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Analog Devices Inc./Maxim Integrated MAX6226ALA25+T
- Part No.:
- MAX6226ALA25+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-CLCC
- Datasheet:
-
MAX6226ALA25+T.pdf
- Description:
- IC VREF SERIES 0.02% 8LCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,353
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Product details
Overview
MAX6226ALA25+T from Analog Devices is an ultra-high-precision, ultra-low-noise series voltage reference delivering 2.500V output with ±0.02% 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+T datasheet, MAX6226ALA25+T pinout, MAX6226ALA25+T application, or MAX6226ALA25+T equivalent, this page provides verified technical context, real-world design meaning of key specs, force/sense output implementation guidance, automotive-grade (-40°C to +125°C) stability data, and validated alternative options for precision reference selection.
Technical Context
The MAX6226ALA25+T employs curvature-corrected bandgap architecture with laser-trimmed thin-film resistors to achieve 3ppm/°C max TCVOUT and 11ppm/1000hr long-term drift. Its dual-output force-and-sense topology (OUTF/OUTS) enables Kelvin sensing to cancel trace resistance errors in precision current source and remote-load applications.
It integrates a dedicated noise reduction (NR) pin enabling 45nV/√Hz wideband noise (vs. 75nV/√Hz without NR cap) using a 0.1μF capacitor, while maintaining only 380μA quiescent current - independent of input voltage across its 2.7V–12.6V range. Dropout is as low as 60mV at 5mA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±0.02% at +25°C - ensures ≤0.5mV absolute error for 16-bit DAC reference at 2.5V full-scale. |
| Temp Coefficient | ≤3ppm/°C (−40°C to +125°C) - limits drift to ≤0.93mV over full automotive range, critical for <1-LSB error in 16-bit systems. |
| Flicker Noise | 1.45μVP-P (0.1Hz–10Hz) - enables sub-μV RMS noise floor in precision weigh-scale and sensor front-end designs. |
| Wideband Noise | 45nV/√Hz @1kHz with 0.1μF NR cap - reduces quantization noise contribution in 20-bit SAR ADC reference paths. |
| Load Regulation | ≤0.05Ω sourcing / ≤0.25Ω sinking - maintains <50μV shift at 10mA load change, essential for programmable current source accuracy. |
| Dropout Voltage | 60mV (typ) at 5mA - allows operation from 2.56V supply, enabling single-cell LiFePO₄ or low-voltage industrial rails. |
| Long-Term Drift | 11ppm/1000hr - predicts <33ppm (83μV) drift over 3 years, supporting 10-year calibration intervals in metrology instruments. |
Pinout & Package
MAX6226ALA25+T is housed in an 8-pin hermetically sealed ceramic LCC (leadless chip carrier) package (outline 21-100289), RoHS-compliant, with gold-plated terminations and thermal resistance θJA = 56.19°C/W on four-layer board. The package eliminates humidity-induced drift and improves long-term stability vs. plastic alternatives.
| 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; floating if unused. |
| 2 - IN | Positive Supply Input | Accepts 2.7V–12.6V; supplies internal regulator; requires local 0.1μF bypass to GND for PSRR enhancement. |
| 4 - GND | Analog Ground Reference | Low-impedance return path for OUTF, OUTS, and NR; must be star-connected to minimize ground bounce. |
| 5 - OUTS | Sense Output (High-Z) | Feedback node for regulation loop; connects directly to load point to cancel PCB trace IR drop in Kelvin configuration. |
| 6 - OUTF | Force Output (Power) | Delivers up to 10mA load current; tied to OUTS near load; bypassed with 0.1–10μF cap to GND for stability. |
| 3, 7, 8 - I.C. | Internally Connected | No external connection permitted; pins 3/7/8 are die bond pads - copper or solder mask under pin 8 must be removed. |
Key Features
| Feature | Design Value |
|---|---|
| Force-and-Sense Outputs | Enables true Kelvin connection: OUTF powers load, OUTS senses voltage at load node - eliminates up to 50mΩ trace resistance error. |
| Ultra-Low Flicker Noise | 1.45μVP-P (0.1Hz–10Hz) - preserves DC accuracy in high-gain instrumentation amplifiers and digital multimeters. |
| Curvature-Corrected Bandgap | 3ppm/°C max TCVOUT over −40°C to +125°C - meets AEC-Q100 Grade 0 requirements for automotive sensor modules. |
| Stable with Wide Capacitive Load | 0.1μF to 10μF output capacitance - accommodates ceramic + tantalum parallel filtering for transient-heavy industrial PLC analog inputs. |
| Low Quiescent Current | 380μA typical, <2μA/V supply variation - enables battery-backed precision reference in portable test equipment with >1-year runtime. |
Applications
| High-Resolution Data Acquisition | Precision Current Source |
|---|---|
|
Use Scenario: 16-bit SAR ADC in industrial process controller measuring 4–20mA loop sensors. IC Role / Device Role / Timing Role: Primary voltage reference for ADC VREF input; force/sense outputs compensate for PCB trace resistance between reference and ADC. Use Value: Maintains <0.93mV (3ppm/°C × 2.5V × 165°C) total drift over operating range, ensuring <1 LSB error across full temperature span. |
Use Scenario: Programmable 100μA–10mA precision current source for RTD excitation in temperature transmitters. IC Role / Device Role / Timing Role: Sets reference voltage for op-amp-controlled current mirror; OUTF delivers current, OUTS senses at RTD node. Use Value: Load regulation ≤0.05Ω ensures <0.5mV error at 10mA, translating to <0.005% current accuracy independent of trace length. |
| Automotive Sensor Calibration | ATE Reference Standard |
|
Use Scenario: On-board calibration reference for MEMS pressure sensor in ADAS ECU, operating from 3.3V rail. IC Role / Device Role / Timing Role: Stable 2.5V reference for ratiometric ADC measuring bridge output; NR pin decouples switching noise from buck converter. Use Value: 11ppm/1000hr long-term drift supports 5-year field calibration interval without recalibration; ceramic LCC prevents humidity-induced drift. |
Use Scenario: Main reference in automated test equipment verifying 20-bit DAC linearity and gain accuracy. IC Role / Device Role / Timing Role: Low-noise, low-drift reference driving DAC reference input; 45nV/√Hz noise avoids masking DAC intrinsic noise floor. Use Value: 1.45μVP-P flicker noise enables <0.0001% RMS noise contribution - critical for measuring DAC differential nonlinearity below 0.25 LSB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR4525BRZ | 2.5V output, ±0.02% initial accuracy, 3ppm/°C TCVOUT, but higher 2.25μVP-P flicker noise and no NR pin. | Lacks force/sense outputs - unsuitable for remote-sensing current sources; requires external Kelvin routing. | Select when ultra-low flicker noise is secondary to cost and footprint; not recommended for <1μV noise-critical designs. |
| REF5025IDR | 2.5V output, ±0.05% initial accuracy, 3ppm/°C TCVOUT, 1.6μVP-P noise, no NR pin, 10mA sourcing capability. | Higher initial error (±125μV vs. ±500μV) and no noise-reduction option - limits resolution in 18-bit+ systems. | Choose for TI ecosystem compatibility and lower cost; verify system-level drift budget tolerates wider initial tolerance. |
Compared with ADR4525BRZ and REF5025IDR, MAX6226ALA25+T uniquely combines 1.45μVP-P flicker noise, force/sense outputs, and NR-capable wideband noise reduction - making it the only option among the three qualified for sub-μV noise, remote-load, and automotive-grade long-term stability requirements.
Availability
MAX6226ALA25+T is available at Aetrix Electronics and suitable for high-resolution data acquisition, precision current sourcing, automotive sensor calibration, and ATE reference standard applications requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for MAX6226ALA25+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
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 since 1965.
The MAX6226 series belongs to Analog Devices' ultra-precision voltage reference product line, engineered specifically for metrology-grade stability, ultra-low noise, and automotive temperature resilience - targeting applications where 1-LSB accuracy must be maintained over time, temperature, and layout variations.
FAQ
What is the maximum load current supported by the MAX6226ALA25+T?
The MAX6226ALA25+T supports ±10mA load current - sourcing up to +10mA from OUTF and sinking up to −10mA into OUTF. Load regulation is guaranteed ≤0.05Ω for sourcing and ≤0.25Ω for sinking, ensuring minimal output voltage shift under dynamic load conditions. This capability makes MAX6226ALA25+T suitable for driving moderate-current precision circuits like op-amp bias networks and current-source transistors without external buffers.
How does the force-and-sense architecture of the MAX6226ALA25+T improve accuracy?
The MAX6226ALA25+T uses separate OUTF (force) and OUTS (sense) pins to implement a Kelvin connection: OUTF delivers current to the load, while OUTS feeds back the voltage *at the load point*. This cancels voltage drop across PCB traces or wiring between the IC and load. For example, with 50mΩ trace resistance and 10mA load, conventional references incur 500μV error - eliminated by MAX6226ALA25+T's sense-loop topology, preserving full ±0.02% initial accuracy at the point of use.
Can the MAX6226ALA25+T operate from a 3.3V supply?
Yes - the MAX6226ALA25+T operates from 2.7V to 12.6V, so a 3.3V supply is fully supported. At 3.3V input, dropout is 60–200mV (depending on load), leaving ≥3.1V at OUTF - sufficient for stable 2.5V output. Quiescent current remains ~380μA, and noise performance is preserved. This enables direct use with common 3.3V system rails in industrial controllers and portable instrumentation without additional regulators.
What is the purpose of the NR pin on the MAX6226ALA25+T?
The NR (Noise Reduction) pin on MAX6226ALA25+T accepts an external 0.1μF capacitor to reduce wideband noise from 75nV/√Hz to 45nV/√Hz at 1kHz. It does not affect flicker noise (1.45μVP-P). The capacitor forms a low-pass filter on an internal noise-shaping node. Leaving NR unconnected retains baseline noise performance; adding the capacitor is optional but recommended for high-resolution ADC/DAC reference applications where wideband noise dominates total integrated noise.
Is the MAX6226ALA25+T qualified for automotive applications?
Yes - the MAX6226ALA25+T 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 drift, and 5ppm thermal hysteresis meet AEC-Q100 stress-test requirements for Grade 0 (−40°C to +150°C junction). It is widely deployed in automotive sensor modules, battery management systems, and ADAS ECUs requiring metrology-grade reference stability.
MAX6226ALA25+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-CLCC
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX6226ALA25+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6226ALA25+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 MAX6226ALA25+T reliable?
The price and inventory of MAX6226ALA25+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6226ALA25+T is usually 5 days.
3.What payment methods are accepted for MAX6226ALA25+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6226ALA25+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6226ALA25+T?
MAX6226ALA25+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6226ALA25+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 MAX6226ALA25+T?
For technical support, including MAX6226ALA25+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6226ALA25+T requirements.
6.How does Aetrix verify that MAX6226ALA25+T is sourced from the original manufacturer or authorized distributors?
All MAX6226ALA25+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 MAX6226ALA25+T meets industry standards.
7.What is the process for return or replacement of MAX6226ALA25+T?
All MAX6226ALA25+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6226ALA25+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 MAX6226ALA25+T part is unused and in its original packaging.
Return procedure for MAX6226ALA25+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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