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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:934
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Product details
Overview
The MAX6021BEUR+T from Analog Devices 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 35μA max quiescent current. It sources/sinks ±500μA with only 100mV dropout at full load and operates from 2.5V to 12.6V input, enabling use in battery-powered data acquisition and industrial sensor signal conditioning.
For engineers reviewing the MAX6021BEUR+T datasheet, MAX6021BEUR+T pinout, MAX6021BEUR+T application, or MAX6021BEUR+T equivalent, key selection criteria include output voltage tolerance, temperature drift stability, supply-current independence from VIN, capacitive-load compatibility up to 2.2nF, and absence of external compensation requirements.
Technical Context
This device uses a proprietary curvature-correction circuit and laser-trimmed thin-film resistors to achieve precision bandgap performance. Its series-mode architecture eliminates need for external bias resistors and enables supply current virtually independent of input voltage (0.8μA/V variation).
Internally compensated for stability with 0–2.2nF load capacitance, it avoids external compensation capacitors while maintaining 0.12μV/μA load regulation and 10μV/V line regulation - critical for low-noise ADC reference and portable instrumentation designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048V ±0.39% at +25°C; supports high-accuracy 12-bit to 16-bit ADC reference without trimming |
| Temp Coefficient | ≤20ppm/°C (–40°C to +85°C); ensures <±0.5mV drift across full industrial range |
| Quiescent Current | ≤35μA; enables >10-year battery life in coin-cell–powered IoT sensors |
| Dropout Voltage | 100mV at 500μA load; allows operation from 2.5V supply with 2.048V output |
| Load Current | ±500μA sourcing/sinking; drives ADC reference inputs and op-amp bias networks directly |
| Capacitive Load | Stable with 0–2.2nF; eliminates external capacitor in space-constrained PCB layouts |
| Line Regulation | 10μV/V; maintains output stability despite battery voltage sag during discharge |
Pinout & Package
SOT23-3 package (JEDEC TO-236AB), 2.92mm × 1.30mm × 1.00mm body, gull-wing leads, RoHS-compliant.
| 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 stable 2.048V output; connects directly to ADC REF+, op-amp VREF, or DAC bias |
| 3 (GND) | Ground Reference | Return path for supply and load current; must be low-impedance to minimize noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed thin-film resistors | Enables 0.39% initial accuracy and <20ppm/°C drift without external calibration |
| Curvature-correction circuit | Compensates second-order thermal effects in bandgap core for flat TC over –40°C to +85°C |
| No external compensation required | Reduces BOM count and PCB area; eliminates capacitor-related aging and ESR instability |
| Supply-current independence | 0.8μA/V VIN sensitivity enables stable power budgeting across wide input voltage range |
| Low-output impedance | 0.12μV/μA load regulation supports direct driving of 10kΩ ADC reference inputs |
Applications
| Hand-Held Equipment | Data Acquisition Systems |
|---|---|
Use Scenario: Portable multimeter with 16-bit sigma-delta ADC requiring stable reference under varying battery voltage and temperature. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion, providing 2.048V reference with minimal drift during field measurements. Use Value: Enables ±0.01% measurement accuracy over –10°C to +50°C ambient without recalibration. | Use Scenario: Industrial 4–20mA loop-powered sensor transmitter with microcontroller and precision ADC. IC Role / Device Role / Timing Role: Reference source for ratiometric current-loop DAC and analog front-end gain calibration. Use Value: Maintains 12-bit linearity over full temperature range using single 2.048V reference shared across signal chain. |
| Industrial Process-Control Systems | Battery-Operated Equipment |
Use Scenario: PLC analog input module measuring thermocouple and RTD signals with cold-junction compensation. IC Role / Device Role / Timing Role: Stable excitation and reference for precision instrumentation amplifiers and ADCs in noisy factory environments. Use Value: Delivers <130ppm temperature hysteresis and 84dB ripple rejection to suppress 50/60Hz mains noise. | Use Scenario: Wireless environmental sensor node powered by CR2032 coin cell, sampling temperature/humidity every 5 minutes. IC Role / Device Role / Timing Role: Low-power reference for ultra-low-quiescent LDO and SAR ADC during active measurement bursts. Use Value: Draws only 35μA continuously, extending battery life beyond 5 years at 10-second wake-up intervals. |
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 output, ±0.1% initial accuracy, 10ppm/°C TC, 4.5μA typical IQ (higher precision, lower IQ) | Requires 1.8V min VIN; not suitable below 1.8V supply; better for ultra-low-power wearables | Select when tighter initial accuracy and lower TC outweigh higher cost and narrower input range |
| REF3020AIDBZR | 2.048V output, ±0.2% initial accuracy, 50ppm/°C TC, 50μA max IQ, SOT23-3 | Higher TC limits use in extended temperature industrial settings; higher IQ reduces battery life | Select for cost-sensitive applications where ±50ppm/°C drift is acceptable and supply >3.0V |
Compared with ADR3420ARJZ-R7 and REF3020AIDBZR, the MAX6021BEUR+T offers optimal balance of industrial-grade temperature stability (≤20ppm/°C), ultra-low dropout (100mV), and proven 2.5V minimum input - making it uniquely suited for battery-powered, wide-temperature embedded systems where both precision and supply flexibility are critical.
Availability
MAX6021BEUR+T is available at Aetrix Electronics and suitable for hand-held equipment, data acquisition systems, and industrial process-control systems requiring stable component supply with guaranteed long-term continuity.
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 family of precision low-power voltage references designed specifically for battery-operated, space-constrained instrumentation and sensor interface applications demanding high accuracy and low quiescent current.
FAQ
What is the output voltage tolerance of the MAX6021BEUR+T over temperature?
The MAX6021BEUR+T has an initial output voltage of 2.048V with ±0.39% accuracy at +25°C. Over the full –40°C to +85°C operating range, its temperature coefficient is ≤20ppm/°C, resulting in a total output variation of less than ±0.5mV relative to nominal - verified per the "box method" in the datasheet. This performance is guaranteed without external trimming.
Does the MAX6021BEUR+T require an external capacitor for stability?
No, the MAX6021BEUR+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 phase margin or oscillation prevention. Adding a capacitor (e.g., 100pF–1nF) may improve transient response in dynamic load conditions but is optional and not needed for basic stability.
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. Its dropout voltage is specified at 100mV (max) at 500μA load, meaning it can deliver 2.048V output with as little as 2.148V input under light loads - however, the guaranteed operational range starts at 2.5V per the Absolute Maximum Ratings and Electrical Characteristics tables.
Can the MAX6021BEUR+T sink and source current simultaneously?
No - the MAX6021BEUR+T operates as a two-quadrant reference: it can either source up to +500μA or sink up to –500μA, but not both simultaneously. Its output stage is designed for unidirectional current flow per application cycle. For bidirectional current handling (e.g., driving push-pull DAC buffers), external op-amp buffering is required.
How does the supply current of the MAX6021BEUR+T vary with input voltage?
The MAX6021BEUR+T exhibits supply-current variation of only 0.8μA/V across its 2.5V–12.6V input range. At +25°C, quiescent current is typically 27μA and max 35μA - nearly constant regardless of VIN. This near-independence simplifies power budgeting in systems with variable supply rails, such as battery-powered devices undergoing voltage sag during discharge.
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:
- 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+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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