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Analog Devices Inc./Maxim Integrated MAX6018AEUR18+T
- Part No.:
- MAX6018AEUR18+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6018AEUR18+T.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,920
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Product details
Overview
MAX6018AEUR18+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 ±0.2% output with 50ppm/°C max temperature drift, 200mV dropout at 1mA load, and ultra-low 5μA max supply current. It operates from (VOUT + 200mV) = 2.0V to 5.5V input, enabling use in end-of-life two-cell alkaline battery monitoring systems.
For engineers reviewing the MAX6018AEUR18+T datasheet, MAX6018AEUR18+T pinout, MAX6018AEUR18+T application, or MAX6018AEUR18+T equivalent, key selection criteria include initial accuracy, dropout voltage under load, supply current stability over input voltage, thermal drift performance, and SOT23-3 PCB footprint compatibility.
Technical Context
The MAX6018AEUR18+T is a three-terminal series voltage reference using a BiCMOS bandgap core. Its supply current remains nearly constant across input voltage (0.1μA/V variation), eliminating need for external bias resistors unlike shunt references. It achieves 0.1% settling in 200μs with 5nF output capacitance.
It supports bidirectional load current (±1mA), features 85dB ripple rejection at 120Hz, and maintains stability with capacitive loads from 100pF to 1μF. Dropout voltage is specified at 100–200mV for 1mA sourcing, enabling operation down to 2.0V input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.800V ±0.2% (A grade) - ensures high-precision ADC/DAC biasing without calibration. |
| Temperature Drift | ≤50ppm/°C - limits output error to ≤90μV over –40°C to +85°C operating range. |
| Dropout Voltage | 100–200mV at 1mA load - enables reliable regulation from 2.0V input, critical for aging battery systems. |
| Supply Current | ≤5μA (max) - extends battery life in micropower sensor nodes and portable instrumentation. |
| Line Regulation | ≤275μV/V (2.0V–5.5V) - minimizes output shift during battery voltage sag or supply ripple. |
| Load Regulation | ≤800μV/mA (0–1mA sourcing) - maintains accuracy despite varying load currents in data-acquisition front-ends. |
| Noise (0.1–10Hz) | 45μVP-P - low enough for 16-bit+ precision analog signal chains without additional filtering. |
Pinout & Package
MAX6018AEUR18+T uses a 3-pin SOT23-3 package (outline 21-0051, land pattern 90-0179), RoHS-compliant with "+" suffix. Pin 1 is IN (supply input, bypass with 0.1μF), Pin 2 is OUT (1.8V reference output, bypass ≥100pF), Pin 3 is GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Supply Voltage Input | Accepts 2.0V–5.5V; requires local 0.1μF ceramic bypass to GND for PSRR and transient immunity. |
| 2 (OUT) | Reference Voltage Output | Delivers 1.800V ±0.2%; must be bypassed with ≥100pF to ensure stability; supports ±1mA load. |
| 3 (GND) | Ground Reference | Low-impedance return path; connects directly to system ground plane to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 5μA max supply current enables >10-year battery life in coin-cell-powered IoT sensors. |
| Low Dropout | 200mV dropout at 1mA allows operation from depleted 2×AA batteries (≈2.0V total). |
| Supply-Voltage-Independent Current | 0.1μA/V variation ensures consistent power budget regardless of input rail fluctuations. |
| Capacitive-Load Stability | Stable with 100pF–1μF output capacitance - simplifies layout and accommodates PCB parasitics. |
| High PSRR | 85dB at 120Hz rejects AC ripple from switching regulators or noisy DC/DC converters. |
Applications
| Battery Voltage Monitoring | Portable Data Logger |
|---|---|
|
Use Scenario: Real-time tracking of two-cell alkaline battery voltage during discharge cycle in handheld medical devices. IC Role / Device Role / Timing Role: Precision 1.8V reference for 16-bit SAR ADC measuring battery terminal voltage. Use Value: Enables accurate state-of-charge estimation down to 2.0V input, extending usable battery life by detecting true end-of-life. |
Use Scenario: Low-power environmental sensor node logging temperature/humidity every 5 minutes using coin-cell battery. IC Role / Device Role / Timing Role: Stable 1.8V reference for microcontroller's internal ADC and external analog front-end. Use Value: 5μA quiescent current minimizes standby drain; 50ppm/°C drift ensures measurement consistency across field temperature ranges. |
| Industrial Sensor Transmitter | Calibration Equipment |
|
Use Scenario: 4–20mA loop-powered pressure transmitter operating in harsh factory environments (–40°C to +85°C). IC Role / Device Role / Timing Role: Primary voltage reference for DAC generating precise current-setpoint voltage. Use Value: 0.2% initial accuracy and 50ppm/°C drift meet Class A industrial accuracy requirements without periodic recalibration. |
Use Scenario: Benchtop multimeter reference subsystem requiring traceable, low-drift voltage source. IC Role / Device Role / Timing Role: Secondary reference for self-test and auto-zero functions in high-resolution DMM ASIC. Use Value: 45μVP-P (0.1–10Hz) noise and 100ppm long-term stability support 6½-digit measurement integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3418ARJZ-R7 | 1.8V output, ±0.1% initial accuracy, 30ppm/°C drift, 6μA supply current, SOT23-3. | Higher accuracy and lower drift, but 20% higher supply current; requires tighter layout for noise control. | Select when sub-0.1% absolute accuracy and <30ppm/°C drift are mandatory, and 1μA extra current is acceptable. |
| REF3018AIDBZR | 1.8V output, ±0.2% initial accuracy, 50ppm/°C drift, 45μA supply current, SOT23-3. | Same accuracy/drift specs but 9× higher quiescent current; wider input range (2.2V–5.5V). | Select only if legacy REF30xx design reuse is required; avoid where micropower operation is critical. |
Compared with MAX6018AEUR18+T, ADR3418ARJZ-R7 offers superior accuracy and thermal stability at slightly higher current cost, while REF3018AIDBZR matches initial tolerance but sacrifices micropower capability-making MAX6018AEUR18+T optimal for battery-constrained, high-precision sensing.
Availability
MAX6018AEUR18+T is available at Aetrix Electronics and suitable for battery voltage monitoring, portable data loggers, industrial sensor transmitters, calibration equipment, and precision ADC/DAC biasing requiring stable component supply across extended temperature and lifecycle conditions.
Supply support for MAX6018AEUR18+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 MAX6018 family targets micropower, low-voltage systems requiring high-accuracy voltage references-specifically optimized for battery-operated instrumentation, sensor interfaces, and space-constrained portable electronics.
FAQ
What is the guaranteed initial accuracy of MAX6018AEUR18+T?
The MAX6018AEUR18+T is an A-grade device with guaranteed initial output voltage accuracy of ±0.2% at +25°C, meaning its 1.800V output falls within 1.7964V to 1.8036V before temperature or time effects. This specification is 100% production tested and applies across the full –40°C to +85°C operating range per design guarantee.
Can MAX6018AEUR18+T operate from a single 1.8V supply?
No-MAX6018AEUR18+T requires a minimum input voltage of VOUT + 200mV = 2.0V. It cannot regulate from a nominal 1.8V source. The device is designed for two-cell alkaline (2.0–3.2V) or Li-ion (3.0–4.2V) inputs, not single-cell 1.8V rails. Attempting operation below 2.0V results in unregulated output.
What output capacitor value is required for stability with MAX6018AEUR18+T?
MAX6018AEUR18+T requires a minimum output capacitance of 100pF to ensure stability and remains stable up to 1μF. A 47nF ceramic capacitor is recommended for typical applications to optimize transient response and noise suppression. Values below 100pF may cause oscillation or excessive overshoot during load steps.
How does supply current vary with input voltage for MAX6018AEUR18+T?
MAX6018AEUR18+T exhibits exceptional supply current stability: it varies by only 0.1μA per volt across its 2.0V–5.5V input range. At +25°C, supply current is 3–5μA; over temperature (–40°C to +85°C), it remains ≤6μA. This near-constant current simplifies power budgeting in battery systems independent of voltage sag.
Is MAX6018AEUR18+T pin-compatible with other MAX6018 variants?
Yes-MAX6018AEUR18+T shares identical SOT23-3 pinout (IN, OUT, GND), package dimensions, and thermal characteristics with all MAX6018xURxx+T variants (e.g., MAX6018AEUR12+T, MAX6018BEUR18+T). Only output voltage and initial accuracy differ; no PCB changes are needed when substituting within the same grade and package.
MAX6018AEUR18+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:
- ±0.2%
- 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
MAX6018AEUR18+T FAQ
1.How can I place an order for MAX6018AEUR18+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6018AEUR18+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 MAX6018AEUR18+T reliable?
The price and inventory of MAX6018AEUR18+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6018AEUR18+T is usually 5 days.
3.What payment methods are accepted for MAX6018AEUR18+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6018AEUR18+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6018AEUR18+T?
MAX6018AEUR18+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6018AEUR18+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 MAX6018AEUR18+T?
For technical support, including MAX6018AEUR18+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6018AEUR18+T requirements.
6.How does Aetrix verify that MAX6018AEUR18+T is sourced from the original manufacturer or authorized distributors?
All MAX6018AEUR18+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 MAX6018AEUR18+T meets industry standards.
7.What is the process for return or replacement of MAX6018AEUR18+T?
All MAX6018AEUR18+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6018AEUR18+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 MAX6018AEUR18+T part is unused and in its original packaging.
Return procedure for MAX6018AEUR18+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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