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Analog Devices Inc./Maxim Integrated MAX6126B30+T
- Part No.:
- MAX6126B30+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6126B30+T.pdf
- Description:
- IC VREF SERIES 0.1% 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,900
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Product details
Overview
MAX6126B30+T from Maxim Integrated is a B-grade, 3.000V ultra-low-noise, high-precision series voltage reference with ±0.06% initial accuracy, 3ppm/°C (max) temperature coefficient over -40°C to +85°C, and 1.75µVP-P (0.1Hz–10Hz) flicker noise - designed for precision ADC/DAC biasing in automotive and industrial systems operating from -40°C to +125°C.
For engineers reviewing the MAX6126B30+T datasheet, MAX6126B30+T pinout, MAX6126B30+T application, or MAX6126B30+T equivalent, key selection criteria include its force/sense output architecture, 0.1µF–10µF capacitive-load stability, 200mV dropout at 5mA, 380µA quiescent current, and SO-8 package compatibility with remote-sensing PCB layouts.
Technical Context
The MAX6126B30+T implements a curvature-corrected bandgap core with laser-trimmed thin-film resistors to achieve 3ppm/°C max tempco and ±0.06% initial accuracy. Its dual-output (OUTF/OUTS) architecture enables Kelvin sensing to cancel trace resistance errors in precision current sources and high-resolution data converters.
It features an NR pin supporting 0.1µF capacitor integration to reduce wideband noise from 90nV/√Hz to 55nV/√Hz at 1kHz and suppress AC power-supply ripple - while maintaining stable operation across 3.2V–12.6V input range and ±10mA load current capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.000V ±0.06% at +25°C - sets precise full-scale reference for 16-bit+ SAR and delta-sigma ADCs without calibration. |
| Tempco (–40°C to +85°C) | 3ppm/°C max - ensures ≤0.9mV drift over industrial temperature range, critical for uncalibrated field instrumentation. |
| Flicker Noise (0.1Hz–10Hz) | 1.75µVP-P - enables <18-bit effective resolution in low-frequency precision measurements. |
| Dropout Voltage (5mA) | 0.2V max - allows operation from 3.2V supply with 3.0V output, supporting low-voltage battery-powered systems. |
| Load Regulation | 30µV/mA max sourcing - maintains <0.001% output shift under 10mA dynamic load changes in active filter references. |
| Quiescent Current | 380µA typical - enables always-on precision references in energy-constrained IoT sensor nodes. |
| Capacitive Load Range | 0.1µF to 10µF - supports robust decoupling with ceramic or tantalum output caps without oscillation risk. |
Pinout & Package
MAX6126B30+T is housed in an 8-pin SO (Small Outline) package with exposed pad for thermal performance in automotive and industrial environments.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NR (Noise Reduction) | Accepts 0.1µF capacitor to reduce 1kHz wideband noise by 40% and improve PSRR; left floating if unused. |
| 2 | IN | Positive supply input (3.2V–12.6V); supplies internal regulator and reference core with <2µA/V line regulation sensitivity. |
| 3 | GND | Main power ground return; separate from GNDS to isolate noisy digital return paths from precision sensing. |
| 4 | GNDS | Ground sense terminal - connects to load ground point to eliminate IR drop error in Kelvin configurations. |
| 5, 8 | I.C. | Internally connected; no external connection permitted - floating or tied to GND causes undefined behavior. |
| 6 | OUTS | Voltage sense output - feeds feedback path to regulate OUTF; used with GNDS for 4-wire remote sensing. |
| 7 | OUTF | Force output - delivers regulated 3.000V to load; must be shorted to OUTS near load for optimal accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| Force/Sense Output Architecture | Enables true 4-wire Kelvin referencing to eliminate up to 50mΩ of PCB trace resistance error in precision current sources. |
| Ultra-Low Flicker Noise | 1.75µVP-P (0.1Hz–10Hz) supports sub-20-bit ENOB in DC-coupled instrumentation amplifiers and weigh-scale front-ends. |
| Wide Input Range & Low Dropout | Operates from 3.2V to 12.6V with only 200mV headroom - ideal for single-supply systems using 3.3V or 5V rails. |
| Stable with Standard Ceramic Caps | Guaranteed stability with 0.1µF–10µF X7R/C0G MLCCs eliminates need for specialized low-ESR tantalum or polymer capacitors. |
| Automotive Temperature Range | Specified from –40°C to +125°C with 20ppm/1000hr long-term stability - qualified for under-hood and ADAS sensor modules. |
Applications
| High-Resolution A/D Converters | Precision Current Sources |
|---|---|
|
Use Scenario: 18-bit SAR ADC in portable multimeter requiring stable 3.000V reference for ±0.01% absolute accuracy. IC Role / Device Role / Timing Role: Primary voltage reference supplying OUTF to ADC REF+ pin; OUTS/GNDS enable remote sensing at ADC input filter node. Use Value: 3ppm/°C tempco and 1.75µVP-P noise ensure <0.005% total unadjusted error across –10°C to +50°C handheld operating range. |
Use Scenario: 4–20mA loop transmitter with 0.1% full-scale accuracy requirement in process control transmitters. IC Role / Device Role / Timing Role: Reference source for op-amp-based Howland current source; OUTF drives MOSFET gate, OUTS senses shunt voltage. Use Value: Force/sense architecture cancels 100mΩ PCB trace resistance, eliminating 0.33% gain error at 20mA - meeting IEC 61000-4-4 immunity specs. |
| Digital Voltmeters | Industrial Process Control |
|
Use Scenario: Benchtop DVM with auto-ranging and 6½-digit display needing low-drift reference for 10ppm measurement repeatability. IC Role / Device Role / Timing Role: Master reference for dual-slope integrator and internal DAC calibration; NR pin bypassed with 0.1µF to suppress switching noise. Use Value: 20ppm/1000hr long-term stability reduces annual recalibration frequency by 60% versus standard bandgap references. |
Use Scenario: PLC analog input module measuring thermocouple signals with cold-junction compensation requiring stable 3.000V bias. IC Role / Device Role / Timing Role: Precision excitation source for RTD bridges and reference for sigma-delta ADC front-end; SO-8 package supports conformal coating. Use Value: Guaranteed operation at +125°C ambient enables direct mounting on dense I/O carrier boards without derating or heatsinking. |
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, 3ppm/°C max tempco, but higher 3.8µA quiescent current and no NR pin. | Lacks noise-reduction capacitor support and force/sense outputs - unsuitable for Kelvin-sensed current sources. | Select when ultra-high initial accuracy outweighs low-noise and remote-sensing requirements. |
| REF5030IDR | 3.0V output, ±0.05% initial accuracy, 3ppm/°C max tempco, 0.1µF–10µF load stability, but requires minimum 3.3V supply. | No NR pin or dedicated GNDS; uses single-output architecture - limits PCB layout flexibility for high-accuracy sensing. | Choose for cost-sensitive industrial designs where 3.3V minimum supply is acceptable and Kelvin routing is not required. |
Compared with ADR4530BRZ and REF5030IDR, MAX6126B30+T uniquely combines B-grade precision (±0.06%), ultra-low flicker noise (1.75µVP-P), and integrated force/sense outputs - enabling <0.01% system-level accuracy in remote-sensed current sources and high-resolution data acquisition without external compensation circuitry.
Availability
MAX6126B30+T is available at Aetrix Electronics and suitable for high-resolution A/D converters, precision current sources, digital voltmeters, and industrial process control systems requiring stable component supply across automotive (-40°C to +125°C) and extended industrial temperature ranges.
Supply support for MAX6126B30+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 automotive, industrial, and communications markets.
The MAX6126 family delivers ultra-low-noise, high-accuracy series voltage references optimized for metrology-grade data conversion and closed-loop current regulation - emphasizing thermal stability, load transient immunity, and layout-friendly force/sense topology.
FAQ
What is the maximum allowable supply voltage for MAX6126B30+T?
The MAX6126B30+T supports an absolute maximum supply voltage of +13V on the IN pin, but its guaranteed operational range is 3.2V to 12.6V. Operation above 12.6V voids parametric guarantees and risks permanent damage per Absolute Maximum Ratings. For reliable 3.000V output regulation, maintain VIN ≥ (VOUT + dropout) = 3.2V minimum.
Does MAX6126B30+T require an external resistor like shunt references?
No, MAX6126B30+T is a series-mode voltage reference and does not require an external current-setting resistor. Its 380µA quiescent current is internally regulated and virtually independent of supply voltage - unlike two-terminal shunt references that waste current through external resistors and exhibit supply-dependent accuracy.
Can MAX6126B30+T drive a 10µF output capacitor without instability?
Yes, MAX6126B30+T is explicitly characterized and guaranteed stable with output capacitance from 0.1µF to 10µF, including standard X7R ceramic capacitors. This eliminates need for external compensation and supports robust decoupling in noisy industrial environments where large bulk capacitance is required.
How does the NR pin affect noise performance of MAX6126B30+T?
Connecting a 0.1µF capacitor to the NR pin of MAX6126B30+T reduces 1kHz wideband noise from 90nV/√Hz to 55nV/√Hz and lowers 0.1Hz–10Hz flicker noise to 0.9µVP-P. This improvement directly enhances effective resolution in precision digitizers and mitigates switching noise coupling from adjacent DC/DC converters.
What is the purpose of separate OUTF and OUTS pins on MAX6126B30+T?
The OUTF (force) and OUTS (sense) pins implement a Kelvin connection: OUTF delivers current to the load, while OUTS provides feedback to the internal regulator. Shorting them at the load eliminates voltage drop errors in PCB traces or connectors - enabling <0.001% accuracy in precision current sources and high-gain instrumentation amplifier references.
MAX6126B30+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 12ppm/°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-uMAX/uSOP
MAX6126B30+T FAQ
1.How can I place an order for MAX6126B30+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6126B30+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 MAX6126B30+T reliable?
The price and inventory of MAX6126B30+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6126B30+T is usually 5 days.
3.What payment methods are accepted for MAX6126B30+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6126B30+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6126B30+T?
MAX6126B30+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6126B30+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 MAX6126B30+T?
For technical support, including MAX6126B30+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6126B30+T requirements.
6.How does Aetrix verify that MAX6126B30+T is sourced from the original manufacturer or authorized distributors?
All MAX6126B30+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 MAX6126B30+T meets industry standards.
7.What is the process for return or replacement of MAX6126B30+T?
All MAX6126B30+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6126B30+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 MAX6126B30+T part is unused and in its original packaging.
Return procedure for MAX6126B30+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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