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Analog Devices Inc./Maxim Integrated MAX6520EUR
- Part No.:
- MAX6520EUR
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6520EUR.pdf
- Description:
- VOLTAGE REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:8,402
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Product details
Overview
MAX6520EUR 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 requiring stable low-voltage reference.
For engineers reviewing the MAX6520EUR datasheet, MAX6520EUR pinout, MAX6520EUR application, or MAX6520EUR equivalent, key selection criteria include supply-current stability over input voltage and temperature, output noise (50µVp-p, 0.1Hz–10Hz), load regulation (0.1µV/µA), line regulation (2µV/V), and guaranteed performance across –40°C to +85°C.
Technical Context
The MAX6520EUR is a bandgap-based, three-terminal series voltage reference with internal compensation. Its supply current remains constant (50µA typ, 70µA max) across 2.4V–11V input and –40°C to +85°C, eliminating dependency on VIN or ambient drift.
It delivers 1.2V output with monotonic load regulation (–50µA to +400µA), 400mA short-circuit output capability, and PSRR of 60dB at 1kHz. Output noise is specified as 50µVp-p (0.1Hz–10Hz) and 120µVrms (10Hz–10kHz), supporting high-resolution ADC/DAC biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.2V ±1% (1.176V–1.224V); enables accurate 12-bit+ ADC full-scale calibration at 3V supply. |
| Tempco | ≤50ppm/°C (max); ensures ≤0.6mV drift over –40°C to +85°C, critical for portable metering. |
| Supply Current | 50µA typ / 70µA max; fixed regardless of VIN or temperature-no wasted battery current. |
| Input Range | 2.4V to 11V; supports single-cell Li-ion (3.0–4.2V) and dual-cell alkaline (2.4–3.2V) operation. |
| Load Regulation | 0.1µV/µA; maintains output stability under dynamic DAC or sensor bias current changes. |
| Noise (0.1–10Hz) | 50µVp-p; limits quantization error in 16-bit data acquisition systems. |
| Line Regulation | 2µV/V; rejects ripple and sag in battery-fed supplies without external filtering. |
Pinout & Package
SOT23-3 package: 1.75mm × 2.0mm × 1.1mm body height, gull-wing leads, JEDEC MO-178AA compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input Voltage Supply | Accepts 2.4V–11V; requires 0.1µF ceramic bypass placed adjacent to pin for optimal transient rejection. |
| GND (Pin 3) | Ground Reference | Low-impedance return path; must be connected directly to system ground plane to minimize noise coupling. |
| VOUT (Pin 2) | Precision Output | Delivers regulated 1.2V; supports capacitive loads ≤10nF; no external buffer needed for typical DAC reference inputs. |
Key Features
| Feature | Design Value |
|---|---|
| Supply-current independence | 70µA max over full VIN (2.4V–11V) and temperature (–40°C to +85°C)-enables predictable battery life modeling. |
| Low-output-noise architecture | 50µVp-p (0.1Hz–10Hz) and 120µVrms (10Hz–10kHz)-reduces effective number of bits (ENOB) loss in precision converters. |
| High short-circuit tolerance | 400mA continuous output short-circuit current-survives accidental VOUT-to-GND or VOUT-to-VIN faults. |
| Wide input range with low dropout | Operates down to 2.4V input while regulating 1.2V output-supports aging batteries and low-VIN brownout conditions. |
Applications
| Portable Data Loggers | Handheld Multimeters |
|---|---|
Use Scenario: Battery-powered field instrument logging temperature, pressure, and humidity with 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Provides stable 1.2V reference for ADC VREF input and analog front-end biasing. Use Value: 50ppm/°C tempco and 50µVp-p noise ensure <±0.01% measurement accuracy across operating temperature range. | Use Scenario: 3½-digit handheld DMM using serial DAC for auto-ranging and display driver bias. IC Role / Device Role / Timing Role: Supplies precise 1.2V reference to dual 8-bit DACs (e.g., MAX512/MAX513) generating calibrated test voltages. Use Value: Fixed 70µA supply current simplifies power budgeting; 0.1µV/µA load regulation prevents DAC code-dependent offset errors. |
| Wireless Sensor Nodes | Industrial Loop-Powered Transmitters |
Use Scenario: Sub-100µA IoT node with RF transceiver, microcontroller, and analog sensor interface. IC Role / Device Role / Timing Role: Low-quiescent reference for sensor signal conditioning and ADC reference in energy-harvesting designs. Use Value: 50µA typical supply current minimizes impact on ultra-low-power sleep modes; 2.4V minimum VIN allows operation down to single-cell battery end-of-life. | Use Scenario: 4–20mA loop transmitter with HART modulation, powered from 12–42V loop supply. IC Role / Device Role / Timing Role: Generates isolated 1.2V reference for precision current-sense amplifier and DAC feedback path. Use Value: 11V max VIN rating and 400mA short-circuit capability withstand transient surges and fault conditions in industrial wiring environments. |
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, 120µA supply current, SOT23-3 | Higher accuracy and lower tempco, but 2.4× higher supply current reduces battery life in ultra-low-power use | Select when absolute accuracy > power savings; not drop-in due to higher IQ and different pinout (VIN/VOUT/GND vs. MAX6520EUR's VIN/GND/VOUT) |
| REF3012AIDBZR | 1.2V, ±0.2% initial accuracy, 50ppm/°C max, 50µA supply current, SOT23-3 | Nearly identical tempco and IQ, but ±0.2% accuracy looser than MAX6520EUR's ±1%; same pinout | Valid alternative where ±0.2% initial tolerance is acceptable; shares identical SOT23-3 footprint and pin assignment. |
Compared with ADR3412ARJZ-R7 and REF3012AIDBZR, the MAX6520EUR uniquely balances ±1% accuracy, 50ppm/°C tempco, and 70µA max supply current in a standard SOT23-3 layout-making it optimal for cost-sensitive, long-life battery systems where sub-0.1% accuracy is unnecessary.
Availability
MAX6520EUR is available at Aetrix Electronics and suitable for portable instrumentation, handheld test equipment, and wireless sensor nodes requiring stable component supply with guaranteed lifecycle support through 2028.
Supply support for MAX6520EUR 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 industrial, medical, and communications applications.
The MAX6520EUR belongs to Maxim's ultra-low-power voltage reference product line, engineered specifically for battery-constrained systems needing stable, low-drift references without sacrificing runtime.
FAQ
What is the operating temperature range for the MAX6520EUR?
The MAX6520EUR is rated for operation from –40°C to +85°C. This range is fully specified and production-tested per parametric correlation data. All key parameters-including output voltage accuracy, temperature coefficient, and supply current-are guaranteed across this industrial temperature span. The MAX6520EUR datasheet confirms this range applies to the EUR variant explicitly, with top-mark "EFAA" and SOT23-3 packaging.
Does the MAX6520EUR require an input bypass capacitor?
Yes-the MAX6520EUR benefits from a 0.1µF ceramic capacitor placed directly at the VIN pin to optimize line-transient response. The datasheet specifies this for best performance, especially in battery-powered systems where supply ripple may vary. While the device functions without it, omitting the capacitor degrades PSRR above 1kHz and increases output perturbation during fast input transients. The capacitor must be located as close as possible to the VIN and GND pins.
Can the MAX6520EUR drive a capacitive load?
The MAX6520EUR can drive up to 10nF total output capacitance without instability. This accommodates common decoupling needs-for example, buffering a DAC reference input or supplying a charge reservoir for pulsed analog circuits. Exceeding 10nF risks phase margin degradation and potential oscillation. No series resistor is required; the device is internally compensated for direct capacitive loading within this limit.
What is the short-circuit current rating of the MAX6520EUR?
The MAX6520EUR is rated for continuous short-circuit output current of 400mA-whether shorted to GND or to VIN. This robustness is confirmed in the Absolute Maximum Ratings table and Electrical Characteristics section. It enables reliable operation in fault-prone industrial or test environments where accidental shorts may occur, and eliminates need for external current-limiting protection in most designs.
How does supply current vary with input voltage for the MAX6520EUR?
The MAX6520EUR exhibits near-zero dependence of supply current on input voltage: change is only 1.5µA/V (max) over 2.4V–11V at +25°C, and ≤5µA/V over full temperature range. This flat IQ profile-50µA typ, 70µA max-is a core design feature enabling accurate battery-life estimation in variable-voltage battery systems. Unlike shunt references, no external resistor is needed, and no current is "thrown away."
MAX6520EUR 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):
- 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6520EUR FAQ
1.How can I place an order for MAX6520EUR through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6520EUR 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 reliable?
The price and inventory of MAX6520EUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6520EUR is usually 5 days.
3.What payment methods are accepted for MAX6520EUR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6520EUR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6520EUR?
MAX6520EUR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6520EUR 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?
For technical support, including MAX6520EUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6520EUR requirements.
6.How does Aetrix verify that MAX6520EUR is sourced from the original manufacturer or authorized distributors?
All MAX6520EUR 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 meets industry standards.
7.What is the process for return or replacement of MAX6520EUR?
All MAX6520EUR units undergo pre-shipment inspection (PSI). If there is an issue with MAX6520EUR, 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 part is unused and in its original packaging.
Return procedure for MAX6520EUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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