Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Analog Devices Inc./Maxim Integrated MAX6126A21

Name: MAX6126A21
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX6126A21
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: MAX6126A21

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Voltage Reference

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

Datasheet:: MAX6126A21.pdf

Description:: VOLTAGE REFERENCE

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,470

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

MAX6126A21 from Maxim Integrated is an ultra-high-precision, ultra-low-noise series voltage reference delivering 2.048V output with ±0.06% initial accuracy, 3ppm/°C max temperature coefficient, and 1.3µV_P-P (0.1Hz–10Hz) flicker noise. It operates from 2.7V to 12.6V supply, supports ±10mA load current, and is used in high-resolution ADC/DAC systems requiring stable, low-drift references.

For engineers reviewing the MAX6126A21 datasheet, MAX6126A21 pinout, MAX6126A21 application, or MAX6126A21 equivalent, key selection criteria include initial accuracy vs. tempco trade-offs, force/sense Kelvin configuration for remote sensing, dropout voltage under 200mV at 10mA, and compatibility with 0.1µF–10µF capacitive loads without oscillation.

Technical Context

The MAX6126A21 employs curvature-correction circuitry and laser-trimmed thin-film resistors to achieve 3ppm/°C max tempco over –40°C to +125°C. Its proprietary low-noise architecture delivers 1.3µV_P-P flicker noise and 60nV/√Hz wideband noise (C_NR = 0), reducible to 35nV/√Hz with a 0.1µF noise-reduction capacitor on NR.

It features independent force (OUTF) and sense (OUTS) outputs plus ground-sense (GNDS) for true Kelvin regulation-enabling cancellation of line-drop errors in precision current sources and high-accuracy data converter references where trace resistance impacts stability.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	2.048V nominal; enables direct interface with 12-bit (4096-step) and 16-bit (65536-step) ADCs using full-scale binary scaling.
Initial Accuracy	±0.06% at +25°C; guarantees ≤1.23mV absolute error at 2.048V, critical for sub-LSB error budgets in metrology-grade instruments.
Tempco	3ppm/°C max (–40°C to +125°C); ensures ≤0.78mV drift over full automotive range, supporting ATE and industrial control without calibration.
Noise (0.1Hz–10Hz)	1.3µV_P-P; contributes <0.0006 LSB RMS noise in a 16-bit 2.048V system, preserving effective resolution.
Dropout Voltage	200mV max at 10mA; allows operation from 2.248V supply, enabling use with low-headroom LDOs or battery-powered sensor nodes.
Load Regulation	0.025Ω max; maintains output stability across ±10mA sourcing/sinking, essential for dynamic precision current sources.
Quiescent Current	380µA typical; enables low-power portable instrumentation while retaining ultra-precision performance.

Pinout & Package

The MAX6126A21 is housed in an 8-pin µMAX package (package code U8+1), measuring 3mm × 3mm × 0.8mm, optimized for space-constrained PCB layouts in test equipment and embedded sensors.

Pin/Terminal	Circuit Role	Design Meaning
1 - NR	Noise Reduction Input	Accepts 0.1µF capacitor to reduce wideband noise from 60nV/√Hz to 35nV/√Hz; left open if noise reduction not required.
2 - IN	Positive Supply Input	Accepts 2.7V–12.6V input; supply current is virtually independent of VIN, simplifying power rail design.
3 - GND	Power Ground	Reference ground for internal circuitry; must be connected to system ground plane with low-inductance path.
4 - GNDS	Ground Sense	Connects to load-side ground point to cancel return-path IR drop-required for Kelvin ground sensing.
5, 8 - I.C.	Internally Connected	No external connection permitted; floating or tied to GND/IN causes undefined behavior.
6 - OUTS	Voltage Sense Output	Provides feedback to internal regulator; connect directly to load's reference input node for remote voltage regulation.
7 - OUTF	Voltage Force Output	Delivers regulated current to load; short to OUTS near load to complete Kelvin loop and minimize sense error.

Key Features

Feature	Design Value
Force/Sense Outputs (OUTF/OUTS)	Enables true 4-wire Kelvin regulation-eliminates voltage error from PCB trace resistance up to 0.1Ω in precision current sources.
Ultra-Low Flicker Noise	1.3µV_P-P (0.1Hz–10Hz) ensures minimal low-frequency drift in digital voltmeters and weigh-scale front-ends.
Stable with 0.1µF–10µF Load Capacitance	Eliminates need for external compensation networks; supports ceramic or tantalum bypassing without risk of oscillation.
Low Dropout (200mV @ 10mA)	Permits operation from single-cell Li-ion (3.0V min) or coin-cell (3.0V) supplies when paired with 2.048V reference requirement.
Long-Term Stability	20ppm/1000hr max; reduces recalibration frequency in field-deployed process controllers and calibration standards.

Applications

High-Resolution Data Acquisition	Precision Current Sources
Use Scenario: 16-bit SAR ADC in automated test equipment digitizing sensor signals with <1 LSB total error budget. IC Role / Device Role / Timing Role: Provides stable, low-noise reference voltage for ADC full-scale calibration and ratiometric measurement. Use Value: 3ppm/°C tempco and 1.3µV_P-P noise ensure <0.005% gain error and no added quantization noise floor degradation.	Use Scenario: Programmable 4–20mA transmitter with 0.1% accuracy over –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Serves as precision voltage source for current-setting resistor in op-amp-based Howland current pump. Use Value: Force/sense outputs cancel PCB trace resistance error; ±0.06% initial accuracy meets IEC 61000-4-2 Class B requirements.
Digital Voltmeters	Industrial Process Control
Use Scenario: Benchtop DVM with 6½-digit resolution requiring <10ppm reference stability over 24-hour period. IC Role / Device Role / Timing Role: Primary reference standard for auto-zeroed integrator and dual-slope conversion stages. Use Value: 20ppm/1000hr long-term drift and 0.025Ω load regulation enable <0.001% reading repeatability without daily recalibration.	Use Scenario: PLC analog input module measuring thermocouple or RTD signals in oil & gas control cabinets. IC Role / Device Role / Timing Role: Reference for sigma-delta ADC and isolated signal conditioning stage operating at +125°C junction temperature. Use Value: Guaranteed operation from –40°C to +125°C with 3ppm/°C tempco ensures <0.01% span error across full industrial temperature range.

High-Resolution Data Acquisition

Precision Current Sources

Use Scenario: 16-bit SAR ADC in automated test equipment digitizing sensor signals with <1 LSB total error budget.

IC Role / Device Role / Timing Role: Provides stable, low-noise reference voltage for ADC full-scale calibration and ratiometric measurement.

Use Value: 3ppm/°C tempco and 1.3µV_P-P noise ensure <0.005% gain error and no added quantization noise floor degradation.

Use Scenario: Programmable 4–20mA transmitter with 0.1% accuracy over –40°C to +85°C ambient.

IC Role / Device Role / Timing Role: Serves as precision voltage source for current-setting resistor in op-amp-based Howland current pump.

Use Value: Force/sense outputs cancel PCB trace resistance error; ±0.06% initial accuracy meets IEC 61000-4-2 Class B requirements.

Digital Voltmeters

Industrial Process Control

Use Scenario: Benchtop DVM with 6½-digit resolution requiring <10ppm reference stability over 24-hour period.

IC Role / Device Role / Timing Role: Primary reference standard for auto-zeroed integrator and dual-slope conversion stages.

Use Value: 20ppm/1000hr long-term drift and 0.025Ω load regulation enable <0.001% reading repeatability without daily recalibration.

Use Scenario: PLC analog input module measuring thermocouple or RTD signals in oil & gas control cabinets.

IC Role / Device Role / Timing Role: Reference for sigma-delta ADC and isolated signal conditioning stage operating at +125°C junction temperature.

Use Value: Guaranteed operation from –40°C to +125°C with 3ppm/°C tempco ensures <0.01% span error across full industrial temperature range.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
REF5020IDR	2.048V output, ±0.05% initial accuracy, 3ppm/°C tempco, but higher 3.8µV_P-P flicker noise and no force/sense outputs.	Lacks Kelvin sensing; unsuitable for precision current sources or long-trace remote sensing.	Select REF5020IDR only when ultra-low noise is secondary to initial accuracy and cost is constrained.
ADR4520BRZ	2.048V output, ±0.02% initial accuracy, 2ppm/°C tempco, but 2.5µV_P-P noise and requires external compensation for >1µF loads.	Higher quiescent current (950µA) limits battery life; no integrated noise-reduction pin.	Choose ADR4520BRZ when highest initial accuracy is mandatory and board space allows larger decoupling network.

Compared with REF5020IDR and ADR4520BRZ, the MAX6126A21 uniquely combines ultra-low 1.3µV_P-P noise, force/sense architecture, and µMAX footprint-making it optimal for space-limited, noise-sensitive, and remote-sensing applications where both precision and layout efficiency are critical.

Availability

MAX6126A21 is available at Aetrix Electronics and suitable for high-resolution A/D converters, precision current sources, and digital voltmeters requiring stable component supply across automotive (-40°C to +125°C), industrial, and test equipment programs.

Supply support for MAX6126A21 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, automotive, and communications applications.

The MAX6126 product line delivers ultra-stable, low-noise voltage references for metrology-grade instrumentation, high-bit-depth data acquisition, and calibration-critical systems where long-term drift and spectral noise directly impact measurement validity.

FAQ

What is the maximum load current supported by the MAX6126A21?

The MAX6126A21 supports ±10mA sink/source current while maintaining specified load regulation (<0.025Ω) and output accuracy. At 10mA sourcing, dropout remains ≤200mV, enabling reliable operation even under full-load conditions in precision current-source topologies.

Does the MAX6126A21 require an external resistor like shunt references?

No, the MAX6126A21 is a series-mode voltage reference and does not require an external current-setting 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 NR (Noise Reduction) pin function on the MAX6126A21?

The NR pin on the MAX6126A21 accepts a 0.1µF capacitor to reduce wideband noise from 60nV/√Hz to 35nV/√Hz at 1kHz. This capacitor also improves AC power-supply rejection; leaving NR unconnected retains baseline noise performance without penalty.

Can the MAX6126A21 be used with a 10µF output capacitor?

Yes, the MAX6126A21 is stable with output capacitance from 0.1µF to 10µF. A 10µF capacitor improves transient response for rapidly varying loads, and pairing it with a 0.1µF ceramic capacitor minimizes high-frequency impedance-both configurations are validated per datasheet.

What is the purpose of separate OUTF and OUTS pins on the MAX6126A21?

The OUTF (force) and OUTS (sense) pins implement a Kelvin connection: OUTF delivers current to the load, while OUTS feeds back the actual load voltage to the internal regulator. Shorting them near the load cancels trace resistance error-critical for sub-0.01% accuracy in precision current sources and remote ADC references.

MAX6126A21 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):: 2.048V

Voltage - Output (Max):: -

Current - Output:: 10 mA

Tolerance:: ±0.06%

Temperature Coefficient:: 5ppm/°C

Noise - 0.1Hz to 10Hz:: 1.3µVp-p

Noise - 10Hz to 10kHz:: -

Voltage - Input:: 2.7V ~ 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

MAX6126A21 FAQ

1.How can I place an order for MAX6126A21 through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX6126A21 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 MAX6126A21 reliable?

The price and inventory of MAX6126A21 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6126A21 is usually 5 days.

3.What payment methods are accepted for MAX6126A21?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6126A21 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX6126A21?

MAX6126A21 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX6126A21 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 MAX6126A21?

For technical support, including MAX6126A21 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6126A21 requirements.

6.How does Aetrix verify that MAX6126A21 is sourced from the original manufacturer or authorized distributors?

All MAX6126A21 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 MAX6126A21 meets industry standards.

7.What is the process for return or replacement of MAX6126A21?

All MAX6126A21 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6126A21, 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 MAX6126A21 part is unused and in its original packaging.

Return procedure for MAX6126A21:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…