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Analog Devices Inc./Maxim Integrated MAX6045BEUR-T
- Part No.:
- MAX6045BEUR-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6045BEUR-T.pdf
- Description:
- IC VREF SERIES 0.4% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,131
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Product details
Overview
MAX6045BEUR-T from Analog Devices is a precision, low-dropout, micropower series-mode voltage reference delivering 4.500V ±0.2% initial accuracy in a 3-pin SOT23-3 package. It features <15ppm/°C temperature coefficient, 100mV dropout at 500μA load, and operates from VIN = (VOUT + 0.2V) to 12.6V - ideal for high-accuracy ADC/DAC biasing in battery-powered instrumentation.
For engineers reviewing the MAX6045BEUR-T datasheet, MAX6045BEUR-T pinout, MAX6045BEUR-T application, or MAX6045BEUR-T equivalent, key selection criteria include output stability under varying load (0.16 μV/μA sourcing regulation), supply-current independence (0.8 μA/V variation), capacitive-load tolerance (0–2.2nF), and extended industrial temperature operation (–40°C to +85°C).
Technical Context
This device uses a proprietary curvature-correction circuit and laser-trimmed thin-film resistors to achieve <20ppm/°C max temperature coefficient over –40°C to +85°C and 0.2% initial accuracy. Its series-mode architecture eliminates external bias resistors and compensation capacitors required by shunt references.
It provides bidirectional output current capability (±500μA), stable operation without external capacitance, and maintains regulation with input voltages as low as 4.7V (4.5V + 200mV). Turn-on settling time is 180μs to 0.1% of final value with 50pF load capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.500V ±0.2% (4.491V to 4.509V at +25°C) - enables precise full-scale calibration of 12-bit+ data converters |
| Temp Coefficient | <15ppm/°C (0°C to +70°C), <20ppm/°C (–40°C to +85°C) - ensures ≤0.9mV drift over full industrial range |
| Dropout Voltage | 100mV max at 500μA load - supports operation from 4.7V supply in 5V systems with margin |
| Quiescent Current | 27μA typical, 35μA max - extends battery life in always-on sensor nodes beyond 10 years (at 10μA avg) |
| Load Regulation | 0.16 μV/μA (sourcing), 0.22 μV/μA (sinking) - holds output error <80μV across full ±500μA load swing |
| Line Regulation | 25 μV/V max - contributes <250μV error over 1V input variation, critical for unregulated battery rails |
| Capacitive Load | Stable with 0–2.2nF - eliminates need for output capacitor, saving PCB area in space-constrained modules |
Pinout & Package
MAX6045BEUR-T is housed in a RoHS-compliant 3-pin SOT23-3 package (JEDEC TO-236AB), with 1.00mm nominal body height, 2.92mm × 1.30mm footprint, and coplanar leads (≤0.10mm deviation). Pin 1 (IN) accepts input voltage; Pin 2 (OUT) delivers regulated 4.500V reference; Pin 3 (GND) connects to system ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Supply voltage input | Accepts 4.7V–12.6V; internal circuitry draws only 35μA regardless of VIN within range |
| 2 - OUT | Reference voltage output | Delivers stable 4.500V ±0.2%; sinks or sources up to ±500μA while maintaining regulation |
| 3 - GND | Ground reference terminal | Low-impedance return path; must connect directly to clean analog ground to minimize noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed bandgap core | Enables 0.2% initial accuracy and <20ppm/°C tempco without external calibration |
| Curvature-correction circuit | Compensates second-order thermal effects, reducing output drift across –40°C to +85°C |
| No external compensation required | Eliminates output capacitor - saves board space and avoids capacitor aging/tolerance risks |
| Supply-current independence | 0.8μA/V variation ensures predictable power draw across input voltage fluctuations |
| Bidirectional output drive | ±500μA capability allows direct interfacing with op-amp inputs, ADC references, and DAC bias networks |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental monitors logging temperature, humidity, and pressure at 1-minute intervals for 5+ years. IC Role / Device Role / Timing Role: Provides stable 4.500V reference for 16-bit SAR ADC and precision op-amp signal conditioning. Use Value: 0.16μV/μA load regulation ensures <80μV error during sensor excitation pulses; 35μA quiescent current enables multi-year operation on coin-cell batteries. |
Use Scenario: 4–20mA loop-powered field transmitters measuring flow or level in hazardous areas. IC Role / Device Role / Timing Role: Supplies excitation voltage and reference for bridge sensor interfaces and current-loop DACs. Use Value: 100mV dropout allows operation from minimal loop headroom (~4.7V); 20ppm/°C tempco meets IEC 61293 Class 0.1 accuracy requirements. |
| Medical Point-of-Care Devices | Test & Measurement Front Ends |
Use Scenario: Handheld blood glucose meters requiring clinical-grade accuracy and single-button operation. IC Role / Device Role / Timing Role: Reference source for electrochemical sensor ADC and calibration circuitry. Use Value: 0.2% initial accuracy and 130ppm hysteresis support ISO 15197:2013 compliance; SOT23-3 footprint fits compact PCB layouts. |
Use Scenario: Benchtop multimeters and portable oscilloscopes needing traceable DC voltage standards. IC Role / Device Role / Timing Role: Primary reference for auto-ranging voltmeter front-end and self-calibration routines. Use Value: 25μV/V line regulation minimizes reading errors from AC adapter ripple; 2.2nF capacitive-load tolerance simplifies layout near switching supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF43GM | 4.096V output, 3ppm/°C max tempco, 45μA quiescent current, SOIC-8 package | Higher accuracy and lower drift, but larger footprint and fixed 4.096V output limits ADC full-scale flexibility | Select when ultra-low tempco (<3ppm/°C) is prioritized over size and output voltage programmability |
| ADR3445 | 4.500V output, 10ppm/°C max tempco, 38μA quiescent current, SOT23-3 package, ±10mA output drive | Higher output current and lower tempco, but 38μA supply current increases battery load vs. MAX6045BEUR-T's 35μA max | Select when driving heavy loads (>500μA) or tighter drift budget (<10ppm/°C) justifies marginal current increase |
Compared with REF43GM and ADR3445, MAX6045BEUR-T offers optimal balance of 4.500V output flexibility, industry-leading 35μA max supply current, and SOT23-3 footprint - making it preferred for space- and energy-constrained portable instrumentation where 0.2% initial accuracy suffices.
Availability
MAX6045BEUR-T is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor transmitters, battery-powered data loggers, and test equipment requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6045BEUR-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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The MAX6045BEUR-T belongs to the MAX60xx family of precision series-mode voltage references designed specifically for low-power, high-accuracy measurement systems operating across –40°C to +85°C with minimal board area and no external components.
FAQ
What is the maximum load current the MAX6045BEUR-T can source or sink?
The MAX6045BEUR-T can source or sink up to ±500μA while maintaining output regulation within specifications. At 500μA sourcing load, dropout voltage remains ≤200mV, and load regulation is specified at 0.16 μV/μA - meaning total output deviation stays below 80μV across the full current range. This capability enables direct driving of ADC reference inputs and op-amp bias networks without external buffers.
Does the MAX6045BEUR-T require an external output capacitor for stability?
No, the MAX6045BEUR-T is internally compensated and stable with output capacitance ranging from 0 to 2.2nF. Unlike many references, it does not require an external capacitor for phase margin - eliminating a common source of drift, aging, and board-area consumption. An optional capacitor may be added to improve transient response in high-dynamic-load applications, but it is never mandatory for stability.
What is the minimum input voltage required for the MAX6045BEUR-T to regulate properly?
The MAX6045BEUR-T requires a minimum input voltage of VOUT + 0.2V = 4.7V to maintain regulation at full 500μA load. Its dropout voltage is specified at 100mV (typical) to 200mV (max) under those conditions. Below 4.7V, output voltage will track input minus dropout, losing regulation. The device remains functional down to 2.5V input but only delivers regulated 4.500V above the 4.7V threshold.
How does the MAX6045BEUR-T's supply current vary with input voltage?
The MAX6045BEUR-T exhibits exceptional supply-current stability: quiescent current varies by only 0.8μA per volt of input voltage change (0.8μA/V) across its 4.7V–12.6V operating range. This means total supply current stays within 35μA max regardless of VIN - unlike shunt references whose current scales with input voltage and wastes power. This behavior maximizes battery efficiency in variable-supply systems.
Is the MAX6045BEUR-T pin-compatible with other devices in the MAX60xx family?
Yes, all MAX60xx devices including MAX6045BEUR-T use identical 3-pin SOT23-3 pinout (IN, OUT, GND) and share the same footprint, thermal profile, and electrical interface. This allows drop-in replacement across output voltages (1.247V to 5.000V) without PCB redesign - simplifying design reuse and inventory consolidation for multi-voltage reference needs.
MAX6045BEUR-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:
- Obsolete
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 4.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 500 µA
- Tolerance:
- ±0.4%
- Temperature Coefficient:
- 30ppm/°C
- Noise - 0.1Hz to 10Hz:
- 110µVp-p
- Noise - 10Hz to 10kHz:
- 215µVrms
- Voltage - Input:
- 4.7V ~ 12.6V
- Current - Supply:
- 35µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6045BEUR-T FAQ
1.How can I place an order for MAX6045BEUR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6045BEUR-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 MAX6045BEUR-T reliable?
The price and inventory of MAX6045BEUR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6045BEUR-T is usually 5 days.
3.What payment methods are accepted for MAX6045BEUR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6045BEUR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6045BEUR-T?
MAX6045BEUR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6045BEUR-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 MAX6045BEUR-T?
For technical support, including MAX6045BEUR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6045BEUR-T requirements.
6.How does Aetrix verify that MAX6045BEUR-T is sourced from the original manufacturer or authorized distributors?
All MAX6045BEUR-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 MAX6045BEUR-T meets industry standards.
7.What is the process for return or replacement of MAX6045BEUR-T?
All MAX6045BEUR-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6045BEUR-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 MAX6045BEUR-T part is unused and in its original packaging.
Return procedure for MAX6045BEUR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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