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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:2,853
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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, 200mV dropout at 1mA load, and 79µA typical supply current independent of input voltage. It operates from 4.7V to 12.6V input and delivers stable 4.5V output for high-resolution ADCs and battery-powered instrumentation.
For engineers reviewing the MAX6145EUR+T datasheet, MAX6145EUR+T pinout, MAX145EUR+T application, or MAX6145EUR+T equivalent, this page provides verified pin mapping, thermal hysteresis (80ppm), load regulation (0.6–1.8 mV/mA), noise performance (30µVP-P @ 0.1–10Hz), and real-world substitution guidance for industrial and portable designs.
Technical Context
The MAX6145EUR+T uses a bandgap-based reference core with internal trimming for ±1% initial accuracy over –40°C to +85°C. Its 200mV dropout enables operation from 4.7V input in 5V systems while maintaining regulation down to VOUT + 200mV.
Supply current remains stable across input voltage (79µA typ., 130µA max) and temperature, eliminating battery drain variation seen in two-terminal references. Output is stable with capacitive loads up to 10nF without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.500V ±0.045V at +25°C; ±0.09V over –40°C to +85°C - ensures ADC full-scale accuracy in data acquisition |
| Initial Accuracy | ±1% - eliminates need for system-level calibration in mid-precision applications |
| Tempco | 15ppm/°C typ., ≤50ppm/°C max - supports <±0.02% output drift over industrial temperature range |
| Dropout Voltage | 200mV at 1mA - enables reliable operation from 4.7V rails in 5V systems |
| Supply Current | 79µA typ., 130µA max - ultra-low quiescent draw extends battery life in portable equipment |
| Line Regulation | 2µV/V typ. - maintains output stability despite input rail fluctuations |
| Noise (0.1–10Hz) | 30µVP-P - minimizes quantization error in 16-bit+ SAR ADC references |
Pinout & Package
MAX6145EUR+T is housed in a RoHS-compliant 3-pin SOT23-3 package (JEDEC MO-178AA), footprint-compatible with industry-standard SOT-23 layouts. Pin 1 = IN, Pin 2 = OUT, Pin 3 = GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 4.7V–12.6V; must be ≥ VOUT + 200mV for regulation |
| 2 (OUT) | Precision reference output | Delivers 4.5V ±1% with low noise and high PSRR; drives ≤1mA load |
| 3 (GND) | Analog ground reference | Must be connected to clean system ground; separates reference return from power return paths |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout (200mV) | Enables use in 5V systems with minimal headroom; avoids need for higher input rails |
| Supply current independence | 79µA remains constant across 4.7–12.6V input - simplifies battery-life estimation |
| Capacitive load stability | Stable with 0–10nF output capacitance - eliminates mandatory output capacitor in most designs |
| Thermal hysteresis | 80ppm - ensures repeatable output after thermal cycling in field-deployed instruments |
| PSRR >80dB @ 1kHz | Rejects switching noise from adjacent DC/DC converters in mixed-signal PCBs |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental sensor node logging temperature/humidity at 10s intervals for 5+ years. IC Role / Device Role / Timing Role: Provides stable 4.5V reference for 16-bit sigma-delta ADC measuring RTD/thermistor bridges. Use Value: 79µA supply current and 200mV dropout extend coin-cell lifetime; ±1% accuracy avoids per-unit calibration. | Use Scenario: 4–20mA loop-powered transmitter with HART modulation in hazardous-area process control. IC Role / Device Role / Timing Role: Supplies precision reference for DAC generating analog output and for internal ADC monitoring supply rail. Use Value: 50ppm/°C tempco ensures <±0.1% span error over –40°C to +85°C ambient; stable with 10nF load accommodates HART coupling caps. |
| Handheld Multimeters | Medical Patient Monitors |
Use Scenario: Autoranging DMM with dual-slope integrator requiring low-noise, drift-stable reference. IC Role / Device Role / Timing Role: Reference source for integrating ADC and auto-zero amplifier during measurement cycles. Use Value: 30µVP-P (0.1–10Hz) noise prevents digit flicker; 80ppm thermal hysteresis prevents zero-drift after on/off cycling. | Use Scenario: Portable ECG module acquiring microvolt-level biopotentials with 24-bit resolution. IC Role / Device Role / Timing Role: Reference for high-PSRR PGA and SAR ADC front-end; powers analog bias networks. Use Value: >80dB PSRR suppresses digital switching noise from MCU; 130µA max IQ meets IEC 60601 standby power limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3045AIDBZR | 4.5V fixed output, 50ppm/°C max tempco, 50µA IQ, SOT23-3 - lower quiescent current but wider tempco tolerance | Preferred where ultra-low power dominates over thermal stability (e.g., energy-harvesting sensors) | Select REF3045AIDBZR only if <50µA supply current is mandatory and thermal drift budget allows 50ppm/°C worst-case |
| ADR3445ARJZ-R7 | 4.5V output, 10ppm/°C max tempco, 120µA IQ, SOT23-5 - tighter tempco but higher current and 5-pin package | Suitable when <10ppm/°C drift is required and board space allows 5-pin layout | Choose ADR3445ARJZ-R7 only if system-level drift specification demands <10ppm/°C and 120µA IQ is acceptable |
Compared with MAX6145EUR+T, REF3045AIDBZR trades 29µA lower IQ for looser thermal stability, while ADR3445ARJZ-R7 improves tempco by 4× at the cost of 41µA higher IQ and incompatible pinout - making MAX6145EUR+T the optimal balance for 4.5V industrial references needing SOT23-3 compatibility, 200mV dropout, and proven 50ppm/°C guarantee.
Availability
MAX6145EUR+T is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and handheld test equipment requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
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 targets low-power, high-accuracy voltage references for battery-operated and space-constrained systems where dropout, noise, and thermal stability directly impact measurement integrity.
FAQ
What is the guaranteed temperature coefficient specification for MAX6145EUR+T over its full operating range?
The MAX6145EUR+T guarantees a maximum temperature coefficient of 50ppm/°C over the full –40°C to +85°C operating range, with typical performance at 15ppm/°C. This specification is validated across production lots and ensures predictable output drift in industrial environments where ambient temperature varies widely. The MAX6145EUR+T achieves this via laser-trimmed bandgap circuitry and on-chip thermal compensation networks.
Can MAX6145EUR+T operate from a 4.2V lithium-ion battery without dropout?
No - MAX6145EUR+T requires a minimum input voltage of 4.7V for guaranteed regulation at 4.5V output, due to its 200mV dropout specification. At 4.2V input, the device enters dropout and output voltage will fall linearly with input. For single-cell Li-ion applications, consider the MAX6141EUR+T (4.096V output, 4.3V min input) or a buck-boost regulator feeding a higher-input reference.
Does MAX6145EUR+T require an output capacitor for stability?
No - MAX6145EUR+T is internally compensated and stable with capacitive loads from 0nF to 10nF. An output capacitor is unnecessary and may degrade transient response. If used for charge reservoir purposes (e.g., decoupling a DAC input), total output capacitance must not exceed 10nF to maintain specified settling time and avoid peaking.
What is the maximum load current that MAX6145EUR+T can source while maintaining output accuracy?
MAX6145EUR+T is specified to maintain output accuracy up to 1mA source current, with load regulation of 0.6–1.8 mV/mA. Beyond 1mA, output voltage deviation increases nonlinearly and is not guaranteed. For higher-current applications, use an op-amp buffer stage or select a reference with integrated buffer (e.g., MAX6070 series).
How does the supply current of MAX6145EUR+T behave across input voltage and temperature?
MAX6145EUR+T exhibits supply current independence: typical IQ is 79µA at +25°C and remains within 75–130µA across 4.7–12.6V input and –40°C to +85°C. This behavior is confirmed by design - unlike two-terminal references, its three-terminal architecture isolates supply current from VIN variations, enabling accurate battery-life modeling in portable systems.
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:
- Active
- 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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