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Analog Devices Inc./Maxim Integrated MAX6066BEUR
- Part No.:
- MAX6066BEUR
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6066BEUR.pdf
- Description:
- VOLTAGE REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:1,153
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Product details
Overview
MAX6066BEUR from Maxim Integrated is a precision, low-dropout, micropower series voltage reference delivering a stable 2.500V output with ±0.4% initial accuracy and 20ppm/°C max temperature coefficient over –40°C to +85°C. It sources up to 5mA or sinks 2mA, operates from (VOUT + 0.2V) to 12.6V input, and draws only 90µA typical quiescent current - ideal for high-accuracy ADC biasing in portable instrumentation.
For engineers reviewing the MAX6066BEUR datasheet, MAX6066BEUR pinout, MAX6066BEUR application, or MAX6066BEUR equivalent, this page delivers verified electrical specs, SOT23-3 terminal roles, real-world load regulation behavior (0.5–0.9 mV/mA), dropout performance (≤200mV at 1mA), and validated alternatives for battery-powered precision analog systems.
Technical Context
The MAX6066BEUR employs a proprietary curvature-correction circuit and laser-trimmed thin-film resistors to achieve tight initial accuracy and ultra-low thermal drift. Its internal compensation eliminates need for external capacitors, enabling stable operation with capacitive loads up to 1µF without oscillation.
As a three-terminal series-mode reference, it features supply-current independence (±8µA/V variation) and no external bias resistor - unlike shunt references - reducing wasted current and simplifying design in space-constrained, low-power applications such as handheld DMMs and sensor signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±0.4% at +25°C - ensures reliable 12-bit+ ADC reference accuracy across industrial temperature range |
| Temp Coefficient | 20ppm/°C (max) - limits full-range drift to ≤1.05mV over –40°C to +85°C, critical for precision measurement |
| Dropout Voltage | ≤200mV at 1mA load - enables operation from 2.7V supply in 3V systems with margin for battery sag |
| Quiescent Current | 90µA (typ), ≤125µA (max) - supports >1-year battery life in 10µA-average-power IoT sensors |
| Load Regulation | 0.5–0.9 mV/mA sourcing - maintains <0.1% output shift under 5mA dynamic load, e.g., SAR ADC sampling bursts |
| Line Regulation | 60–300 µV/V - rejects input ripple effectively even with unregulated Li-ion or DC-DC outputs |
| Noise (0.1–10Hz) | 27µVp-p - contributes <0.001% error in 2.5V full-scale 16-bit systems (≈0.39 LSB) |
Pinout & Package
MAX6066BEUR is housed in a 3-pin SOT23-3 package (JEDEC MO-178AA), footprint-compatible with industry-standard SOT-23 layouts and reflow-process ready.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply terminal | Accepts 2.7V–12.6V; requires no external series resistor; bypass capacitor optional for line transients |
| 2 (OUT) | Precision reference output | Delivers 2.500V with sourcing/sinking capability; stable without output capacitor; drives ADC REF pins directly |
| 3 (GND) | Analog ground reference | Must be connected to clean system AGND; separates reference return from digital or power ground paths |
Key Features
| Feature | Design Value |
|---|---|
| No external compensation capacitor required | Reduces BOM count and PCB area by eliminating mandatory 1–10nF ceramic cap, easing layout in ultra-compact designs |
| Stable with capacitive loads up to 1µF | Enables direct connection to ADC input caps or long traces without phase-margin risk - no RC snubber needed |
| Supply-current independence (≤8µA/V variation) | Eliminates input-voltage-dependent current waste - unlike shunt references - improving battery efficiency across discharge curve |
| Low dropout (≤200mV @ 1mA) | Permits use in 2.7V nominal systems (e.g., single-cell LiFePO₄) while maintaining regulation during brownout |
| ±0.4% initial accuracy (Grade B) | Meets calibration-grade requirements for portable test equipment without factory trimming or software correction |
Applications
| Portable Digital Multimeters (DMMs) | Handheld Gas Detectors |
|---|---|
Use Scenario: Battery-powered DMM measuring DC voltage with 4½-digit resolution and auto-ranging. IC Role / Device Role / Timing Role: Primary 2.5V reference for dual-slope or sigma-delta ADC, setting full-scale range and offset null point. Use Value: 20ppm/°C drift ensures <0.01% reading error over operating temperature; 90µA supply current extends alkaline battery life to >500 hours. |
Use Scenario: Low-power electrochemical gas sensor node logging CO concentration every 10 seconds. IC Role / Device Role / Timing Role: Stable excitation reference for transimpedance amplifier and ADC reference in analog front-end. Use Value: ±0.4% initial accuracy enables factory calibration validity for 2 years; no output cap saves space on 12mm × 12mm sensor PCB. |
| Industrial Temperature Transmitters | Medical Patient Monitor Analog Front-Ends |
Use Scenario: Loop-powered 4–20mA transmitter converting RTD resistance to current using HART modulation. IC Role / Device Role / Timing Role: Precision 2.5V reference for ratiometric excitation of 3-wire RTD bridge and ADC reference. Use Value: 0.5 mV/mA load regulation ensures <0.005% gain error when driving DAC-controlled current source; SOT23 fits tight enclosure. |
Use Scenario: Portable ECG module digitizing biopotential signals with 24-bit delta-sigma ADC. IC Role / Device Role / Timing Role: Low-noise 2.5V reference for ADC and programmable-gain amplifier biasing. Use Value: 27µVp-p (0.1–10Hz) noise contributes <0.15 LSB RMS noise in 2.5V/2²⁴ range; stable with 100nF decoupling per ADC channel. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3425BRJZ-R7 | 2.5V ±0.1% initial accuracy, 3ppm/°C TC, 120µA IQ, SOT23-3 | Higher accuracy and lower drift, but 33% higher quiescent current; requires 100nF output cap for stability | Select when sub-0.1% system accuracy is required and board space allows extra capacitor |
| REF3025AIDBZR | 2.5V ±0.2% initial accuracy, 50ppm/°C TC, 50µA IQ, SOT23-3 | Lower power but 2.5× higher tempco; no output cap required; 10mV dropout at 1mA | Select for ultra-low-power sensor nodes where 50ppm/°C drift is acceptable and supply headroom is limited |
Compared with ADR3425BRJZ-R7 and REF3025AIDBZR, MAX6066BEUR offers the optimal balance of moderate accuracy (±0.4%), ultra-low drift (20ppm/°C), micropower operation (90µA), and capacitor-free stability - making it uniquely suited for cost-sensitive, space-constrained portable instrumentation requiring robust performance across temperature.
Availability
MAX6066BEUR is available at Aetrix Electronics and suitable for portable battery-powered systems, precision ADC reference circuits, and industrial sensor signal conditioning requiring stable component supply and guaranteed long-term availability.
Supply support for MAX6066BEUR 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 semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX6061–MAX6068 family was designed specifically for space- and power-constrained precision analog systems needing stable, low-drift, low-quiescent-current voltage references in ultra-small SOT23 packages.
FAQ
What is the maximum load current the MAX6066BEUR can source or sink?
The MAX6066BEUR can source up to 5mA and sink up to 2mA while maintaining specified accuracy and regulation. This capability allows direct driving of ADC reference inputs, op-amp bias networks, or small DACs without external buffers - a key advantage over lower-output-current references like the REF3025. The MAX6066BEUR's load regulation remains within 0.9mV/mA across its full sourcing range.
Does the MAX6066BEUR require an output capacitor for stability?
No, the MAX6066BEUR is internally compensated and does not require an external output capacitor for stability - a confirmed feature documented in the datasheet Applications Information section. It remains stable with capacitive loads up to 1µF, enabling capacitor-free operation in space-critical designs. Adding a 0.1µF ceramic cap is optional and only recommended to improve transient response in high-dynamic-load scenarios.
What is the minimum input voltage required for the MAX6066BEUR to regulate at 2.5V?
The MAX6066BEUR requires a minimum input voltage of (VOUT + 0.2V) = 2.7V to maintain regulation at 2.5V output, as specified in the Selector Guide and Electrical Characteristics table. At 1mA load, its dropout voltage is guaranteed ≤200mV, meaning it will deliver 2.5V ±0.4% down to 2.7V input - supporting operation from partially discharged single-cell lithium batteries or low-headroom LDO outputs.
How does the MAX6066BEUR's temperature coefficient compare to other SOT23 voltage references?
The MAX6066BEUR has a maximum temperature coefficient of 20ppm/°C - significantly better than general-purpose references like REF3025 (50ppm/°C) and competitive with premium parts such as ADR3425 (3ppm/°C). This 20ppm/°C spec ensures total output drift of ≤1.05mV over –40°C to +85°C, making MAX6066BEUR suitable for applications demanding stability without the cost premium of ultra-low-drift alternatives.
Is the MAX6066BEUR pin-compatible with other devices in the MAX6061–MAX6068 family?
Yes, all MAX6061–MAX6068 variants - including MAX6066BEUR - share identical 3-pin SOT23-3 pinout (IN, OUT, GND) and identical footprint, allowing drop-in replacement across output voltages (1.25V to 5.0V) without PCB redesign. This simplifies inventory management and enables flexible reference selection during prototyping or production ramp based on system voltage architecture.
MAX6066BEUR 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):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.4%
- Temperature Coefficient:
- 30ppm/°C
- Noise - 0.1Hz to 10Hz:
- 27µVp-p
- Noise - 10Hz to 10kHz:
- 30µVrms
- Voltage - Input:
- 2.7V ~ 12.6V
- Current - Supply:
- 125µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6066BEUR FAQ
1.How can I place an order for MAX6066BEUR through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6066BEUR 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 MAX6066BEUR reliable?
The price and inventory of MAX6066BEUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6066BEUR is usually 5 days.
3.What payment methods are accepted for MAX6066BEUR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6066BEUR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6066BEUR?
MAX6066BEUR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6066BEUR 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 MAX6066BEUR?
For technical support, including MAX6066BEUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6066BEUR requirements.
6.How does Aetrix verify that MAX6066BEUR is sourced from the original manufacturer or authorized distributors?
All MAX6066BEUR 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 MAX6066BEUR meets industry standards.
7.What is the process for return or replacement of MAX6066BEUR?
All MAX6066BEUR units undergo pre-shipment inspection (PSI). If there is an issue with MAX6066BEUR, 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 MAX6066BEUR part is unused and in its original packaging.
Return procedure for MAX6066BEUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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