Does the MAX6126B50 require an external resistor like shunt references?

No, the MAX6126B50 is a series-mode voltage reference and does not require an external resistor. Unlike two-terminal shunt references, its supply current (380µA typical) is virtually independent of input voltage and load conditions - simplifying design and improving efficiency in battery-powered or low-power systems.

How does the NR (Noise Reduction) pin function on the MAX6126B50?

The NR pin on the MAX6126B50 accepts a 0.1µF capacitor to ground, reducing wideband noise from 95nV/√Hz to 80nV/√Hz at 1kHz. This capacitor does not increase quiescent current. Leaving NR unconnected maintains baseline noise performance. Larger capacitances provide negligible additional noise reduction.

Can the MAX6126B50 be used with a 5.0V supply rail?

No - the MAX6126B50 requires a minimum supply voltage of 5.2V (V_OUT + 0.2V) to maintain regulation at full load. With a 5.0V supply, the device will not regulate properly and output voltage will drop below 5.000V. A 5.2V–12.6V supply is required for guaranteed operation across temperature and load.

What is the purpose of the separate GNDS and GND pins on the MAX6126B50?

GNDS is the ground-sense pin, connected to the load-side ground reference point to cancel voltage drop in the ground return path. GND is the power ground for internal circuitry. This separation enables true Kelvin (4-wire) sensing - critical for eliminating errors caused by PCB trace resistance in precision current sources and remote ADC references.

MAX6126B50 Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Package/Case:: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)

Series:: -

Packaging:: Bulk

Product Status:: Active

Reference Type:: Series

Output Type:: Fixed

Voltage - Output (Min/Fixed):: 5V

Voltage - Output (Max):: -

Current - Output:: 10 mA

Tolerance:: ±0.1%

Temperature Coefficient:: 12ppm/°C

Noise - 0.1Hz to 10Hz:: 2.85µVp-p

Noise - 10Hz to 10kHz:: -

Voltage - Input:: 5.2V ~ 12.6V

Current - Supply:: 725µA

Current - Cathode:: -

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-uMAX/uSOP

MAX6126B50 FAQ

1.How can I place an order for MAX6126B50 through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX6126B50 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MAX6126B50 reliable?

The price and inventory of MAX6126B50 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6126B50 is usually 5 days.

3.What payment methods are accepted for MAX6126B50?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6126B50 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX6126B50?

MAX6126B50 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX6126B50 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MAX6126B50?

For technical support, including MAX6126B50 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6126B50 requirements.

6.How does Aetrix verify that MAX6126B50 is sourced from the original manufacturer or authorized distributors?

All MAX6126B50 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX6126B50 meets industry standards.

7.What is the process for return or replacement of MAX6126B50?

All MAX6126B50 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6126B50, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MAX6126B50 part is unused and in its original packaging.

Return procedure for MAX6126B50:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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