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Analog Devices Inc./Maxim Integrated MAX6021BEUR-T
- Part No.:
- MAX6021BEUR-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6021BEUR-T.pdf
- Description:
- IC VREF SERIES 0.39% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,455
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Product details
Overview
MAX6021BEUR-T from Analog Devices is a precision series-mode voltage reference IC in SOT23-3 package, delivering 2.048V ±0.39% initial accuracy with ≤25ppm/°C temperature coefficient over –40°C to +85°C. It draws only 35μA quiescent current, supports ±500μA load sourcing/sinking, and maintains stability with up to 2.2nF capacitive load-ideal for battery-powered data acquisition systems.
For engineers reviewing the MAX6021BEUR-T datasheet, MAX6021BEUR-T pinout, MAX6021BEUR-T application, or MAX6021BEUR-T equivalent, key selection criteria include low dropout (100mV at 500μA), supply-current independence (0.8μA/V variation), and no external compensation capacitor requirement.
Technical Context
This bandgap-based series reference uses proprietary curvature-correction circuitry and laser-trimmed thin-film resistors to achieve high initial accuracy and low thermal drift. Its internal compensation eliminates need for external stabilization capacitors while supporting full 0–2.2nF load capacitance range.
The device operates as a three-terminal active regulator: IN accepts 2.5V–12.6V input, OUT delivers stable 2.048V reference, and GND provides return path. It functions across full industrial temperature range without performance derating and exhibits 130ppm output voltage hysteresis after thermal cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048V ±0.39% at +25°C - ensures precise ADC/DAC biasing within tight tolerance bands |
| Temp Coefficient | ≤25ppm/°C (–40°C to +85°C) - minimizes system-level drift in outdoor or industrial environments |
| Quiescent Current | 35μA max - enables multi-year operation on coin-cell batteries in portable sensors |
| Dropout Voltage | 100mV at 500μA load - allows use with 2.5V supplies while maintaining regulation |
| Load Regulation | 0.55μV/μA sourcing - holds output error <0.275mV across full 500μA load swing |
| Line Regulation | 100μV/V - limits output shift to <100μV per volt of input variation |
| Capacitive Stability | 0–2.2nF - eliminates mandatory output capacitor, saving PCB area in space-constrained designs |
Pinout & Package
SOT23-3 surface-mount package (3.04mm × 1.40mm × 1.12mm), RoHS-compliant, with gull-wing leads and coplanarity ≤0.10mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Supply Input | Accepts 2.5V–12.6V unregulated input; supplies internal bandgap core and output stage |
| 2 (OUT) | Reference Output | Delivers regulated 2.048V with sourcing/sinking capability up to ±500μA |
| 3 (GND) | Ground Reference | Provides return path for supply and load currents; must be low-impedance for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Proprietary curvature correction | Reduces second-order thermal errors, enabling ≤25ppm/°C drift without external trimming |
| Laser-trimmed thin-film resistors | Guarantees 2.048V output with ±0.39% initial accuracy across production lots |
| No external compensation capacitor | Eliminates BOM item and layout area; simplifies design for wearables and handheld medical devices |
| Supply-current independence | 0.8μA/V VIN variation ensures predictable power budget across wide input range |
| Stable with zero load capacitance | Enables direct connection to high-impedance inputs (e.g., SAR ADC reference pins) without oscillation risk |
Applications
| Hand-Held Test Equipment | Data Acquisition Systems |
|---|---|
Use Scenario: Portable multimeter requiring stable reference for 16-bit ADC conversion under varying battery voltage. IC Role / Device Role / Timing Role: Primary voltage reference for analog front-end, directly driving ADC VREF pin. Use Value: 100mV dropout enables operation down to 2.15V battery voltage while maintaining 2.048V reference accuracy. | Use Scenario: Industrial sensor node digitizing thermocouple outputs with cold-junction compensation. IC Role / Device Role / Timing Role: Precision excitation source for RTD bridges and reference for sigma-delta ADC. Use Value: 25ppm/°C tempco ensures <±0.05°C measurement error over full operating temperature range. |
| Battery-Operated Medical Sensors | Hard-Disk Drive Servo Control |
Use Scenario: Wearable ECG monitor powered by CR2032 coin cell, requiring ultra-low quiescent current. IC Role / Device Role / Timing Role: Reference for instrumentation amplifier gain-setting and ADC conversion. Use Value: 35μA max supply current extends battery life beyond 3 years in intermittent-sampling mode. | Use Scenario: HDD head-positioning servo loop needing stable reference for DAC-driven voice-coil motor control. IC Role / Device Role / Timing Role: Bias reference for DAC output stage and feedback comparator threshold. Use Value: 0.55μV/μA load regulation prevents position error drift during rapid actuator current transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6021AEUR+T | 0.24% initial accuracy (vs. 0.39% for MAX6021BEUR-T); same tempco, package, and electrical specs | Higher-accuracy systems like calibration equipment where ±0.24% tolerance is mandatory | Select MAX6021AEUR+T when tighter initial tolerance is required; otherwise MAX6021BEUR-T offers cost advantage |
| ADR3420ARJZ-R7 | 2.048V output, 10ppm/°C max tempco, 4μA typical quiescent current but only 10mA max load sink/source | Ultra-low-power IoT nodes where sub-10μA supply current is critical and load current ≤100μA | Choose ADR3420ARJZ-R7 for microamp-level power budgets; MAX6021BEUR-T preferred for higher load drive capability |
Compared with MAX6021AEUR+T, MAX6021BEUR-T trades 0.15% initial accuracy for lower cost while retaining identical temperature stability and package. Against ADR3420ARJZ-R7, it delivers 50× more load current at the expense of ~8× higher quiescent current-making it suitable for moderate-power precision systems.
Availability
MAX6021BEUR-T is available at Aetrix Electronics and suitable for hand-held test equipment, data acquisition systems, and battery-operated medical sensors requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6021BEUR-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 industrial, automotive, communications, and healthcare markets.
The MAX6021BEUR-T belongs to the MAX60xx precision voltage reference product line, engineered for low-power, low-dropout operation in space-constrained and battery-sensitive applications where accuracy and thermal stability are critical.
FAQ
What is the maximum load current the MAX6021BEUR-T can source or sink?
The MAX6021BEUR-T can source and sink up to ±500μA while maintaining specified accuracy and stability. This capability supports direct driving of ADC reference inputs, op-amp bias networks, and small DAC loads without external buffering. Exceeding this limit may cause output voltage deviation beyond datasheet tolerances or thermal stress.
Does the MAX6021BEUR-T require an external output capacitor for stability?
No, the MAX6021BEUR-T is internally compensated and stable with 0–2.2nF load capacitance. An external capacitor is optional and used only to improve transient response in applications with step-load changes-not required for basic stability. This eliminates a common BOM item and saves PCB area.
What is the minimum input voltage required for the MAX6021BEUR-T to regulate properly?
The MAX6021BEUR-T requires a minimum input voltage of 2.5V to maintain regulation. At 500μA load, its dropout voltage is 100mV, meaning it sustains 2.048V output down to VIN = 2.148V-but guaranteed operation begins at VIN ≥ 2.5V per datasheet specifications.
How does the MAX6021BEUR-T compare to shunt-mode references in terms of supply current efficiency?
Unlike shunt-mode references that waste current through a series resistor, the MAX6021BEUR-T draws only 35μA quiescent current independent of load-plus 0.8μA/V variation with input voltage. This architecture avoids fixed bias current waste, improving battery life in always-on systems and simplifying power budgeting.
Is the MAX6021BEUR-T pin-compatible with other members of the MAX60xx family?
Yes, all MAX60xx devices-including MAX6012, MAX6021, MAX6025, MAX6030, MAX6041, MAX6045, and MAX6050-share identical SOT23-3 pinout (IN, OUT, GND) and package dimensions. This allows drop-in replacement across output voltages (1.247V to 5.000V) without PCB redesign.
MAX6021BEUR-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 500 µA
- Tolerance:
- ±0.39%
- Temperature Coefficient:
- 30ppm/°C
- Noise - 0.1Hz to 10Hz:
- 35µVp-p
- Noise - 10Hz to 10kHz:
- 105µVrms
- Voltage - Input:
- 2.5V ~ 12.6V
- Current - Supply:
- 35µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6021BEUR-T FAQ
1.How can I place an order for MAX6021BEUR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6021BEUR-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 MAX6021BEUR-T reliable?
The price and inventory of MAX6021BEUR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6021BEUR-T is usually 5 days.
3.What payment methods are accepted for MAX6021BEUR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6021BEUR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6021BEUR-T?
MAX6021BEUR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6021BEUR-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 MAX6021BEUR-T?
For technical support, including MAX6021BEUR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6021BEUR-T requirements.
6.How does Aetrix verify that MAX6021BEUR-T is sourced from the original manufacturer or authorized distributors?
All MAX6021BEUR-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 MAX6021BEUR-T meets industry standards.
7.What is the process for return or replacement of MAX6021BEUR-T?
All MAX6021BEUR-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6021BEUR-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 MAX6021BEUR-T part is unused and in its original packaging.
Return procedure for MAX6021BEUR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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