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Analog Devices Inc./Maxim Integrated MAX6125EUR-T
- Part No.:
- MAX6125EUR-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6125EUR-T.pdf
- Description:
- IC VREF SERIES 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,014
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Product details
Overview
The MAX6125EUR-T from Maxim Integrated is a 2.5V, low-dropout, micropower, three-terminal voltage reference in a 3-pin SOT23-3 package, featuring ±1% initial accuracy, 200mV dropout voltage, and 75μA supply current independent of input voltage-ideal for precision analog sensing and battery-powered data-acquisition systems.
For engineers reviewing the MAX6125EUR-T datasheet, MAX6125EUR-T pinout, MAX125EUR-T application, or MAX6125EUR-T equivalent, this device serves as a stable, low-quiescent-current reference for ADC/DAC biasing, portable instrumentation, and 3V/5V embedded power rails where thermal stability and load regulation under varying source conditions are critical.
Technical Context
The MAX6125EUR-T implements a bandgap-based reference core with internal trimming for ±1% output accuracy at +25°C and guaranteed 2.45V–2.55V over –40°C to +85°C. Its 15ppm/°C typical temperature coefficient (≤50ppm/°C max) ensures minimal drift across industrial temperature ranges.
It operates from 2.7V to 12.6V input, delivers up to 1mA output current, and maintains stability with capacitive loads up to 10nF-no output capacitor required. Line regulation is ≤50µV/V and load regulation is ≤1mV/mA when sourcing, enabling high-accuracy feedback in low-noise signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±1% at +25°C; 2.450V–2.550V over full temperature range-ensures consistent ADC reference scaling across operating conditions. |
| Dropout Voltage | 200mV at 1mA-supports operation from 2.7V input in 3V systems without headroom loss. |
| Supply Current | 75μA at +25°C, ≤130μA over –40°C to +85°C, independent of VIN-enables multi-year battery life in always-on sensors. |
| Tempco | 15ppm/°C typical, ≤50ppm/°C max-limits output drift to <±1.25mV over 85°C span for precision measurement. |
| Output Noise | 15µVP-P (0.1Hz–10Hz), 500µVP-P (10Hz–10kHz)-minimizes noise contribution in high-resolution 16-bit+ data acquisition. |
| Load Regulation | 0.4–1.0mV/mA sourcing, 1.15–10mV/mA sinking-maintains reference integrity during dynamic DAC or op-amp loading. |
| Line Regulation | 1–50µV/V-rejects input ripple and supply variation without external filtering. |
Pinout & Package
MAX6125EUR-T is housed in a RoHS-compliant 3-pin SOT23-3 package (JEDEC MO-178AA), with 1.3mm × 0.8mm footprint and 0.95mm height-compatible with standard high-density PCB assembly processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input Supply | Accepts 2.7V–12.6V; must be ≥ (VOUT + 200mV); bypass with 0.1µF ceramic for optimal line-transient response. |
| 2 (OUT) | Reference Output | Provides stable 2.5V output; drives up to 1mA; stable with 0–10nF capacitive load-no output capacitor required. |
| 3 (GND) | Analog Ground | Low-impedance return path; must be connected directly to system ground plane to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Low Dropout | 200mV at full 1mA load enables use in 3V systems with minimal input overhead. |
| Micropower Operation | 75μA quiescent current-reduces self-heating and extends battery life in portable devices. |
| Thermal Stability | ≤50ppm/°C max tempco ensures <±1.25mV total drift over –40°C to +85°C for repeatable calibration. |
| Capacitive Load Tolerance | Stable with 0–10nF output capacitance-eliminates need for output capacitor and simplifies layout. |
| Supply-Independent Current | IQ varies <6μA/V across input range-prevents reference error due to supply sag or ripple. |
Applications
| Battery-Powered Data Loggers | Portable Medical Sensors |
|---|---|
Use Scenario: Continuous 24/7 environmental monitoring using ultra-low-power microcontroller and 16-bit SAR ADC. IC Role / Device Role / Timing Role: Provides precise 2.5V reference for ADC conversion and sensor biasing, ensuring accurate voltage-to-digital mapping. Use Value: 75μA supply current and 200mV dropout extend coin-cell lifetime beyond 5 years; 15ppm/°C tempco maintains ±0.01% reading accuracy across field temperatures. | Use Scenario: Handheld pulse oximeter with analog front-end amplifying weak photodiode signals before digitization. IC Role / Device Role / Timing Role: Supplies clean, low-noise 2.5V reference to instrumentation amplifier and ADC reference inputs. Use Value: 15µVP-P (0.1–10Hz) noise floor prevents degradation of DC-coupled physiological signal resolution; SOT23-3 footprint saves space on compact PCB. |
| Industrial Process Transmitters | Smart Energy Meters |
Use Scenario: 4–20mA loop-powered transmitter measuring pressure or flow in factory automation. IC Role / Device Role / Timing Role: Reference source for DAC generating loop current and for internal ADC monitoring supply rail. Use Value: Guaranteed 2.45V–2.55V output over –40°C to +85°C ensures compliance with IEC 61000-6-2 immunity requirements; 50ppm/°C max tempco meets Class 0.1 accuracy standards. | Use Scenario: DIN-rail mounted electricity meter performing real-time energy calculation using metrology-grade ADCs. IC Role / Device Role / Timing Role: Primary voltage reference for polyphase energy measurement ICs requiring stable, low-drift excitation. Use Value: Thermal hysteresis ≤80ppm ensures repeatability after thermal cycling; no output capacitor needed simplifies conformal coating and long-term reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3025AIDBZR | 2.5V, ±0.2% initial accuracy, 50ppm/°C max tempco, 50μA IQ, SOT23-3-tighter initial tolerance but higher tempco than MAX6125EUR-T. | Preferred for factory-calibrated systems needing tighter initial accuracy; less suitable for wide-temperature uncalibrated field use. | Select REF3025AIDBZR when initial accuracy dominates over thermal drift; choose MAX6125EUR-T when long-term stability and micropower are prioritized. |
| ADR3425ARJZ-R7 | 2.5V, ±0.1% initial accuracy, 10ppm/°C max tempco, 120μA IQ, SOT23-5-superior tempco but higher supply current and 5-pin package. | Used where ultra-low drift is mandatory (e.g., laboratory instruments); requires PCB redesign due to extra pin and larger footprint. | Choose ADR3425ARJZ-R7 only if 10ppm/°C max tempco is non-negotiable; MAX6125EUR-T offers better power efficiency and drop-in SOT23-3 compatibility. |
Compared with REF3025AIDBZR and ADR3425ARJZ-R7, the MAX6125EUR-T delivers optimal balance of micropower operation (75μA), industrial-grade tempco (≤50ppm/°C), and true 3-pin SOT23-3 drop-in fit-making it the preferred choice for cost-sensitive, battery-constrained, and thermally variable embedded systems where moderate initial accuracy is acceptable.
Availability
MAX6125EUR-T is available at Aetrix Electronics and suitable for battery-powered data loggers, portable medical sensors, industrial process transmitters, smart energy meters, and precision instrumentation requiring stable component supply with guaranteed long-term continuity.
Supply support for MAX6125EUR-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, automotive, and communications applications.
The MAX61xx family was developed specifically for low-power, high-stability voltage referencing in portable and harsh-environment systems-emphasizing micropower consumption, low dropout, and robust thermal performance in miniature packages.
FAQ
What is the maximum input voltage rating for the MAX6125EUR-T?
The MAX6125EUR-T supports an absolute maximum input voltage of +13.5V relative to GND. Its recommended operating supply range is 2.7V to 12.6V. Exceeding 13.5V may cause permanent damage. The device requires a minimum input of (VOUT + 200mV), so for its 2.5V output, VIN must be ≥2.7V-making it fully compatible with standard 3V supply rails. This margin ensures reliable low-dropout operation across temperature and load variations.
Does the MAX6125EUR-T require an output capacitor for stability?
No, the MAX6125EUR-T does not require an output capacitor. It is explicitly designed to remain stable with capacitive loads ranging from 0nF to 10nF. This eliminates the need for external output capacitance in most applications, reducing BOM count and PCB area. If an output charge reservoir is needed-for example, to decouple a DAC's reference input-the total capacitive load must stay within the 10nF limit to preserve settling time and transient response performance specified in the MAX6125EUR-T datasheet.
What is the thermal hysteresis specification for the MAX6125EUR-T?
The MAX6125EUR-T has a thermal hysteresis of ≤80ppm, measured across multiple temperature cycles from –40°C to +85°C. This parameter quantifies the maximum residual output voltage shift after repeated thermal cycling-critical for applications requiring repeatable calibration over field life. Unlike tempco (which describes drift *during* temperature change), hysteresis reflects non-recoverable offset after thermal stress. The 80ppm value ensures long-term reference fidelity in cyclic environments such as outdoor industrial sensors or automotive cabin modules.
Can the MAX6125EUR-T drive a 1mA load continuously?
Yes, the MAX6125EUR-T is rated to source up to 1mA continuously while maintaining output accuracy within specifications. Its load regulation is specified as 0.4–1.0mV/mA when sourcing, and its dropout remains ≤200mV at 1mA. The device also supports sinking up to 1mA, with load regulation of 1.15–10mV/mA. These capabilities make the MAX6125EUR-T suitable for driving ADC reference inputs, op-amp bias networks, and small DAC loads without external buffering-provided input voltage remains ≥2.7V and ambient temperature stays within –40°C to +85°C.
Is the MAX6125EUR-T pin-compatible with other members of the MAX61xx family in SOT23-3?
Yes, the MAX6125EUR-T shares identical pinout (IN, OUT, GND) and package (SOT23-3) with MAX6141EUR-T, MAX6145EUR-T, and MAX6150EUR-T-enabling direct substitution in the same footprint when adjusting for different output voltages (4.096V, 4.5V, 5.0V). However, it is not pin-compatible with MAX6160EUS-T, which uses a 4-pin SOT143 package with ADJ pin. Board-level replacement among the 3-pin variants requires only firmware or calibration updates-not layout changes-making the MAX6125EUR-T ideal for scalable reference design across voltage tiers.
MAX6125EUR-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):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 1 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- 15µVp-p
- Noise - 10Hz to 10kHz:
- 500µVp-p
- Voltage - Input:
- 2.7V ~ 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
MAX6125EUR-T FAQ
1.How can I place an order for MAX6125EUR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6125EUR-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 MAX6125EUR-T reliable?
The price and inventory of MAX6125EUR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6125EUR-T is usually 5 days.
3.What payment methods are accepted for MAX6125EUR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6125EUR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6125EUR-T?
MAX6125EUR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6125EUR-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 MAX6125EUR-T?
For technical support, including MAX6125EUR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6125EUR-T requirements.
6.How does Aetrix verify that MAX6125EUR-T is sourced from the original manufacturer or authorized distributors?
All MAX6125EUR-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 MAX6125EUR-T meets industry standards.
7.What is the process for return or replacement of MAX6125EUR-T?
All MAX6125EUR-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6125EUR-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 MAX6125EUR-T part is unused and in its original packaging.
Return procedure for MAX6125EUR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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