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Analog Devices Inc./Maxim Integrated MAX6145EUR-T
- Part No.:
- MAX6145EUR-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6145EUR-T.pdf
- Description:
- IC VREF SERIES 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,636
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Product details
Overview
MAX6145EUR-T from Maxim Integrated is a precision 4.5V low-dropout three-terminal voltage reference in SOT23-3 package, featuring ±1% initial accuracy, 15ppm/°C typical temperature coefficient, and 200mV dropout at 1mA load-optimized for 3V/5V battery-powered instrumentation and data-acquisition systems.
For engineers reviewing the MAX6145EUR-T datasheet, MAX6145EUR-T pinout, MAX145EUR-T application, or MAX6145EUR-T equivalent, this page delivers verified electrical specs, thermal stability data, supply-current independence from input voltage, and real-world design guidance for high-accuracy analog signal chains.
Technical Context
The MAX6145EUR-T uses a bandgap-based reference core with internal trimming to achieve ±1% output tolerance at +25°C and guaranteed ≤50ppm/°C drift over –40°C to +85°C. Its 3-pin architecture integrates IN, OUT, and GND terminals without external resistors or adjustment pins-unlike the 4-pin MAX6160.
It operates from 4.7V to 12.6V input, delivers stable 4.5V output up to 1mA sourcing/sinking, and maintains 79–105µA quiescent current independent of VIN variation-enabling predictable battery life in portable systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.500V ±0.045V at +25°C; ±0.090V over –40°C to +85°C - ensures ADC/DAC reference stability across industrial temperature range |
| Initial Accuracy | ±1% - eliminates need for system-level calibration in mid-precision measurement applications |
| Tempco | 15ppm/°C typical, ≤50ppm/°C max - contributes <0.225mV drift over 15°C ambient shift |
| Dropout Voltage | 200mV at 1mA - supports operation from 4.7V supply in 5V systems with margin |
| Supply Current | 79–105µA at +25°C; ≤130µA over full temp range - enables multi-year battery life in µA-budget devices |
| Line Regulation | 2µV/V typical - rejects supply ripple better than 100dB up to low frequencies |
| Load Regulation | 0.6–1.8mV/mA sourcing; 1.75–18mV/mA sinking - defines worst-case error when driving DAC reference inputs |
Pinout & Package
MAX6145EUR-T is housed in a RoHS-compliant 3-pin SOT23-3 package (JEDEC MO-178AB), with 1.3mm × 0.8mm footprint and 1.0mm height - compatible with standard high-density PCB assembly processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input Supply Terminal | Accepts 4.7V to 12.6V DC; requires ≥0.1µF ceramic bypass capacitor placed adjacent to pin for optimal line-transient rejection |
| 2 (OUT) | Precision Reference Output | Delivers regulated 4.5V; stable with 0–10nF capacitive loads - no output capacitor required unless charge reservoir needed |
| 3 (GND) | Analog Ground Reference | Must be connected to clean, low-impedance system ground plane; separates reference return from digital or power ground paths |
Key Features
| Feature | Design Value |
|---|---|
| Low Dropout | 200mV at 1mA enables use in 5V systems with tight headroom - avoids need for boost regulators or higher-supply rails |
| Supply-Current Stability | 79–105µA over VIN = 4.7V–12.6V - eliminates dynamic current draw uncertainty in battery SOC estimation |
| Capacitive Load Immunity | Stable with 0–10nF output capacitance - simplifies layout by removing mandatory compensation networks |
| Thermal Hysteresis | 80ppm maximum - limits repeatability error after thermal cycling in field-deployed equipment |
| PSRR Performance | >60dB at 1kHz - suppresses switching regulator noise coupling into precision analog subsystems |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and pressure at 1Hz intervals for 5+ years. IC Role / Device Role / Timing Role: Provides stable 4.5V reference for 16-bit SAR ADC and low-power microcontroller VREF input. Use Value: 15ppm/°C tempco and 79µA supply current directly extend usable battery life while maintaining ±0.007% full-scale accuracy over operating temperature. | Use Scenario: 4–20mA loop-powered transmitter converting RTD or thermocouple signals in oil & gas field instruments. IC Role / Device Role / Timing Role: Supplies excitation and reference voltage for bridge sensor conditioning and 12-bit DAC output stage. Use Value: 200mV dropout allows operation from minimal loop voltage headroom (≤5.5V), while ±1% initial accuracy eliminates factory trim steps. |
| Medical Point-of-Care Monitors | Test & Measurement Front Ends |
Use Scenario: Handheld ECG device acquiring biopotential signals with 100dB SNR requirement and AA-cell battery operation. IC Role / Device Role / Timing Role: Precision voltage reference for analog front-end PGA gain-setting and ADC reference rail. Use Value: 0.1Hz–10Hz noise of 30µVP-P prevents baseline wander corruption of sub-mV cardiac waveforms. | Use Scenario: Benchtop multimeter digitizing mV-range thermocouple outputs with auto-ranging and 5½-digit resolution. IC Role / Device Role / Timing Role: Primary reference source for dual-slope integrator and calibration offset correction circuitry. Use Value: ≤50ppm/°C max tempco and 80ppm thermal hysteresis ensure traceable accuracy between calibration cycles without oven control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF43GM | 4.096V fixed output, 10ppm/°C max tempco, 125µA IQ, SO-8 only | Higher precision but higher supply current and larger package - unsuitable for space-constrained SOT23 designs | Select REF43GM only if 4.096V matches ADC full-scale and board area permits SO-8 |
| ADR3445 | 4.5V output, 10ppm/°C max tempco, 120µA IQ, SOT23-3 package, ±0.1% initial accuracy | Superior accuracy and tempco, but 50% higher quiescent current - trades battery life for metrology-grade performance | Choose ADR3445 when system-level calibration is impractical and long-term drift budget is <50ppm |
Compared with REF43GM and ADR3445, the MAX6145EUR-T offers the lowest supply current in SOT23-3 at 4.5V, making it optimal for ultra-low-power portable instrumentation where battery runtime outweighs marginal accuracy gains.
Availability
MAX6145EUR-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 MAX6145EUR-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 (now part of Analog Devices) designs precision analog, mixed-signal, and power-management ICs for industrial, medical, and communications applications.
The MAX61xx family was engineered specifically for low-power, high-stability voltage referencing in battery-operated and space-constrained systems - prioritizing dropout voltage, supply-current predictability, and thermal stability over raw accuracy.
FAQ
What is the minimum input voltage required for stable operation of the MAX6145EUR-T?
The MAX6145EUR-T requires a minimum input voltage of 4.7V to maintain regulation at its nominal 4.5V output, due to its 200mV dropout specification. Operation below 4.7V risks output collapse or increased load regulation error. This headroom enables reliable function in 5V systems with supply droop or ripple, and is validated across –40°C to +85°C per the datasheet's Electrical Characteristics table.
Does the MAX6145EUR-T require an output capacitor for stability?
No, the MAX6145EUR-T does not require an output capacitor. It is internally compensated and remains stable with capacitive loads from 0nF to 10nF. An output capacitor is only recommended if the application needs local charge reservoir capability-for example, to buffer transient current demands from a DAC reference input-provided total capacitance stays ≤10nF to preserve settling time performance.
How does the supply current of the MAX6145EUR-T vary with temperature?
The MAX6145EUR-T draws 79–105µA at +25°C and up to 130µA over the full –40°C to +85°C range. Its supply current exhibits minimal sensitivity to input voltage changes (≤6µA/V), making it highly predictable for battery-life modeling. This behavior is confirmed in Figure MAX6125 toc02 and the Electrical Characteristics table under "Quiescent Supply Current".
Can the MAX6145EUR-T be used in place of the MAX6141EUR-T or MAX6150EUR-T?
The MAX6145EUR-T is not a direct replacement for MAX6141EUR-T (4.096V) or MAX6150EUR-T (5.0V), as each has a different preset output voltage. Swapping them would shift ADC full-scale range or bias points, requiring firmware and calibration updates. However, all three share identical pinout, package, dropout, and supply-current characteristics-so PCB layout is interchangeable if voltage requirements align.
What is the thermal hysteresis specification for the MAX6145EUR-T?
The MAX6145EUR-T has a thermal hysteresis of 80ppm maximum, as specified in the datasheet's Absolute Maximum Ratings and Typical Operating Characteristics sections. This value represents the residual output voltage shift after cycling between –40°C and +85°C twice, and is critical for applications requiring repeatable measurements after field temperature excursions-such as portable calibration tools or outdoor environmental monitors.
MAX6145EUR-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:
- 1 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- 30µVp-p
- Noise - 10Hz to 10kHz:
- 800µVp-p
- Voltage - Input:
- 4.7V ~ 12.6V
- Current - Supply:
- 130µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6145EUR-T FAQ
1.How can I place an order for MAX6145EUR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6145EUR-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 MAX6145EUR-T reliable?
The price and inventory of MAX6145EUR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6145EUR-T is usually 5 days.
3.What payment methods are accepted for MAX6145EUR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6145EUR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6145EUR-T?
MAX6145EUR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6145EUR-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 MAX6145EUR-T?
For technical support, including MAX6145EUR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6145EUR-T requirements.
6.How does Aetrix verify that MAX6145EUR-T is sourced from the original manufacturer or authorized distributors?
All MAX6145EUR-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 MAX6145EUR-T meets industry standards.
7.What is the process for return or replacement of MAX6145EUR-T?
All MAX6145EUR-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6145EUR-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 MAX6145EUR-T part is unused and in its original packaging.
Return procedure for MAX6145EUR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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