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Analog Devices Inc./Maxim Integrated MAX6126BASA21+T
- Part No.:
- MAX6126BASA21+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6126BASA21+T.pdf
- Description:
- IC VREF SERIES 0.06% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,624
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Product details
Overview
MAX6126BASA21+T from Maxim Integrated is a precision series voltage reference delivering 2.048V output with ±0.06% initial accuracy, 5ppm/°C max temperature coefficient (−40°C to +125°C), and ultra-low 1.3μVP-P (0.1Hz–10Hz) flicker noise. It operates from 2.7V to 12.6V supply, supports ±10mA load current, and is used in high-resolution ADC/DAC biasing where long-term stability and low-noise performance are critical.
For engineers reviewing the MAX6126BASA21+T datasheet, MAX6126BASA21+T pinout, MAX6126BASA21+T application, or MAX6126BASA21+T equivalent, key selection criteria include its force/sense output architecture for remote sensing, 200mV max dropout at 10mA, 0.1μF–10μF capacitive-load stability, and automotive-grade −40°C to +125°C operation without external resistor requirements.
Technical Context
The MAX6126BASA21+T implements a curvature-corrected bandgap core with laser-trimmed thin-film resistors to achieve 5ppm/°C tempco over the full automotive range. Its proprietary low-noise architecture separates flicker and wideband noise paths, enabling 1.3μVP-P (0.1Hz–10Hz) and 60nV/√Hz (1kHz, no NR cap) without elevated quiescent current.
It features dual-output Kelvin connections (OUTF/OUTS and GND/GNDS) for remote-sensing compensation of PCB trace resistance, and a dedicated NR pin allowing 0.1μF capacitor to reduce wideband noise to 35nV/√Hz and 0.1Hz–10Hz noise to 0.9μVP-P. Load regulation is specified at ≤25μV/mA across ±10mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048V - precisely matches 12-bit DAC/ADC full-scale binary scaling (211 × 1mV). |
| Initial Accuracy | ±0.06% - guarantees ≤±1.23mV absolute error at +25°C, eliminating post-calibration in mid-accuracy systems. |
| Tempco (−40°C to +125°C) | 5ppm/°C max - contributes ≤±1.02mV drift over full range, critical for industrial sensor front-ends. |
| Low-Frequency Noise | 1.3μVP-P (0.1Hz–10Hz) - enables <20-bit effective resolution in precision digitizers without averaging. |
| Dropout Voltage | 200mV max at 10mA - allows operation from 2.248V supply, supporting low-voltage battery-powered instrumentation. |
| Quiescent Current | 380μA typical - stable across 2.7V–12.6V input, simplifying power budgeting in mixed-supply systems. |
| Load Regulation | 25μV/mA max - ensures ≤±250μV shift from 0 to 10mA sourcing/sinking, vital for precision current sources. |
Pinout & Package
MAX6126BASA21+T is housed in an 8-pin SO package (SOIC-8), surface-mount, RoHS-compliant, with standard 1.27mm pitch and exposed pad not present. 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, 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 60nV/√Hz to 35nV/√Hz and 0.1Hz–10Hz noise to 0.9μVP-P. |
| IN (Pin 2) | Positive supply input | Operates from 2.7V to 12.6V; supply current remains stable (380μA typ) with only 2μA/V variation. |
| GND (Pin 3) | Power ground return | Primary ground reference for internal circuitry; separate from GNDS to enable Kelvin sensing. |
| GNDS (Pin 4) | Ground sense terminal | Connects to load-side ground point to cancel voltage drop in ground return path (Kelvin configuration). |
| OUTS (Pin 6) | Voltage sense output | Provides feedback to internal regulator; connect directly to load reference node for accurate remote voltage setting. |
| OUTF (Pin 7) | Voltage force output | Delivers regulated current to load; short to OUTS near load to minimize IR drop impact on accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| Force/Sense Output Architecture | Separates OUTF (current delivery) and OUTS (voltage sensing) to eliminate PCB trace IR errors in remote loads. |
| Ultra-Low Flicker Noise | 1.3μVP-P (0.1Hz–10Hz) enables high-resolution DC measurements without excessive signal averaging. |
| Automotive Temperature Range | Specified from −40°C to +125°C with 5ppm/°C max tempco, supporting under-hood and industrial control applications. |
| Capacitive-Load Stability | Stable with 0.1μF to 10μF output capacitance-no minimum ESR requirement simplifies bypass design. |
| Low Dropout Operation | 200mV max dropout at 10mA allows use with low-headroom supplies like LiFePO4 batteries (2.8V–3.6V). |
Applications
| High-Resolution Data Acquisition | Precision Current Sources |
|---|---|
|
Use Scenario: 24-bit sigma-delta ADC front-end in portable environmental sensor nodes. IC Role / Device Role / Timing Role: Provides stable 2.048V reference for ADC VREF input and analog front-end biasing. Use Value: 1.3μVP-P noise and 5ppm/°C tempco ensure <22-bit effective resolution without calibration across temperature. |
Use Scenario: Programmable 4–20mA transmitter with HART modulation capability. IC Role / Device Role / Timing Role: Serves as precision voltage source for op-amp-based current mirror control loop. Use Value: Force/sense outputs compensate for PCB trace resistance, maintaining ±0.1% current accuracy over 10m cable runs. |
| Digital Voltmeters | Industrial Process Control |
|
Use Scenario: Benchtop 6½-digit DVM requiring sub-10ppm absolute accuracy. IC Role / Device Role / Timing Role: Primary reference for dual-slope integrator and auto-zero amplifier stages. Use Value: 0.06% initial accuracy and 20ppm/1000hr long-term stability reduce annual recalibration frequency. |
Use Scenario: PLC analog input module measuring thermocouple and RTD signals in factory automation. IC Role / Device Role / Timing Role: Reference for multiplexed 16-bit SAR ADCs and isolated current-loop receivers. Use Value: −40°C to +125°C operation and 25μV/mA load regulation ensure consistent channel-to-channel matching across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR4520BRZ | 2.048V, ±0.02% initial accuracy, 3ppm/°C max tempco, 0.95μVP-P noise, SO-8 package. | Higher accuracy and lower noise, but 450μA quiescent current and no NR pin or force/sense outputs. | Select when ultimate initial accuracy and noise performance outweigh need for remote sensing or low IQ. |
| REF5020AIDR | 2.048V, ±0.05% initial accuracy, 3ppm/°C max tempco, 1.2μVP-P noise, SO-8 package, no NR pin. | Lacks noise-reduction pin and force/sense architecture; requires external Kelvin wiring for remote sensing. | Choose for cost-sensitive designs needing better tempco than MAX6126BASA21+T but without NR or dual-output flexibility. |
Compared with ADR4520BRZ and REF5020AIDR, MAX6126BASA21+T uniquely combines automotive-grade tempco, integrated noise reduction, and true Kelvin force/sense outputs-enabling high-accuracy remote biasing without added components or layout complexity.
Availability
MAX6126BASA21+T is available at Aetrix Electronics and suitable for high-resolution data acquisition, precision current sources, digital voltmeters, and industrial process control applications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX6126BASA21+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 in industrial, automotive, and communications markets.
The MAX6126 series was engineered specifically for ultra-high-precision, ultra-low-noise voltage referencing in demanding measurement and control systems-prioritizing long-term stability, thermal hysteresis minimization, and flexible output architectures.
FAQ
What is the maximum operating temperature range for MAX6126BASA21+T?
The MAX6126BASA21+T is rated for continuous operation from −40°C to +125°C, meeting automotive AEC-Q100 Grade 1 requirements. Its 5ppm/°C max temperature coefficient is guaranteed across this full range, and thermal hysteresis is limited to 35ppm in the SO package-making it suitable for under-hood and industrial environments where ambient temperatures fluctuate widely.
Does MAX6126BASA21+T require an external resistor for operation?
No, MAX6126BASA21+T does not require an external resistor. As a series-mode voltage reference, it draws a nearly constant 380μA supply current independent of input voltage (2.7V–12.6V) and load conditions-unlike shunt-mode references that mandate external current-setting resistors and waste supply current. This simplifies design and improves power efficiency.
How does the NR pin on MAX6126BASA21+T improve noise performance?
The NR (Noise Reduction) pin on MAX6126BASA21+T accepts a 0.1μF capacitor to reduce wideband noise from 60nV/√Hz to 35nV/√Hz at 1kHz and low-frequency noise from 1.3μVP-P to 0.9μVP-P (0.1Hz–10Hz). This passive filtering enhances dynamic performance without increasing quiescent current or requiring active circuitry-critical for high-SNR signal chains.
Can MAX6126BASA21+T drive a 10μF output capacitor?
Yes, MAX6126BASA21+T is fully stable with output capacitance ranging from 0.1μF to 10μF-no minimum ESR requirement. Using 10μF improves transient response during rapid load changes (e.g., SAR ADC sampling bursts), while pairing it with a 0.1μF ceramic capacitor provides broadband decoupling. The device's internal compensation eliminates need for external compensation networks.
What is the purpose of the separate GNDS and GND pins on MAX6126BASA21+T?
The GNDS (ground sense) and GND (power ground) pins on MAX6126BASA21+T enable true 4-wire Kelvin sensing of both output voltage and ground return path. Connecting GNDS directly to the load's ground reference point cancels voltage drop across PCB traces or connectors-ensuring the internal regulator sees the exact load-side potential. This maintains ±0.06% accuracy even with 100mΩ of ground path resistance.
MAX6126BASA21+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):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.06%
- Temperature Coefficient:
- 10ppm/°C
- Noise - 0.1Hz to 10Hz:
- 1.3µVp-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
MAX6126BASA21+T FAQ
1.How can I place an order for MAX6126BASA21+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6126BASA21+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 MAX6126BASA21+T reliable?
The price and inventory of MAX6126BASA21+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6126BASA21+T is usually 5 days.
3.What payment methods are accepted for MAX6126BASA21+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6126BASA21+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6126BASA21+T?
MAX6126BASA21+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6126BASA21+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 MAX6126BASA21+T?
For technical support, including MAX6126BASA21+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6126BASA21+T requirements.
6.How does Aetrix verify that MAX6126BASA21+T is sourced from the original manufacturer or authorized distributors?
All MAX6126BASA21+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 MAX6126BASA21+T meets industry standards.
7.What is the process for return or replacement of MAX6126BASA21+T?
All MAX6126BASA21+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6126BASA21+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 MAX6126BASA21+T part is unused and in its original packaging.
Return procedure for MAX6126BASA21+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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