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Analog Devices Inc./Maxim Integrated MAX6126AASA50+
- Part No.:
- MAX6126AASA50+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6126AASA50+.pdf
- Description:
- IC VREF SERIES 0.02% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,600
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Product details
Overview
MAX6126AASA50+ from Maxim Integrated is an ultra-high-precision, ultra-low-noise series voltage reference delivering 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 precision ADC/DAC biasing in automotive and industrial measurement systems.
For engineers reviewing the MAX6126AASA50+ datasheet, MAX6126AASA50+ pinout, MAX6126AASA50+ application, or MAX6126AASA50+ equivalent, key selection criteria include its force/sense output architecture for remote sensing, 0.1µF–10µF capacitive-load stability, 200mV (max) dropout at 10mA, 380µA quiescent current, and A-grade SO-8 packaging qualified for automotive temperature range.
Technical Context
The MAX6126AASA50+ 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 separates flicker and wideband noise paths, enabling 2.85µVP-P (0.1Hz–10Hz) and 145nV/√Hz (1kHz, no NR cap) performance without elevated supply current.
It implements a Kelvin-connected force/sense output structure: OUTF delivers load current while OUTS and GNDS provide high-accuracy voltage regulation feedback at the load point. Dropout is defined as VIN–VOUT where VOUT drops by 0.1% - specified at 50mV (typ) to 200mV (max) across 5–10mA sourcing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±0.02% (max) at +25°C - enables direct interface with 5V-rail SAR ADCs and DACs without scaling. |
| Temperature Coefficient | 3ppm/°C (max) from –40°C to +125°C - ensures ≤±0.6mV drift over full automotive range. |
| Noise (0.1Hz–10Hz) | 2.85µVP-P - supports 20-bit+ resolution in precision data acquisition without external filtering. |
| Dropout Voltage | 200mV (max) at 10mA load - allows operation with only 5.2V input, minimizing LDO overhead in 5V systems. |
| Supply Current | 380µA (typ) at +25°C, <725µA over –40°C to +125°C - enables low-power battery-backed reference designs. |
| Load Regulation | 50µV/mA (max) sourcing - maintains <±0.5mV error across full 10mA load swing. |
| Line Regulation | 40µV/V (max) - rejects supply ripple up to 12.6V with minimal output variation. |
Pinout & Package
MAX6126AASA50+ is housed in an 8-pin SO package (SOIC-8), RoHS-compliant and lead-free (+ suffix). 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 145nV/√Hz to 95nV/√Hz and 0.1Hz–10Hz noise to 0.6µVP-P. |
| IN (Pin 2) | Positive supply input | Operates from 5.2V to 12.6V; supply current varies <2µA/V - stable under varying rail conditions. |
| GND (Pin 3) | Power ground reference | Primary ground return for internal circuitry; separate from GNDS to isolate sense path. |
| GNDS (Pin 4) | Ground-sense connection | Connects to load ground point to cancel ground-return voltage drop in Kelvin configuration. |
| Pins 5 & 8 | Internally connected | No external connection required; floating or tied to GND has no functional impact. |
| OUTS (Pin 6) | Voltage reference sense output | Provides regulated voltage feedback to control loop; connects directly to load reference node. |
| OUTF (Pin 7) | Voltage reference force output | Delivers load current; shorted to OUTS near load to eliminate trace resistance error. |
Key Features
| Feature | Design Value |
|---|---|
| Force/sense output architecture | Enables remote sensing with <±10µV error from trace IR drop - critical for PCB-level metrology calibration. |
| Ultra-low 0.1Hz–10Hz noise | 2.85µVP-P (no NR cap); 0.6µVP-P with 100µF NR cap - eliminates need for post-regulator RC filtering in high-res digitizers. |
| Stable with 0.1µF–10µF load capacitance | Supports ceramic or tantalum bypassing without phase-margin risk - simplifies layout for fast-switching loads. |
| Low 200mV (max) dropout at 10mA | Permits direct use after 5.2V LDOs or buck converters - avoids cascaded regulation loss in power-constrained systems. |
| 20ppm/1000hr long-term stability (SO) | Ensures <±0.1mV drift over 6 months of continuous operation - meets 10-year calibration interval requirements. |
Applications
| High-Resolution Data Acquisition | Automotive Sensor Signal Conditioning |
|---|---|
|
Use Scenario: 24-bit delta-sigma ADC front-end in portable multimeter or bench DMM. IC Role / Device Role / Timing Role: Primary voltage reference for ADC VREF input, providing stable 5.000V reference with sub-ppm stability. Use Value: Enables true 24-bit ENOB by limiting reference-induced integral nonlinearity to <1 LSB over temperature and time. |
Use Scenario: Precision current source for RTD or strain-gauge bridge excitation in ADAS ECU. IC Role / Device Role / Timing Role: Force/sense reference driving constant-current mirror with remote Kelvin sensing at sensor node. Use Value: Eliminates 5–10mΩ PCB trace resistance error, maintaining <0.1% current accuracy despite board thermal gradients. |
| Digital Voltmeter Reference Standard | Industrial Process Controller Calibration |
|
Use Scenario: Bench-grade digital voltmeter requiring NIST-traceable 5V reference with <10ppm/year drift. IC Role / Device Role / Timing Role: Primary reference standard in self-calibrating DVM architecture, monitored against internal DAC. Use Value: 20ppm/1000hr long-term stability and 3ppm/°C tempco meet ANSI C12.20 Class 0.1 accuracy requirements. |
Use Scenario: Analog output module (4–20mA) in PLC rack requiring stable reference for current-loop DAC. IC Role / Device Role / Timing Role: Reference for precision 16-bit DAC generating loop-control voltage, operating continuously at +85°C. Use Value: Maintains <±0.02% output accuracy over 10-year field life, even with repeated thermal cycling between –40°C and +85°C. |
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 (0.1Hz–10Hz) noise and no force/sense outputs. | Lacks Kelvin sensing - unsuitable for remote-load applications with >10mΩ trace resistance. | Select when noise is secondary to cost and force/sense functionality is unnecessary. |
| REF5050AIDR | 5.0V output, ±0.05% initial accuracy, 3ppm/°C max tempco, 3.2µVP-P noise, and force/sense capability, but 1.2mA quiescent current. | Higher supply current limits use in battery-powered or thermally constrained modules. | Select when long-term stability (<15ppm/1000hr) is prioritized over power efficiency. |
Compared with ADR4550BRZ and REF5050AIDR, MAX6126AASA50+ uniquely combines A-grade 5V precision, ultra-low flicker noise, force/sense architecture, and sub-400µA quiescent current - making it optimal for automotive and portable high-resolution measurement systems where power, accuracy, and layout robustness are jointly constrained.
Availability
MAX6126AASA50+ is available at Aetrix Electronics and suitable for high-resolution A/D converters, automotive sensor signal conditioning, and digital voltmeter reference standards requiring stable component supply across extended temperature and long-life deployments.
Supply support for MAX6126AASA50+ 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 demanding industrial, automotive, and communications applications.
The MAX6126 family delivers ultra-high-precision, ultra-low-noise series voltage references optimized for metrology-grade data acquisition, calibration equipment, and safety-critical sensor interfaces.
FAQ
What is the maximum allowable input voltage for MAX6126AASA50+?
The absolute maximum input voltage for MAX6126AASA50+ is +13V, but the guaranteed operational range is 5.2V to 12.6V. Operation above 12.6V may cause parametric degradation or damage. The device's line regulation is characterized from 5.2V to 12.6V, with typical PSRR exceeding –60dB up to 10kHz.
Does MAX6126AASA50+ require an external noise-reduction capacitor?
No, MAX6126AASA50+ operates stably without an external noise-reduction (NR) capacitor. However, adding a 0.1µF capacitor to the NR pin reduces wideband noise from 145nV/√Hz to 95nV/√Hz and 0.1Hz–10Hz noise from 2.85µVP-P to 0.9µVP-P. A 100µF NR capacitor further lowers flicker noise to 0.6µVP-P.
How does the force/sense architecture of MAX6126AASA50+ improve accuracy?
MAX6126AASA50+ uses separate OUTF (force) and OUTS/GNDS (sense) terminals to implement a Kelvin connection. By routing OUTF to the load and returning OUTS/GNDS directly to the load's reference point, voltage drops across PCB traces and connectors are excluded from regulation - maintaining output accuracy despite trace resistances up to 100mΩ.
Can MAX6126AASA50+ drive a 10µF output capacitor?
Yes, MAX6126AASA50+ is stable with output capacitance from 0.1µF to 10µF, including ceramic, tantalum, and electrolytic types. A 10µF capacitor improves transient response for rapidly changing loads, though turn-on settling time increases to 20ms when combined with a 0.1µF NR capacitor.
What is the thermal hysteresis specification for MAX6126AASA50+ in SO package?
The thermal hysteresis for MAX6126AASA50+ in SO package is 15ppm - defined as the change in output voltage at +25°C before and after cycling from –40°C to +125°C. This low hysteresis ensures repeatable calibration points across thermal cycles in field-deployed instrumentation.
MAX6126AASA50+ 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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.02%
- 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-SOIC
MAX6126AASA50+ FAQ
1.How can I place an order for MAX6126AASA50+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6126AASA50+ 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 MAX6126AASA50+ reliable?
The price and inventory of MAX6126AASA50+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6126AASA50+ is usually 5 days.
3.What payment methods are accepted for MAX6126AASA50+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6126AASA50+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6126AASA50+?
MAX6126AASA50+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6126AASA50+ 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 MAX6126AASA50+?
For technical support, including MAX6126AASA50+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6126AASA50+ requirements.
6.How does Aetrix verify that MAX6126AASA50+ is sourced from the original manufacturer or authorized distributors?
All MAX6126AASA50+ 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 MAX6126AASA50+ meets industry standards.
7.What is the process for return or replacement of MAX6126AASA50+?
All MAX6126AASA50+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6126AASA50+, 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 MAX6126AASA50+ part is unused and in its original packaging.
Return procedure for MAX6126AASA50+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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