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Analog Devices Inc./Maxim Integrated MAX6226ALA33+T
- Part No.:
- MAX6226ALA33+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-CLCC
- Datasheet:
-
MAX6226ALA33+T.pdf
- Description:
- IC VREF SERIES 8CLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,381
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Product details
Overview
MAX6226ALA33+T 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 systems requiring metrology-grade stability.
For engineers reviewing the MAX6226ALA33+T datasheet, MAX6226ALA33+T pinout, MAX6226ALA33+T application, or MAX6226ALA33+T equivalent, key selection criteria include its force/sense output architecture for remote sensing, 200mV (max) dropout voltage at 10mA, 0.05Ω (max) load regulation, and ceramic LCC package enabling <11ppm/1000hr long-term drift in automotive (-40°C to +125°C) environments.
Technical Context
The MAX6226ALA33+T implements a curvature-corrected, laser-trimmed thin-film resistor architecture with proprietary low-noise reference core, achieving 3ppm/°C max TCVOUT over –40°C to +125°C and ±0.02% max initial accuracy at +25°C. Its dual-output force/sense topology (OUTF/OUTS) enables Kelvin sensing to cancel trace resistance errors in precision current sources and DAC references.
It features a dedicated NR pin supporting 0.1μF capacitor addition to reduce wideband noise from 100nV/√Hz to 60nV/√Hz at 1kHz while maintaining quiescent current near 380μA. The device remains stable with 0.1μF–10μF capacitive loads and exhibits 5ppm thermal hysteresis after full-temperature cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.300V ±0.02% (max) at +25°C - ensures absolute accuracy for 16-bit+ data converters without calibration. |
| Temp Coefficient | ≤3ppm/°C (–40°C to +125°C) - guarantees ≤±0.001% output drift across automotive temperature range. |
| Flicker Noise | 1.95μVP-P (0.1Hz–10Hz) - enables sub-20-bit effective resolution in precision measurement front-ends. |
| Wideband Noise | 60nV/√Hz at 1kHz with 0.1μF NR cap - reduces noise floor impact on high-speed ADC sampling clocks. |
| Dropout Voltage | ≤0.2V at 5mA load - allows operation from 3.5V supply with 3.3V output, critical for low-voltage industrial sensors. |
| Load Regulation | ≤0.05Ω (max) sourcing - maintains <±33μV output shift over 0–10mA load change, essential for programmable current sources. |
| Long-Term Drift | 11ppm/1000hr - ensures <±0.003% output change over 1 year, meeting calibration lab and ATE equipment requirements. |
Pinout & Package
MAX6226ALA33+T is housed in an 8-pin hermetically sealed ceramic LCC (Leadless Chip Carrier) package (outline 21-100289), offering superior humidity immunity and mechanical stress resistance versus plastic packages-critical for long-term stability in harsh environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - NR | Noise Reduction | Accepts 0.1μF capacitor to reduce wideband noise by 40% and improve PSRR; floating if unused. |
| 2 - IN | Positive Supply Input | Accepts 3.5V–12.6V input; supplies internal reference core with 380μA quiescent current. |
| 4 - GND | Ground Reference | Primary return path for supply and output currents; must be low-impedance for noise control. |
| 5 - OUTS | Sense Output | High-impedance feedback node for remote voltage regulation; connects directly to load point for Kelvin sensing. |
| 6 - OUTF | Force Output | Low-impedance power output driving load; shorted to OUTS near load to eliminate trace IR drop. |
| 3, 7, 8 - I.C. | Internally Connected | No external connection permitted; internal die connections only-must remain unattached per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Force/Sense Output Architecture | Enables true Kelvin connection to eliminate PCB trace resistance error in precision current sources and DAC references. |
| Ultra-Low Flicker Noise | 1.95μVP-P (0.1Hz–10Hz) - minimizes low-frequency drift in digital voltmeters and process control loop references. |
| Ceramic Hermetic Package | Eliminates humidity-induced output drift and reduces long-term drift to 11ppm/1000hr vs. plastic alternatives. |
| Wide Capacitive Load Stability | Stable with 0.1μF–10μF output capacitance - supports both fast transient response (0.1μF) and low-noise filtering (10μF). |
| Low Dropout & High Current Drive | 200mV max dropout at 10mA sink/source - enables single-supply operation in 3.3V systems with headroom margin. |
Applications
| High-Resolution Data Acquisition | Precision Current Sources |
|---|---|
|
Use Scenario: 16-bit+ SAR or sigma-delta ADC front-end in portable test equipment requiring <±1 LSB total error over temperature. IC Role / Device Role / Timing Role: Primary voltage reference establishing full-scale input range; force/sense outputs compensate for PCB trace resistance in sensor signal conditioning. Use Value: 3ppm/°C tempco and ±0.02% initial accuracy ensure <±0.5 LSB error contribution across –40°C to +125°C, eliminating system recalibration. |
Use Scenario: Programmable 4–20mA transmitter for industrial field instruments where loop accuracy must meet SIL-2 requirements. IC Role / Device Role / Timing Role: Precision current-setting reference; OUTF drives transistor base/emitter while OUTS senses across shunt resistor for closed-loop regulation. Use Value: 0.05Ω load regulation and 11ppm/1000hr long-term drift guarantee <±0.1% current accuracy over 10-year field life without maintenance. |
| ATE Equipment References | Digital Voltmeters |
|
Use Scenario: Calibration-grade reference in automated test systems verifying multimeter accuracy to 7½-digit resolution. IC Role / Device Role / Timing Role: Metrology-grade reference standard; ceramic LCC package prevents humidity-induced drift during extended bench testing. Use Value: 1.95μVP-P flicker noise and 5ppm thermal hysteresis enable repeatable sub-ppm measurements across thermal cycles. |
Use Scenario: Benchtop DVM reference subsystem requiring 0.001% basic accuracy and <10ppm/year stability. IC Role / Device Role / Timing Role: Primary DC reference for integrating ADC; NR pin capacitor suppresses switching noise from internal power rails. Use Value: 60nV/√Hz wideband noise with NR cap ensures <0.1μV RMS noise floor, supporting 8½-digit resolution in quiet measurement modes. |
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 3.5μVP-P flicker noise and no force/sense outputs. | Lacks Kelvin sensing capability; unsuitable for high-current remote-sensing current sources. | Select when board space is constrained and force/sense is unnecessary; requires external compensation for trace resistance. |
| REF5033IDR | 3.3V output, ±0.05% initial accuracy, 3ppm/°C tempco, 2.5μVP-P flicker noise, SOIC-8 package (non-hermetic). | Higher initial error and plastic packaging increase long-term drift risk in humid environments. | Choose for cost-sensitive industrial controls where 11ppm/1000hr ceramic stability is not required. |
Compared with ADR4533BRZ and REF5033IDR, MAX6226ALA33+T uniquely combines force/sense outputs, ceramic hermeticity, and 1.95μVP-P flicker noise-making it the only option qualified for metrology-grade current sources and ATE references demanding sub-ppm repeatability.
Availability
MAX6226ALA33+T is available at Aetrix Electronics and suitable for high-resolution data acquisition, precision current sources, ATE equipment references, and digital voltmeters requiring stable component supply under automotive temperature conditions.
Supply support for MAX6226ALA33+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 aerospace markets since 1965.
The MAX6226 series was designed specifically for metrology-grade voltage references in automotive-grade environments, emphasizing ultra-low noise, hermetic packaging, and force/sense architecture for uncompromised DC accuracy.
FAQ
What is the maximum supply voltage for MAX6226ALA33+T?
The MAX6226ALA33+T supports a supply voltage range of 3.5V to 12.6V. This wide input range allows operation from common industrial rails (e.g., 5V, 12V) while maintaining 3.300V output accuracy. Exceeding 12.6V risks permanent damage, as specified in the Absolute Maximum Ratings table.
Does MAX6226ALA33+T require an external resistor like shunt references?
No, MAX6226ALA33+T is a series-mode voltage reference and does not require an external current-setting resistor. Its quiescent supply current remains ~380μA across the full 3.5V–12.6V input range, unlike shunt references that waste supply current and demand precise external resistor values.
How does the force/sense (OUTF/OUTS) feature improve accuracy in MAX6226ALA33+T?
The OUTF/OUTS pins enable Kelvin sensing: OUTF delivers current to the load, while OUTS provides high-impedance feedback at the load point. Shorting them near the load cancels voltage drop across PCB traces-reducing error from trace resistance, especially critical in precision current sources and DAC references.
Can MAX6226ALA33+T drive a 10μF output capacitor?
Yes, MAX6226ALA33+T is stable with output capacitance from 0.1μF to 10μF. A 10μF capacitor improves transient response for rapidly changing loads, while a parallel 0.1μF capacitor suppresses high-frequency noise-both configurations are validated in the datasheet's Typical Operating Characteristics.
What is the long-term stability specification for MAX6226ALA33+T?
MAX6226ALA33+T exhibits 11ppm typical long-term drift over 1000 hours at +25°C, as measured per JEDEC JESD22-A117. This performance is enabled by laser-trimmed thin-film resistors and hermetic ceramic packaging, making it suitable for calibration standards and ATE equipment requiring multi-year stability.
MAX6226ALA33+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):
- 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+T FAQ
1.How can I place an order for MAX6226ALA33+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6226ALA33+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 MAX6226ALA33+T reliable?
The price and inventory of MAX6226ALA33+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6226ALA33+T is usually 5 days.
3.What payment methods are accepted for MAX6226ALA33+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6226ALA33+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6226ALA33+T?
MAX6226ALA33+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6226ALA33+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 MAX6226ALA33+T?
For technical support, including MAX6226ALA33+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6226ALA33+T requirements.
6.How does Aetrix verify that MAX6226ALA33+T is sourced from the original manufacturer or authorized distributors?
All MAX6226ALA33+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 MAX6226ALA33+T meets industry standards.
7.What is the process for return or replacement of MAX6226ALA33+T?
All MAX6226ALA33+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6226ALA33+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 MAX6226ALA33+T part is unused and in its original packaging.
Return procedure for MAX6226ALA33+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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