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Analog Devices Inc./Maxim Integrated MAX6226ALA33+
- Part No.:
- MAX6226ALA33+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-CLCC
- Datasheet:
-
MAX6226ALA33+.pdf
- Description:
- IC VREF SERIES 8CLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,378
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Product details
Overview
MAX6226ALA33+ from Analog Devices is an ultra-high-precision, ultra-low-noise series voltage reference delivering a stable 3.300V output with ±0.02% (max) initial accuracy, 3ppm/°C (max) temperature coefficient, and 1.95μVP-P (0.1Hz–10Hz) flicker noise. It operates from 3.5V to 12.6V supply, supports ±10mA load current, and is used in high-resolution ADC/DAC reference paths where long-term stability and low drift are critical.
For engineers reviewing the MAX6226ALA33+ datasheet, MAX6226ALA33+ pinout, MAX6226ALA33+ application, or MAX6226ALA33+ equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade (-40°C to +125°C) performance data, force/sense output architecture details, and real-world alternative part comparisons - all specific to the 3.3V variant in 8-pin ceramic LCC packaging.
Technical Context
The MAX6226ALA33+ implements a curvature-corrected, laser-trimmed thin-film resistor architecture enabling 3ppm/°C max tempco and 11ppm/1000hr long-term drift. Its proprietary low-noise core achieves 1.95μVP-P (0.1Hz–10Hz) and 100nV/√Hz (1kHz, no NR cap) without elevated quiescent current - maintaining only 380μA typical IIN.
It features independent force (OUTF) and sense (OUTS) outputs for Kelvin sensing, reducing line-drop errors in precision current sources and DAC references. The NR pin accepts a 0.1μF capacitor to lower wideband noise to 60nV/√Hz and improve AC PSRR, while remaining stable with 0.1μF–10μF load capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.300V ±0.02% at +25°C - enables direct interface with 3.3V logic and ADCs without scaling. |
| Tempco (max) | 3ppm/°C over -40°C to +125°C - ensures ≤±0.01% output shift across full automotive range. |
| Flicker Noise | 1.95μVP-P (0.1Hz–10Hz) - minimizes low-frequency error in precision weighing and sensor front-ends. |
| Wideband Noise | 100nV/√Hz @1kHz (no NR cap); 60nV/√Hz @1kHz (with 0.1μF NR cap) - reduces quantization noise in 16-bit+ systems. |
| Dropout Voltage | 0.2V max at 5mA load - allows operation from 3.5V supply with margin for rail variation. |
| Load Regulation | 40μV/mA (source), 200μV/mA (sink) - maintains <0.0012% output change per mA load shift. |
| Long-Term Drift | 11ppm/1000hr - supports >10-year calibration intervals in metrology and test equipment. |
Pinout & Package
MAX6226ALA33+ is housed in an 8-pin hermetically sealed ceramic LCC (Leadless Chip Carrier) package (outline 21-100289), offering superior humidity immunity and mechanical stability versus plastic packages - critical for long-term drift performance in industrial and automotive environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - NR | Noise Reduction Input | Accepts 0.1μF capacitor to reduce wideband noise from 100nV/√Hz to 60nV/√Hz and improve AC PSRR. |
| 2 - IN | Positive Supply Input | Operates from 3.5V to 12.6V; supplies internal reference core and output stage with 380μA typical current. |
| 4 - GND | Analog Ground Reference | Return path for reference output and internal circuitry; must be low-impedance and isolated from digital ground. |
| 5 - OUTS | Sense Output (High-Impedance) | Provides feedback path for remote voltage regulation; connects directly to load point to cancel trace IR drop. |
| 6 - OUTF | Force Output (Current-Driven) | Delivers up to 10mA source/sink current to load; shorted to OUTS near load for Kelvin connection. |
| 3, 7, 8 - I.C. | Internally Connected | No external connection permitted; internal die connections only - floating or grounded traces cause stress-induced drift. |
Key Features
| Feature | Design Value |
|---|---|
| Force/Sense Output Architecture | Enables true Kelvin sensing - eliminates voltage drop error on PCB traces between IC and load, critical for sub-0.01% accuracy. |
| Ultra-Low Flicker Noise (1.95μVP-P) | Reduces low-frequency measurement uncertainty in precision instrumentation and high-resolution weigh scales. |
| Curvature-Corrected Tempco (3ppm/°C max) | Guarantees minimal parabolic output deviation across -40°C to +125°C - essential for ATE and automotive control units. |
| Stable with 0.1μF–10μF Load Capacitance | Eliminates need for external compensation networks; supports both fast transient response (0.1μF) and ripple suppression (10μF). |
| Hermetic Ceramic LCC Package | Prevents humidity-induced drift and mechanical stress migration - delivers 11ppm/1000hr long-term stability vs. >50ppm/1000hr in plastic packages. |
Applications
| High-Resolution Data Acquisition | Precision Current Sources |
|---|---|
Use Scenario: 16-bit+ SAR or sigma-delta ADCs in portable test equipment requiring <0.01% total unadjusted error (TUE) over temperature. IC Role / Device Role / Timing Role: Primary voltage reference for ADC VREF input, providing stable 3.300V with <3ppm/°C drift and <2μVP-P integrated noise. Use Value: Enables 16-bit ENOB maintenance across -40°C to +85°C without recalibration, reducing system-level calibration overhead by >70%. |
Use Scenario: Programmable current source for LED biasing and sensor excitation in industrial transmitters. IC Role / Device Role / Timing Role: Force/sense reference driving MOSFET gate to regulate current through sense resistor with remote sensing. Use Value: Achieves <0.02% current accuracy over temperature and line variations - eliminating need for four-wire shunt measurement. |
| Digital Voltmeters (DVMs) | Automotive Process Control |
Use Scenario: Benchtop and handheld DVMs requiring 6½-digit resolution and <10ppm/year drift specification. IC Role / Device Role / Timing Role: Master reference for dual-slope or auto-zeroed integrator stages, referenced against internal 3.300V standard. Use Value: Contributes <11ppm/1000hr long-term stability and <5ppm thermal hysteresis - meeting ANSI C12.20 Class 0.1 accuracy requirements. |
Use Scenario: Closed-loop engine control units (ECUs) monitoring exhaust gas oxygen sensors and fuel injector drivers. IC Role / Device Role / Timing Role: Stable 3.3V reference for analog front-end signal conditioning and ADC conversion of sensor outputs. Use Value: Maintains <±0.02% output accuracy across -40°C to +125°C ambient - ensuring consistent sensor interpretation under extreme thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR4533BRZ | 3.3V output, ±0.02% initial accuracy, 3ppm/°C tempco, but higher 2.25μVP-P flicker noise and 120nV/√Hz wideband noise. | Lacks force/sense outputs - requires external Kelvin wiring or suffers trace IR error in high-current loads. | Select when board space is constrained and noise sensitivity is moderate; avoid in sub-16-bit systems or remote-sensing layouts. |
| REF5033IDR | 3.3V output, ±0.05% initial accuracy, 3ppm/°C tempco, 3.5μVP-P flicker noise, and no NR pin - fixed 1.2mA quiescent current. | Higher supply current limits use in battery-powered instruments; no noise-reduction option restricts wideband SNR optimization. | Choose for cost-sensitive industrial designs where 0.05% accuracy suffices and power budget exceeds 1mA; not suitable for portable metrology. |
Compared with ADR4533BRZ and REF5033IDR, MAX6226ALA33+ uniquely combines force/sense architecture, 1.95μVP-P flicker noise, and 0.1μF NR-capacitor support - making it the only option among the three capable of sustaining <0.01% system-level accuracy in remote-sensed, low-drift, battery-constrained applications.
Availability
MAX6226ALA33+ is available at Aetrix Electronics and suitable for high-accuracy data acquisition, automotive process control, and portable metrology applications requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for MAX6226ALA33+ 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 technologies, serving industrial, automotive, communications, and healthcare markets with precision signal chain solutions.
The MAX6226 series belongs to Analog Devices' ultra-precision voltage reference product line, engineered specifically for applications demanding sub-0.02% accuracy, <3ppm/°C tempco, and ultra-low noise in harsh thermal and long-duration operational environments.
FAQ
What is the maximum supply voltage for MAX6226ALA33+?
The MAX6226ALA33+ supports a supply voltage range of 3.5V to 12.6V. This upper limit is guaranteed by line-regulation testing and remains valid across the full -40°C to +125°C operating temperature range. Exceeding 12.6V risks permanent damage, as specified in the absolute maximum ratings table.
Does MAX6226ALA33+ require an external resistor like shunt references?
No, MAX6226ALA33+ is a series-mode voltage reference and does not require an external current-setting resistor. Its quiescent supply current is virtually independent of supply voltage (380μA typical), eliminating wasted current and simplifying design compared to two-terminal shunt references.
Can MAX6226ALA33+ drive a 10mA load while maintaining accuracy?
Yes, MAX6226ALA33+ guarantees load regulation of ≤40μV/mA when sourcing 0–10mA and ≤200μV/mA when sinking -10mA to 0mA. At 10mA load, output shift remains within ±0.0004V - well within its ±0.02% (±660μV) initial accuracy spec.
How does the NR pin improve noise performance in MAX6226ALA33+?
The NR pin on MAX6226ALA33+ accepts a 0.1μF capacitor to reduce wideband noise from 100nV/√Hz to 60nV/√Hz at 1kHz and improve AC power-supply rejection. This is achieved via internal noise-shaping circuitry that filters supply-coupled transients without increasing quiescent current.
Is MAX6226ALA33+ compatible with standard 8-pin LCC footprints?
Yes, MAX6226ALA33+ uses the industry-standard 8-pin ceramic LCC package (outline 21-100289, land pattern 90-100097). Pin 8 is internally connected and must remain unconnected - no copper or solder mask should be placed beneath its pad to prevent die stress and long-term drift.
MAX6226ALA33+ 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):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Tolerance:
- ±0.02%
- Temperature Coefficient:
- 3ppm/°C
- Noise - 0.1Hz to 10Hz:
- 1.95µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 3.5V ~ 12.6V
- Current - Supply:
- 725µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-CLCC (3.8x3.8)
MAX6226ALA33+ FAQ
1.How can I place an order for MAX6226ALA33+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6226ALA33+ 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 MAX6226ALA33+ reliable?
The price and inventory of MAX6226ALA33+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6226ALA33+ is usually 5 days.
3.What payment methods are accepted for MAX6226ALA33+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6226ALA33+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6226ALA33+?
MAX6226ALA33+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6226ALA33+ 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 MAX6226ALA33+?
For technical support, including MAX6226ALA33+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6226ALA33+ requirements.
6.How does Aetrix verify that MAX6226ALA33+ is sourced from the original manufacturer or authorized distributors?
All MAX6226ALA33+ 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 MAX6226ALA33+ meets industry standards.
7.What is the process for return or replacement of MAX6226ALA33+?
All MAX6226ALA33+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6226ALA33+, 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 MAX6226ALA33+ part is unused and in its original packaging.
Return procedure for MAX6226ALA33+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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