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Analog Devices Inc./Maxim Integrated MAX6045BEUR
- Part No.:
- MAX6045BEUR
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6045BEUR.pdf
- Description:
- VOLTAGE REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:1,642
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Product details
Overview
The MAX6045BEUR from Maxim Integrated is a precision, low-dropout, micropower series-mode voltage reference in SOT23-3 package, delivering 4.500V ±0.009V output with 0.2% initial accuracy and ≤15ppm/°C temperature coefficient over –40°C to +85°C. It draws only 35µA quiescent current, supports ±500µA load sourcing/sinking, and maintains stability with up to 2.2nF capacitive load-ideal for battery-powered data acquisition and industrial sensor front-ends.
For engineers reviewing the MAX6045BEUR datasheet, MAX6045BEUR pinout, MAX6045BEUR application, or MAX6045BEUR equivalent, this page provides verified electrical specifications, thermal performance data, load/transient behavior, dropout characteristics at 500µA, and validated alternative options for precision analog signal chains requiring stable 4.5V reference rails.
Technical Context
This device uses a proprietary curvature-correction circuit and laser-trimmed thin-film resistors to achieve <15ppm/°C tempco and 0.2% initial accuracy. It operates as a series-mode (three-terminal) reference, eliminating need for external bias resistors or compensation capacitors.
Its supply current varies only 0.8µA/V across input voltage (VIN = VOUT + 0.2V to 12.6V), and it delivers 100mV dropout at 500µA load while maintaining 0.12µV/µA load regulation and 25µV/V line regulation-enabling reliable operation in low-voltage, space-constrained systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.500V ±0.009V (guaranteed over –40°C to +85°C; enables precise ADC/DAC biasing) |
| Initial Accuracy | ±0.2% (max) - ensures calibration-grade performance without post-manufacture trimming |
| Tempco | ≤15ppm/°C (max) - minimizes drift across industrial temperature range |
| Quiescent Current | 35µA (max) - extends battery life in portable instrumentation |
| Dropout Voltage | 100mV (typ) at 500µA load - supports operation from 4.6V supply in 4.5V-referenced systems |
| Load Regulation | 0.12µV/µA - holds output stable under dynamic sensor or amplifier loading |
| Capacitive Load Stability | 0–2.2nF - eliminates need for external capacitor, saving PCB area |
Pinout & Package
Package: SOT23-3, surface-mount, 3-pin miniature plastic package (JEDEC MO-178AA compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Supply Input | Voltage input terminal; requires VIN ≥ VOUT + 0.2V (min 4.7V for full spec compliance) |
| 2 (OUT) | Reference Output | Stable 4.500V output node; capable of sourcing or sinking ±500µA |
| 3 (GND) | Ground Reference | Analog ground return; must be low-impedance path to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| No external resistor required | Series-mode architecture eliminates bias resistor, reducing BOM count and layout sensitivity |
| No external capacitor needed | Internally compensated for 0–2.2nF load capacitance-saves board space in wearables and IoT nodes |
| Ultra-low supply current variation | Only 0.8µA/V change in IIN vs. VIN - simplifies power budgeting across varying battery voltages |
| Low-noise output | 215µVRMS (0.1Hz–10kHz) - suitable for high-resolution 16-bit+ SAR and delta-sigma ADCs |
| Fast turn-on settling | 180µs to 0.1% of final value - supports duty-cycled measurement systems |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental monitoring units sampling temperature, humidity, and pressure at 10s intervals. IC Role / Device Role / Timing Role: Provides stable 4.5V reference for 24-bit delta-sigma ADC and microcontroller VREF input. Use Value: Enables <±0.01% total unadjusted error over –25°C to +70°C without recalibration, extending field service interval. | Use Scenario: 4–20mA loop-powered pressure transmitters operating in hazardous zones. IC Role / Device Role / Timing Role: Supplies precision reference for current-loop DAC and sensor signal conditioning amplifier. Use Value: Maintains 0.2% accuracy despite 12–36V loop supply variation and ambient temperature swings, meeting SIL-2 functional safety margin. |
| Medical Point-of-Care Devices | Automated Test Equipment (ATE) |
Use Scenario: Handheld blood glucose meters using electrochemical strip sensing. IC Role / Device Role / Timing Role: Generates accurate 4.5V bias for transimpedance amplifier and ADC reference in low-power mode. Use Value: Delivers <15ppm/°C drift across 10–40°C operating range, ensuring <±2mg/dL glucose reading consistency. | Use Scenario: Modular PXI-based DAQ modules performing multi-channel voltage measurements. IC Role / Device Role / Timing Role: Serves as per-slot reference for 18-bit simultaneous-sampling ADCs. Use Value: 0.12µV/µA load regulation prevents crosstalk-induced errors during concurrent channel sampling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3445ARJZ-R7 | Higher initial accuracy (±0.1%), higher quiescent current (120µA), same 4.5V output and SOT23-3 package | Better accuracy but reduces battery life in ultra-low-power designs | Select when absolute accuracy outweighs current consumption |
| REF3045AIDBZR | Lower tempco (8ppm/°C), higher max load current (25mA), larger SOT23-5 package with enable pin | Requires PCB redesign; suited for high-current analog front-ends | Choose when long-term stability and drive capability are critical |
Compared with ADR3445ARJZ-R7 and REF3045AIDBZR, the MAX6045BEUR offers the lowest quiescent current (35µA) and smallest footprint (SOT23-3), making it optimal for size- and energy-constrained applications where 0.2% accuracy is sufficient and load current stays below 500µA.
Availability
MAX6045BEUR is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor transmitters, battery-powered data loggers, and automated test equipment requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6045BEUR 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 industrial, automotive, communications, and computing markets.
The MAX6012 family-including MAX6045BEUR-is engineered for precision, low-power, low-dropout voltage referencing in space- and energy-constrained systems, targeting applications demanding high initial accuracy and minimal thermal drift without external components.
FAQ
What is the maximum input voltage for MAX6045BEUR?
The MAX6045BEUR supports input voltages from (VOUT + 0.2V) = 4.7V up to 12.6V. Absolute maximum rating is +13.5V on the IN pin. Operation above 12.6V risks exceeding power dissipation limits in the SOT23-3 package, especially at elevated temperatures.
Does MAX6045BEUR require an external output capacitor?
No. The MAX6045BEUR is internally compensated and stable with 0–2.2nF output capacitance. An external capacitor is optional and only recommended in applications with fast load or supply transients to improve overshoot/undershoot response-no capacitor is needed for basic DC reference stability.
What is the load current capability of MAX6045BEUR?
The MAX6045BEUR can source or sink up to ±500µA while maintaining specified accuracy and dropout voltage. At ±500µA, dropout remains ≤200mV, and load regulation is 0.12µV/µA-ensuring minimal output shift across its full rated load range.
How does MAX6045BEUR compare to shunt-mode references like TL431?
Unlike TL431, the MAX6045BEUR is a three-terminal series-mode reference that draws near-constant 35µA supply current regardless of input voltage or load-eliminating the need for a series bias resistor and avoiding wasted current. It also achieves superior tempco (<15ppm/°C vs. ~50ppm/°C) and lower noise.
Is MAX6045BEUR suitable for use with high-resolution ADCs?
Yes. With 215µVRMS (0.1Hz–10kHz) noise, 0.2% initial accuracy, and <15ppm/°C tempco, the MAX6045BEUR supports 16-bit to 18-bit SAR and delta-sigma ADCs. Its 0.12µV/µA load regulation prevents code-dependent errors during dynamic conversions.
MAX6045BEUR 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):
- 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 FAQ
1.How can I place an order for MAX6045BEUR through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6045BEUR 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 reliable?
The price and inventory of MAX6045BEUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6045BEUR is usually 5 days.
3.What payment methods are accepted for MAX6045BEUR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6045BEUR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6045BEUR?
MAX6045BEUR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6045BEUR 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?
For technical support, including MAX6045BEUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6045BEUR requirements.
6.How does Aetrix verify that MAX6045BEUR is sourced from the original manufacturer or authorized distributors?
All MAX6045BEUR 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 meets industry standards.
7.What is the process for return or replacement of MAX6045BEUR?
All MAX6045BEUR units undergo pre-shipment inspection (PSI). If there is an issue with MAX6045BEUR, 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 part is unused and in its original packaging.
Return procedure for MAX6045BEUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6045BEUR Tags
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TL431AIDBZR
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TL431BQDBZR
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AN431AN-ATRG1
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LM4040CYM3-2.5-TR
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LM4040EIM3-2.5/NOPB
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AZ431LBNTR-G1
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LM4040D20IDBZR
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LM4041DIM3-ADJ/NOPB
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LM4040DIM3X-2.5/NOPB
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LM4040DIM3-2.5/NOPB
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AZ431LANTR-G1
Diodes Incorporated
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