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Analog Devices Inc./Maxim Integrated MAX6021BEUR
- Part No.:
- MAX6021BEUR
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6021BEUR.pdf
- Description:
- PRECISION, LOW-POWER, LOW-DROPOU
- Quantity:
- Payment:
- Shipping:
Inventory:1,772
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Product details
Overview
MAX6021BEUR from Maxim Integrated is a precision, low-dropout, micropower series-mode voltage reference in SOT23-3 package, delivering 2.048V ±0.39% initial accuracy, <20ppm/°C temperature coefficient over –40°C to +85°C, and 100mV dropout at 500μA load. It operates from 2.5V to 12.6V input and serves as a stable reference in battery-powered data acquisition and industrial sensor signal chains.
For engineers reviewing the MAX6021BEUR datasheet, MAX6021BEUR pinout, MAX6021BEUR application, or MAX6021BEUR equivalent, key selection considerations include its supply-current independence (0.8μA/V variation), ±500μA sourcing/sinking capability, stability with up to 2.2nF capacitive load, and absence of external compensation requirements.
Technical Context
The MAX6021BEUR employs a proprietary curvature-correction circuit and laser-trimmed thin-film resistors to achieve high initial accuracy and ultra-low temperature drift. Its series-mode architecture eliminates dependency on external biasing resistors and enables supply current virtually independent of VIN.
Internally compensated for stability across 0–2.2nF load capacitance, it avoids external compensation capacitors-critical for space-constrained portable designs. The device supports bidirectional output current (±500μA) and maintains regulation under line/load transients typical in low-voltage embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048V ±0.39% at +25°C - ensures precise ADC/DAC biasing without calibration overhead |
| Temp Coefficient | ≤20ppm/°C (–40°C to +85°C) - guarantees <±0.17mV drift over full industrial range |
| Quiescent Current | ≤35μA - enables multi-year operation on coin-cell batteries in always-on sensors |
| Dropout Voltage | 100mV at 500μA load - allows operation from 2.5V supply while maintaining 2.048V output |
| Load Regulation | 0.12–0.70μV/μA - minimizes output shift during dynamic load changes in mixed-signal circuits |
| Line Regulation | 10–100μV/V - suppresses supply ripple impact on reference integrity in noisy power domains |
| Capacitive Load Stability | 0–2.2nF - permits direct connection to ADC input caps or filtering networks without oscillation risk |
Pinout & Package
SOT23-3 surface-mount package (3-pin, 1.3mm × 2.9mm footprint), RoHS-compliant, rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Supply Voltage Input | Accepts 2.5V–12.6V input; supplies internal bandgap core and output stage |
| 2 (OUT) | Reference Voltage Output | Provides regulated 2.048V output; sources or sinks up to ±500μA with low impedance |
| 3 (GND) | Ground Reference | Return path for supply and load current; must be low-impedance to maintain accuracy |
Key Features
| Feature | Design Value |
|---|---|
| Initial Accuracy | ±0.39% (MAX6021B grade) - reduces system-level calibration steps in production test |
| Supply-Current Independence | 0.8μA/V variation - eliminates supply-rail dependency in multi-voltage systems |
| No External Compensation | Stable with 0–2.2nF CLOAD - saves PCB area and BOM cost vs. shunt references |
| Low Dropout | 100mV @ 500μA - enables use with Li-ion (3.0V min) or dual-cell alkaline (2.4V min) supplies |
| Bidirectional Output Drive | ±500μA sink/source - supports active filtering, current-mode DAC interfaces, and rail-to-rail op-amp biasing |
Applications
| Hand-Held Test Equipment | Data Acquisition Systems |
|---|---|
Use Scenario: Portable multimeter front-end requiring stable reference for 16-bit SAR ADC sampling. IC Role / Device Role / Timing Role: Precision voltage reference establishing ADC full-scale range. Use Value: 2.048V output matches common 2n scaling (e.g., 2.048V = 1 LSB × 216), minimizing digital gain error. |
Use Scenario: Industrial PLC analog input module measuring 4–20mA sensor loops. IC Role / Device Role / Timing Role: Reference for precision current-to-voltage conversion and ADC digitization. Use Value: <20ppm/°C drift ensures <±0.03% reading error over –40°C to +85°C ambient. |
| Industrial Process Control | Battery-Operated IoT Sensors |
Use Scenario: Loop-powered transmitter with HART modulation requiring stable excitation voltage. IC Role / Device Role / Timing Role: Low-power, high-stability reference for DAC-controlled 4–20mA output stage. Use Value: 35μA quiescent current enables continuous operation on 24V loop power with margin for HART signaling. |
Use Scenario: Wireless environmental node (temperature/humidity) powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Reference for ultra-low-power ADC and sensor signal conditioning. Use Value: 100mV dropout allows >95% battery utilization down to 2.15V, extending field life beyond 5 years. |
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 (tighter tolerance), same tempco and package | Preferred where factory calibration is omitted and higher-grade accuracy is required | Select for metrology-grade sensor nodes or uncalibrated instrumentation |
| ADR3420BRJZ-R7 | 2.048V output, ±0.1% initial accuracy, 3ppm/°C max tempco, 4.5μA quiescent current | Lower power but requires ≥2.3V supply; not stable with >1nF load without external cap | Choose when ultra-low IQ dominates and board space allows compensation capacitor |
Compared with MAX6021BEUR, the MAX6021AEUR-T offers tighter initial accuracy at identical power and stability, while the ADR3420BRJZ-R7 trades higher precision and lower quiescent current for stricter supply constraints and reduced capacitive-load tolerance-making MAX6021BEUR optimal for robust, space-limited, wide-input industrial designs.
Availability
MAX6021BEUR is available at Aetrix Electronics and suitable for hand-held test equipment, industrial process-control systems, and battery-operated IoT sensors requiring stable component supply with guaranteed long-term continuity.
Supply support for MAX6021BEUR 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
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for demanding industrial, medical, and communications applications.
The MAX6012 family-including MAX6021BEUR-is engineered for ultra-low-power, high-accuracy voltage referencing in space- and energy-constrained systems where stability, small size, and supply flexibility are critical.
FAQ
What is the maximum load current the MAX6021BEUR can source or sink?
The MAX6021BEUR can source or sink up to ±500μA while maintaining specified accuracy and dropout performance. This bidirectional capability supports active filtering, current-steering DAC interfaces, and op-amp biasing without external buffers. Exceeding ±500μA may cause output voltage deviation beyond datasheet limits or increased dropout.
Does the MAX6021BEUR require an external output capacitor for stability?
No, the MAX6021BEUR is internally compensated and stable with output capacitance ranging from 0 to 2.2nF. An external capacitor is optional and only recommended to improve transient response in applications with fast load or supply steps-not for stability. Omitting it saves board area and BOM cost.
What is the minimum input voltage required for the MAX6021BEUR to regulate properly?
The MAX6021BEUR requires a minimum input voltage of 2.5V to maintain regulation across its full operating temperature range (–40°C to +85°C). At 500μA load, dropout is 100mV, so VIN must be ≥2.148V to sustain 2.048V output-but 2.5V is the guaranteed minimum per datasheet specifications.
How does the supply current of the MAX6021BEUR vary with input voltage?
The MAX6021BEUR exhibits only 0.8μA/V variation in quiescent supply current across its 2.5V–12.6V input range. This near-constant current (≤35μA max) simplifies power budgeting and eliminates supply-rail dependency-unlike shunt references whose current scales linearly with VIN.
Is the MAX6021BEUR pin-compatible with other devices in the MAX6012 family?
Yes, all MAX6012/MAX6021/MAX6025/MAX6030/MAX6041/MAX6045/MAX6050 variants share identical SOT23-3 pinout (IN, OUT, GND) and package dimensions. Swapping between output voltages (e.g., 2.048V → 4.096V) requires no PCB layout change-only firmware or resistor network updates for downstream circuitry.
MAX6021BEUR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- 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 FAQ
1.How can I place an order for MAX6021BEUR through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6021BEUR 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 reliable?
The price and inventory of MAX6021BEUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6021BEUR is usually 5 days.
3.What payment methods are accepted for MAX6021BEUR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6021BEUR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6021BEUR?
MAX6021BEUR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6021BEUR 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?
For technical support, including MAX6021BEUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6021BEUR requirements.
6.How does Aetrix verify that MAX6021BEUR is sourced from the original manufacturer or authorized distributors?
All MAX6021BEUR 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 meets industry standards.
7.What is the process for return or replacement of MAX6021BEUR?
All MAX6021BEUR units undergo pre-shipment inspection (PSI). If there is an issue with MAX6021BEUR, 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 part is unused and in its original packaging.
Return procedure for MAX6021BEUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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