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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:3,813
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Product details
Overview
MAX6021AEUR+T from Analog Devices is a precision, low-dropout, micropower series-mode voltage reference in SOT23-3 package, delivering 2.048V ±0.24% initial accuracy, <15ppm/°C temperature coefficient over –40°C to +85°C, and 35μA max quiescent current. It sources/sinks ±500μA with 100mV dropout at full load and operates from 2.5V to 12.6V input, enabling use in battery-powered data acquisition and industrial sensor front-ends.
For engineers reviewing the MAX6021AEUR+T datasheet, MAX6021AEUR+T pinout, MAX6021AEUR+T application, or MAX6021AEUR+T equivalent, key selection criteria include output stability under capacitive loads up to 2.2nF, supply-current independence from VIN (0.8μA/V variation), and guaranteed performance across extended temperature range without external compensation.
Technical Context
The MAX6021AEUR+T employs 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 need for external bias resistor and supports bidirectional load current (±500μA) while maintaining stability with 0–2.2nF output capacitance.
It features ultra-low quiescent current (27–35μA), minimal line regulation (10μV/V typical), and load regulation (0.12μV/μA sourcing), making it suitable for low-voltage, space-constrained systems where power efficiency and board area are critical design constraints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048V ±0.24% at +25°C - precise reference for 12-bit ADCs and DACs requiring <1 LSB error at 2.5V full-scale |
| Tempco | <15ppm/°C (–40°C to +85°C) - ensures ≤0.31mV drift over full industrial temperature range |
| Quiescent Current | 27–35μA - enables >1-year battery life in coin-cell–powered IoT sensors drawing 10μA average system current |
| Dropout Voltage | 100mV at 500μA load - allows operation from 2.5V supply while maintaining 2.048V output, critical for single-cell Li-ion or alkaline systems |
| Load Regulation | 0.12μV/μA (sourcing) - guarantees <60μV output shift across full 500μA load range, supporting precision ratiometric sensing |
| Capacitive Load Stability | 0–2.2nF - eliminates need for external compensation capacitor, saving PCB area in portable medical or handheld test equipment |
| Supply Voltage Range | 2.5V to 12.6V - compatible with wide-input DC-DC outputs and unregulated battery rails without additional LDO |
Pinout & Package
SOT23-3 surface-mount package (JEDEC TO-236AB), 2.92mm × 1.30mm × 1.00mm body, RoHS-compliant, tape-and-reel packaging for automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Supply Voltage Input | Accepts 2.5V–12.6V input; internal series regulator draws only 35μA max regardless of VIN within range |
| 2 (OUT) | Reference Voltage Output | Provides stable 2.048V output; capable of sourcing or sinking ±500μA with <100mV dropout |
| 3 (GND) | Ground Reference | Return path for supply and load currents; must be low-impedance connection to minimize noise coupling into reference output |
Key Features
| Feature | Design Value |
|---|---|
| Initial Accuracy | ±0.24% (MAX6021A grade) - reduces calibration overhead in factory-trimmed instrumentation systems |
| Temperature Coefficient | <15ppm/°C - enables high-accuracy measurements in outdoor industrial controllers without thermal compensation |
| No External Compensation Required | Stable with 0–2.2nF CLOAD - removes BOM item and layout risk associated with capacitor selection and placement |
| Supply-Current Independence | 0.8μA/V VIN variation - eliminates supply-rail dependency in multi-rail systems, simplifying power budgeting |
| Bidirectional Load Drive | ±500μA sourcing/sinking - supports active filtering, biasing of op-amp inputs, and driving ADC reference inputs directly |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental monitoring node sampling temperature/humidity every 10 seconds using 12-bit SAR ADC. IC Role / Device Role / Timing Role: Precision voltage reference for ADC VREF input, ensuring consistent full-scale definition across temperature and battery discharge. Use Value: 0.24% initial accuracy and <15ppm/°C drift maintain <0.5 LSB error over –25°C to +70°C operating range without recalibration. |
Use Scenario: 4–20mA loop-powered pressure transmitter with HART interface in oil & gas field instrumentation. IC Role / Device Role / Timing Role: Stable 2.048V reference for signal conditioning amplifier and DAC used in digital correction algorithm. Use Value: 35μA quiescent current enables full functionality within 3.5mA loop budget while maintaining 16-bit effective resolution. |
| Handheld Test Equipment | Battery Management Systems |
Use Scenario: Pocket-sized multimeter with auto-ranging analog front-end and dual-slope ADC. IC Role / Device Role / Timing Role: Primary reference for integrator capacitor charging and zero-reference generation during null cycles. Use Value: 100mV dropout allows direct operation from 2.5V LDO output, eliminating extra regulation stage and reducing bill-of-materials cost. |
Use Scenario: Cell voltage monitor IC in 3S Li-ion pack with integrated fuel gauge and protection logic. IC Role / Device Role / Timing Role: Reference for high-side current sense amplifier and cell voltage ADC inputs. Use Value: Stability with 2.2nF load capacitance permits integration of local decoupling without destabilizing reference output, improving EMI immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3420ARJZ-R7 | 2.048V, ±0.1% initial accuracy, 3ppm/°C max tempco, 12μA quiescent current, SOT23-5 package | Higher accuracy and lower tempco but requires 5-pin package and external bypass capacitor for stability | Select when sub-10ppm/°C drift and <0.1% accuracy are mandatory; accept larger footprint and added capacitor |
| REF3020AIDBZR | 2.048V, ±0.2% initial accuracy, 50ppm/°C max tempco, 40μA quiescent current, SOT23-3 package | Same 3-pin footprint but higher tempco limits use in wide-temperature industrial environments | Choose for cost-sensitive designs where 50ppm/°C drift is acceptable and board space matches SOT23-3 layout |
Compared with ADR3420ARJZ-R7 and REF3020AIDBZR, the MAX6021AEUR+T delivers optimal balance of industrial-grade tempco (<15ppm/°C), ultra-low dropout (100mV), and true 3-pin simplicity-enabling high-precision references in space-constrained, battery-operated systems without layout or BOM penalties.
Availability
MAX6021AEUR+T is available at Aetrix Electronics and suitable for portable data loggers, industrial sensor transmitters, and handheld test equipment 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 designed specifically for low-power, low-dropout operation in space- and energy-constrained embedded 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 dropout voltage. At 500μA load, dropout is guaranteed ≤200mV, and output voltage shift remains within 0.12μV/μA for sourcing and 0.18μV/μA for sinking per the datasheet's Electrical Characteristics table for MAX6021.
Does the MAX6021AEUR+T require an external output capacitor for stability?
No, the MAX6021AEUR+T is internally compensated and stable with output capacitance from 0 to 2.2nF. An external capacitor is optional and only recommended in applications with fast load or supply transients to improve transient response-no capacitor is needed for basic stability, reducing BOM count and PCB area.
What is the supply voltage range for the MAX6021AEUR+T?
The MAX6021AEUR+T operates from 2.5V to 12.6V input voltage. The minimum input is defined by the dropout requirement: for reliable regulation, VIN must exceed VOUT (2.048V) by at least 100mV, hence the 2.5V lower limit ensures margin across temperature and process variation.
How does the MAX6021AEUR+T compare to shunt-mode voltage references in terms of supply current efficiency?
Unlike shunt-mode references that waste current through an external resistor, the MAX6021AEUR+T draws only 27–35μA quiescent current independent of input voltage (0.8μA/V variation). This eliminates wasted bias current and enables efficient operation across varying battery voltages without redesigning the bias network.
Is the MAX6021AEUR+T pin-compatible with other devices in 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 layout changes.
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:
- Active
- 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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