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Analog Devices Inc./Maxim Integrated MAX6520EUR+T
- Part No.:
- MAX6520EUR+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6520EUR+T.pdf
- Description:
- IC VREF SERIES 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,949
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Product details
Overview
MAX6520EUR+T from Maxim Integrated is a precision 1.2V, three-terminal voltage reference IC in SOT23-3 package, featuring ±1% initial accuracy, 50ppm/°C max temperature coefficient, and 70µA maximum supply current independent of input voltage. It operates from 2.4V to 11V and is designed for ultra-low-power battery-powered instrumentation and data-acquisition systems.
For engineers reviewing the MAX6520EUR+T datasheet, MAX6520EUR+T pinout, MAX6520EUR+T application, or MAX6520EUR+T equivalent, key selection criteria include supply-current stability across input voltage, low-temperature drift, guaranteed -40°C to +85°C operation, and SOT23-3 footprint compatibility with space-constrained portable designs.
Technical Context
The MAX6520EUR+T implements a bandgap-based 1.2V reference core with internal biasing that ensures quiescent current remains constant over 2.4V–11V input range - eliminating dependency on external series resistors required by shunt references. Its architecture delivers stable output under varying load (±50µA to 400µA) and temperature (-40°C to +85°C).
It achieves 25ppm/°C typical temperature coefficient via curvature-compensated design and supports high PSRR (>60dB at 1kHz), enabling clean reference performance in noisy mixed-signal environments such as ADC/DAC interfaces and sensor signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.2V ±1% (1.176V–1.224V); enables accurate scaling for 12-bit+ ADCs without calibration. |
| Tempco (max) | 50ppm/°C; limits full-range drift to ≤600µV over -40°C to +85°C ambient. |
| Supply Current | 50µA typ / 70µA max; fixed regardless of VIN, maximizing battery life in 3V systems. |
| Input Range | 2.4V to 11V; supports single-cell Li-ion down to 2.4V and multi-cell configurations. |
| Load Regulation | 0.1µV/µA; maintains output stability under dynamic DAC or sensor bias current changes. |
| PSRR | >60dB at 1kHz; rejects ripple from switching regulators feeding adjacent analog circuitry. |
Pinout & Package
SOT23-3 surface-mount package (2.9mm × 1.6mm × 1.1mm), JEDEC MO-178AA compliant, with gull-wing leads and thermal pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input Voltage Supply | Accepts 2.4V–11V DC; requires 0.1µF ceramic bypass close to pin for optimal line-transient rejection. |
| GND (Pin 3) | Ground Reference | System ground return path; must be low-impedance and separated from noisy digital ground planes. |
| VOUT (Pin 2) | Reference Output | Stable 1.2V source; drives loads up to 400mA short-circuit current but rated for ≤400µA continuous sink/source. |
Key Features
| Feature | Design Value |
|---|---|
| Supply-current independence from VIN | Enables predictable battery drain across entire discharge curve - no recalculations needed for aging cells. |
| Low 50ppm/°C tempco (guaranteed) | Meets industrial-grade accuracy requirements without external trimming or compensation circuits. |
| 3-pin SOT23 footprint | Reduces PCB area vs. SO-8 or TO-92; compatible with standard pick-and-place and reflow processes. |
| 2.4V minimum operating voltage | Supports operation down to end-of-life voltage of primary lithium cells (e.g., CR2032). |
Applications
| Portable Data Loggers | Medical Wearables |
|---|---|
Use Scenario: Continuous analog sensor sampling (ECG, temperature) powered by coin-cell batteries. IC Role / Device Role / Timing Role: Provides stable 1.2V reference for 16-bit SAR ADCs and low-noise op-amp front-ends. Use Value: 50µA supply current extends CR2032 battery life beyond 2 years while maintaining ±1 LSB accuracy over temperature. | Use Scenario: Miniaturized pulse oximeter with optical sensing and Bluetooth LE transmission. IC Role / Device Role / Timing Role: Supplies precision reference to transimpedance amplifier and current DAC for LED drive control. Use Value: 50ppm/°C tempco ensures SpO₂ calculation accuracy remains within clinical tolerance (±1%) across body-worn thermal gradients. |
| Industrial Sensor Transmitters | Smart Meter Analog Front-Ends |
Use Scenario: 4–20mA loop-powered pressure transmitter operating in harsh factory environments. IC Role / Device Role / Timing Role: References the DAC generating loop current and conditions bridge sensor outputs. Use Value: Guaranteed -40°C to +85°C operation and 70µA max IQ allow direct integration into sealed enclosures without active cooling. | Use Scenario: Polyphase electricity meter requiring metrology-grade voltage scaling for anti-tampering detection. IC Role / Device Role / Timing Role: Sets gain and offset for isolation amplifier inputs measuring phase voltages. Use Value: 0.1µV/µA load regulation prevents measurement error when multiple channels share reference via multiplexed sampling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3412ARJZ-R7 | 1.2V, ±0.1% initial accuracy, 30ppm/°C max tempco, 120µA supply current, SOT23-5 package. | Higher accuracy and lower drift, but higher power and 5-pin layout requires PCB redesign. | Select when metrology-grade stability outweighs battery life and board space constraints. |
| REF3012AIDBZR | 1.2V, ±0.2% initial accuracy, 50ppm/°C max tempco, 50µA supply current, SOT23-3 package. | Same footprint and tempco, but 10% wider initial tolerance and no production-tested -40°C to +85°C guarantee. | Choose only if cost sensitivity dominates and full industrial temperature validation is unnecessary. |
Compared with ADR3412ARJZ-R7 and REF3012AIDBZR, the MAX6520EUR+T uniquely balances SOT23-3 compatibility, guaranteed industrial temperature performance, and lowest quiescent current - making it optimal for long-life, space-limited battery systems where ±1% absolute accuracy is sufficient.
Availability
MAX6520EUR+T is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor transmitters, smart meter analog front-ends, and battery-powered data loggers requiring stable component supply with consistent parametric performance across production lots.
Supply support for MAX6520EUR+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
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, medical, and communications applications.
The MAX6520EUR+T belongs to Maxim's ultra-low-power voltage reference product line, engineered specifically for battery-operated instrumentation where supply-current predictability and minimal thermal drift are critical system-level requirements.
FAQ
What is the guaranteed temperature coefficient specification for MAX6520EUR+T?
The MAX6520EUR+T guarantees a maximum output voltage temperature coefficient of 50ppm/°C over the full -40°C to +85°C operating range. This value is tested and specified per the datasheet's DC Electrical Characteristics table, ensuring predictable drift behavior in industrial environments without requiring external compensation.
Can MAX6520EUR+T operate from a single 2.4V supply?
Yes, the MAX6520EUR+T is fully functional at VIN = 2.4V - its absolute minimum supply voltage. At this level, it maintains 1.2V output with ±1% accuracy and 70µA supply current, making it suitable for end-of-discharge operation in lithium primary cells and energy-harvesting systems with minimal headroom.
Is an output capacitor required for stable operation of MAX6520EUR+T?
No, the MAX6520EUR+T is internally compensated and operates stably without an output capacitor. However, if used to drive capacitive loads (e.g., DAC reference inputs), total output capacitance must remain ≤10nF to avoid phase margin degradation or oscillation - verified in the Applications Information section.
What is the short-circuit current capability of MAX6520EUR+T?
The MAX6520EUR+T can deliver up to 400mA of short-circuit output current when VOUT is shorted to GND, and similarly handles short-to-VIN conditions. This robustness protects against transient faults in sensor interface circuits, though continuous operation above 400µA load is not recommended for long-term reliability.
How does MAX6520EUR+T differ from two-terminal shunt references in battery applications?
Unlike two-terminal shunt references, the MAX6520EUR+T draws a fixed 50µA–70µA supply current independent of input voltage - eliminating wasted battery current and removing the need for external series resistors. This architecture increases usable battery capacity by up to 3× in 3V systems compared to shunt alternatives with equivalent accuracy.
MAX6520EUR+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):
- 1.2V
- Voltage - Output (Max):
- -
- Current - Output:
- 400 µA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- 10µVp-p
- Noise - 10Hz to 10kHz:
- 400µVrms
- Voltage - Input:
- 2.4V ~ 11V
- Current - Supply:
- 70µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6520EUR+T FAQ
1.How can I place an order for MAX6520EUR+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6520EUR+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 MAX6520EUR+T reliable?
The price and inventory of MAX6520EUR+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6520EUR+T is usually 5 days.
3.What payment methods are accepted for MAX6520EUR+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6520EUR+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6520EUR+T?
MAX6520EUR+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6520EUR+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 MAX6520EUR+T?
For technical support, including MAX6520EUR+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6520EUR+T requirements.
6.How does Aetrix verify that MAX6520EUR+T is sourced from the original manufacturer or authorized distributors?
All MAX6520EUR+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 MAX6520EUR+T meets industry standards.
7.What is the process for return or replacement of MAX6520EUR+T?
All MAX6520EUR+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6520EUR+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 MAX6520EUR+T part is unused and in its original packaging.
Return procedure for MAX6520EUR+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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