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

Analog Devices Inc./Maxim Integrated MAX6126A30

Name: MAX6126A30
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX6126A30
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MAX6126A30

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Voltage Reference

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

Datasheet:: MAX6126A30.pdf

Description:: VOLTAGE REFERENCE

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MAX6126A30 from Maxim Integrated is an ultra-high-precision, ultra-low-noise series voltage reference with 3.000V nominal output, ±0.06% initial accuracy (A grade), 3ppm/°C max temperature coefficient, and 1.75µV_P-P (0.1Hz–10Hz) flicker noise - designed for high-resolution ADC/DAC biasing in industrial process control and ATE equipment.

For engineers reviewing the MAX6126A30 datasheet, MAX6126A30 pinout, MAX6126A30 application, or MAX6126A30 equivalent, key selection criteria include its force/sense outputs for remote sensing, 200mV max dropout at 10mA, stability with 0.1µF–10µF load capacitance, and automotive-grade -40°C to +125°C operation without external resistor dependency.

Technical Context

The MAX6126A30 employs curvature-correction circuitry and laser-trimmed thin-film resistors to achieve 3ppm/°C max TCV_OUT over -40°C to +125°C and ±0.06% initial accuracy at +25°C. Its proprietary low-noise architecture delivers 1.75µV_P-P (0.1Hz–10Hz) and 90nV/√Hz wideband noise (C_NR = 0), reducible to 55nV/√Hz with a 0.1µF NR capacitor.

It operates as a series-mode reference with independent force (OUTF) and sense (OUTS) outputs enabling Kelvin sensing, and features supply current virtually independent of input voltage (380µA typ, ≤725µA over temp), stable with C_LOAD = 0.1µF–10µF, and guaranteed load regulation <0.025Ω for ±10mA sink/source.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	3.000V nominal; enables direct interface with 3V logic and 12-bit+ SAR/ΣΔ ADCs without scaling.
Initial Accuracy	±0.06% at +25°C (A grade); reduces system calibration burden in precision instrumentation.
Temp Coefficient	3ppm/°C max (-40°C to +125°C); ensures ≤0.36 LSB drift over full range in 16-bit systems.
Flicker Noise	1.75µV_P-P (0.1Hz–10Hz); critical for low-frequency measurement stability in digital voltmeters.
Dropout Voltage	0.11V max at 10mA load; supports operation from 3.2V supply in battery-powered portable test gear.
Supply Current	380µA typical; enables low-power operation in always-on sensor nodes and IoT edge devices.
Load Regulation	2.8µV/mA max sinking; maintains reference integrity under dynamic load transients in DAC buffer circuits.

Pinout & Package

The MAX6126A30 is housed in an 8-pin µMAX package (U8+1 outline, 3mm × 3mm footprint), optimized for space-constrained PCB layouts in automated test equipment and portable instrumentation.

Pin/Terminal	Circuit Role	Design Meaning
1 NR	Noise Reduction	Accepts 0.1µF capacitor to reduce wideband noise from 90nV/√Hz to 55nV/√Hz; left open if unused.
2 IN	Positive Supply Input	Operates from 3.2V to 12.6V; supplies internal bandgap and error amplifier; requires local bypass.
3 GND	Power Ground	Reference ground return for internal circuitry; separate from GNDS to enable Kelvin sensing.
4 GNDS	Ground Sense	Connects to load-side ground to cancel ground path IR drop; must tie to same point as OUTS at load.
5,8 I.C.	Internally Connected	No external connection; floating or tied to GND/IN causes undefined behavior.
6 OUTS	Voltage Sense Output	Feedback node for regulation loop; connects directly to load reference point for remote sensing.
7 OUTF	Voltage Force Output	Delivers regulated 3.000V current to load; shorted to OUTS near load to eliminate trace resistance error.

Key Features

Feature	Design Value
Force/Sense Outputs	Enables true 4-wire Kelvin sensing to eliminate voltage drop errors in long traces or high-current paths.
Low Flicker Noise	1.75µV_P-P (0.1Hz–10Hz) ensures stable DC bias for high-accuracy weigh scales and strain gauge bridges.
Wide Capacitive Load Range	Stable with 0.1µF–10µF output capacitance; allows use of ceramic + bulk electrolytic for transient immunity.
Automotive Temperature Range	-40°C to +125°C operation qualified per AEC-Q100; suitable for engine control and EV battery monitoring.
Low Dropout	200mV max dropout at 10mA enables single-supply operation from 3.3V rails in FPGA I/O banks and microcontroller ADCs.

Applications

High-Resolution A/D Converters	ATE Equipment
Use Scenario: Reference for 16-bit SAR ADC in automated calibration station requiring <±1 LSB total error over temperature. IC Role / Device Role / Timing Role: Provides stable 3.000V reference voltage with 3ppm/°C drift and 1.75µV_P-P low-frequency noise. Use Value: Enables 16-bit linearity without system-level recalibration across -40°C to +85°C ambient.	Use Scenario: Precision current source in semiconductor parametric tester driving DUT bias currents from 100µA to 10mA. IC Role / Device Role / Timing Role: Serves as reference for op-amp-based Howland current source with OUTF/GNDS forcing and OUTS/GNDS sensing. Use Value: Delivers 0.01% current accuracy over temperature via force-sense topology and low TCV_OUT.
Digital Voltmeters	Precision Industrial Control
Use Scenario: 7½-digit DVM front-end requiring sub-ppm stability and ultra-low 1/f noise for DC voltage measurements. IC Role / Device Role / Timing Role: Primary reference for dual-slope integrator; OUTF drives integrator capacitor, OUTS feeds comparator threshold. Use Value: 1.75µV_P-P flicker noise and 20ppm/1000hr long-term stability ensure repeatable metrology-grade readings.	Use Scenario: Analog input module in PLC rack measuring 4–20mA loop signals with 0.1% full-scale accuracy. IC Role / Device Role / Timing Role: Supplies excitation voltage to precision shunt resistor and reference for 24-bit ΣΔ ADC. Use Value: 3ppm/°C TCV_OUT and ±0.06% initial accuracy meet IEC 61000-4-30 Class A requirements for power quality analyzers.

High-Resolution A/D Converters

ATE Equipment

Use Scenario: Reference for 16-bit SAR ADC in automated calibration station requiring <±1 LSB total error over temperature.

IC Role / Device Role / Timing Role: Provides stable 3.000V reference voltage with 3ppm/°C drift and 1.75µV_P-P low-frequency noise.

Use Value: Enables 16-bit linearity without system-level recalibration across -40°C to +85°C ambient.

Use Scenario: Precision current source in semiconductor parametric tester driving DUT bias currents from 100µA to 10mA.

IC Role / Device Role / Timing Role: Serves as reference for op-amp-based Howland current source with OUTF/GNDS forcing and OUTS/GNDS sensing.

Use Value: Delivers 0.01% current accuracy over temperature via force-sense topology and low TCV_OUT.

Digital Voltmeters

Precision Industrial Control

Use Scenario: 7½-digit DVM front-end requiring sub-ppm stability and ultra-low 1/f noise for DC voltage measurements.

IC Role / Device Role / Timing Role: Primary reference for dual-slope integrator; OUTF drives integrator capacitor, OUTS feeds comparator threshold.

Use Value: 1.75µV_P-P flicker noise and 20ppm/1000hr long-term stability ensure repeatable metrology-grade readings.

Use Scenario: Analog input module in PLC rack measuring 4–20mA loop signals with 0.1% full-scale accuracy.

IC Role / Device Role / Timing Role: Supplies excitation voltage to precision shunt resistor and reference for 24-bit ΣΔ ADC.

Use Value: 3ppm/°C TCV_OUT and ±0.06% initial accuracy meet IEC 61000-4-30 Class A requirements for power quality analyzers.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
REF5030IDR	3.0V output, ±0.05% initial accuracy, 3ppm/°C max TCV_OUT, but higher 3.5µV_P-P flicker noise and no force/sense outputs.	Lacks Kelvin sensing capability; requires external compensation for trace resistance in high-accuracy current sources.	Select REF5030IDR only when ultra-low noise is secondary to initial accuracy and cost sensitivity dominates.
ADR4530BRZ	3.0V output, ±0.02% initial accuracy, 3ppm/°C max TCV_OUT, 1.75µV_P-P noise, but no NR pin or force/sense architecture.	Cannot implement remote sensing; limited to 2-wire configurations where PCB layout minimizes IR drop.	Choose ADR4530BRZ for space-constrained designs needing tighter initial tolerance but accepting fixed 2-wire topology.

Compared with REF5030IDR and ADR4530BRZ, the MAX6126A30 uniquely combines force/sense outputs, 0.1µF–10µF capacitive-load stability, and automotive temperature rating - making it the only option for high-accuracy remote-sensing applications in harsh environments.

Availability

MAX6126A30 is available at Aetrix Electronics and suitable for high-resolution A/D converters, ATE equipment, and precision industrial control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6126A30 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 industrial, automotive, and communications applications.

The MAX6126 product line delivers ultra-high-precision, ultra-low-noise series voltage references targeting metrology-grade instrumentation, automated test systems, and high-reliability industrial control where long-term stability and remote sensing are critical.

FAQ

What is the maximum allowable input voltage for the MAX6126A30?

The MAX6126A30 supports a supply voltage range of 3.2V to 12.6V. Absolute maximum rating is +13V on the IN pin. Operation above 12.6V violates specifications and may cause permanent damage. For reliable performance, maintain VIN within the specified range and use local decoupling at the IN pin.

Does the MAX6126A30 require an external resistor like shunt references?

No, the MAX6126A30 is a series-mode voltage reference and does not require an external resistor. Its supply current is virtually independent of input voltage (380µA typical), eliminating wasted current and simplifying design compared to two-terminal shunt references.

How does the force/sense architecture of the MAX6126A30 improve accuracy?

The MAX6126A30 uses separate OUTF (force) and OUTS (sense) pins to implement Kelvin sensing. By routing OUTF to the load and feeding OUTS back to the regulation loop at the load point, it cancels voltage drops in PCB traces and interconnects - improving absolute accuracy by up to 10× in high-current or long-trace applications.

Can the MAX6126A30 drive a 10µF output capacitor?

Yes, the MAX6126A30 is stable with output capacitance from 0.1µF to 10µF. Using 10µF improves transient response for rapidly changing loads, such as in DAC buffer circuits. Place the capacitor as close as possible to the OUTF pin and connect its ground to GND (not GNDS).

What is the purpose of the NR pin on the MAX6126A30?

NR (Noise Reduction) is a dedicated pin that accepts a 0.1µF capacitor to reduce wideband noise from 90nV/√Hz to 55nV/√Hz at 1kHz. This capacitor also improves AC power-supply rejection. Leaving NR unconnected retains baseline noise performance; larger values yield diminishing returns.

MAX6126A30 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):: 3V

Voltage - Output (Max):: -

Current - Output:: 10 mA

Tolerance:: ±0.06%

Temperature Coefficient:: 5ppm/°C

Noise - 0.1Hz to 10Hz:: 1.75µVp-p

Noise - 10Hz to 10kHz:: -

Voltage - Input:: 3.2V ~ 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

MAX6126A30 FAQ

1.How can I place an order for MAX6126A30 through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX6126A30 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 MAX6126A30 reliable?

The price and inventory of MAX6126A30 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6126A30 is usually 5 days.

3.What payment methods are accepted for MAX6126A30?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6126A30 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX6126A30?

MAX6126A30 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX6126A30 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 MAX6126A30?

For technical support, including MAX6126A30 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6126A30 requirements.

6.How does Aetrix verify that MAX6126A30 is sourced from the original manufacturer or authorized distributors?

All MAX6126A30 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 MAX6126A30 meets industry standards.

7.What is the process for return or replacement of MAX6126A30?

All MAX6126A30 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6126A30, 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 MAX6126A30 part is unused and in its original packaging.

Return procedure for MAX6126A30:

1.Submit a request within 90 days.

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

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