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Analog Devices Inc./Maxim Integrated MAX6045AEUR+T
- Part No.:
- MAX6045AEUR+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6045AEUR+T.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,532
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Product details
Overview
MAX6045AEUR+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 VOUT + 0.2V to 12.6V supply across –40°C to +85°C. It serves as a stable reference for high-resolution ADCs and battery-powered sensor front-ends.
For engineers reviewing the MAX6045AEUR+T datasheet, MAX6045AEUR+T pinout, MAX6045AEUR+T application, or MAX6045AEUR+T equivalent, this page provides verified specifications, real-world use cases, pin-level design meaning, and validated alternative options for precision analog systems requiring ultra-low quiescent current (≤35μA) and minimal board area.
Technical Context
The MAX6045AEUR+T uses a proprietary curvature-correction circuit and laser-trimmed thin-film resistors to achieve <15ppm/°C tempco over –40°C to +85°C and 0.2% initial accuracy. Its series-mode architecture eliminates external biasing resistors and compensation capacitors.
It delivers ±500μA output sourcing/sinking capability with 0.16μV/μA load regulation (source) and 0.22μV/μA (sink), remains stable with 0–2.2nF load capacitance, and exhibits only 0.8μA/V supply current variation across input voltage - enabling predictable power budgeting in low-voltage systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.500V ±0.2% (±9mV) at +25°C - enables direct interface with 12-bit+ SAR ADCs without gain calibration |
| Tempco | ≤15ppm/°C (0°C to +70°C) - ensures ≤0.54mV drift over industrial temperature range |
| Quiescent Current | ≤35μA - supports >10-year battery life in 10μA-average IoT sensors |
| Dropout Voltage | 100mV at 500μA load - allows operation from 4.6V supply in 5V-rail-constrained systems |
| Load Regulation | 0.16μV/μA (source), 0.22μV/μA (sink) - maintains <100μV error under full 500μA dynamic load swing |
| Line Regulation | 25μV/V - contributes <125μV error over 5V supply tolerance (±5%) |
| Capacitive Load Stability | 0–2.2nF - eliminates need for output capacitor, saving PCB space in wearables and medical patches |
Pinout & Package
MAX6045AEUR+T is housed in a RoHS-compliant 3-pin SOT23-3 package (JEDEC MO-178AA), measuring 2.92mm × 1.30mm × 1.00mm, with gull-wing leads and coplanarity ≤0.10mm. Pin 1 (IN) accepts input voltage; Pin 2 (OUT) delivers regulated 4.500V; Pin 3 (GND) provides reference ground return path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Supply Voltage Input | Accepts 4.7V–12.6V input; must exceed VOUT + 0.2V for regulation; withstands –0.3V to +13.5V absolute max |
| 2 (OUT) | Reference Voltage Output | Delivers 4.500V ±0.2%; sinks or sources up to ±500μA; stable with 0–2.2nF capacitive load |
| 3 (GND) | Ground Reference | Low-impedance return path for load and internal bandgap core; must be connected directly to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Proprietary curvature-correction circuit | Reduces nonlinear temperature drift, enabling <15ppm/°C performance without external trimming |
| Laser-trimmed thin-film resistors | Guarantees 0.2% initial accuracy and long-term stability of 50ppm/1000h |
| No external compensation capacitor required | Eliminates 1–2 passive components and associated layout area in space-constrained modules |
| Supply-current independence from VIN | 0.8μA/V variation enables accurate battery-life modeling across wide input voltage ranges |
| Stable with zero output capacitance | Supports direct connection to high-impedance inputs (e.g., ADC reference pins) without stability risk |
Applications
| Portable Data Loggers | Industrial 4–20mA Transmitters |
|---|---|
Use Scenario: Battery-powered environmental sensor node logging temperature, humidity, and pressure every 10 seconds. IC Role / Device Role / Timing Role: Provides stable 4.500V reference for 16-bit sigma-delta ADC measuring RTD and thermistor bridges. Use Value: Enables <±0.1°C measurement accuracy over –25°C to +70°C ambient, with 12-year coin-cell lifetime due to 35μA quiescent current. | Use Scenario: Loop-powered field transmitter converting 4–20mA analog output to digital sensor data for PLC interface. IC Role / Device Role / Timing Role: Supplies precision reference to DAC generating 4–20mA current via op-amp and MOSFET. Use Value: Maintains <±0.05% full-scale linearity across –40°C to +85°C, meeting SIL-2 functional safety requirements for process control. |
| Medical Wearable ECG Front-End | High-Accuracy Digital Multimeters |
Use Scenario: Ultra-low-power chest-worn patch acquiring microvolt-level ECG signals with onboard ADC. IC Role / Device Role / Timing Role: References 24-bit delta-sigma ADC and sets gain for programmable instrumentation amplifier. Use Value: Delivers <1.5μV RMS noise (0.1–10Hz) and <215μV RMS broadband noise, preserving signal integrity for arrhythmia detection. | Use Scenario: Benchtop multimeter requiring 6½-digit DC voltage measurement accuracy. IC Role / Device Role / Timing Role: Primary reference for auto-ranging attenuator and integrating ADC subsystem. Use Value: Achieves <±2ppm/°C effective tempco after calibration, supporting 0.0015% basic DCV accuracy specification. |
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 IQ, SOIC-8 package | Higher accuracy and lower tempco but larger footprint and higher supply current | Select when sub-ppm/°C stability is critical and board space permits SOIC-8 |
| ADR3445 | 4.500V output, 10ppm/°C max tempco, 38μA IQ, SOT23-3 package | Nearly identical voltage and package; slightly better tempco but 3μA higher quiescent current | Prefer for new designs where 10ppm/°C is mandatory and 3μA extra IQ is acceptable |
Compared with REF43GM and ADR3445, MAX6045AEUR+T offers the lowest quiescent current (≤35μA) in SOT23-3 while maintaining 4.500V output and 15ppm/°C tempco - making it optimal for size- and battery-limited applications where moderate tempco suffices.
Availability
MAX6045AEUR+T is available at Aetrix Electronics and suitable for portable data loggers, industrial 4–20mA transmitters, medical wearable ECG front-ends, and high-accuracy digital multimeters requiring stable component supply, long-term calibration retention, and RoHS-compliant packaging.
Supply support for MAX6045AEUR+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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.
The MAX6045AEUR+T belongs to the MAX60xx family of precision, low-power, low-dropout voltage references designed specifically for battery-operated, space-constrained, and high-accuracy analog measurement systems.
FAQ
What is the maximum load current the MAX6045AEUR+T can source or sink?
The MAX6045AEUR+T can source or sink up to ±500μA while maintaining regulation within specifications. At 500μA load, dropout voltage remains ≤200mV, and load regulation is specified at 0.16μV/μA (source) and 0.22μV/μA (sink). Exceeding ±500μA may cause output voltage deviation beyond guaranteed limits or thermal stress in the SOT23-3 package.
Does the MAX6045AEUR+T require an external output capacitor for stability?
No, the MAX6045AEUR+T is internally compensated and stable with output capacitance ranging from 0 to 2.2nF. An external capacitor is optional and only recommended in applications with fast load or supply transients to reduce overshoot/undershoot. Omitting it saves board area - a key advantage in wearables and miniaturized sensor modules using MAX6045AEUR+T.
What is the minimum input voltage required for the MAX6045AEUR+T to regulate properly?
The MAX6045AEUR+T requires a minimum input voltage of VOUT + 0.2V = 4.7V to maintain regulation at full load. The absolute maximum input is +13.5V. Below 4.7V, the device enters dropout mode and output voltage drops linearly with input; operation below 4.7V is not guaranteed per datasheet specifications for MAX6045AEUR+T.
How does the supply current of the MAX6045AEUR+T vary with input voltage?
The MAX6045AEUR+T exhibits only 0.8μA/V variation in quiescent supply current across its input voltage range (4.7V to 12.6V). This near-constant current draw - typically 27–35μA - simplifies power budgeting and extends battery life in systems where input voltage fluctuates, unlike shunt references whose current scales with VIN. This behavior is intrinsic to the series-mode architecture of MAX6045AEUR+T.
Is the MAX6045AEUR+T pin-compatible with other devices in the MAX60xx family?
Yes, all MAX60xx devices (including MAX6012, MAX6021, MAX6025, MAX6030, MAX6041, MAX6045, and MAX6050) share identical 3-pin SOT23-3 pinout (IN, OUT, GND) and package dimensions. This allows drop-in replacement across output voltages (1.247V to 5.000V) without PCB redesign - a key design flexibility benefit confirmed for MAX6045AEUR+T and its family members.
MAX6045AEUR+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):
- 4.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 500 µA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 20ppm/°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
MAX6045AEUR+T FAQ
1.How can I place an order for MAX6045AEUR+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6045AEUR+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 MAX6045AEUR+T reliable?
The price and inventory of MAX6045AEUR+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6045AEUR+T is usually 5 days.
3.What payment methods are accepted for MAX6045AEUR+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6045AEUR+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6045AEUR+T?
MAX6045AEUR+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6045AEUR+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 MAX6045AEUR+T?
For technical support, including MAX6045AEUR+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6045AEUR+T requirements.
6.How does Aetrix verify that MAX6045AEUR+T is sourced from the original manufacturer or authorized distributors?
All MAX6045AEUR+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 MAX6045AEUR+T meets industry standards.
7.What is the process for return or replacement of MAX6045AEUR+T?
All MAX6045AEUR+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6045AEUR+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 MAX6045AEUR+T part is unused and in its original packaging.
Return procedure for MAX6045AEUR+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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