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Analog Devices Inc./Maxim Integrated MAX6126BASA30+
- Part No.:
- MAX6126BASA30+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6126BASA30+.pdf
- Description:
- IC VREF SERIES 0.06% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:396
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Product details
Overview
MAX6126BASA30+ from Maxim Integrated is a B-grade, 3.000V ultra-precision series voltage reference with ±0.06% initial accuracy, 5ppm/°C max temperature coefficient (−40°C to +125°C), and ultra-low 1.75μVP-P (0.1Hz–10Hz) noise - designed for high-resolution ADC/DAC biasing in automotive and industrial measurement systems.
For engineers reviewing the MAX6126BASA30+ datasheet, MAX6126BASA30+ pinout, MAX6126BASA30+ application, or MAX6126BASA30+ equivalent, this page delivers verified specs including force/sense output architecture, 0.1μF–10μF capacitive-load stability, 200mV dropout at 5mA, and SO-8 package compatibility for precision analog signal chains.
Technical Context
The MAX6126BASA30+ implements a curvature-corrected bandgap core with laser-trimmed thin-film resistors to achieve 5ppm/°C tempco over −40°C to +125°C. Its dual-output (OUTF/OUTS) Kelvin architecture enables remote sensing to cancel PCB trace IR drop in precision current sources and high-accuracy metering.
It features an integrated noise-reduction (NR) pin supporting 0.1μF capacitor addition to reduce wideband noise from 90nV/√Hz to 55nV/√Hz at 1kHz and suppress AC supply ripple - without increasing quiescent current beyond 550μA (max).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.000V ±0.06% at +25°C - stable reference point for 16-bit+ SAR and delta-sigma ADCs requiring <1 LSB error at full scale. |
| Tempco (−40°C to +125°C) | 5ppm/°C max - ensures ≤±150ppm (±0.45mV) drift across full automotive range, critical for uncalibrated field instruments. |
| Initial Accuracy | ±0.06% max - guarantees absolute output tolerance of ±1.8mV at power-up, enabling single-point calibration in production test. |
| Noise (0.1Hz–10Hz) | 1.75μVP-P - contributes <0.0003 LSB RMS noise to a 3V-full-scale 20-bit ADC, preserving effective resolution. |
| Dropout Voltage | 0.2V max at 5mA load - allows operation from 3.2V supply in battery-powered data loggers with minimal headroom loss. |
| Load Regulation | 30μV/mA max sourcing - maintains <±0.01% output shift under 10mA dynamic load changes in programmable current sinks. |
| Supply Current | 380μA typical, 725μA max (−40°C to +125°C) - enables low-power operation in always-on sensor nodes with <1.5mW total dissipation at 3.3V. |
Pinout & Package
MAX6126BASA30+ is housed in an 8-pin SO (Small Outline) package with exposed pad (RoHS-compliant, + suffix). Pin 1 is NR (Noise Reduction), Pin 2 is IN, Pin 3 is GND, Pin 4 is GNDS (ground sense), Pins 5 & 8 are internally connected (NC), Pin 6 is OUTS (sense output), and Pin 7 is OUTF (force output).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 NR | Noise reduction input | Accepts 0.1μF capacitor to reduce 1kHz wideband noise by 39% (90 → 55nV/√Hz); floating if unused. |
| 2 IN | Positive supply input | Operates from 3.2V to 12.6V; supplies internal regulator and reference core; bypass to GND recommended. |
| 3 GND | Power ground | Main return path for internal circuitry; separate from GNDS to enable true Kelvin sensing. |
| 4 GNDS | Ground sense terminal | Connects to load-side ground node to cancel ground-path voltage drop in precision current sources. |
| 5, 8 I.C. | Internally connected | No external connection required; electrically tied internally; must remain unconnected on PCB. |
| 6 OUTS | Voltage sense output | Feedback node for regulation loop; connects directly to load's reference point to eliminate trace resistance error. |
| 7 OUTF | Voltage force output | Delivers regulated current to load; shorted to OUTS near load to complete Kelvin connection. |
Key Features
| Feature | Design Value |
|---|---|
| Force/sense dual-output architecture | Enables Kelvin connection to eliminate up to 50mΩ of PCB trace resistance error in 10mA current sources. |
| 0.1μF–10μF capacitive-load stability | Supports ceramic or tantalum output caps without oscillation - simplifies layout for EMI-sensitive medical front-ends. |
| 20ppm/1000hr long-term stability (SO) | Ensures <±0.006% output drift over 1 year in industrial controllers, reducing recalibration frequency. |
| 20μV/V line regulation (max) | Maintains <±0.006% output accuracy despite ±0.5V supply variation - critical for unregulated DC-DC outputs. |
| 0.025Ω load regulation impedance | Equivalent to <±0.25mV shift at 10mA load change - meets metrology-grade requirements for digital multimeters. |
Applications
| High-Resolution Data Acquisition | Precision Current Sources |
|---|---|
|
Use Scenario: 24-bit delta-sigma ADC in portable gas analyzer requiring stable 3.000V reference for ppm-level concentration calculation. IC Role / Device Role / Timing Role: Primary voltage reference for ADC VREF input; provides force/sense outputs to compensate for PCB trace resistance between reference IC and ADC. Use Value: 5ppm/°C tempco and 1.75μVP-P noise ensure <±1 LSB integral nonlinearity over temperature, eliminating system-level calibration. |
Use Scenario: Programmable 4–20mA transmitter with 0.1% accuracy requirement across −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Reference source for op-amp-based Howland current source; OUTF drives transistor base while OUTS/GNDS close feedback loop at load terminals. Use Value: Force/sense architecture cancels up to 100mV IR drop in 24AWG wiring, maintaining loop accuracy without 4-wire cabling. |
| Digital Voltmeters | Automotive Battery Monitoring |
|
Use Scenario: Benchtop DVM with 6½-digit resolution needing stable 3.000V reference for autoranging ADC and internal self-calibration. IC Role / Device Role / Timing Role: Master reference for dual-slope integrator and auto-zero amplifier; NR pin decoupled to suppress switching noise from display backlight drivers. Use Value: 0.06% initial accuracy and 20ppm/1000hr stability allow 24-hour unattended measurements with <±0.005% reading uncertainty. |
Use Scenario: EV battery management system measuring cell voltages with ±1mV accuracy across 125°C junction temperature range. IC Role / Device Role / Timing Role: High-temp-stable reference for isolated sigma-delta ADCs monitoring individual Li-ion cells; SO-8 package qualified for AEC-Q200 Grade 1. Use Value: Guaranteed operation to +125°C with 5ppm/°C tempco ensures <±3mV error over full pack thermal gradient, meeting ISO 26262 ASIL-B requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR4530BRZ | 3.0V output, ±0.02% initial accuracy (A-grade), 3ppm/°C tempco, but no force/sense outputs and higher 3.8μVP-P noise. | Lacks Kelvin sensing - unsuitable for high-current precision sources; better for low-noise, low-drift standalone references. | Select when highest initial accuracy and lowest tempco are prioritized over load-induced error cancellation. |
| REF5030IDR | 3.0V output, ±0.05% initial accuracy, 3ppm/°C tempco, force/sense outputs, but 500μA supply current and 2.5μVP-P noise. | Higher quiescent current limits use in battery-powered devices; wider noise bandwidth impacts high-speed ADC SNR. | Select when force/sense capability is required and 500μA supply is acceptable - e.g., mains-powered test equipment. |
Compared with ADR4530BRZ and REF5030IDR, MAX6126BASA30+ uniquely balances B-grade cost efficiency (±0.06%), SO-8 force/sense functionality, and ultra-low 1.75μVP-P noise - making it optimal for automotive and industrial current-source designs where trace resistance compensation and low-frequency noise dominate error budgets.
Availability
MAX6126BASA30+ is available at Aetrix Electronics and suitable for high-resolution data acquisition, precision current sources, digital voltmeters, and automotive battery monitoring requiring stable component supply across extended temperature ranges.
Supply support for MAX6126BASA30+ 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 - with emphasis on reliability and automotive qualification.
The MAX6126 series targets ultra-precision voltage reference needs in measurement, control, and instrumentation systems where low noise, low tempco, and force/sense architecture are essential for sub-0.1% accuracy.
FAQ
What is the maximum operating temperature range for MAX6126BASA30+?
MAX6126BASA30+ is rated for continuous operation from −40°C to +125°C, with all electrical specifications guaranteed across this full automotive temperature range - including ±0.06% initial accuracy and 5ppm/°C max temperature coefficient.
Does MAX6126BASA30+ require an external resistor like shunt references?
No, MAX6126BASA30+ is a series-mode voltage reference and does not require an external current-setting resistor. Its 380μA quiescent supply current is virtually independent of input voltage, simplifying design versus two-terminal shunt alternatives.
How does the force/sense (OUTF/OUTS) configuration improve accuracy in MAX6126BASA30+?
The OUTF/OUTS pair enables Kelvin connection: OUTF delivers current to the load, while OUTS senses voltage at the load point. This cancels voltage drop across PCB traces or wiring - critical for maintaining ±0.06% accuracy in 10mA current sources with >50mΩ path resistance.
Can MAX6126BASA30+ drive a 10μF output capacitor?
Yes, MAX6126BASA30+ is stable with output capacitance from 0.1μF to 10μF. Using 10μF improves transient response for rapidly changing loads - such as multiplexed sensor arrays - while maintaining phase margin and avoiding oscillation.
What is the purpose of the NR pin on MAX6126BASA30+?
The NR (Noise Reduction) pin accepts a 0.1μF capacitor to reduce 1kHz wideband noise from 90nV/√Hz to 55nV/√Hz and suppress AC supply ripple. With NR bypassed, 0.1Hz–10Hz flicker noise drops to 0.9μVP-P, enhancing low-frequency measurement fidelity.
MAX6126BASA30+ 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):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.06%
- Temperature Coefficient:
- 10ppm/°C
- Noise - 0.1Hz to 10Hz:
- 1.75µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 3.2V ~ 12.6V
- Current - Supply:
- 725µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX6126BASA30+ FAQ
1.How can I place an order for MAX6126BASA30+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6126BASA30+ 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 MAX6126BASA30+ reliable?
The price and inventory of MAX6126BASA30+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6126BASA30+ is usually 5 days.
3.What payment methods are accepted for MAX6126BASA30+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6126BASA30+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6126BASA30+?
MAX6126BASA30+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6126BASA30+ 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 MAX6126BASA30+?
For technical support, including MAX6126BASA30+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6126BASA30+ requirements.
6.How does Aetrix verify that MAX6126BASA30+ is sourced from the original manufacturer or authorized distributors?
All MAX6126BASA30+ 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 MAX6126BASA30+ meets industry standards.
7.What is the process for return or replacement of MAX6126BASA30+?
All MAX6126BASA30+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6126BASA30+, 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 MAX6126BASA30+ part is unused and in its original packaging.
Return procedure for MAX6126BASA30+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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