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Analog Devices Inc./Maxim Integrated MAX6226ALA25+
- Part No.:
- MAX6226ALA25+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-CLCC
- Datasheet:
-
MAX6226ALA25+.pdf
- Description:
- IC VREF SERIES 0.02% 8LCC
- Quantity:
- Payment:
- Shipping:
Inventory:675
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Product details
Overview
MAX6226ALA25+ from Analog Devices is an ultra-high-precision, ultra-low-noise, low-dropout series voltage reference delivering 2.500V output with ±0.02% (max) initial accuracy, 3ppm/°C (max) temperature coefficient, and 1.45μVP-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, precision current sources, and ATE equipment requiring stable, low-drift references.
For engineers reviewing the MAX6226ALA25+ datasheet, MAX6226ALA25+ pinout, MAX6226ALA25+ application, or MAX6226ALA25+ equivalent, this page delivers verified technical context, exact pin functions, real-world stability metrics (11ppm/1000hr long-term drift), force/sense architecture implications, and automotive-grade (-40°C to +125°C) performance boundaries - all specific to the MAX6226ALA25+ variant.
Technical Context
The MAX6226ALA25+ implements a curvature-corrected, laser-trimmed thin-film resistor architecture enabling 3ppm/°C max TCVOUT over -40°C to +125°C and ±0.02% max initial accuracy at +25°C. Its proprietary low-noise core achieves 1.45μVP-P (0.1Hz–10Hz) and 75nV/√Hz (1kHz, no NR cap), reducible to 45nV/√Hz with a 0.1μF capacitor on the NR pin.
It uses a Kelvin-connected force-and-sense output topology (OUTF/OUTS) to eliminate line-drop error in remote sensing applications, with guaranteed load regulation of ≤0.05Ω (source) and ≤0.25Ω (sink). Dropout voltage is as low as 60mV (typ) at 5mA load, and it remains stable with 0.1μF–10μF capacitive loads without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±0.02% (max) at +25°C - enables 16-bit DAC reference accuracy over full automotive temp range |
| Temp Coefficient | ≤3ppm/°C (max, -40°C to +125°C) - ensures <1 LSB drift in 16-bit systems across full operating range |
| Noise (0.1–10Hz) | 1.45μVP-P - critical for high-resolution weigh-scale and sensor front-end applications |
| Dropout Voltage | 60mV (typ) at 5mA - allows operation with VIN as low as 2.56V while maintaining regulation |
| Quiescent Current | 380μA (typ) - stable across 2.7V–12.6V supply, enabling low-power precision systems |
| Load Regulation | ≤0.05Ω (source), ≤0.25Ω (sink) - maintains output stability under ±10mA dynamic loading |
| Long-Term Drift | 11ppm/1000hr - supports calibration-interval planning in metrology and test equipment |
Pinout & Package
MAX6226ALA25+ is housed in an 8-pin hermetically sealed ceramic LCC package (package code L8+2, outline 21-100289), offering superior humidity immunity, reduced mechanical stress, and improved long-term stability vs. plastic packages.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - NR | Noise Reduction input | Accepts 0.1μF capacitor to reduce wideband noise from 75nV/√Hz to 45nV/√Hz; left open if unused |
| 2 - IN | Positive power-supply input | Accepts 2.7V–12.6V supply; must deliver up to 300μA extra current during turn-on below dropout |
| 4 - GND | Analog ground reference | Return path for reference output and internal circuitry; requires low-impedance PCB connection |
| 5 - OUTS | Sense output (high-impedance) | Provides feedback to internal regulator; connects directly to load point for remote sensing accuracy |
| 6 - OUTF | Force output (low-impedance) | Delivers regulated current to load; shorted to OUTS near load to enable Kelvin sensing |
| 3, 7, 8 - I.C. | Internally connected | No external connection permitted; land pattern must avoid copper/solder mask under pin 8 |
Key Features
| Feature | Design Value |
|---|---|
| Force-and-sense outputs | Enables true Kelvin connection to cancel trace resistance error in precision current sources and remote ADC references |
| Ultra-low flicker noise | 1.45μVP-P (0.1Hz–10Hz) - minimizes low-frequency error in DC-coupled instrumentation amplifiers |
| Curvature-corrected TC | 3ppm/°C max over -40°C to +125°C - eliminates need for external compensation in automotive sensor modules |
| Laser-trimmed thin-film resistors | Ensures ±0.02% initial accuracy and 11ppm/1000hr long-term stability - reduces factory calibration burden |
| Stable with 0.1–10μF load capacitance | Eliminates need for external compensation networks - simplifies layout in space-constrained ATE fixtures |
Applications
| High-Resolution Data Converters | Precision Current Sources |
|---|---|
|
Use Scenario: Providing reference voltage for 16-bit SAR ADCs in industrial process controllers where 1 LSB = 38μV at 2.5V full scale. IC Role / Device Role / Timing Role: Voltage reference source with force/sense outputs ensuring <1 LSB total error over -40°C to +85°C. Use Value: Enables direct interface to MAX11200-family ADCs without gain/offset trimming, reducing BOM count and calibration time. |
Use Scenario: Generating stable 10mA current for RTD excitation in Class A temperature transmitters. IC Role / Device Role / Timing Role: Precision voltage source driving bipolar transistor base via OUTF, with OUTS sensing across sense resistor. Use Value: Achieves 0.01% current accuracy over temperature by eliminating PCB trace IR drop via Kelvin connection. |
| Automotive Sensor Calibration | ATE Reference Standards |
|
Use Scenario: Biasing MEMS pressure sensor signal chains in engine control units requiring long-term stability over 15-year vehicle life. IC Role / Device Role / Timing Role: Primary reference in closed-loop calibration circuit, leveraging 11ppm/1000hr drift spec and -40°C to +125°C rating. Use Value: Reduces annual recalibration frequency by 3× vs. standard bandgap references, lowering service cost. |
Use Scenario: Serving as master reference in automated test equipment for calibrating multimeters and source-measure units. IC Role / Device Role / Timing Role: Low-noise, low-drift reference with force/sense architecture enabling <0.1ppm measurement uncertainty. Use Value: Supports ISO/IEC 17025-compliant calibration labs by meeting 7½-digit DMM reference requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR4525BRZ | 2.5V output, ±0.02% initial accuracy, 3ppm/°C TC, but higher 2.2μVP-P noise (0.1–10Hz); SOIC-8 package | Lacks force/sense outputs - unsuitable for remote sensing; requires external Kelvin routing for same accuracy | Choose ADR4525BRZ only when board space permits SOIC-8 and remote sensing is not required. |
| REF5025IDR | 2.5V output, ±0.05% initial accuracy, 3ppm/°C TC, 1.6μVP-P noise; wider 2.7V–18V supply range; SOIC-8 | Higher initial error limits use in 16-bit systems; no NR pin - fixed 90nV/√Hz wideband noise | Select REF5025IDR only for cost-sensitive 14-bit applications where 0.05% accuracy suffices and noise is secondary. |
Compared with ADR4525BRZ and REF5025IDR, MAX6226ALA25+ uniquely combines force/sense architecture, 1.45μVP-P flicker noise, and hermetic ceramic packaging - making it the only option qualified for automotive-grade remote-sensing precision current sources and metrology-grade ATE references.
Availability
MAX6226ALA25+ is available at Aetrix Electronics and suitable for high-resolution data converters, precision current sources, automotive sensor calibration, and ATE reference standards requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for MAX6226ALA25+ 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and automotive markets.
The MAX6226 series was designed specifically for ultra-high-precision, ultra-low-noise voltage reference applications demanding sub-ppm stability, Kelvin sensing, and automotive-grade reliability - targeting metrology, ATE, and safety-critical sensor systems.
FAQ
What is the maximum supply voltage for MAX6226ALA25+?
The absolute maximum supply voltage for MAX6226ALA25+ is +13V, but the guaranteed operational range is 2.7V to 12.6V. Operation above 12.6V risks violating line regulation specs and may degrade long-term stability. The device draws only 380μA quiescent current across this full range, making it suitable for battery-backed precision systems where supply headroom is constrained.
Does MAX6226ALA25+ require an external resistor like shunt references?
No, MAX6226ALA25+ is a series-mode voltage reference and does not require an external current-setting resistor. Unlike two-terminal shunt references, its supply current is virtually independent of input voltage (variation ≤2μA/V), and it regulates output without dissipating excess supply current - simplifying design and improving efficiency in low-power applications.
How does the force-and-sense architecture of MAX6226ALA25+ improve accuracy?
The MAX6226ALA25+ uses separate OUTF (force) and OUTS (sense) pins to implement a Kelvin connection: OUTF delivers current to the load, while OUTS feeds back the actual voltage at the load point. This cancels voltage drop across PCB traces or wiring, enabling sub-0.01% accuracy in precision current sources and remote ADC references - a capability absent in single-output references like REF5025IDR.
What is the turn-on settling time for MAX6226ALA25+ with and without the NR capacitor?
Without the NR capacitor, MAX6226ALA25+ settles to within 0.01% of final value in 1ms (typ). With a 0.1μF capacitor on the NR pin, settling extends to 20ms due to added filtering - a trade-off between wideband noise reduction (45nV/√Hz) and startup speed. This behavior is explicitly characterized in the datasheet's "Turn-On Settling Time" table for the MAX6226ALA25+ variant.
Is MAX6226ALA25+ qualified for automotive applications?
Yes, MAX6226ALA25+ is specified for the automotive temperature range of -40°C to +125°C and packaged in a hermetic ceramic LCC that eliminates humidity-induced drift. Its 3ppm/°C max TCVOUT, 11ppm/1000hr long-term stability, and thermal hysteresis of 5ppm meet AEC-Q200 stress-test expectations for precision sensor biasing and ECU calibration modules.
MAX6226ALA25+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-CLCC
- Series:
- -
- Packaging:
- Tray
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.02%
- Temperature Coefficient:
- 5ppm/°C
- Noise - 0.1Hz to 10Hz:
- 1.45µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 2.7V ~ 12.6V
- Current - Supply:
- 550µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-CLCC (3.8x3.8)
MAX6226ALA25+ FAQ
1.How can I place an order for MAX6226ALA25+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6226ALA25+ 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 MAX6226ALA25+ reliable?
The price and inventory of MAX6226ALA25+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6226ALA25+ is usually 5 days.
3.What payment methods are accepted for MAX6226ALA25+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6226ALA25+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6226ALA25+?
MAX6226ALA25+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6226ALA25+ 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 MAX6226ALA25+?
For technical support, including MAX6226ALA25+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6226ALA25+ requirements.
6.How does Aetrix verify that MAX6226ALA25+ is sourced from the original manufacturer or authorized distributors?
All MAX6226ALA25+ 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 MAX6226ALA25+ meets industry standards.
7.What is the process for return or replacement of MAX6226ALA25+?
All MAX6226ALA25+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6226ALA25+, 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 MAX6226ALA25+ part is unused and in its original packaging.
Return procedure for MAX6226ALA25+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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