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Analog Devices Inc./Maxim Integrated MAX6018BEUR12
- Part No.:
- MAX6018BEUR12
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6018BEUR12.pdf
- Description:
- VOLTAGE REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:975
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Product details
Overview
MAX6018BEUR12 from Maxim Integrated is a precision, low-dropout, micropower bandgap voltage reference in a 3-pin SOT23 package, delivering a stable 1.263V output with ±0.4% initial accuracy, 50ppm/°C max temperature drift, and 200mV dropout voltage. It operates from (VOUT + 200mV) to 5.5V input, draws ≤6µA supply current, and supports ±1mA load current - ideal for end-of-life two-cell alkaline battery monitoring and ultra-low-power data-acquisition systems.
For engineers reviewing the MAX6018BEUR12 datasheet, MAX6018BEUR12 pinout, MAX6018BEUR12 application, or MAX6018BEUR12 equivalent, key selection criteria include its guaranteed 1.263V output tolerance, supply-voltage-independent quiescent current (0.1µA/V variation), 700µV/mA load regulation, 250µV/V line regulation, and compatibility with capacitive loads from 100pF to 1µF.
Technical Context
The MAX6018BEUR12 is a three-terminal series-mode voltage reference using BiCMOS bandgap architecture, enabling operation down to VOUT + 200mV input while maintaining tight output stability. Its supply current remains virtually constant across input voltage (3–6µA over full temp range), eliminating external biasing resistors required by shunt references.
It features internal compensation for capacitive loads up to 1µF, achieves 0.1% settling in 200µs with 5nF output capacitance, and provides 85dB ripple rejection at 120Hz - critical for ADC reference and battery-fuel-gauge applications where supply noise and thermal drift directly impact measurement fidelity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.263V ±0.4% (max deviation = ±5.05mV at +25°C) |
| Initial Accuracy | ±0.4% (B grade), enabling 12-bit ADC reference without calibration |
| Temperature Drift | ≤50ppm/°C (max), contributing ≤630ppm error over –40°C to +85°C) |
| Dropout Voltage | 200mV max at 1mA load, allowing operation from 1.463V input |
| Supply Current | ≤6µA over full temperature range, varying only 0.1µA/V with VIN |
| Load Regulation | 700µV/mA max (0–1mA sourcing), ensuring <0.06% output shift under full load |
| Line Regulation | 250µV/V max (1.8V–5.5V input), limiting input-induced error to <0.02% over full range |
Pinout & Package
MAX6018BEUR12 uses a 3-pin SOT23 package (JEDEC MO-178AA), with 1.3mm × 2.9mm footprint and 1.0mm height. Pin 1 is IN (supply input), Pin 2 is OUT (1.263V reference output), and Pin 3 is GND (ground). A 0.1µF bypass capacitor is recommended from IN to GND; ≥100pF is required from OUT to GND for stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Supply voltage input | Accepts 1.463V–5.5V; requires 0.1µF ceramic bypass to GND for PSRR optimization |
| 2 (OUT) | Precision reference output | Delivers 1.263V ±0.4%; must be bypassed with ≥100pF to GND for stability |
| 3 (GND) | Analog ground reference | Common return for IN and OUT; must be low-impedance path to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | ≤6µA over –40°C to +85°C, enabling >10-year battery life in coin-cell systems |
| Low dropout operation | 200mV max dropout enables use with aging two-cell alkaline (down to ~1.46V) |
| Capacitive-load stability | Stable with 100pF–1µF output capacitance, simplifying layout in noisy environments |
| Supply-voltage-independent IQ | 0.1µA/V variation ensures consistent power budget regardless of battery voltage decay |
| High PSRR | 85dB at 120Hz rejects AC ripple from switching regulators or rectified supplies |
Applications
| Battery Fuel Gauging | Data-Acquisition Reference |
|---|---|
Use Scenario: Monitoring voltage decay in two-cell alkaline or Li-MnO₂ primary batteries to estimate remaining capacity. IC Role / Device Role / Timing Role: Precision voltage reference for ADC conversion of battery terminal voltage. Use Value: 1.263V output with ±0.4% accuracy and 50ppm/°C drift enables <1% state-of-charge error over full temperature and discharge range. | Use Scenario: Providing stable reference for 12-bit SAR ADCs in portable instrumentation and sensor nodes. IC Role / Device Role / Timing Role: Low-noise, low-drift analog reference source for high-resolution analog-to-digital conversion. Use Value: 700µV/mA load regulation and 250µV/V line regulation ensure reference stability despite varying sensor excitation or digital load currents. |
| Industrial Sensor Transmitters | Low-Power Microcontroller Supervision |
Use Scenario: Biasing precision current loops (e.g., 4–20mA transmitters) in process-control field devices powered by 3.3V or 5V rails. IC Role / Device Role / Timing Role: Stable excitation reference for RTD or bridge sensor conditioning circuits. Use Value: 200mV dropout allows direct use from 3.3V rail with margin for PCB trace drop; 85dB PSRR suppresses switching noise from nearby DC/DC converters. | Use Scenario: Supplying reset threshold reference for brown-out detection in battery-powered MCU systems. IC Role / Device Role / Timing Role: Low-power, accurate voltage monitor input for supervisor ICs or internal MCU bandgap comparators. Use Value: 1.263V output matches common 1.2V or 1.25V reset thresholds; 6µA supply current minimizes standby power overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6029BEUR12 | Same 1.263V output, ±0.4% accuracy, but higher 10µA max supply current and 30ppm/°C drift | Higher drift and current reduce battery lifetime in long-term monitoring; better for cost-sensitive industrial apps with wider temp tolerance | Select MAX6029BEUR12 only if lower drift is not required and board space allows same SOT23-3 footprint |
| ADR3412BRJZ-R7 | 1.2V output (not 1.263V), ±0.1% initial accuracy, 30ppm/°C drift, 12µA supply current, same SOT23-3 package | 1.2V vs. 1.263V output requires ADC gain recalibration; tighter accuracy trades off higher current and cost | Choose ADR3412BRJZ-R7 when absolute 1.2V is mandated and 12µA supply is acceptable |
Compared with MAX6018BEUR12, MAX6029BEUR12 offers lower drift but higher supply current, while ADR3412BRJZ-R7 delivers superior accuracy and drift at the cost of 2× supply current and a 0.063V output offset - making MAX6018BEUR12 optimal for battery-critical 1.263V reference needs.
Availability
MAX6018BEUR12 is available at Aetrix Electronics and suitable for battery-fuel-gauging, portable data-acquisition, and low-power microcontroller supervision requiring stable component supply, long-lifecycle assurance, and guaranteed parametric compliance to Maxim's production specifications.
Supply support for MAX6018BEUR12 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, communications, and consumer applications.
The MAX6018 family was engineered specifically for ultra-low-power, low-voltage reference applications in battery-operated systems - emphasizing micropower operation, minimal dropout, and robust capacitive-load stability in miniature SOT23 packaging.
FAQ
What is the guaranteed output voltage tolerance for MAX6018BEUR12 over temperature?
The MAX6018BEUR12 guarantees an output voltage of 1.263V with ±0.4% initial accuracy at +25°C and ≤50ppm/°C temperature drift over –40°C to +85°C. This results in a total output variation of ≤±0.63% across the full operating range, confirmed by production testing and design guarantee per Maxim's datasheet Section "ELECTRICAL CHARACTERISTICS (MAX6018_12–1.263V)".
Does MAX6018BEUR12 require an external resistor for operation?
No, MAX6018BEUR12 does not require an external resistor. As a three-terminal series-mode voltage reference, it operates with a fixed supply current (≤6µA) that is virtually independent of input voltage - unlike two-terminal shunt references that mandate external current-setting resistors. This eliminates resistor tolerance errors and simplifies PCB layout.
What is the minimum input voltage required for MAX6018BEUR12 to maintain regulation?
The minimum input voltage for MAX6018BEUR12 is VOUT + 200mV = 1.463V. Below this, the device exits regulation and output voltage drops nonlinearly. This 200mV dropout enables reliable operation even with deeply discharged two-cell alkaline batteries (~1.5V total).
Can MAX6018BEUR12 drive a 1µF output capacitor?
Yes, MAX6018BEUR12 is stable with output capacitance from 100pF up to 1µF, as specified in the "Capacitive-Load Stability Range" parameter (47nF to 1000nF typical, 1µF validated). Using ≥100pF is mandatory for stability; larger values improve transient response but do not compromise stability.
How does supply current vary with temperature for MAX6018BEUR12?
MAX6018BEUR12 draws 3–6µA supply current over –40°C to +85°C, with typical values of 3–5µA at +25°C. The variation is monotonic and bounded - no increase beyond 6µA occurs across temperature or input voltage, ensuring predictable power budgeting in battery systems.
MAX6018BEUR12 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):
- 1.263V
- Voltage - Output (Max):
- -
- Current - Output:
- 1 mA
- Tolerance:
- ±0.4%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- 45µVp-p
- Noise - 10Hz to 10kHz:
- 100µVrms
- Voltage - Input:
- 1.8V ~ 5.5V
- Current - Supply:
- 6µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6018BEUR12 FAQ
1.How can I place an order for MAX6018BEUR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6018BEUR12 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 MAX6018BEUR12 reliable?
The price and inventory of MAX6018BEUR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6018BEUR12 is usually 5 days.
3.What payment methods are accepted for MAX6018BEUR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6018BEUR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6018BEUR12?
MAX6018BEUR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6018BEUR12 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 MAX6018BEUR12?
For technical support, including MAX6018BEUR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6018BEUR12 requirements.
6.How does Aetrix verify that MAX6018BEUR12 is sourced from the original manufacturer or authorized distributors?
All MAX6018BEUR12 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 MAX6018BEUR12 meets industry standards.
7.What is the process for return or replacement of MAX6018BEUR12?
All MAX6018BEUR12 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6018BEUR12, 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 MAX6018BEUR12 part is unused and in its original packaging.
Return procedure for MAX6018BEUR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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