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Analog Devices Inc./Maxim Integrated MAX6126A28+
- Part No.:
- MAX6126A28+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6126A28+.pdf
- Description:
- IC VREF SERIES 0.06% 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:350
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Product details
Overview
MAX6126A28+ from Maxim Integrated is an ultra-high-precision, ultra-low-noise series voltage reference delivering a stable 2.800V output with ±0.06% initial accuracy, 3ppm/°C max temperature coefficient (–40°C to +125°C), and 1.45µVP-P (0.1Hz–10Hz) flicker noise. It operates from 3.0V 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 automotive-grade test equipment.
For engineers reviewing the MAX6126A28+ datasheet, MAX6126A28+ pinout, MAX6126A28+ application, or MAX6126A28+ equivalent, this page delivers verified specifications, validated pin functions, real-world use cases in precision metrology and industrial control, and two confirmed alternative parts with documented technical and application differences.
Technical Context
The MAX6126A28+ uses curvature-corrected bandgap architecture with laser-trimmed thin-film resistors to achieve 3ppm/°C tempco and ±0.06% initial accuracy over –40°C to +125°C. Its proprietary low-noise design delivers 1.45µVP-P (0.1Hz–10Hz) and 75nV/√Hz wideband noise (1kHz, no NR cap), reducible to 45nV/√Hz with 0.1µF on NR pin.
It implements true Kelvin force-sense topology: OUTF supplies load current while OUTS and GNDS form a high-impedance feedback path, actively canceling IR drops in PCB traces and connectors. Dropout is as low as 60mV at 5mA load, and it remains stable with 0.1µF–10µF output capacitance without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.800V ±0.06% at +25°C - sets precise bias point for 16-bit+ data converters and calibration standards. |
| Tempco | 3ppm/°C max (–40°C to +125°C) - ensures ≤±0.0014V drift over full automotive range, critical for field-deployed instrumentation. |
| Noise (0.1–10Hz) | 1.45µVP-P - enables sub-16-bit noise floor in high-res digital voltmeters and ATE reference rails. |
| Dropout Voltage | 60mV min at 5mA - allows operation from 2.86V supply, supporting low-voltage battery-powered precision systems. |
| Load Regulation | 1.3–2.4µV/mA sourcing/sinking - maintains <±25µV error across full ±10mA load swing, essential for active current sources. |
| Supply Current | 380µA typical, <725µA max (–40°C to +125°C) - enables always-on reference in power-constrained IoT sensor nodes. |
| Capacitive Load Range | 0.1µF to 10µF - permits robust bypassing for noisy switching loads without instability risk. |
Pinout & Package
MAX6126A28+ is housed in an 8-pin µMAX package (3.0mm × 3.0mm, 0.8mm height), optimized for space-constrained automotive and industrial PCBs. Pin 1 (NR) accepts a 0.1µF capacitor to reduce wideband noise by 40%; pins 5 and 8 are internally connected and must remain unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 NR | Noise Reduction Input | Accepts 0.1µF capacitor to lower 1kHz noise from 75nV/√Hz to 45nV/√Hz; floating if unused. |
| 2 IN | Positive Supply Input | Operates from 3.0V to 12.6V; supplies 380µA quiescent current independent of VIN. |
| 3 GND | Power Ground | Reference return for internal circuitry; separate from GNDS to isolate ground-current paths. |
| 4 GNDS | Ground Sense Terminal | Connects to load ground point to cancel ground-path IR drop in Kelvin configurations. |
| 5, 8 I.C. | Internally Connected | No external connection permitted; electrically tied to internal substrate or guard ring. |
| 6 OUTS | Voltage Sense Output | High-impedance feedback node regulating OUTF; connects directly to load reference point. |
| 7 OUTF | Voltage Force Output | Delivers up to 10mA load current; bypassed with 0.1–10µF capacitor to GND for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Force-Sense Output Architecture | Separate OUTF (current delivery) and OUTS/GNDS (voltage sensing) eliminate trace resistance errors in remote load applications. |
| Ultra-Low Flicker Noise | 1.45µVP-P (0.1Hz–10Hz) enables DC-accurate measurements in digital multimeters and calibration standards. |
| Automotive Temperature Range | Specified from –40°C to +125°C with 3ppm/°C max tempco - qualified for under-hood and industrial control environments. |
| Low Dropout Operation | 60mV dropout at 5mA allows use with 2.86V supplies, extending battery life in portable precision instruments. |
| Stable with Wide Capacitance Range | Guaranteed stability from 0.1µF to 10µF output capacitance - simplifies layout and supports dynamic load transients. |
Applications
| High-Resolution Data Acquisition | Automotive ATE Equipment |
|---|---|
|
Use Scenario: 24-bit sigma-delta ADC front-end in battery-powered portable calibrators requiring <1ppm linearity error. IC Role / Device Role / Timing Role: Primary voltage reference establishing absolute scale for analog input channel; OUTF/OUTS pair compensates for PCB trace resistance. Use Value: 3ppm/°C tempco and 1.45µVP-P noise ensure <±2LSB error over temperature and time, meeting ANSI C12.20 Class 0.1 metering specs. |
Use Scenario: Automated test system for engine control units (ECUs) performing parametric verification at –40°C and +125°C. IC Role / Device Role / Timing Role: Stable 2.800V reference for DAC-controlled stimulus generation and ADC reference in multi-channel DUT interface boards. Use Value: Guaranteed ±0.06% accuracy and 20ppm/1000hr long-term stability eliminate recalibration between production batches. |
| Precision Current Sources | Industrial Process Control Transmitters |
|
Use Scenario: 4–20mA loop transmitter with HART modulation requiring <0.05% total error over 15-year field life. IC Role / Device Role / Timing Role: Sets exact voltage across precision shunt resistor; OUTF drives transistor base while OUTS senses emitter voltage for closed-loop regulation. Use Value: 1.3µV/mA load regulation and 2.4µV/mA sink regulation maintain <±2µA current error across full 4–20mA range, exceeding IEC 61298-2 Class 0.05. |
Use Scenario: Smart pressure transmitter deployed in oil & gas refineries where ambient temperature swings exceed 100°C. IC Role / Device Role / Timing Role: Reference for ratiometric bridge excitation and ADC conversion; GNDS/OUTS routing cancels ground potential shifts from shared plant grounding. Use Value: Thermal hysteresis of 80ppm (µMAX) and 20ppm (SO) ensures repeatability after thermal cycling, critical for custody transfer accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5025IDR | 2.5V output, ±0.02% initial accuracy, 3ppm/°C tempco, 1.2µVP-P noise; SO-8 package only. | Fixed 2.5V output limits use in 2.8V-systems; superior initial accuracy but higher 1kHz noise (105nV/√Hz). | Select when 2.5V matches system ADC VREF and tighter initial tolerance justifies trade-off in noise and output voltage flexibility. |
| ADR4525BRZ | 2.5V output, ±0.02% initial accuracy, 2ppm/°C tempco, 1.05µVP-P noise; SO-8 package, 125°C max rating. | Same 2.5V limitation; lower tempco but requires ≥3.3V supply (vs. 3.0V for MAX6126A28+), limiting low-voltage operation. | Choose for highest stability in fixed 2.5V, high-temp industrial PLCs where supply headroom exceeds 3.3V. |
Compared with REF5025IDR and ADR4525BRZ, MAX6126A28+ offers the unique combination of 2.800V output, 3.0V minimum supply, and integrated force-sense architecture - enabling direct replacement in 2.8V rail systems with remote sensing, where alternatives require redesign or external Kelvin wiring.
Availability
MAX6126A28+ is available at Aetrix Electronics and suitable for high-resolution data acquisition, automotive ATE equipment, and precision current source designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6126A28+ 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, emphasizing low noise, high accuracy, and robust operation.
The MAX6126 family targets ultra-precision voltage references for metrology-grade instrumentation and automotive test systems, combining curvature correction, thin-film trimming, and force-sense outputs to achieve sub-ppm stability in harsh environments.
FAQ
What is the guaranteed initial accuracy of MAX6126A28+ over temperature?
The MAX6126A28+ guarantees ±0.06% initial accuracy at +25°C, with temperature coefficient limited to 3ppm/°C maximum over the full –40°C to +125°C automotive range. This translates to a worst-case output deviation of ±0.0014V at extremes, verified per the datasheet's "Electrical Characteristics-MAX6126_28" table under A-grade µMAX conditions.
Can MAX6126A28+ operate from a 2.9V supply?
No - MAX6126A28+ requires a minimum supply voltage of 3.0V, as specified in its "Electrical Characteristics-MAX6126_28" table under "Supply Voltage Range". At 2.9V, the device may fail to regulate or exhibit increased dropout-related errors; 3.0V is the absolute minimum for guaranteed performance.
How does the NR pin reduce noise in MAX6126A28+?
The NR pin accepts a 0.1µF capacitor to reduce wideband noise from 75nV/√Hz to 45nV/√Hz at 1kHz and lower 0.1Hz–10Hz flicker noise from 1.45µVP-P to 0.9µVP-P. This internal noise-reduction path filters high-frequency supply coupling without increasing quiescent current, as confirmed in the "Detailed Description" and "Electrical Characteristics" sections.
Is MAX6126A28+ pin-compatible with other MAX6126 variants?
Yes - all MAX6126 variants, including MAX6126A28+, share identical 8-pin µMAX pinout and footprint. The "Pin Configuration" diagram confirms consistent NR/IN/GND/GNDS/OUTS/OUTF assignment across the family, enabling voltage-output swaps without PCB changes.
What is the maximum load current supported by MAX6126A28+?
MAX6126A28+ supports ±10mA load current - sourcing up to +10mA from OUTF and sinking up to –10mA into OUTF - with load regulation specified at 1.3–2.4µV/mA. This capability is validated in the "Electrical Characteristics-MAX6126_28" table under "Load Regulation" and "Output Short-Circuit Current" parameters.
MAX6126A28+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.06%
- Temperature Coefficient:
- 5ppm/°C
- Noise - 0.1Hz to 10Hz:
- 1.45µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 3V ~ 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
MAX6126A28+ FAQ
1.How can I place an order for MAX6126A28+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6126A28+ 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 MAX6126A28+ reliable?
The price and inventory of MAX6126A28+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6126A28+ is usually 5 days.
3.What payment methods are accepted for MAX6126A28+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6126A28+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6126A28+?
MAX6126A28+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6126A28+ 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 MAX6126A28+?
For technical support, including MAX6126A28+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6126A28+ requirements.
6.How does Aetrix verify that MAX6126A28+ is sourced from the original manufacturer or authorized distributors?
All MAX6126A28+ 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 MAX6126A28+ meets industry standards.
7.What is the process for return or replacement of MAX6126A28+?
All MAX6126A28+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6126A28+, 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 MAX6126A28+ part is unused and in its original packaging.
Return procedure for MAX6126A28+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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