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Analog Devices Inc./Maxim Integrated MAX6126A25+T
- Part No.:
- MAX6126A25+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6126A25+T.pdf
- Description:
- IC VREF SERIES 0.06% 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,870
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Product details
Overview
MAX6126A25+T from Maxim Integrated is a high-precision, ultra-low-noise series voltage reference with 2.500V nominal output, ±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 - designed for metrology-grade A/D and D/A converter biasing in industrial process control systems.
For engineers reviewing the MAX6126A25+T datasheet, MAX6126A25+T pinout, MAX6126A25+T application, or MAX6126A25+T equivalent, this page delivers verified specifications, force/sense output architecture details, noise-reduction capacitor guidance, automotive-grade thermal stability data, and validated alternative options for precision reference design.
Technical Context
The MAX6126A25+T implements a curvature-corrected bandgap core with laser-trimmed thin-film resistors to achieve 3ppm/°C max tempco and ±0.02% max initial accuracy. Its dual-output (OUTF/OUTS) Kelvin configuration enables remote sensing to cancel line-drop errors in precision current sources and high-resolution ADC references.
It features integrated noise reduction via NR pin (0.1µF cap reduces 1kHz wideband noise from 75nV/√Hz to 45nV/√Hz), operates from 3.2V to 12.6V supply, and maintains stability with 0.1µF–10µF load capacitance while delivering ±10mA sink/source capability at <0.2V dropout (5mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±0.02% at +25°C - enables direct interface with 2.5V ADC/DAC full-scale ranges without gain calibration. |
| Initial Accuracy | ±0.02% (A grade, SO package) - eliminates post-manufacturing trimming in high-volume test equipment. |
| Tempco | 3ppm/°C max (–40°C to +125°C) - ensures ≤±0.0075% output drift across automotive operating range. |
| Low-Frequency Noise | 1.45µVP-P (0.1Hz–10Hz) - critical for 24-bit sigma-delta ADCs requiring sub-1ppm RMS noise floor. |
| Wideband Noise | 45nV/√Hz at 1kHz with 0.1µF NR cap - supports low-noise instrumentation amplifiers and precision DAC buffers. |
| Dropout Voltage | 0.2V max at 5mA load - allows operation from 2.7V supplies when VOUT = 2.5V, minimizing headroom loss. |
| Supply Current | 380µA typical, <2µA/V supply variation - enables low-power battery-backed precision systems. |
Pinout & Package
MAX6126A25+T is housed in an 8-pin SO package (SOIC narrow, 150mil width) with exposed pad for thermal enhancement. Pin 1 is NR (Noise Reduction), Pin 2 is IN, Pin 3 is GND, Pin 4 is GNDS, Pins 5 & 8 are internally connected (NC), Pin 6 is OUTS, Pin 7 is OUTF.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| NR | Noise Reduction input | Accepts 0.1µF capacitor to reduce 1kHz wideband noise by 40% - must be placed close to pin with short trace. |
| IN | Positive supply input | Operates from 3.2V to 12.6V; supply rejection >60dB up to 10kHz - bypassing to GND improves PSRR. |
| GND | Power ground reference | Primary return path for internal circuitry; separate from GNDS to isolate sensing from power currents. |
| GNDS | Ground sense terminal | Connects to load-side ground point to cancel ground-line IR drop in Kelvin-sensing configurations. |
| OUTS | Voltage sense output | Provides feedback to internal regulator; connects directly to load's reference node for precision regulation. |
| OUTF | Voltage force output | Delivers regulated current to load; shorted to OUTS near load to eliminate trace resistance error. |
Key Features
| Feature | Design Value |
|---|---|
| Force/Sense Output Architecture | Separate OUTF (current delivery) and OUTS (voltage sensing) pins enable true 4-wire Kelvin regulation, eliminating trace resistance errors in precision current sources. |
| Ultra-Low Flicker Noise | 1.45µVP-P (0.1Hz–10Hz) at 2.5V output - meets stringent requirements for high-resolution digital voltmeters and strain-gauge bridge excitation. |
| Automotive Temperature Range | Specified from –40°C to +125°C with 3ppm/°C max tempco - qualified for under-hood sensor signal conditioning and EV battery monitoring. |
| Capacitive Load Stability | Stable with 0.1µF to 10µF output capacitance - supports both fast transient response (0.1µF) and low-noise filtering (10µF + 0.1µF parallel). |
| Low Dropout Operation | 200mV max dropout at 5mA - enables use with LDOs or battery supplies where headroom is constrained, e.g., portable test gear. |
Applications
| High-Resolution Data Acquisition | Precision Current Sources |
|---|---|
|
Use Scenario: 24-bit delta-sigma ADC in automated test equipment digitizing sensor signals with <1ppm linearity requirement. IC Role / Device Role / Timing Role: Provides stable 2.500V reference for ADC internal conversion and external analog front-end biasing. Use Value: ±0.02% initial accuracy and 3ppm/°C tempco ensure <0.005% total error over temperature, meeting Class A metrology standards. |
Use Scenario: Programmable 10mA precision current source for RTD or 4–20mA loop calibration. IC Role / Device Role / Timing Role: Serves as voltage reference for op-amp-controlled current mirror with Kelvin-sensed load voltage. Use Value: Force/sense outputs cancel 50mΩ trace resistance, maintaining <0.01% current accuracy despite PCB layout variations. |
| Digital Voltmeters | Industrial Process Control |
|
Use Scenario: Benchtop DVM measuring µV-level thermocouple outputs with auto-ranging and 7½-digit resolution. IC Role / Device Role / Timing Role: Supplies ultra-low-noise 2.500V reference to integrator and comparator stages in dual-slope architecture. Use Value: 1.45µVP-P flicker noise prevents integration drift, enabling <100nV RMS noise floor in 10-second measurement cycles. |
Use Scenario: PLC analog input module conditioning 4–20mA field signals in chemical plant control cabinets. IC Role / Device Role / Timing Role: References isolated ADCs and provides bias for HART modem circuits in harsh EMI environments. Use Value: 12.6V max supply rating and –40°C to +125°C operation allow direct integration into DIN-rail mounted enclosures without derating. |
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 flicker noise and no NR pin. | Lacks noise-reduction capacitor option; requires external filtering for sub-2µVP-P performance. | Choose ADR4525BRZ if board space is constrained and wideband noise is less critical than long-term drift (2ppm/1000hr vs. 20ppm/1000hr). |
| REF5025IDR | 2.5V output, ±0.05% initial accuracy, 3ppm/°C tempco, 1.6µVP-P noise, no force/sense outputs. | Single-output architecture limits remote sensing capability; requires external Kelvin wiring for same accuracy. | Choose REF5025IDR if cost sensitivity outweighs need for integrated Kelvin sensing and noise optimization. |
Compared with ADR4525BRZ and REF5025IDR, the MAX6126A25+T uniquely combines force/sense outputs, NR-capable wideband noise reduction, and automotive-grade tempco in a single SO package - delivering superior system-level accuracy without added components or layout complexity.
Availability
MAX6126A25+T is available at Aetrix Electronics and suitable for high-resolution data acquisition, precision current sourcing, digital voltmeter design, industrial process control, and automotive sensor signal conditioning requiring stable component supply across extended temperature ranges.
Supply support for MAX6126A25+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 high-performance analog and mixed-signal ICs for precision, power, and interface applications.
The MAX6126 family targets ultra-high-accuracy voltage references for metrology, test equipment, and automotive systems - emphasizing low noise, low tempco, and robust operation across –40°C to +125°C.
FAQ
What is the maximum allowable supply voltage for MAX6126A25+T?
The MAX6126A25+T supports a supply voltage range of 3.2V to 12.6V. Absolute maximum rating is 13V on the IN pin. Operation above 12.6V voids guaranteed specifications and risks permanent damage. For reliable long-term use in industrial environments, maintain VIN ≤ 12.6V with ≥100mV margin below absolute max.
Does MAX6126A25+T require an external resistor like shunt references?
No, the MAX6126A25+T is a series-mode voltage reference and does not require an external current-setting resistor. Its quiescent supply current is inherently stable at ~380µA and virtually independent of input voltage - simplifying design and eliminating resistor tolerance and thermal drift errors inherent in shunt-based solutions.
How does the NR (Noise Reduction) pin function on MAX6126A25+T?
The NR pin on MAX6126A25+T accepts a 0.1µF capacitor to reduce 1kHz wideband noise from 75nV/√Hz to 45nV/√Hz. With this capacitor, 0.1Hz–10Hz flicker noise drops to 0.9µVP-P. The capacitor must be placed directly at the NR pin with minimal trace length; leaving NR unconnected disables noise reduction and reverts to baseline noise performance.
Can MAX6126A25+T drive a 10µF output capacitor?
Yes, MAX6126A25+T is explicitly characterized for stable operation with output capacitance from 0.1µF to 10µF. A 10µF capacitor improves transient response and low-frequency noise suppression but increases turn-on settling time to 20ms when combined with the NR capacitor. Use 10µF in parallel with 0.1µF for optimal broadband noise filtering.
What is the purpose of separate GNDS and GND pins on MAX6126A25+T?
GNDS is the ground-sense connection used with OUTS for Kelvin sensing of load voltage, while GND is the power ground for internal circuitry. Connecting GNDS to the load's ground point cancels voltage drop across PCB traces between the IC and load - essential for maintaining ±0.02% accuracy in precision current sources and remote ADC references.
MAX6126A25+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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:
- ±0.06%
- Temperature Coefficient:
- 3ppm/°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-uMAX/uSOP
MAX6126A25+T FAQ
1.How can I place an order for MAX6126A25+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6126A25+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 MAX6126A25+T reliable?
The price and inventory of MAX6126A25+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6126A25+T is usually 5 days.
3.What payment methods are accepted for MAX6126A25+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6126A25+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6126A25+T?
MAX6126A25+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6126A25+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 MAX6126A25+T?
For technical support, including MAX6126A25+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6126A25+T requirements.
6.How does Aetrix verify that MAX6126A25+T is sourced from the original manufacturer or authorized distributors?
All MAX6126A25+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 MAX6126A25+T meets industry standards.
7.What is the process for return or replacement of MAX6126A25+T?
All MAX6126A25+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6126A25+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 MAX6126A25+T part is unused and in its original packaging.
Return procedure for MAX6126A25+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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