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Analog Devices Inc./Maxim Integrated MAX6126AASA25+T
- Part No.:
- MAX6126AASA25+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6126AASA25+T.pdf
- Description:
- IC VREF SERIES 0.02% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:717
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Product details
Overview
MAX6126AASA25+T from Maxim Integrated is an ultra-high-precision, ultra-low-noise series voltage reference delivering 2.500V output with ±0.02% (max) initial accuracy, 3ppm/°C (max) temperature coefficient over -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 test equipment and industrial control.
For engineers reviewing the MAX6126AASA25+T datasheet, MAX6126AASA25+T pinout, MAX6126AASA25+T application, or MAX6126AASA25+T equivalent, this page delivers verified specifications, package mapping, real-world use cases, and validated alternative options - all grounded in Maxim's official electrical characteristics and ordering information for the A-grade, SO-8, 2.500V variant.
Technical Context
The MAX6126AASA25+T employs curvature-correction circuitry and laser-trimmed thin-film resistors to achieve 3ppm/°C max tempco and ±0.02% max initial accuracy across automotive temperature range (-40°C to +125°C). Its proprietary low-noise architecture delivers 1.45μVP-P (0.1Hz–10Hz) and 75nV/√Hz (1kHz, no NR cap), reducible to 45nV/√Hz with 0.1μF on NR pin.
It features dual-output Kelvin configuration (OUTF/OUTS/GNDS) for remote sensing, dropout as low as 60mV at 5mA, and stability with 0.1μF–10μF output capacitance. Supply current remains tightly regulated at 380μA (typ) with only 2μA/V variation vs. input voltage - eliminating external resistor dependency unlike shunt references.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±0.02% (max) at +25°C - enables direct interface with 2.5V-rail precision converters without scaling. |
| Tempco | 3ppm/°C (max) from -40°C to +125°C - ensures ≤±0.0075% output drift over full automotive range. |
| Noise (0.1–10Hz) | 1.45μVP-P - minimizes quantization uncertainty in 24-bit+ SAR and delta-sigma ADCs. |
| Dropout Voltage | 60mV (typ) at 5mA load - allows operation with VIN as low as 2.56V, critical for low-voltage battery systems. |
| Load Regulation | ≤25μV/mA (sourcing) - maintains <±25ppm output shift per mA load change, supporting dynamic current sources. |
| Supply Current | 380μA (typ), ≤725μA over full temp range - enables low-power portable instrumentation with predictable quiescent draw. |
| Line Regulation | 20μV/V (max) at +25°C - rejects supply ripple up to 12.6V with <±0.0008% output error per volt of VIN change. |
Pinout & Package
MAX6126AASA25+T is housed in an 8-pin SO (Small Outline) package, RoHS-compliant and lead-free. Pin assignments are validated per Maxim's official pin configuration diagram and functional descriptions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - NR | Noise Reduction Input | Accepts 0.1μF capacitor to reduce wideband noise from 75nV/√Hz to 45nV/√Hz; left open if unused. |
| 2 - IN | Positive Supply Input | Accepts 3.0V–12.6V input; supplies internal bandgap and output stage with minimal current variation vs. VIN. |
| 3 - GND | Power Ground Reference | Main ground return for internal circuitry; must be connected to system ground plane near device. |
| 4 - GNDS | Ground Sense Terminal | Connects to load-side ground point to cancel IR drop in ground return path - enables true Kelvin ground sensing. |
| 5, 8 - I.C. | Internally Connected | No external connection permitted; internally tied to substrate or unused nodes - floating or termination prohibited. |
| 6 - OUTS | Voltage Sense Output | Provides feedback path to regulation loop; connects directly to load-side reference node for accurate voltage setting. |
| 7 - OUTF | Voltage Force Output | Delivers regulated 2.500V current to load; shorted to OUTS at load point to eliminate trace resistance error. |
Key Features
| Feature | Design Value |
|---|---|
| Force/Sense Outputs (OUTF/OUTS/GNDS) | Enables 4-wire remote sensing to eliminate voltage drop errors in PCB traces and connectors - critical for sub-0.01% accuracy systems. |
| Ultra-Low Flicker Noise | 1.45μVP-P (0.1Hz–10Hz) - reduces low-frequency noise floor in precision weigh scales and strain-gauge amplifiers. |
| Low Dropout Operation | 60mV typical at 5mA - permits use with Li-ion batteries down to 2.56V while maintaining full 2.500V output accuracy. |
| Stable with Wide CLOAD | 0.1μF–10μF capacitive load range - accommodates both fast-settling (0.1μF) and low-transient (10μF) output filtering without oscillation. |
| Automotive Temperature Range | -40°C to +125°C operation with guaranteed specs - qualified for under-hood and industrial control applications requiring long-term reliability. |
Applications
| High-Resolution Data Acquisition | Automated Test Equipment (ATE) |
|---|---|
|
Use Scenario: 24-bit delta-sigma ADC in portable multimeter measuring microvolt-level sensor signals. IC Role / Device Role / Timing Role: Provides stable 2.500V reference for ADC full-scale calibration and ratiometric sensor excitation. Use Value: 1.45μVP-P noise and 3ppm/°C tempco ensure <±1 LSB error over temperature and time - meeting Class A DMM accuracy standards. |
Use Scenario: Modular ATE channel card sourcing precision currents for semiconductor parametric testing. IC Role / Device Role / Timing Role: Serves as reference for programmable current source using external MOSFET and OUTF/OUTS feedback loop. Use Value: Force/sense architecture eliminates trace resistance error; ±10mA sink/source capability enables 100nA–10mA test ranges with <0.02% linearity. |
| Digital Voltmeters | Industrial Process Control |
|
Use Scenario: Benchtop DVM with auto-ranging and 7½-digit resolution requiring ultra-stable reference across measurement ranges. IC Role / Device Role / Timing Role: Primary reference for internal DAC-based voltage scaling and ADC reference switching network. Use Value: 20ppm/1000hr long-term stability and 20ppm thermal hysteresis ensure calibration validity for >1 year between adjustments. |
Use Scenario: Loop-powered 4–20mA transmitter in hazardous area with ambient temperature cycling from -40°C to +85°C. IC Role / Device Role / Timing Role: Supplies excitation voltage for RTD/thermocouple signal conditioning and ADC reference in isolated analog front-end. Use Value: Guaranteed -40°C to +125°C operation with 3ppm/°C tempco maintains <±0.005% span error across environmental stress testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR4525BRZ | 2.5V output, ±0.02% initial accuracy, 3ppm/°C tempco, but higher 1.75μVP-P noise and no NR pin. | Lacks noise reduction pin and force/sense outputs - unsuitable for ultra-low-noise or remote-sensing designs. | Select when board space is constrained (SOIC-8 same footprint) and noise below 1.5μVP-P is not required. |
| REF5025AIDR | 2.5V output, ±0.02% accuracy, 3ppm/°C tempco, 1.2μVP-P noise, but requires external 10μF bypass and no NR pin. | No integrated noise reduction or Kelvin sensing - demands more external components and layout care for equivalent performance. | Choose for TI ecosystem compatibility and lower cost where 0.25μVP-P noise advantage justifies added design effort. |
Compared with ADR4525BRZ and REF5025AIDR, the MAX6126AASA25+T uniquely integrates noise reduction (NR pin), force/sense outputs, and guaranteed 1.45μVP-P noise in a single SO-8 package - reducing BOM count and layout complexity for metrology-grade systems.
Availability
MAX6126AASA25+T is available at Aetrix Electronics and suitable for high-resolution data acquisition, automated test equipment, and industrial process control requiring stable component supply with automotive-grade reliability and traceable sourcing.
Supply support for MAX6126AASA25+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 precision analog and mixed-signal ICs for demanding industrial, automotive, and instrumentation applications.
The MAX6126 series targets ultra-high-accuracy voltage references where low noise, low tempco, and remote sensing are mandatory - specifically engineered for metrology, test equipment, and high-end sensor interfaces.
FAQ
What is the maximum load current supported by the MAX6126AASA25+T?
The MAX6126AASA25+T supports ±10mA load current - sourcing up to +10mA from OUTF and sinking up to -10mA into OUTF. Load regulation is specified at ≤25μV/mA for both sourcing and sinking, ensuring stable 2.500V output across its full current range. This capability enables direct drive of precision op-amp bias networks and moderate-current DAC references without external buffers.
Does the MAX6126AASA25+T require an external capacitor on the NR pin?
No - the NR pin on the MAX6126AASA25+T is optional. Connecting a 0.1μF capacitor reduces wideband noise from 75nV/√Hz to 45nV/√Hz and 0.1Hz–10Hz noise from 1.45μVP-P to 0.9μVP-P. If ultra-low noise is not required, NR may be left unconnected. The device functions correctly with NR open, retaining all other specifications including accuracy and tempco.
How does the force/sense architecture of the MAX6126AASA25+T improve accuracy?
The MAX6126AASA25+T uses separate OUTF (force) and OUTS (sense) outputs, along with GNDS, to implement true 4-wire Kelvin sensing. By routing OUTF to the load and returning the sense path via OUTS and GNDS to the exact load measurement point, voltage drops across PCB traces and connectors are excluded from regulation - preserving the ±0.02% initial accuracy even with 100mΩ trace resistance.
What is the minimum supply voltage required for the MAX6126AASA25+T to maintain regulation?
The MAX6126AASA25+T requires a minimum supply voltage of (VOUT + dropout voltage). For the 2.500V output, dropout is 60mV (typ) at 5mA, so VIN ≥ 2.56V ensures regulation. The datasheet guarantees operation down to VOUT + 200mV = 2.70V across full temperature and load conditions - making it compatible with single-cell Li-ion (2.7–4.2V) and 3.3V systems with margin.
Is the MAX6126AASA25+T qualified for automotive applications?
Yes - the MAX6126AASA25+T is explicitly rated for the automotive temperature range of -40°C to +125°C, with all key parameters (initial accuracy, tempco, noise, load regulation) guaranteed across this range. It meets AEC-Q100 stress test requirements for reliability and is commonly used in engine control units, battery management systems, and ADAS sensor interfaces where precision reference stability is mission-critical.
MAX6126AASA25+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.02%
- Temperature Coefficient:
- 5ppm/°C
- Noise - 0.1Hz to 10Hz:
- 1.45µVp-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-SOIC
MAX6126AASA25+T FAQ
1.How can I place an order for MAX6126AASA25+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6126AASA25+T 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 MAX6126AASA25+T reliable?
The price and inventory of MAX6126AASA25+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6126AASA25+T is usually 5 days.
3.What payment methods are accepted for MAX6126AASA25+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6126AASA25+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6126AASA25+T?
MAX6126AASA25+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6126AASA25+T 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 MAX6126AASA25+T?
For technical support, including MAX6126AASA25+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6126AASA25+T requirements.
6.How does Aetrix verify that MAX6126AASA25+T is sourced from the original manufacturer or authorized distributors?
All MAX6126AASA25+T 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 MAX6126AASA25+T meets industry standards.
7.What is the process for return or replacement of MAX6126AASA25+T?
All MAX6126AASA25+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6126AASA25+T, 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 MAX6126AASA25+T part is unused and in its original packaging.
Return procedure for MAX6126AASA25+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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