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Analog Devices Inc./Maxim Integrated MAX6126A50+
- Part No.:
- MAX6126A50+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6126A50+.pdf
- Description:
- IC VREF SERIES 0.06% 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,737
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Product details
Overview
MAX6126A50+ from Maxim Integrated is an ultra-high-precision, ultra-low-noise series voltage reference delivering a stable 5.000V output with ±0.02% (max) initial accuracy, 3ppm/°C (max) temperature coefficient over -40°C to +125°C, and 2.85µVP-P (0.1Hz–10Hz) flicker noise. It operates from 5.2V to 12.6V supply, supports ±10mA load current, and enables remote sensing via force/sense outputs - ideal for high-resolution ADCs in industrial process control systems.
For engineers reviewing the MAX6126A50+ datasheet, MAX6126A50+ pinout, MAX6126A50+ application, or MAX6126A50+ equivalent, this page provides verified specifications, package mapping, real-world use cases, and validated alternative options for precision analog signal chains requiring low drift, low noise, and automotive-grade reliability.
Technical Context
The MAX6126A50+ employs curvature-correction circuitry and laser-trimmed thin-film resistors to achieve 3ppm/°C max tempco and ±0.02% max initial accuracy. Its proprietary low-noise architecture delivers 145nV/√Hz wideband noise (1kHz, no NR cap) and reduces to 95nV/√Hz with 0.1µF on NR pin.
It features independent force (OUTF) and sense (OUTS) outputs plus ground-sense (GNDS) for Kelvin connections, enabling cancellation of trace resistance errors in precision current sources and high-accuracy DAC/ADC references. Dropout is as low as 50mV at 5mA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±0.02% at +25°C - ensures absolute accuracy for 16-bit+ data converters without calibration. |
| Tempco (–40°C to +125°C) | ≤3ppm/°C (A grade) - limits full-range drift to <±0.0015% across automotive temperature range. |
| Flicker Noise (0.1Hz–10Hz) | 2.85µVP-P - minimizes low-frequency error in precision weigh scales and sensor front-ends. |
| Wideband Noise (1kHz) | 145nV/√Hz (no NR cap); 95nV/√Hz (with 0.1µF NR) - critical for high-SNR spectral analysis systems. |
| Load Regulation | ≤50µV/mA sourcing - maintains stability under dynamic load changes in programmable current sources. |
| Dropout Voltage | 50mV (typ) at 5mA - enables operation with minimal headroom in low-voltage industrial power rails. |
| Supply Current | 380µA (typ), ≤725µA (–40°C to +125°C) - ultra-low quiescent draw for battery-backed instrumentation. |
Pinout & Package
MAX6126A50+ is available in an 8-pin SO package (SOIC) with exposed pad for thermal performance. 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 | Accepts 0.1µF capacitor to reduce 1kHz noise from 145nV/√Hz to 95nV/√Hz; left open if unused. |
| 2 - IN | Positive Supply Input | Operates from 5.2V to 12.6V; supplies internal bandgap and error amplifier; bypassing recommended. |
| 3 - GND | Power Ground | Main return path for supply current; separate from GNDS to avoid ground-loop errors. |
| 4 - GNDS | Ground Sense | Connects to load ground point to cancel ground trace IR drop in Kelvin configurations. |
| 5, 8 - I.C. | Internally Connected | No external connection; internally tied to GND or other nodes - must remain unconnected. |
| 6 - OUTS | Voltage Sense Output | Feedback node for regulation loop; connects directly to load reference point for accuracy. |
| 7 - OUTF | Voltage Force Output | Delivers regulated current to load; shorted to OUTS near load to enable 4-wire sensing. |
Key Features
| Feature | Design Value |
|---|---|
| Force/Sense Outputs (OUTF/OUTS + GNDS) | Enables true 4-wire Kelvin sensing to eliminate voltage drop errors in PCB traces and connectors. |
| Ultra-Low Flicker Noise | 2.85µVP-P (0.1Hz–10Hz) - preserves DC accuracy in digital voltmeters and strain-gauge amplifiers. |
| Low Dropout (50mV typ) | Allows operation with only 5.25V input for 5.000V output - essential for single-supply 5V systems. |
| Stable with 0.1µF–10µF Load Capacitance | Eliminates need for external compensation; supports ceramic or tantalum output caps without oscillation. |
| Automotive Temperature Range | –40°C to +125°C operation with guaranteed specs - qualified for under-hood and factory automation use. |
Applications
| High-Resolution A/D Converters | Precision Current Sources |
|---|---|
|
Use Scenario: Reference for 20-bit SAR ADC in automated test equipment requiring <±1 LSB error over temperature. IC Role / Device Role / Timing Role: Primary voltage reference providing stable 5.000V reference for ADC VREF input with force/sense routing to minimize layout-induced errors. Use Value: ±0.02% initial accuracy and 3ppm/°C tempco ensure <±0.002% total error across –40°C to +125°C, meeting 20-bit linearity requirements. |
Use Scenario: Programmable 4–20mA transmitter in hazardous-area process control loops. IC Role / Device Role / Timing Role: Precision voltage source driving MOSFET gate via OUTS/OUTF to generate accurate current through sense resistor. Use Value: Force/sense architecture cancels trace resistance up to 1Ω, maintaining ±0.1% current accuracy despite long PCB runs or connector contact resistance. |
| Digital Voltmeters | Industrial Process Control |
|
Use Scenario: Benchtop DVM with 7½-digit resolution measuring microvolt-level signals. IC Role / Device Role / Timing Role: Low-noise 5.000V reference for dual-slope integrator and auto-zero amplifier stages. Use Value: 2.85µVP-P flicker noise and 95nV/√Hz wideband noise prevent noise floor degradation in sub-µV measurements. |
Use Scenario: PLC analog input module conditioning thermocouple and RTD signals in chemical plants. IC Role / Device Role / Timing Role: Stable reference for sigma-delta ADCs and isolated current-loop drivers operating in EMI-heavy environments. Use Value: 145nV/√Hz noise (reducible to 95nV/√Hz) and >80dB PSRR suppress switching noise from nearby SMPS and motor drives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR4550BRZ | 5.0V output, ±0.02% initial accuracy, 3ppm/°C max tempco, but higher 3.75µVP-P flicker noise and no force/sense outputs. | Lacks Kelvin sensing capability; unsuitable where trace resistance exceeds 50mΩ. | Select when board space is constrained (SOT-23-5) and force/sense is not required. |
| REF5050IDR | 5.0V output, ±0.05% initial accuracy, 3ppm/°C max tempco, 3.5µVP-P noise, no NR pin or GNDS. | No noise reduction capacitor option; limited to 10mA sink/source vs. MAX6126A50+'s ±10mA bidirectional capability. | Choose for cost-sensitive designs where 0.05% accuracy suffices and wideband noise <100nV/√Hz is not mandatory. |
Compared with ADR4550BRZ and REF5050IDR, MAX6126A50+ uniquely combines force/sense outputs, 0.1µF NR-capable noise reduction, and guaranteed ±10mA bidirectional drive - making it the only option among the three qualified for high-accuracy, low-drift, low-noise industrial current-source and 20-bit ADC reference applications.
Availability
MAX6126A50+ is available at Aetrix Electronics and suitable for high-resolution data acquisition, precision current sourcing, and industrial process control systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6126A50+ 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 demanding industrial, automotive, and communications applications.
The MAX6126 family was engineered specifically for ultra-precision voltage referencing in metrology-grade instruments and high-bit-depth data converters - prioritizing low noise, low drift, and robustness in harsh thermal environments.
FAQ
What is the maximum supply voltage for MAX6126A50+?
The MAX6126A50+ supports a supply voltage range of 5.2V to 12.6V, with absolute maximum rating of +13V on the IN pin. Operation above 12.6V is not guaranteed and may degrade long-term stability or cause permanent damage. For reliable 5.000V output, VIN must exceed VOUT by at least 50mV (dropout) under all load and temperature conditions.
Does MAX6126A50+ require an external resistor like shunt references?
No, MAX6126A50+ 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 - eliminating design complexity and power waste associated with two-terminal shunt references.
Can MAX6126A50+ drive a 10µF output capacitor?
Yes, MAX6126A50+ is explicitly characterized for stable operation with 0.1µF to 10µF output capacitance. Using 10µF improves transient response for rapidly varying loads (e.g., switched-capacitor DACs), and pairing it with a 0.1µF ceramic cap mitigates high-frequency ringing while maintaining low impedance across the full frequency band.
How does the NR pin reduce noise in MAX6126A50+?
The NR pin on MAX6126A50+ accepts a 0.1µF capacitor to filter high-frequency noise from the internal reference core. This reduces wideband noise from 145nV/√Hz to 95nV/√Hz at 1kHz and lowers 0.1Hz–10Hz flicker noise from 2.85µVP-P to 0.9µVP-P, directly improving SNR in precision measurement circuits.
Is MAX6126A50+ qualified for automotive applications?
Yes, MAX6126A50+ is specified and tested over the full automotive temperature range of –40°C to +125°C, with guaranteed performance for initial accuracy (±0.02%), tempco (≤3ppm/°C), and long-term stability (20ppm/1000hr). It carries AEC-Q100 stress qualification and RoHS-compliant packaging (+ suffix).
MAX6126A50+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.06%
- Temperature Coefficient:
- 5ppm/°C
- Noise - 0.1Hz to 10Hz:
- 2.85µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 5.2V ~ 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
MAX6126A50+ FAQ
1.How can I place an order for MAX6126A50+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6126A50+ 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 MAX6126A50+ reliable?
The price and inventory of MAX6126A50+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6126A50+ is usually 5 days.
3.What payment methods are accepted for MAX6126A50+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6126A50+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6126A50+?
MAX6126A50+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6126A50+ 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 MAX6126A50+?
For technical support, including MAX6126A50+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6126A50+ requirements.
6.How does Aetrix verify that MAX6126A50+ is sourced from the original manufacturer or authorized distributors?
All MAX6126A50+ 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 MAX6126A50+ meets industry standards.
7.What is the process for return or replacement of MAX6126A50+?
All MAX6126A50+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6126A50+, 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 MAX6126A50+ part is unused and in its original packaging.
Return procedure for MAX6126A50+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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