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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:3,264
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Product details
Overview
MAX6125EUR+T from Maxim Integrated is a 2.5V, low-dropout (200mV), micropower (75µA typical) three-terminal voltage reference in SOT23-3 package, designed for precision analog signal conditioning and ADC/DAC biasing in battery-powered systems. It delivers ±1% initial accuracy, 15ppm/°C typical temperature coefficient, and stable operation with capacitive loads up to 10nF.
For engineers reviewing the MAX6125EUR+T datasheet, MAX6125EUR+T pinout, MAX6125EUR+T application, or MAX6125EUR+T equivalent, this device is selected for high-accuracy, low-quiescent-current voltage referencing in portable instrumentation, data-acquisition front-ends, and 3V/5V embedded sensor interfaces where supply headroom and thermal drift are critical constraints.
Technical Context
The MAX6125EUR+T employs a bandgap-based reference core with internal trimming for ±1% initial output tolerance at +25°C and guaranteed ≤50ppm/°C temperature coefficient over –40°C to +85°C. Its 200mV dropout enables regulation from VIN as low as 2.7V while maintaining 2.5V output.
Supply current remains stable across input voltage (2.7V–12.6V) and temperature, varying only 1.7–6µA/V and 75–130µA over full range. Output noise is 15µVP-P (0.1Hz–10Hz) and 500µVP-P (10Hz–10kHz), supporting high-resolution measurement circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±1% at +25°C; 2.450V–2.550V over –40°C to +85°C - ensures stable bias for 12-bit+ ADCs without recalibration |
| Dropout Voltage | 200mV at 1mA load - enables operation from 2.7V supply in 3V systems with margin |
| Quiescent Current | 75µA typical, ≤130µA over temperature - extends battery life in always-on sensor nodes |
| Tempco | 15ppm/°C typical, ≤50ppm/°C max - contributes ≤125ppm (0.0125%) error over 85°C span |
| Load Regulation | 0.4–1.0mV/mA sourcing - maintains <0.04% output shift under 1mA dynamic load changes |
| Line Regulation | 1–50µV/V - rejects input ripple better than 100dB up to low frequencies |
| Output Noise | 15µVP-P (0.1Hz–10Hz) - suitable for precision weigh-scale and medical front-ends |
Pinout & Package
MAX6125EUR+T is housed in a RoHS-compliant 3-pin SOT23-3 package (JEDEC MO-178AB), with 1.3mm × 0.8mm footprint and 0.95mm height. Pin 1 = IN, Pin 2 = OUT, Pin 3 = GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 2.7V–12.6V; must be ≥ (VOUT + 200mV) for regulation; decoupling with 0.1µF ceramic recommended |
| 2 (OUT) | Stable 2.5V reference output | Source/sink capable up to ±1mA; stable with 0–10nF capacitive load; no external capacitor required |
| 3 (GND) | Analog ground reference | Low-impedance return path; must be connected directly to system AGND plane to minimize noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout (200mV) | Enables use in 3V battery systems down to ~2.7V cutoff without loss of regulation |
| Micropower operation (75µA) | Reduces average current draw in sleep-mode data loggers to sub-100µA system level |
| Capacitive-load stability (0–10nF) | Eliminates need for output capacitor, simplifying layout and avoiding phase-margin risks |
| Supply-current independence | IQ varies <6µA/V across input range - prevents gain error in ratiometric sensor bridges |
| Thermal hysteresis (80ppm) | Limits repeatability error after thermal cycling - critical for calibration-critical test equipment |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
|
Use Scenario: Battery-powered environmental monitor logging temperature, humidity, and pressure every 10 seconds using 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Provides stable 2.5V reference for ADC and analog front-end op-amps. Use Value: 15ppm/°C tempco and 75µA IQ enable >1-year battery life with <0.02% full-scale drift over operating temperature. |
Use Scenario: 4–20mA loop-powered transmitter converting RTD resistance to current with HART modulation. IC Role / Device Role / Timing Role: Supplies precise excitation voltage for RTD bridge and reference for DAC current-setting circuit. Use Value: 200mV dropout allows operation from 3.3V LDO rail; ±1% initial accuracy eliminates factory trim step. |
| Handheld Medical Instruments | Test & Measurement Front-Ends |
|
Use Scenario: Portable ECG device acquiring biopotential signals with 24-bit ADC and real-time digital filtering. IC Role / Device Role / Timing Role: Reference for ADC and bias generator for instrumentation amplifiers. Use Value: 15µVP-P (0.1Hz–10Hz) noise ensures <1µV RMS baseline noise floor, preserving diagnostic signal integrity. |
Use Scenario: Benchtop multimeter with autoranging, auto-zero, and 6½-digit resolution. IC Role / Device Role / Timing Role: Primary voltage reference for DMM's internal ADC and calibration subsystem. Use Value: 80ppm thermal hysteresis and ≤50ppm/°C tempco support NIST-traceable calibration stability over repeated thermal cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3025AIDBVR | 2.5V, 50ppm/°C max, 50µA IQ, SOT23-3 - lower quiescent current but higher tempco guarantee | Suitable for ultra-low-power IoT nodes where tempco relaxation is acceptable | Select REF3025AIDBVR when <50µA IQ is mandatory and ±0.05% total error budget allows higher drift |
| ADR3425ARJZ-R7 | 2.5V, 10ppm/°C max, 120µA IQ, SOT23-3 - tighter tempco but 60% higher supply current | Better for lab-grade instruments requiring <25ppm total drift over 0–70°C | Select ADR3425ARJZ-R7 when long-term stability and low hysteresis outweigh battery-life concerns |
Compared with MAX6125EUR+T, REF3025AIDBVR trades 25ppm/°C tighter tempco spec for 25µA lower IQ, while ADR3425ARJZ-R7 achieves 5ppm/°C better tempco at cost of 45µA higher IQ - making MAX6125EUR+T the optimal balance for industrial portable devices needing both low power and moderate precision.
Availability
MAX6125EUR+T is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered data acquisition, and industrial sensor interface designs requiring stable component supply with full traceability and lifecycle 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, medical, and communications applications.
The MAX61xx family was developed specifically for low-power, high-accuracy voltage referencing in space-constrained, battery-operated systems where dropout, quiescent current, and thermal stability are co-optimized.
FAQ
What is the maximum input voltage rating for MAX6125EUR+T?
The absolute maximum input voltage for MAX6125EUR+T is +13.5V relative to GND. However, the recommended operating range is 2.7V to 12.6V. Exceeding 12.6V may degrade long-term reliability or cause parametric shift, even if within absolute maximum ratings. Always maintain VIN ≥ (VOUT + 200mV) = 2.7V for proper regulation. The MAX6125EUR+T datasheet specifies continuous operation up to 12.6V at full temperature range.
Can MAX6125EUR+T drive a 10nF capacitive load without oscillation?
Yes, MAX6125EUR+T is explicitly characterized and guaranteed stable with capacitive loads from 0nF to 10nF - no external compensation or series resistance is required. This capability eliminates output capacitor dependencies in DAC reference buffers and simplifies PCB layout. The stability margin is verified across –40°C to +85°C and full load range. This behavior is intrinsic to the MAX6125EUR+T internal architecture and confirmed in the Typical Operating Characteristics section of its datasheet.
What is the thermal hysteresis specification for MAX6125EUR+T?
The thermal hysteresis for MAX6125EUR+T is specified as 80ppm, measured over multiple temperature cycles from –40°C to +85°C and back. This value represents the maximum residual output voltage shift after thermal cycling, independent of temperature coefficient. It directly impacts repeatability in field-deployed equipment subject to ambient cycling. The 80ppm hysteresis is a guaranteed maximum per the MAX6125EUR+T datasheet and applies to all units in the SOT23-3 package variant.
Does MAX6125EUR+T require an input bypass capacitor?
A 0.1µF ceramic capacitor is recommended at the IN pin of MAX6125EUR+T for optimal line-transient response, especially in noisy supply environments. While not strictly required for DC regulation, omitting it degrades PSRR above 10kHz and increases output perturbation during input voltage steps. The capacitor must be placed as close as possible to the IN and GND pins. This recommendation is validated in the MAX6125EUR+T Typical Operating Circuit and Line-Transient Response plots.
How does load regulation behave when sinking current from MAX6125EUR+T?
When sinking up to 1mA, MAX6125EUR+T exhibits load regulation of 1.15–10mV/mA, meaning output voltage drops by that amount per mA drawn from the OUT pin. This is higher than sourcing regulation (0.4–1.0mV/mA) due to internal transistor topology. For applications requiring bidirectional current handling - such as driving transmission gates or active filters - this asymmetry must be accounted for in error budgeting. The exact value depends on temperature and is specified in the Electrical Characteristics table for MAX6125EUR+T.
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:
- Active
- 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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