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Analog Devices Inc./Maxim Integrated MAX6126BASA25
- Part No.:
- MAX6126BASA25
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6126BASA25.pdf
- Description:
- VOLTAGE REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:550
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Product details
Overview
MAX6126BASA25 from Maxim Integrated is an ultra-high-precision, ultra-low-noise series voltage reference delivering 2.500V output with ±0.06% initial accuracy, 5ppm/°C max temperature coefficient, and 1.45µVP-P (0.1Hz–10Hz) flicker noise. It operates from 3.2V 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 MAX6126BASA25 datasheet, MAX6126BASA25 pinout, MAX6126BASA25 application, or MAX6126BASA25 equivalent, key selection criteria include initial accuracy vs. tempco trade-off, force-sense output architecture for remote sensing, dropout voltage under sourcing conditions, and noise performance with/without NR capacitor.
Technical Context
The MAX6126BASA25 employs curvature-corrected bandgap architecture with laser-trimmed thin-film resistors to achieve 5ppm/°C (max) tempco over –40°C to +125°C. Its dual-output (OUTF/OUTS) force-sense topology enables Kelvin sensing to cancel trace resistance errors in precision current sources and high-accuracy measurement front-ends.
It features a dedicated NR pin enabling 0.1µF capacitor addition to reduce wideband noise from 75nV/√Hz to 45nV/√Hz at 1kHz while maintaining 380µA quiescent current. Load regulation is specified at ≤25µV/mA for sinking and sourcing up to ±10mA, with dropout as low as 0.11V at 5mA output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±0.06% at +25°C - defines reference level for 16-bit+ data converters with <1 LSB drift over temperature |
| Tempco (–40°C to +125°C) | 5ppm/°C max - ensures ≤±0.00125V drift across full automotive range, critical for industrial sensor calibration |
| Flicker Noise (0.1Hz–10Hz) | 1.45µVP-P - enables sub-20-bit effective resolution in precision digitizers without external filtering |
| Wideband Noise (1kHz, CNR=0) | 75nV/√Hz - sets floor for dynamic signal integrity in ATE and metrology applications |
| Dropout Voltage (5mA) | 0.06V min / 0.2V max - allows operation with only 2.56V input, supporting low-voltage battery-powered systems |
| Load Regulation | ≤25µV/mA - maintains <0.025% output change per mA load shift, essential for programmable current sources |
| Quiescent Current | 380µA typical - enables always-on reference in power-constrained IoT sensor nodes |
Pinout & Package
The MAX6126BASA25 is housed in an 8-pin SO package (SOIC-8, package code S8+4), with exposed pad not electrically connected. Pin 1 is NR (Noise Reduction), Pin 2 is IN, Pin 3 is GND, Pin 4 is GNDS, Pins 5 and 8 are internally connected (NC), Pin 6 is OUTS, and Pin 7 is OUTF.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| NR (Pin 1) | Noise reduction control | Accepts 0.1µF capacitor to reduce 1kHz noise by 40% - must be placed close to pin; floating if unused |
| IN (Pin 2) | Positive supply input | Accepts 3.2V–12.6V; supplies internal regulator - requires local 0.1µF bypass to GND |
| GND (Pin 3) | Power ground reference | Primary ground return for internal circuitry - separate from GNDS to enable Kelvin sensing |
| GNDS (Pin 4) | Ground sense terminal | Connects to load-side ground point to cancel ground path IR drop - forms 4-wire remote sense loop with OUTS |
| OUTS (Pin 6) | Voltage sense output | Feedback node for regulation - connects directly to load's reference input to eliminate trace resistance error |
| OUTF (Pin 7) | Force output driver | Delivers regulated current to load - shorted to OUTS near load; bypassed with 0.1–10µF capacitor to GND |
Key Features
| Feature | Design Value |
|---|---|
| Force-sense dual outputs (OUTF/OUTS) | Enables true 4-wire remote sensing to eliminate voltage drop errors in PCB traces or cables up to 100mΩ |
| Ultra-low 1.45µVP-P flicker noise | Supports DC-accurate measurements in digital voltmeters and strain-gauge bridges without chopper stabilization |
| 20ppm/1000hr long-term stability | Reduces recalibration frequency in laboratory equipment and automated test systems over multi-year deployments |
| Stable with 0.1µF–10µF output capacitance | Allows use of ceramic or tantalum capacitors for fast transient response in switching load applications |
| 0.025Ω max load regulation resistance | Ensures <0.25mV output shift at ±10mA load swing - critical for precision current mirror biasing |
Applications
| High-Resolution A/D Converters | ATE Equipment |
|---|---|
Use Scenario: Reference for 16-bit SAR ADC in portable multimeter design operating from single 3.3V rail. IC Role / Device Role / Timing Role: Provides stable 2.500V reference with <±0.06% error and 5ppm/°C drift to limit integral nonlinearity. Use Value: Enables guaranteed 15.8-bit ENOB across –20°C to +70°C without calibration, reducing BOM cost. | Use Scenario: Precision reference in automated test system channel card requiring 100ppm accuracy over 8-hour thermal soak. IC Role / Device Role / Timing Role: Supplies excitation voltage to DUT and reference to digitizer simultaneously via force-sense architecture. Use Value: Eliminates 200µV trace-drop error at 10mA load, improving measurement repeatability by 3× vs. single-output references. |
| Precision Current Sources | Digital Voltmeters |
Use Scenario: Bias generator for 4–20mA transmitter using MOSFET output stage with 0.1% shunt resistor. IC Role / Device Role / Timing Role: Sets current via VREF/RSENSE with OUTF driving gate and OUTS sensing source voltage. Use Value: Achieves ±0.05% current accuracy over temperature - meets IEC 61000-4-30 Class A requirements. | Use Scenario: Reference in handheld 6½-digit DVM where 10ppm/year drift impacts annual calibration validity. IC Role / Device Role / Timing Role: Primary voltage standard referenced against internal DAC and auto-zero amplifier. Use Value: 20ppm/1000hr long-term stability extends calibration interval from 6 to 12 months, cutting service cost. |
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, 2ppm/°C max tempco, but 3.6V min supply and no force-sense outputs | Lacks remote sensing capability - unsuitable for high-current or long-trace layouts | Select when highest initial accuracy and lowest tempco are prioritized over supply voltage headroom and layout flexibility |
| REF5025IDR | 2.5V output, ±0.05% initial accuracy, 3ppm/°C max tempco, 3.3V min supply, includes force-sense outputs | Lower noise (0.9µVP-P) but higher quiescent current (950µA) and larger SO-8 footprint | Select when lower flicker noise is critical and higher supply current is acceptable in space-constrained designs |
Compared with ADR4525BRZ and REF5025IDR, the MAX6126BASA25 offers the optimal balance of automotive-grade temperature range, force-sense capability, and ultra-low 380µA quiescent current - making it uniquely suited for battery-powered precision instruments with demanding layout constraints.
Availability
MAX6126BASA25 is available at Aetrix Electronics and suitable for high-resolution data acquisition, automated test equipment, and portable precision instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6126BASA25 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-stable voltage references optimized for metrology-grade accuracy, low-noise data conversion, and remote-sensing current sources in harsh environments.
FAQ
What is the maximum allowable input voltage for MAX6126BASA25?
The MAX6126BASA25 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 or accelerated parametric drift. For reliable long-term performance, maintain VIN ≤ 12.6V with appropriate derating for temperature and board-level transients.
Does MAX6126BASA25 require an external resistor like shunt references?
No, the MAX6126BASA25 is a series-mode voltage reference and does not require an external current-setting resistor. Its supply current remains virtually independent of input voltage (380µA typical), eliminating power waste and simplifying design versus two-terminal shunt references. This architecture also enables direct connection to low-impedance loads without stability concerns.
How does the force-sense (OUTF/OUTS) configuration improve accuracy in MAX6126BASA25?
The MAX6126BASA25 uses separate OUTF (force) and OUTS (sense) pins to implement true 4-wire Kelvin sensing. OUTF delivers current to the load, while OUTS samples voltage directly at the load node. This cancels voltage drop across PCB traces or cables between the IC and load - correcting errors up to 100mΩ × 10mA = 1mV, which would otherwise degrade 16-bit converter accuracy by >6 LSBs.
Can MAX6126BASA25 drive a 10µF output capacitor?
Yes, the MAX6126BASA25 is stable with output capacitance from 0.1µF to 10µF. A 10µF ceramic or tantalum capacitor improves transient response for rapidly varying loads (e.g., SAR ADC sampling bursts) and reduces high-frequency noise. However, turn-on settling time increases to ~4ms with 10µF vs. 200µs with 0.1µF - verify timing margins in your application.
What is the purpose of the NR pin on MAX6126BASA25?
The NR (Noise Reduction) pin on MAX6126BASA25 accepts a 0.1µF capacitor to reduce wideband noise from 75nV/√Hz to 45nV/√Hz at 1kHz. This capacitor filters internal reference noise without increasing quiescent current - unlike traditional low-noise references. Leaving NR unconnected retains baseline noise performance; larger capacitors (>0.1µF) yield diminishing returns.
MAX6126BASA25 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.06%
- Temperature Coefficient:
- 10ppm/°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
MAX6126BASA25 FAQ
1.How can I place an order for MAX6126BASA25 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6126BASA25 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 MAX6126BASA25 reliable?
The price and inventory of MAX6126BASA25 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6126BASA25 is usually 5 days.
3.What payment methods are accepted for MAX6126BASA25?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6126BASA25 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6126BASA25?
MAX6126BASA25 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6126BASA25 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 MAX6126BASA25?
For technical support, including MAX6126BASA25 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6126BASA25 requirements.
6.How does Aetrix verify that MAX6126BASA25 is sourced from the original manufacturer or authorized distributors?
All MAX6126BASA25 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 MAX6126BASA25 meets industry standards.
7.What is the process for return or replacement of MAX6126BASA25?
All MAX6126BASA25 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6126BASA25, 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 MAX6126BASA25 part is unused and in its original packaging.
Return procedure for MAX6126BASA25:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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