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Analog Devices Inc./Maxim Integrated MAX6018BEUR18+T
- Part No.:
- MAX6018BEUR18+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6018BEUR18+T.pdf
- Description:
- IC VREF SERIES 0.4% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:503
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Product details
Overview
MAX6018BEUR18+T from Maxim Integrated is a precision, low-dropout, micropower bandgap voltage reference in a 3-pin SOT23 package. It delivers a stable 1.800V output with ±0.4% initial accuracy, 50ppm/°C max temperature drift, and operates from (VOUT + 200mV) = 2.0V up to 5.5V input. Its 5μA max supply current and 200mV dropout enable reliable operation in end-of-life two-cell alkaline battery monitoring systems.
For engineers reviewing the MAX6018BEUR18+T datasheet, MAX6018BEUR18+T pinout, MAX6018BEUR18+T application, or MAX6018BEUR18+T equivalent, key selection criteria include ultra-low quiescent current, supply-voltage-independent IIN variation (0.1μA/V), load regulation ≤800μV/mA, line regulation ≤275μV/V, and guaranteed capacitive-load stability from 0.1nF to 1000nF.
Technical Context
The MAX6018BEUR18+T is a three-terminal series-mode voltage reference using a BiCMOS bandgap core. It sources or sinks up to ±1mA load current while maintaining output stability across –40°C to +85°C, with thermal hysteresis limited to 130ppm and long-term drift of 100ppm over 1000 hours.
Its dynamic behavior includes 200μs turn-on settling time to 0.1%, 85dB ripple rejection at 120Hz, and noise performance of 45μVp-p (0.1Hz–10Hz) and 160μVRMS (10Hz–10kHz). The device requires ≥100pF output capacitance for stability and supports loads up to 1μF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.800V ±0.4% (B grade) - precise reference for 1.8V rail sensing and ADC/DAC biasing |
| Supply Current | ≤5μA (max) - enables >10-year battery life in low-power sensor nodes |
| Dropout Voltage | ≤200mV at 1mA load - supports operation down to 2.0V input, ideal for aging alkaline cells |
| Temp Drift | ≤50ppm/°C - ensures <±1.8mV error over full –40°C to +85°C range |
| Line Regulation | ≤275μV/V (2.0V–5.5V) - minimal output shift during battery discharge or supply ripple |
| Load Regulation | ≤800μV/mA (0–1mA sourcing) - maintains accuracy under varying sensor or converter loading |
| Noise (0.1–10Hz) | 45μVp-p - low enough for 16-bit+ data acquisition without external filtering |
Pinout & Package
MAX6018BEUR18+T uses a RoHS-compliant 3-pin SOT23-3 package (outline 21-0051, land pattern 90-0179) with standard pin 1–3 orientation and top mark FZJM.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Supply Voltage Input | Accepts 2.0V–5.5V; requires 0.1μF bypass capacitor to GND for PSRR optimization |
| 2 (OUT) | Reference Voltage Output | Delivers regulated 1.800V; must be bypassed with ≥100pF to GND for stability |
| 3 (GND) | Ground Reference | Low-impedance return path; connects directly to system ground plane for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Supply-current independence | IIN varies only 0.1μA/V across input range - eliminates calibration dependency on supply voltage |
| Capacitive-load compatibility | Stable with 0.1nF–1000nF output capacitance - accommodates ceramic, tantalum, or bulk storage caps |
| Low-temperature hysteresis | 130ppm after –40°C/+85°C cycling - preserves calibration integrity in field-deployed equipment |
| Fast turn-on settling | 200μs to 0.1% with 5nF load - enables duty-cycled power management in portable instruments |
| High PSRR | 85dB at 120Hz - rejects AC ripple from switching regulators or noisy battery inputs |
Applications
| Battery Voltage Monitoring | Portable Data Acquisition |
|---|---|
Use Scenario: Real-time measurement of two-cell alkaline battery voltage during deep discharge (down to 2.0V). IC Role / Device Role / Timing Role: Precision 1.8V reference for ADC input scaling and low-battery threshold detection. Use Value: Enables accurate end-of-life prediction with <±1.8mV total error over temperature, extending usable battery life by avoiding premature shutdown. |
Use Scenario: Handheld multimeter or environmental sensor node sampling analog signals at 1kSPS. IC Role / Device Role / Timing Role: Low-noise, low-drift reference for 16-bit SAR ADC conversion. Use Value: Delivers 45μVp-p noise and ≤50ppm/°C drift, supporting effective resolution >15.5 bits without external trimming. |
| Industrial Process Sensor Interface | Low-Power IoT Node Power Management |
Use Scenario: 4–20mA loop-powered transmitter conditioning thermocouple or RTD signals. IC Role / Device Role / Timing Role: Stable excitation and reference source for ratiometric measurements in harsh environments. Use Value: Maintains ±0.4% initial accuracy and 100ppm/1000h long-term stability, reducing field recalibration frequency. |
Use Scenario: Battery-operated BLE/Wi-Fi sensor sending periodic readings every 5 minutes. IC Role / Device Role / Timing Role: Wake-up reference for ADC and microcontroller during active measurement windows. Use Value: Draws only 5μA quiescent current and settles in 200μs, minimizing wake-up energy overhead and maximizing sleep duration. |
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 |
|---|---|---|---|
| REF3018AIDBZR | 1.8V output, ±0.2% initial accuracy, 50ppm/°C drift, 50μA supply current | Higher supply current limits use in sub-10μA battery systems | Select when tighter initial accuracy is required and higher IQ is acceptable |
| ADR3418ARJZ-R7 | 1.8V output, ±0.1% initial accuracy, 30ppm/°C drift, 6μA supply current, 100mV dropout | Slightly lower dropout but 20% higher supply current and different SOT23 pinout (IN/GND/OUT vs. IN/OUT/GND) | Select for improved drift and accuracy where layout allows pinout adaptation and 1μA extra IQ is tolerable |
Compared with MAX6018BEUR18+T, REF3018AIDBZR trades ultra-low IQ for tighter initial accuracy, while ADR3418ARJZ-R7 improves drift and accuracy at the cost of higher quiescent current and non-pin-compatible pin assignment-requiring PCB redesign.
Availability
MAX6018BEUR18+T is available at Aetrix Electronics and suitable for battery voltage monitoring, portable data acquisition, industrial sensor interfaces, and low-power IoT node power management requiring stable component supply across extended production lifecycles.
Supply support for MAX6018BEUR18+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 high-performance analog and mixed-signal ICs for power, sensing, and interface applications, with emphasis on reliability and integration.
The MAX6018 family targets ultra-low-power, precision voltage referencing in space-constrained, battery-dependent systems-specifically engineered for stable operation at near-end-of-life battery voltages with minimal quiescent draw.
FAQ
What is the maximum load current the MAX6018BEUR18+T can source or sink?
The MAX6018BEUR18+T can source up to +1mA and sink up to –1mA while maintaining output regulation within specifications. At 1mA sourcing, dropout remains ≤200mV and load regulation is ≤800μV/mA. Sinking capability supports active pull-down in ratiometric sensor circuits or reference buffering stages where bidirectional current flow is required.
Does the MAX6018BEUR18+T require an external resistor like shunt references?
No, the MAX6018BEUR18+T is a three-terminal series-mode reference and does not require an external current-setting resistor. Unlike two-terminal shunt references, it draws a fixed, ultra-low supply current (<5μA) that is virtually independent of input voltage-eliminating resistor tolerance errors and wasted supply current in battery-sensitive designs.
What output capacitance is required for stability with the MAX6018BEUR18+T?
The MAX6018BEUR18+T requires a minimum output capacitance of 100pF to ensure stability and remains stable with capacitive loads up to 1000nF (1μF). Ceramic capacitors are recommended for low ESR; the device's internal compensation eliminates need for series resistance or specialized capacitor types.
How does the supply current of the MAX6018BEUR18+T vary with input voltage?
The MAX6018BEUR18+T exhibits exceptional supply-voltage independence: its quiescent current varies only 0.1μA per volt across the 2.0V–5.5V input range. This means IIN changes by just 0.35μA from 2.0V to 5.5V, enabling predictable power budgeting regardless of battery state or supply ripple.
Is the MAX6018BEUR18+T pin-compatible with other MAX6018 variants?
Yes, all MAX6018 variants-including MAX6018BEUR18+T-share identical 3-pin SOT23-3 packaging, pinout (IN/OUT/GND), and footprint. Only the output voltage (1.2V/1.6V/1.8V/2.048V) and grade (A/B) differ; no PCB changes are needed when substituting within the same voltage option and package code.
MAX6018BEUR18+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):
- 1.8V
- 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:
- 160µVrms
- Voltage - Input:
- 2V ~ 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
MAX6018BEUR18+T FAQ
1.How can I place an order for MAX6018BEUR18+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6018BEUR18+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 MAX6018BEUR18+T reliable?
The price and inventory of MAX6018BEUR18+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6018BEUR18+T is usually 5 days.
3.What payment methods are accepted for MAX6018BEUR18+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6018BEUR18+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6018BEUR18+T?
MAX6018BEUR18+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6018BEUR18+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 MAX6018BEUR18+T?
For technical support, including MAX6018BEUR18+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6018BEUR18+T requirements.
6.How does Aetrix verify that MAX6018BEUR18+T is sourced from the original manufacturer or authorized distributors?
All MAX6018BEUR18+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 MAX6018BEUR18+T meets industry standards.
7.What is the process for return or replacement of MAX6018BEUR18+T?
All MAX6018BEUR18+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6018BEUR18+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 MAX6018BEUR18+T part is unused and in its original packaging.
Return procedure for MAX6018BEUR18+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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