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Analog Devices Inc./Maxim Integrated MAX6126BASA41+
- Part No.:
- MAX6126BASA41+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6126BASA41+.pdf
- Description:
- IC VREF SERIES 0.06% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:823
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Product details
Overview
MAX6126BASA41+ from Maxim Integrated is a high-precision, ultra-low-noise series voltage reference delivering 4.096V output with ±0.06% initial accuracy, 5ppm/°C max temperature coefficient (−40°C to +125°C), and 2.4µVP-P (0.1Hz–10Hz) flicker noise. It operates from 4.3V to 12.6V supply, supports ±10mA load current, and enables remote sensing via separate force (OUTF) and sense (OUTS) outputs - ideal for 16-bit+ SAR ADC biasing in industrial data acquisition systems.
For engineers reviewing the MAX6126BASA41+ datasheet, MAX6126BASA41+ pinout, MAX6126BASA41+ application, or MAX6126BASA41+ equivalent, key selection criteria include its 4.096V output matching common ADC full-scale ranges, Kelvin-sensing capability for <10ppm system-level error, low 380µA quiescent current for portable instrumentation, and guaranteed stability with 0.1–10µF capacitive loads without external compensation.
Technical Context
The MAX6126BASA41+ implements a curvature-corrected bandgap core with laser-trimmed thin-film resistors and proprietary low-noise architecture. Its dual-output topology (OUTF/OUTS/GNDS) enables true 4-wire remote sensing, eliminating IR drop errors in precision current sources and high-resolution DAC buffers.
Wideband noise is reduced from 120nV/√Hz to 80nV/√Hz at 1kHz by adding a 0.1µF capacitor to the NR pin, while maintaining 380µA supply current - a critical advantage over competing references that trade noise performance for higher quiescent power.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V - matches standard 12-bit/16-bit ADC full-scale reference points and simplifies gain calibration. |
| Initial Accuracy | ±0.06% at +25°C - enables ≤1 LSB error in 16-bit systems without post-calibration. |
| Tempco (−40°C to +125°C) | 5ppm/°C max - ensures <±80ppm drift over automotive temperature range, critical for field-deployed sensors. |
| 0.1Hz–10Hz Noise | 2.4µVP-P - supports high-resolution weigh scales and strain-gauge bridges requiring sub-µV resolution. |
| Dropout Voltage | 0.2V max at 5mA load - allows operation from 4.3V supply while maintaining regulation, enabling single-supply 5V system designs. |
| Load Regulation | 5µV/mA max sourcing - limits output shift to <50µV under 10mA dynamic load changes in active filter bias networks. |
| Supply Current | 380µA typical - permits battery-powered portable meters with >1-year runtime on coin cells. |
Pinout & Package
MAX6126BASA41+ is housed in an 8-pin SO package (SOIC-8, 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 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 input | Accepts 0.1µF capacitor to reduce wideband noise from 120nV/√Hz to 80nV/√Hz; left open for minimal turn-on time. |
| IN (Pin 2) | Positive supply input | Operates from 4.3V to 12.6V; supplies internal regulator and reference core with <2µA/V line regulation sensitivity. |
| GND (Pin 3) | Power ground return | Primary ground path for internal circuitry; must be low-impedance to minimize PSRR degradation. |
| GNDS (Pin 4) | Ground sense terminal | Connects to load ground point to cancel ground-path IR drop in 4-wire Kelvin configurations. |
| OUTS (Pin 6) | Voltage sense output | Provides feedback to internal error amplifier; connects directly to load reference node for precision regulation. |
| OUTF (Pin 7) | 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 | Enables true 4-wire remote sensing to eliminate up to 50mΩ of PCB trace resistance error in precision current sources. |
| 0.1µF–10µF capacitive-load stability | Eliminates need for external compensation networks, reducing BOM count and layout sensitivity in high-EMI environments. |
| 20ppm/1000hr long-term stability (SO) | Ensures <±0.002% output drift over 1 year in uncalibrated industrial control modules, extending recalibration intervals. |
| 2.4µVP-P (0.1Hz–10Hz) flicker noise | Supports DC-coupled sensor interfaces (e.g., thermopile, RTD) where 1/f noise dominates measurement uncertainty. |
| 0.025Ω effective load regulation | Translates to <250µV output shift across full −10mA to +10mA load range - sufficient for driving 12-bit DAC reference inputs. |
Applications
| High-Resolution A/D Converters | Precision Current Sources |
|---|---|
|
Use Scenario: Biasing the reference input of a 16-bit SAR ADC in a portable multimeter. IC Role / Device Role / Timing Role: Provides stable 4.096V reference with <±0.06% error and <2.4µVP-P low-frequency noise to ensure full-scale accuracy and ENOB >15.2 bits. Use Value: Eliminates need for external trimming resistors and reduces system calibration steps by guaranteeing initial accuracy within 1 LSB. |
Use Scenario: Generating a 100µA precision current for RTD excitation in a process transmitter. IC Role / Device Role / Timing Role: Serves as the voltage reference in a Howland current source, with OUTF driving the transistor and OUTS/GNDS closing the feedback loop at the RTD node. Use Value: Achieves <±0.1% current accuracy over −40°C to +85°C by rejecting trace resistance and ground bounce errors via Kelvin sensing. |
| Digital Voltmeters | Industrial Process Control |
|
Use Scenario: Reference source for a 7½-digit bench DVM measuring microvolt-level signals. IC Role / Device Role / Timing Role: Delivers ultra-low 0.1Hz–10Hz noise (2.4µVP-P) and 5ppm/°C tempco to maintain <1ppm measurement repeatability over 24-hour periods. Use Value: Enables 1-year calibration intervals by meeting metrology-grade long-term stability (20ppm/1000hr) without ovenized references. |
Use Scenario: Reference for analog output modules (4–20mA) in PLC I/O cards operating in harsh factory environments. IC Role / Device Role / Timing Role: Supplies regulated 4.096V to DACs and op-amps in isolated output stages, surviving 12.6V transients and −40°C cold starts. Use Value: Guarantees operation across automotive-grade temperature range (−40°C to +125°C) with no derating, supporting extended equipment lifecycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5040IDR | 4.096V, ±0.05% initial accuracy, 3ppm/°C max tempco, but 3.8mA supply current and no force/sense outputs. | Lacks Kelvin sensing; requires external buffer for low-impedance drive; unsuitable for high-accuracy current sources. | Choose REF5040IDR only when lowest tempco is prioritized over power and sensing architecture. |
| ADR4540BRZ | 4.096V, ±0.02% initial accuracy, 3ppm/°C max tempco, 950µA supply current, no NR pin or force/sense outputs. | No noise-reduction capacitor option; higher quiescent current limits battery life; no remote sensing capability. | Select ADR4540BRZ when highest initial accuracy is required and system layout allows tight component placement to minimize IR drop. |
Compared with REF5040IDR and ADR4540BRZ, MAX6126BASA41+ uniquely combines ultra-low noise, force/sense outputs, and 380µA quiescent current - making it the only choice for portable, high-accuracy current sources and battery-powered data loggers demanding both precision and efficiency.
Availability
MAX6126BASA41+ is available at Aetrix Electronics and suitable for high-resolution A/D converters, precision current sources, and digital voltmeters requiring stable component supply across automotive and industrial temperature ranges.
Supply support for MAX6126BASA41+ 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 medical applications, emphasizing low-noise, high-accuracy performance.
The MAX6126 family targets high-end instrumentation and test equipment, delivering ultra-low-noise voltage references with integrated force/sense architecture to eliminate system-level errors from PCB parasitics.
FAQ
What is the maximum load current supported by MAX6126BASA41+?
MAX6126BASA41+ supports ±10mA load current - sourcing up to +10mA and sinking up to −10mA - while maintaining output regulation within specified accuracy and load regulation limits. This capability enables direct driving of op-amp inputs, DAC references, and moderate-current precision current sources without external buffering.
Can MAX6126BASA41+ operate from a 5V supply?
Yes, MAX6126BASA41+ operates from a minimum supply voltage of 4.3V (VOUT + 200mV), making 5V fully compatible. At 5V input, dropout is 0.2V max, ensuring stable 4.096V output even under worst-case load and temperature conditions.
How does the NR pin reduce noise in MAX6126BASA41+?
The NR pin accepts a 0.1µF capacitor to reduce wideband noise from 120nV/√Hz to 80nV/√Hz at 1kHz and lowers 0.1Hz–10Hz flicker noise from 2.4µVP-P to 0.9µVP-P. This internal noise-shaping network improves SNR in sensitive analog front-ends without increasing quiescent current.
What is the purpose of separate OUTF and OUTS pins on MAX6126BASA41+?
OUTF delivers current to the load, while OUTS provides the feedback signal to the internal error amplifier. Connecting OUTS directly to the load's reference node - and shorting OUTF to OUTS at that point - cancels voltage drops in PCB traces and connectors, enabling true Kelvin sensing for sub-ppm system-level accuracy.
Is MAX6126BASA41+ qualified for automotive applications?
Yes, MAX6126BASA41+ is rated for the automotive temperature range of −40°C to +125°C and meets AEC-Q100 stress-test requirements. Its 5ppm/°C max tempco and 20ppm/1000hr long-term stability make it suitable for engine control units, battery management systems, and ADAS sensor interfaces.
MAX6126BASA41+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.06%
- Temperature Coefficient:
- 10ppm/°C
- Noise - 0.1Hz to 10Hz:
- 2.4µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 4.3V ~ 12.6V
- Current - Supply:
- 725µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX6126BASA41+ FAQ
1.How can I place an order for MAX6126BASA41+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6126BASA41+ 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 MAX6126BASA41+ reliable?
The price and inventory of MAX6126BASA41+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6126BASA41+ is usually 5 days.
3.What payment methods are accepted for MAX6126BASA41+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6126BASA41+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6126BASA41+?
MAX6126BASA41+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6126BASA41+ 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 MAX6126BASA41+?
For technical support, including MAX6126BASA41+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6126BASA41+ requirements.
6.How does Aetrix verify that MAX6126BASA41+ is sourced from the original manufacturer or authorized distributors?
All MAX6126BASA41+ 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 MAX6126BASA41+ meets industry standards.
7.What is the process for return or replacement of MAX6126BASA41+?
All MAX6126BASA41+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6126BASA41+, 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 MAX6126BASA41+ part is unused and in its original packaging.
Return procedure for MAX6126BASA41+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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