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Analog Devices Inc./Maxim Integrated MAX6126BASA25+T
- Part No.:
- MAX6126BASA25+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6126BASA25+T.pdf
- Description:
- IC VREF SERIES 0.06% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,783
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Product details
Overview
MAX6126BASA25+T from Maxim Integrated is a B-grade, 2.500V ultra-low-noise, high-precision series voltage reference with ±0.06% initial accuracy, 5ppm/°C max temperature coefficient (−40°C to +125°C), and 75nV/√Hz wideband noise (1kHz, no NR cap). It operates from 3.2V to 12.6V supply, delivers ±10mA load current, and serves as the stable reference in high-resolution ADCs, precision DACs, and ATE systems.
For engineers reviewing the MAX6126BASA25+T datasheet, MAX6126BASA25+T pinout, MAX6126BASA25+T application, or MAX6126BASA25+T equivalent, key selection criteria include its force/sense output architecture for remote sensing, 0.1μF–10μF capacitive-load stability, 200mV max dropout at 10mA, and automotive-grade −40°C to +125°C operation without external resistor biasing.
Technical Context
The MAX6126BASA25+T implements a curvature-corrected bandgap core with laser-trimmed thin-film resistors to achieve low thermal drift and high initial accuracy. Its proprietary low-noise architecture separates flicker and wideband noise paths, enabling 1.45μVP-P (0.1Hz–10Hz) and 75nV/√Hz (1kHz) performance without elevated quiescent current.
It features dual-output Kelvin connections (OUTF/OUTS and GNDS) for remote-sensing compensation of PCB trace resistance, and a dedicated NR pin supporting 0.1μF capacitor to reduce wideband noise to 45nV/√Hz and improve AC PSRR. Dropout is specified down to 200mV at 10mA load with guaranteed line regulation ≤23μV/V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±0.06% at +25°C - precise, factory-trimmed reference for 16-bit+ data converters. |
| Tempco (−40°C to +125°C) | 5ppm/°C max - ensures <±125μV drift over full automotive range, critical for industrial sensor front-ends. |
| Wideband Noise (1kHz) | 75nV/√Hz (no NR cap); 45nV/√Hz (with 0.1μF on NR) - enables low-noise signal chains in precision instrumentation. |
| Dropout Voltage | 0.2V max at 10mA - supports operation from 2.7V rails in battery-powered systems with minimal headroom. |
| Load Regulation | ≤25μV/mA sourcing/sinking - maintains stability under dynamic load changes in programmable current sources. |
| Quiescent Current | 380μA typical, ≤725μA over temperature - ultra-low power for always-on reference applications. |
| Capacitive Load Range | 0.1μF to 10μF - accommodates ceramic or tantalum bypassing without oscillation risk. |
Pinout & Package
MAX6126BASA25+T is housed in an 8-pin SO package (SOIC-8, 150mil width), RoHS-compliant and lead-free. Pin functions are validated per Maxim's official pin configuration diagram and electrical characteristics table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - NR | Noise Reduction input | Accepts 0.1μF capacitor to reduce wideband noise by 40% and improve transient PSRR; left floating if unused. |
| 2 - IN | Positive supply input | Operates from 3.2V to 12.6V; supplies internal regulator; requires local 0.1μF bypass to GND for stability. |
| 3 - GND | Power ground reference | Main return path for supply current; must be low-impedance and separated from GNDS in Kelvin layouts. |
| 4 - GNDS | Ground sense terminal | Connects to load-side ground point to cancel ground-path IR drop in precision remote-sensing applications. |
| 5, 8 - I.C. | Internally connected | No external connection permitted; electrically tied internally; must remain unconnected on PCB. |
| 6 - OUTS | Voltage sense output | Provides feedback path to internal error amplifier; connects directly to load-side reference node for Kelvin sensing. |
| 7 - OUTF | Voltage force output | Delivers regulated 2.500V to load; shorted to OUTS near load; bypassed with 0.1–10μF capacitor to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Force/Sense Output Architecture | Separate OUTF (current delivery) and OUTS/GNDS (voltage sensing) terminals enable true 4-wire Kelvin referencing to eliminate trace resistance errors. |
| Ultra-Low Flicker Noise | 1.45μVP-P (0.1Hz–10Hz) - minimizes low-frequency drift in DC-coupled precision measurement systems. |
| Low Dropout & Wide VIN Range | 200mV max dropout at 10mA with 3.2V–12.6V input - supports single-supply operation across diverse rail voltages. |
| Stable with Full Capacitor Range | Guaranteed stability from 0.1μF to 10μF output capacitance - eliminates need for external compensation networks. |
| Automotive Temperature Range | −40°C to +125°C operation with 5ppm/°C tempco - qualified for engine control, ADAS sensor modules, and industrial PLCs. |
Applications
| High-Resolution Data Acquisition | Automated Test Equipment (ATE) |
|---|---|
|
Use Scenario: 24-bit delta-sigma ADC in portable multimeter measuring microvolt-level signals. IC Role / Device Role / Timing Role: Primary voltage reference establishing absolute scale for analog-to-digital conversion. Use Value: ±0.06% initial accuracy and 5ppm/°C tempco ensure <±3 LSB error over temperature, meeting Class A metrology requirements. |
Use Scenario: Multi-channel parametric test system validating IC VREF pins under varying supply and thermal conditions. IC Role / Device Role / Timing Role: Stable, low-noise reference source for DUT biasing and measurement comparison. Use Value: 75nV/√Hz noise and 25μV/mA load regulation prevent measurement uncertainty during fast load switching. |
| Precision Current Sources | Industrial Process Control Transmitters |
|
Use Scenario: 4–20mA loop transmitter using OUTF/OUTS to drive MOSFET-based current sink with remote load sensing. IC Role / Device Role / Timing Role: Force-and-sense voltage reference setting exact current via precision shunt resistor. Use Value: Kelvin-connected outputs compensate for PCB trace resistance, maintaining <0.1% current accuracy over 10m cable runs. |
Use Scenario: Smart pressure transmitter in oil & gas field instrumentation requiring long-term stability in harsh environments. IC Role / Device Role / Timing Role: Primary reference for analog output stage and internal ADC used in self-calibration. Use Value: 20ppm/1000hr long-term stability and −40°C to +125°C rating ensure calibration integrity over 10+ year deployments. |
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, ±0.02% initial accuracy, 2ppm/°C max tempco, 1.75μVP-P noise, SOIC-8, but higher 950μA supply current. | Better accuracy/tempco, but unsuitable for ultra-low-power designs; lacks NR pin and force/sense outputs. | Choose ADR4525BRZ when ultimate initial accuracy and long-term stability outweigh power and layout flexibility needs. |
| REF5025AIDR | 2.5V, ±0.05% initial accuracy, 3ppm/°C max tempco, 5.6μVP-P noise, SOIC-8, 950μA supply current, no NR pin. | Lower noise floor than MAX6126BASA25+T above 10Hz, but significantly higher quiescent current and no remote-sensing capability. | Choose REF5025AIDR for high-speed, wideband applications where 1/f noise is less critical than broadband SNR. |
Compared with ADR4525BRZ and REF5025AIDR, MAX6126BASA25+T offers unique force/sense outputs for remote sensing, lower 380μA quiescent current, and a dedicated NR pin for configurable noise reduction-making it optimal for space-constrained, low-power, high-accuracy industrial and automotive systems where trace resistance compensation is essential.
Availability
MAX6126BASA25+T is available at Aetrix Electronics and suitable for high-resolution data acquisition, automated test equipment, and precision current source applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6126BASA25+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, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX6126 family was engineered specifically for ultra-high-accuracy, ultra-low-noise voltage referencing in data converter systems, ATE, and process control-emphasizing Kelvin sensing, wide supply range, and configurable noise performance.
FAQ
What is the maximum allowable supply voltage for MAX6126BASA25+T?
The MAX6126BASA25+T supports a supply voltage range of 3.2V to 12.6V, as specified in its Electrical Characteristics table for the 2.500V output variant. Operation beyond 12.6V violates Absolute Maximum Ratings and may cause permanent damage. The device remains functional down to 3.2V while maintaining full 2.500V output regulation and load capability up to ±10mA.
Does MAX6126BASA25+T require an external resistor for biasing?
No, MAX6126BASA25+T is a series-mode voltage reference and does not require an external bias resistor. Unlike shunt references, its quiescent supply current (380μA typical) is virtually independent of supply voltage and load, eliminating resistor selection, power dissipation, and accuracy trade-offs associated with two-terminal devices.
How does the NR pin function in MAX6126BASA25+T?
The NR (Noise Reduction) pin on MAX6126BASA25+T accepts a 0.1μF capacitor to reduce wideband noise from 75nV/√Hz to 45nV/√Hz at 1kHz and improve AC power-supply rejection. When used, it also lowers 0.1Hz–10Hz flicker noise to 0.9μVP-P. Leaving NR unconnected retains baseline noise performance without affecting regulation or stability.
Can MAX6126BASA25+T drive a 10μF output capacitor?
Yes, MAX6126BASA25+T is explicitly characterized and guaranteed stable with output capacitance from 0.1μF to 10μF. This allows use of bulk ceramic/tantalum combinations-for example, 10μF in parallel with 0.1μF-to suppress both low-frequency ripple and high-frequency transients in precision current-source or DAC reference applications.
What is the purpose of separate OUTF and OUTS pins on MAX6126BASA25+T?
The OUTF (force) and OUTS (sense) pins implement a Kelvin connection: OUTF delivers current to the load, while OUTS feeds back the voltage at the load point. Shorting them near the load cancels voltage drop across PCB traces, enabling sub-0.01% accuracy in remote-sensing configurations-critical for 4–20mA transmitters and high-precision shunt-based current sources.
MAX6126BASA25+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:
- ±0.06%
- 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+T FAQ
1.How can I place an order for MAX6126BASA25+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6126BASA25+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 MAX6126BASA25+T reliable?
The price and inventory of MAX6126BASA25+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6126BASA25+T is usually 5 days.
3.What payment methods are accepted for MAX6126BASA25+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6126BASA25+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6126BASA25+T?
MAX6126BASA25+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6126BASA25+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 MAX6126BASA25+T?
For technical support, including MAX6126BASA25+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6126BASA25+T requirements.
6.How does Aetrix verify that MAX6126BASA25+T is sourced from the original manufacturer or authorized distributors?
All MAX6126BASA25+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 MAX6126BASA25+T meets industry standards.
7.What is the process for return or replacement of MAX6126BASA25+T?
All MAX6126BASA25+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6126BASA25+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 MAX6126BASA25+T part is unused and in its original packaging.
Return procedure for MAX6126BASA25+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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