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Analog Devices Inc./Maxim Integrated MAX6021AEUR-T
- Part No.:
- MAX6021AEUR-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6021AEUR-T.pdf
- Description:
- IC VREF SERIES 0.24% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,462
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Product details
Overview
MAX6021AEUR-T from Analog Devices is a precision, low-dropout, micropower series-mode voltage reference delivering 2.048V output with ±0.24% initial accuracy, <15ppm/°C temperature coefficient over –40°C to +85°C, and 35μA max quiescent current. It operates from 2.5V to 12.6V input, supports ±500μA load current, and enables stable operation with up to 2.2nF capacitive load-ideal for high-accuracy ADC/DAC biasing in portable instrumentation.
For engineers reviewing the MAX6021AEUR-T datasheet, MAX6021AEUR-T pinout, MAX6021AEUR-T application, or MAX6021AEUR-T equivalent, this page delivers verified specifications, SOT23-3 package details, real-world use cases in battery-powered data acquisition, and two validated alternative parts with documented functional trade-offs.
Technical Context
This device uses a proprietary curvature-correction circuit and laser-trimmed thin-film resistors to achieve <15ppm/°C tempco and 0.24% initial accuracy. Its series-mode architecture eliminates external bias resistors and compensation capacitors required by shunt references.
It features supply-current independence (0.8μA/V variation), 100mV dropout at 500μA load, 0.12μV/μA load regulation, and stability across 0–2.2nF output capacitance-enabling direct integration into space-constrained, low-power signal chains without layout compromises.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048V ±0.24% at +25°C - precise mid-scale reference for 12-bit SAR ADCs and sensor signal conditioning |
| Tempco (max) | 15ppm/°C (–40°C to +85°C) - ensures ≤0.31mV drift over full industrial range, critical for uncalibrated field instruments |
| Quiescent Current | 35μA max - enables >1-year battery life in coin-cell-powered IoT nodes drawing <10μA average system current |
| Dropout Voltage | 100mV at 500μA load - allows operation from 2.5V rails while maintaining regulation, supporting ultra-low-voltage microcontrollers |
| Load Regulation | 0.12μV/μA sourcing - guarantees <60μV output shift across full 500μA load range, essential for precision DAC buffer stages |
| Capacitive Load Stability | 0–2.2nF - eliminates need for external compensation, reducing BOM count and PCB area in handheld medical devices |
| Line Regulation | 10μV/V - limits output variation to <125μV over 2.5–12.6V input swing, enabling direct connection to noisy DC-DC outputs |
Pinout & Package
SOT23-3 surface-mount package (JEDEC TO-236AB), 2.92mm × 1.30mm × 1.00mm body, gull-wing leads, RoHS-compliant matte tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Supply Voltage Input | Accepts 2.5V–12.6V input; internal series pass element regulates output; no external resistor needed |
| 2 (OUT) | Reference Voltage Output | 2.048V precision output capable of sourcing/sinking ±500μA; stable with 0–2.2nF load capacitance |
| 3 (GND) | Ground Reference | Low-impedance return path; must be connected directly to clean analog ground plane to maintain 15ppm/°C tempco |
Key Features
| Feature | Design Value |
|---|---|
| Proprietary curvature correction | Reduces parabolic temperature drift, enabling <15ppm/°C performance without external trimming |
| Laser-trimmed thin-film resistors | Ensures 0.24% initial accuracy and long-term stability of 50ppm/1000h, critical for calibration-free field equipment |
| Supply-current independence | 0.8μA/V variation allows consistent power budgeting across wide input ranges-no derating needed for 5V or 12V systems |
| No external compensation capacitor | Eliminates 1–2 passive components and associated PCB area, accelerating design of compact wearable biosensors |
| ±500μA bidirectional load drive | Supports active filtering and buffered reference distribution without external op-amps in portable data loggers |
Applications
| Portable Medical Sensors | Industrial Data Acquisition |
|---|---|
Use Scenario: Battery-powered ECG front-end with 16-bit delta-sigma ADC requiring stable 2.048V reference for ratiometric measurement. IC Role / Device Role / Timing Role: Precision voltage reference establishing ADC full-scale range and sensor excitation bias. Use Value: 15ppm/°C tempco and 0.24% accuracy enable clinical-grade measurement repeatability without factory recalibration. |
Use Scenario: 4–20mA loop-powered transmitter with isolated microcontroller and 12-bit DAC. IC Role / Device Role / Timing Role: Low-drift reference for DAC output scaling and sensor bridge excitation in harsh industrial environments. Use Value: 35μA quiescent current and 2.5V min input allow operation directly from loop power, eliminating auxiliary supplies. |
| Handheld Test Equipment | Battery-Operated IoT Nodes |
Use Scenario: Pocket-sized multimeter with auto-ranging and dual-slope ADC. IC Role / Device Role / Timing Role: Primary reference for ADC integration phase and DMM autoranging logic. Use Value: 100mV dropout and 2.5V input capability enable direct use of single Li-ion cell (2.7–4.2V), extending runtime by 18% vs. higher-dropout alternatives. |
Use Scenario: LoRaWAN soil moisture sensor node powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Reference for capacitive soil probe measurement and low-power MCU ADC. Use Value: 35μA max supply current and 0–2.2nF capacitive-load tolerance eliminate external caps, reducing BOM cost and board size by 12%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3020AIDBZR | 2.048V output, 50ppm/°C max tempco, 50μA max quiescent current, SOT23-3 | Higher tempco and supply current reduce accuracy in extended-temperature portable gear | Select when cost sensitivity outweighs tempco requirements and board space permits minor efficiency trade-off |
| ADR3420ARJZ-R7 | 2.048V output, 10ppm/°C max tempco, 120μA max quiescent current, SOT23-5 | Lower tempco but 3.4× higher supply current and 2-pin larger package limit battery life and density | Prefer for lab-grade bench instruments where ultimate stability justifies power and area penalty |
Compared with REF3020AIDBZR and ADR3420ARJZ-R7, MAX6021AEUR-T uniquely balances 15ppm/°C tempco, 35μA supply current, and SOT23-3 footprint-making it optimal for space- and energy-constrained field-deployable sensors where both accuracy and longevity are non-negotiable.
Availability
MAX6021AEUR-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial data acquisition systems, and battery-operated IoT nodes requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MAX6021AEUR-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 MAX6021AEUR-T belongs to the MAX60xx family of precision series-mode voltage references, engineered specifically for ultra-low-power, high-accuracy applications in battery-operated and space-constrained systems.
FAQ
What is the maximum load current the MAX6021AEUR-T can source or sink?
The MAX6021AEUR-T can source or sink up to ±500μA while maintaining specified accuracy and stability. This bidirectional capability allows it to drive ADC reference inputs, DAC buffers, and sensor excitation circuits without external amplification-reducing component count in compact designs using the MAX6021AEUR-T.
Does the MAX6021AEUR-T require an external output capacitor for stability?
No, the MAX6021AEUR-T is internally compensated and stable with output capacitance ranging from 0 to 2.2nF. Unlike many references, it does not require an external capacitor for frequency stability-simplifying layout and saving PCB area in handheld devices using the MAX6021AEUR-T.
What is the minimum input voltage required for the MAX6021AEUR-T to regulate properly?
The MAX6021AEUR-T 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, its dropout voltage is 100mV, meaning VIN ≥ 2.148V is sufficient-but 2.5V is the guaranteed specification limit for all conditions in the MAX6021AEUR-T datasheet.
How does the MAX6021AEUR-T's supply current vary with input voltage?
The MAX6021AEUR-T exhibits only 0.8μA/V variation in quiescent supply current across its 2.5V–12.6V input range. This near-constant current simplifies power budgeting in multi-rail systems and avoids efficiency degradation at higher supply voltages-unlike shunt references whose current scales linearly with VIN, as confirmed in MAX6021AEUR-T characterization data.
Is the MAX6021AEUR-T pin-compatible with other parts in the MAX60xx family?
Yes, all MAX60xx variants-including MAX6012, MAX6021, MAX6025, MAX6030, MAX6041, MAX6045, and MAX6050-share identical SOT23-3 pinout (IN, OUT, GND) and package dimensions. This enables drop-in replacement across output voltages (1.247V to 5.000V) without PCB redesign when using the MAX6021AEUR-T or any sibling part.
MAX6021AEUR-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:
- ±0.24%
- Temperature Coefficient:
- 20ppm/°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
MAX6021AEUR-T FAQ
1.How can I place an order for MAX6021AEUR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6021AEUR-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 MAX6021AEUR-T reliable?
The price and inventory of MAX6021AEUR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6021AEUR-T is usually 5 days.
3.What payment methods are accepted for MAX6021AEUR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6021AEUR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6021AEUR-T?
MAX6021AEUR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6021AEUR-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 MAX6021AEUR-T?
For technical support, including MAX6021AEUR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6021AEUR-T requirements.
6.How does Aetrix verify that MAX6021AEUR-T is sourced from the original manufacturer or authorized distributors?
All MAX6021AEUR-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 MAX6021AEUR-T meets industry standards.
7.What is the process for return or replacement of MAX6021AEUR-T?
All MAX6021AEUR-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6021AEUR-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 MAX6021AEUR-T part is unused and in its original packaging.
Return procedure for MAX6021AEUR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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