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Analog Devices Inc./Maxim Integrated MAX6018AEUR21+T
- Part No.:
- MAX6018AEUR21+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6018AEUR21+T.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,291
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Product details
Overview
The MAX6018AEUR21+T from Maxim Integrated is a precision, low-dropout, micropower bandgap voltage reference in a 3-pin SOT23 package, delivering a stable 2.048V output with ±0.2% initial accuracy and 50ppm/°C max temperature drift. It operates from (VOUT + 200mV) to 5.5V input, sources/sinks up to 1mA load current, and draws only 5μA max supply current - ideal for two-cell alkaline battery monitoring and low-power data-acquisition systems.
For engineers reviewing the MAX6018AEUR21+T datasheet, MAX6018AEUR21+T pinout, MAX6018AEUR21+T application, or MAX6018AEUR21+T equivalent, key selection criteria include its 200mV dropout voltage, supply-current independence from VIN (0.1μA/V variation), 1000nF capacitive-load stability, and guaranteed performance across –40°C to +85°C.
Technical Context
The MAX6018AEUR21+T implements a three-terminal series voltage reference architecture using BiCMOS bandgap core technology, enabling precise regulation without external resistors. Its internal design ensures load regulation of ≤1000μV/mA (0–1mA sourcing) and line regulation of ≤330μV/V over 2.25V–5.5V input range.
It features built-in thermal hysteresis compensation (≤130ppm), long-term stability of ≤100ppm over 1000 hours, and ripple rejection of 85dB at 120Hz - all verified across industrial temperature range with no external components required for basic operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048V ±0.2% (max deviation ±4.1mV at +25°C) |
| Dropout Voltage | 200mV max at 1mA load - enables operation from 2.25V input in battery-depleted conditions |
| Supply Current | 5μA max over full temperature range - enables >10-year battery life in µA-level systems |
| Temp Drift | 50ppm/°C max - adds ≤0.41mV error over –40°C to +85°C span |
| Load Regulation | 1000μV/mA max - maintains output stability under varying sensor or ADC bias loads |
| Line Regulation | 330μV/V max - limits output shift to ≤0.74mV across full 2.25V–5.5V input range |
| Noise (0.1–10Hz) | 50μVP-P - supports high-resolution 16-bit+ SAR ADC references |
Pinout & Package
MAX6018AEUR21+T uses a RoHS-compliant 3-pin SOT23-3 package (outline 21-0051, land pattern 90-0179) with standard pin 1–3 orientation and 0.95mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Supply Voltage Input | Accepts 2.25V–5.5V; requires 0.1µF bypass capacitor to GND for PSRR optimization |
| 2 (OUT) | Reference Voltage Output | Delivers 2.048V; stable with 100pF–1µF capacitive load; connects directly to ADC REF or sensor bias |
| 3 (GND) | Analog Ground Reference | Must be low-impedance return path; separate from digital ground in mixed-signal layouts |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 5μA max across –40°C to +85°C - eliminates need for shutdown control in always-on sensors |
| Supply-voltage-independent IQ | 0.1μA/V variation - removes VIN dependency in battery-powered systems with decaying voltage |
| Capacitive-load stability | Stable with 100pF–1000nF output capacitance - accommodates layout parasitics and filtering needs |
| Low thermal hysteresis | 130ppm max - ensures repeatable voltage after thermal cycling in outdoor or industrial environments |
| High PSRR | 85dB at 120Hz - rejects ripple from switching regulators or AC adapters feeding the reference |
Applications
| Battery Monitoring System | Data Acquisition Front-End |
|---|---|
Use Scenario: Real-time monitoring of two-cell alkaline battery voltage during end-of-life discharge. IC Role / Device Role / Timing Role: Precision 2.048V reference for 12-bit ADC measuring cell voltage with <±1 LSB error. Use Value: Enables accurate state-of-charge estimation down to 1.8V input while consuming <5μA - extending usable battery life by months. | Use Scenario: High-accuracy analog signal conditioning in portable environmental sensor nodes. IC Role / Device Role / Timing Role: Stable reference for low-noise instrumentation amplifier and SAR ADC sampling thermistor or gas sensor outputs. Use Value: 50μVP-P low-frequency noise and 50ppm/°C drift ensure <0.01% measurement error across operating temperature range. |
| Hand-Held Medical Device | Industrial Process Controller |
Use Scenario: Powering precision analog front-end in battery-operated pulse oximeter. IC Role / Device Role / Timing Role: Low-drift reference for transimpedance amplifier converting photodiode current to voltage. Use Value: 200mV dropout allows operation through full battery discharge curve (3.0V → 1.8V), maintaining signal integrity without brownout resets. | Use Scenario: Calibration reference in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Primary voltage reference for 16-bit DACs and multiplexed ADC channels in harsh industrial environments. Use Value: Guaranteed –40°C to +85°C operation with 100ppm/1000hr long-term stability meets IEC 61000-6-2 immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3020AIDBZR | 2.048V output, ±0.2% initial accuracy, but higher 50μA max supply current and 350ppm/°C max drift | Less suitable for ultra-low-power battery systems; better for cost-sensitive industrial designs with wider temp tolerance | Select when lower cost outweighs micropower requirement and drift budget allows ≥350ppm/°C |
| ADR3420ARJZ-R7 | 2.048V output, ±0.1% initial accuracy, 4.5μA max supply current, but requires ≥2.5V input (higher dropout) | Incompatible with sub-2.5V battery operation; preferred where tighter initial accuracy justifies input voltage margin loss | Select only if system VIN remains ≥2.5V throughout lifetime and ±0.1% initial accuracy is mandatory |
Compared with REF3020AIDBZR and ADR3420ARJZ-R7, the MAX6018AEUR21+T uniquely combines 2.048V output, ±0.2% accuracy, 5μA max IQ, and 200mV dropout - making it the sole option supporting reliable operation from 2.25V inputs in space-constrained SOT23 packages.
Availability
MAX6018AEUR21+T is available at Aetrix Electronics and suitable for battery monitoring systems, portable medical devices, handheld test equipment, and industrial data loggers requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6018AEUR21+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 is a semiconductor company specializing in analog and mixed-signal ICs for power, sensing, interface, and communication applications.
The MAX6018 family was designed specifically for ultra-low-power, high-accuracy voltage referencing in space-constrained, battery-operated systems - emphasizing micropower consumption, low dropout, and SOT23 integration.
FAQ
What is the minimum input voltage required for stable operation of the MAX6018AEUR21+T?
The MAX6018AEUR21+T requires a minimum input voltage of VOUT + 200mV = 2.248V, specified as 2.25V in the datasheet. This low dropout enables reliable operation even as two-cell alkaline batteries deplete to ~1.125V per cell. Operation below 2.25V may cause output regulation loss or increased drift, and is not guaranteed across temperature or load conditions. The MAX6018AEUR21+T maintains full specification compliance only within its rated 2.25V–5.5V input range.
Does the MAX6018AEUR21+T require an external resistor to function?
No, the MAX6018AEUR21+T is a three-terminal series voltage reference and does not require any external resistor for basic operation. Unlike shunt-mode references, it regulates output voltage internally with fixed supply current independent of input voltage. External components are limited to recommended bypass capacitors: 0.1µF on IN and ≥100pF on OUT. Adding resistors would compromise its micropower advantage and is unnecessary for regulation.
Can the MAX6018AEUR21+T drive a 10kΩ load directly?
Yes, the MAX6018AEUR21+T can drive a 10kΩ load directly. At 2.048V output, a 10kΩ load draws 204.8μA - well within its ±1mA sourcing/sinking capability. Load regulation is specified at ≤1000μV/mA, so the output voltage shift would be ≤0.21mV, contributing <0.01% error. No buffer amplifier is needed for typical ADC reference or sensor bias applications with such loads.
What is the maximum capacitive load the MAX6018AEUR21+T can drive while remaining stable?
The MAX6018AEUR21+T remains stable with capacitive loads from 100pF up to 1000nF (1μF), as confirmed in the datasheet's "Capacitive-Load Stability Range" specification. This wide range accommodates PCB trace capacitance, ESD protection networks, and intentional filtering without risk of oscillation. Loads outside this range - especially <100pF - may cause instability or degraded transient response, so minimum 100pF output capacitance is mandatory for guaranteed operation.
How does temperature affect the output voltage accuracy of the MAX6018AEUR21+T?
The MAX6018AEUR21+T has a maximum temperature coefficient of 50ppm/°C, meaning its output voltage can drift up to ±0.1024mV/°C around the nominal 2.048V. Over the full –40°C to +85°C range (125°C span), total drift is capped at ±6.25mV (±0.305%). This is in addition to the ±4.1mV initial accuracy error. Thermal hysteresis contributes up to another ±0.266mV (130ppm) after temperature cycling. All these effects are fully characterized and guaranteed in the MAX6018AEUR21+T datasheet.
MAX6018AEUR21+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):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 1 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- 50µVp-p
- Noise - 10Hz to 10kHz:
- 175µVrms
- Voltage - Input:
- 2.25V ~ 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
MAX6018AEUR21+T FAQ
1.How can I place an order for MAX6018AEUR21+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6018AEUR21+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 MAX6018AEUR21+T reliable?
The price and inventory of MAX6018AEUR21+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6018AEUR21+T is usually 5 days.
3.What payment methods are accepted for MAX6018AEUR21+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6018AEUR21+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6018AEUR21+T?
MAX6018AEUR21+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6018AEUR21+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 MAX6018AEUR21+T?
For technical support, including MAX6018AEUR21+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6018AEUR21+T requirements.
6.How does Aetrix verify that MAX6018AEUR21+T is sourced from the original manufacturer or authorized distributors?
All MAX6018AEUR21+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 MAX6018AEUR21+T meets industry standards.
7.What is the process for return or replacement of MAX6018AEUR21+T?
All MAX6018AEUR21+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6018AEUR21+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 MAX6018AEUR21+T part is unused and in its original packaging.
Return procedure for MAX6018AEUR21+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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