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Analog Devices Inc./Maxim Integrated MAX6018BEUR12-T
- Part No.:
- MAX6018BEUR12-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6018BEUR12-T.pdf
- Description:
- VOLTAGE REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:4,791
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Product details
Overview
MAX6018BEUR12-T 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.
For engineers reviewing the MAX6018BEUR12-T datasheet, MAX6018BEUR12-T pinout, MAX6018BEUR12-T application, or MAX6018BEUR12-T equivalent, this page delivers verified electrical specs, real-world design meaning for line/load regulation and noise, SOT23 terminal roles, and validated alternative options for battery-powered precision analog systems.
Technical Context
The MAX6018BEUR12-T is a three-terminal series voltage reference using BiCMOS bandgap architecture. Its supply current remains stable across input voltage (0.1µA/V variation), eliminating external bias resistors required by shunt references. It achieves 0.1% settling in 200µs with 5nF output capacitance and maintains stability from 100pF to 1µF load capacitance.
It features active internal compensation and operates down to 1.463V input (1.263V + 200mV), enabling use in deeply discharged battery systems. Output voltage is trimmed at wafer level for ±0.4% initial accuracy (B grade), with guaranteed long-term stability of 100ppm over 1000 hours and thermal hysteresis of 130ppm.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.263V ±0.4% (±5.05mV) - enables accurate ADC/DAC biasing in 1.8V–3.3V systems without trimming. |
| Initial Accuracy | ±0.4% (B grade) - reduces calibration burden in portable medical sensors and handheld meters. |
| Temperature Drift | ≤50ppm/°C - contributes ≤63µV error over –40°C to +85°C, critical for industrial sensor front-ends. |
| Dropout Voltage | 200mV at 1mA load - allows operation down to 1.463V input, supporting two-cell alkaline batteries at end-of-life (~0.73V/cell). |
| Supply Current | ≤6µA over full temperature range - extends battery life beyond 10 years in 250mAh coin-cell applications. |
| Line Regulation | ≤400µV/V - introduces <0.4mV shift across 1.8V–5.5V input, essential for stable reference in variable-supply IoT nodes. |
| Noise (10Hz–10kHz) | 100µVRMS - ensures <1 LSB error in 12-bit 1.263V full-scale ADC conversions. |
Pinout & Package
MAX6018BEUR12-T uses a 3-pin SOT23 package (JEDEC MO-178AA), with 1.3mm × 0.8mm footprint and 1.0mm height. Pin 1 (IN) accepts input from 1.463V to 5.5V; Pin 2 (OUT) delivers regulated 1.263V; Pin 3 (GND) provides reference ground return. A 0.1µF bypass capacitor is recommended on IN; ≥100pF is required on OUT 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 and turn-on reliability. |
| 2 - OUT | Reference voltage output | Delivers 1.263V ±0.4%; must be loaded with ≥100pF capacitance to ensure stability under all operating conditions. |
| 3 - GND | Ground reference terminal | Low-impedance return path for both supply and load currents; must connect directly to system analog ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | ≤6µA over –40°C to +85°C - enables >10-year battery life in always-on environmental monitors. |
| Supply-voltage-independent IQ | 0.1µA/V variation - eliminates input-rail dependency, simplifying power supply design in multi-rail systems. |
| Low dropout operation | 200mV at 1mA - supports direct regulation from single Li-ion or two alkaline cells without boost circuitry. |
| Capacitive-load stability | Stable with 100pF–1µF output capacitance - accommodates layout parasitics and EMI filtering without oscillation. |
| Turn-on settling time | 200µs to 0.1% with 5nF COUT - meets timing requirements for fast-sampling portable data loggers. |
Applications
| Battery Voltage Monitoring | Portable Medical Sensors |
|---|---|
|
Use Scenario: Real-time tracking of two-cell alkaline battery voltage during discharge, down to 1.4V total. IC Role / Device Role / Timing Role: Precision voltage reference for ADC input scaling in microcontroller-based fuel gauging. Use Value: Enables accurate state-of-charge estimation below 0.75V/cell by maintaining 1.263V reference integrity at 1.463V input. |
Use Scenario: Powering analog front-end of wearable ECG patch with 200-hour battery life. IC Role / Device Role / Timing Role: Stable excitation reference for instrumentation amplifier gain-setting and ADC reference rail. Use Value: 100µVRMS noise and 50ppm/°C drift ensure <1µV baseline drift over body-temperature range (32–42°C). |
| Industrial Data Acquisition | Smart Meter Sensor Interface |
|
Use Scenario: 12-bit SAR ADC reference in DIN-rail mounted temperature transmitter (-40°C to +85°C). IC Role / Device Role / Timing Role: Low-drift, low-noise reference source for ratiometric sensor measurements. Use Value: ±0.4% initial accuracy and 100ppm long-term stability reduce annual recalibration frequency in field-deployed units. |
Use Scenario: Reference for current-sense amplifier and metrology ADC in Class 0.5 electricity meter. IC Role / Device Role / Timing Role: Primary voltage reference for precision analog signal chain under varying supply conditions. Use Value: 400µV/V line regulation ensures <0.5mV reference shift across 2.4–3.6V battery-backed supply, meeting IEC 62053 accuracy class. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision micropower voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6012BEUR12-T | Same 1.263V output, ±0.4% accuracy, but higher 10µA max supply current and 100ppm/°C drift. | Limited to less demanding industrial environments where 50ppm/°C drift is not required. | Select when cost sensitivity outweighs ultra-low drift and current; not suitable for battery lifetime-critical designs. |
| ADR3412BRJZ-R7 | 1.200V output (not 1.263V), ±0.1% initial accuracy, 30ppm/°C drift, 4.5µA max IQ, but requires minimum 1.8V input. | Cannot operate below 1.8V input - excludes end-of-life two-cell alkaline use cases supported by MAX6018BEUR12-T. | Choose only if system supply stays ≥1.8V and tighter initial accuracy justifies 1.200V vs. 1.263V reference scaling. |
Compared with MAX6012BEUR12-T and ADR3412BRJZ-R7, the MAX6018BEUR12-T uniquely combines 1.263V output, 200mV dropout, and 50ppm/°C drift in a 3-pin SOT23 - making it the only option that sustains precision reference performance across the full discharge curve of two alkaline cells.
Availability
MAX6018BEUR12-T is available at Aetrix Electronics and suitable for battery voltage monitoring, portable medical sensors, industrial data acquisition, smart meter sensor interfaces, and low-power IoT edge nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6018BEUR12-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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX6018 family was designed specifically for ultra-low-power, high-accuracy voltage reference needs in space-constrained, battery-operated systems - emphasizing micropower consumption, low dropout, and SOT23 integration without external components.
FAQ
What is the exact output voltage tolerance of the MAX6018BEUR12-T over temperature?
The MAX6018BEUR12-T delivers 1.263V output with ±0.4% initial accuracy at +25°C and guaranteed maximum temperature coefficient of 50ppm/°C over –40°C to +85°C. This results in a worst-case total error of ±0.4% + (125°C × 50ppm/°C) = ±1.025%, or ±13.0mV absolute deviation from nominal, confirmed in the device's production-tested electrical characteristics table.
Can the MAX6018BEUR12-T operate from a single 1.5V alkaline cell?
No - the MAX6018BEUR12-T requires minimum input voltage of VOUT + 200mV = 1.463V. A fresh 1.5V alkaline cell meets this, but its voltage drops rapidly under load and falls below 1.463V within minutes. The device is intended for two-cell alkaline stacks (2.0–3.0V nominal), which sustain ≥1.463V through most of their discharge cycle.
What is the recommended output capacitor for stable operation of the MAX6018BEUR12-T?
The MAX6018BEUR12-T requires a minimum 100pF ceramic capacitor from OUT to GND for stability and remains stable up to 1µF. A 47nF X7R capacitor is used in typical application circuits; values between 100pF and 1µF allow trade-offs between transient response speed and noise filtering without risking oscillation.
How does the supply current of the MAX6018BEUR12-T vary with input voltage?
The MAX6018BEUR12-T exhibits supply current variation of only 0.1µA/V across its input range (1.463V to 5.5V), confirmed in the Electrical Characteristics table under "Change in Quiescent Supply Current vs. Input Voltage." At +25°C, IIN is 3–5µA; over –40°C to +85°C, it remains ≤6µA - making it highly predictable for battery-life modeling.
Is the MAX6018BEUR12-T pin-compatible with other MAX6018 variants like MAX6018AEUR12-T?
Yes - all MAX6018 variants, including MAX6018BEUR12-T and MAX6018AEUR12-T, share identical 3-pin SOT23 pinout (IN, OUT, GND), same package dimensions, and compatible PCB footprint. The only differences are initial accuracy (±0.4% vs. ±0.2%) and top-mark codes (FZJI vs. FZJH); no layout changes are needed when substituting between A and B grades.
MAX6018BEUR12-T 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-T FAQ
1.How can I place an order for MAX6018BEUR12-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6018BEUR12-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 MAX6018BEUR12-T reliable?
The price and inventory of MAX6018BEUR12-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6018BEUR12-T is usually 5 days.
3.What payment methods are accepted for MAX6018BEUR12-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6018BEUR12-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6018BEUR12-T?
MAX6018BEUR12-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6018BEUR12-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 MAX6018BEUR12-T?
For technical support, including MAX6018BEUR12-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6018BEUR12-T requirements.
6.How does Aetrix verify that MAX6018BEUR12-T is sourced from the original manufacturer or authorized distributors?
All MAX6018BEUR12-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 MAX6018BEUR12-T meets industry standards.
7.What is the process for return or replacement of MAX6018BEUR12-T?
All MAX6018BEUR12-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6018BEUR12-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 MAX6018BEUR12-T part is unused and in its original packaging.
Return procedure for MAX6018BEUR12-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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