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Analog Devices Inc./Maxim Integrated MAX6037CAUK25-T
- Part No.:
- MAX6037CAUK25-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6037CAUK25-T.pdf
- Description:
- LOW-POWER, FIXED REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MAX6037CAUK25-T from Maxim Integrated is a precision, low-dropout, micropower voltage reference with fixed 2.5V output, ±0.5% initial accuracy, 50ppm/°C max temperature coefficient, 100mV max dropout at 1mA, and active-low shutdown consuming ≤500nA. It operates from 2.7V to 5.5V supply and delivers ±5mA load current-ideal for high-accuracy ADC/DAC biasing in battery-powered portable instrumentation.
For engineers reviewing the MAX6037CAUK25-T datasheet, MAX6037CAUK25-T pinout, MAX6037CAUK25-T application, or MAX6037CAUK25-T equivalent, key selection criteria include its automotive-grade (-40°C to +125°C) operation, SOT23-5 package footprint, 0.02µF–1µF capacitive-load stability, and shutdown-controlled power sequencing in space-constrained analog front-ends.
Technical Context
The MAX6037CAUK25-T is a series-mode bandgap voltage reference with internal trimming for fixed 2.5V output. Its architecture enables stable regulation across input voltages ≥2.7V while maintaining low quiescent current (210–275µA) and minimal line/load regulation (≤0.012%/V and ≤0.2%/mA).
Shutdown is implemented via an active-low logic input (SHDN), which disables the output and reduces supply current to ≤500nA. The device features rail-to-rail sourcing/sinking capability (±5mA), low thermal hysteresis (514ppm), and long-term stability of 133ppm over 1000 hours-critical for calibration-critical systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±0.5% (2.4875V to 2.5125V at +25°C) - ensures accurate full-scale reference for 12-bit+ data converters |
| Tempco | ≤50ppm/°C - limits drift to <±625µV over -40°C to +125°C, supporting automotive sensor signal chains |
| Dropout Voltage | ≤100mV at 1mA load - enables operation from 2.7V supply while maintaining regulation, critical for single-cell Li-ion systems |
| Quiescent Current | 210–275µA - balances low power with fast turn-on settling (2.2ms), suitable for duty-cycled precision sensors |
| Shutdown Current | ≤500nA - reduces system standby power by >400×, enabling multi-year battery life in IoT endpoints |
| Load Drive | ±5mA sourcing/sinking - directly drives ADC reference inputs, op-amp feedback networks, and small DAC loads without buffering |
| Capacitive Stability | 0.02µF to 1µF output capacitor - supports ceramic MLCCs for compact, low-ESR filtering in portable designs |
Pinout & Package
The MAX6037CAUK25-T is housed in a 5-pin SOT23-5 package (U5-2 code, top mark AEJG), with exposed pad not electrically connected. Pin 1 is ADJ (internally connected, no external connection required for fixed-output variants); pins 2–5 are GND, SHDN, IN, and OUT respectively.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (ADJ) | Adjustment Input | Internally connected for fixed-output variants like MAX6037CAUK25-T; must remain unconnected per datasheet |
| 2 (GND) | Analog Ground | Primary return path for reference output and internal bandgap circuitry; requires low-impedance PCB connection |
| 3 (SHDN) | Active-Low Shutdown Control | Pull ≤0.75V to disable output and reduce supply current to ≤500nA; tie to IN for always-on operation |
| 4 (IN) | Supply Input | Accepts 2.7V–5.5V; requires 0.1µF bypass capacitor to GND close to pin for noise immunity and transient response |
| 5 (OUT) | Reference Output | Delivers regulated 2.5V; connects to 0.02µF–1µF capacitor to GND for stability and low-noise performance |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.5V Output | Factory-trimmed for ±0.5% accuracy at +25°C, eliminating external resistor networks and reducing BOM count |
| Automotive Temperature Range | Guaranteed operation from -40°C to +125°C - qualified for under-hood and industrial control applications |
| Low Dropout | 100mV max at 1mA enables use with low-headroom supplies (e.g., 2.7V LDO outputs), preserving system efficiency |
| Shutdown Mode | Active-low control reduces supply current to ≤500nA, enabling precise power gating in energy-harvesting systems |
| High Load Drive | ±5mA sourcing/sinking capability eliminates need for external buffer amplifiers when driving ADC references or sensor excitation |
| Noise Performance | 14µVP-P (0.1Hz–10Hz) and 30µVRMS (10Hz–1kHz) - supports high-resolution (≥16-bit) measurement systems |
Applications
| Portable Medical Sensors | Industrial Data Acquisition |
|---|---|
|
Use Scenario: Battery-powered ECG front-end with 16-bit SAR ADC requiring stable reference during motion-induced supply ripple. IC Role / Device Role / Timing Role: Precision 2.5V reference for ADC full-scale calibration and analog signal conditioning. Use Value: 50ppm/°C tempco and 100mV dropout ensure <±1 LSB error across temperature and battery discharge, extending clinical-grade accuracy. |
Use Scenario: Modular PLC analog input module measuring 4–20mA current loops with cold-junction compensation. IC Role / Device Role / Timing Role: Stable reference for precision current-to-voltage conversion and thermocouple amplifier gain setting. Use Value: ±5mA drive capability directly biases transimpedance amplifiers and RTD bridges, reducing component count and layout area. |
| Wireless Sensor Nodes | Automotive Cabin Monitoring |
|
Use Scenario: LoRaWAN node with ultra-low-power microcontroller and MEMS pressure sensor sampling every 5 minutes. IC Role / Device Role / Timing Role: Reference source for sensor ADC and internal VREF monitoring during deep-sleep wake-up cycles. Use Value: ≤500nA shutdown current minimizes quiescent drain, enabling 10+ year battery life with CR2032 cells. |
Use Scenario: In-cabin air quality sensor using NDIR CO₂ detection with temperature-compensated optical path. IC Role / Device Role / Timing Role: Reference for photodiode TIA and microcontroller ADC used in real-time gas concentration calculation. Use Value: -40°C to +125°C qualification and 514ppm thermal hysteresis ensure repeatable calibration across vehicle thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3425ARJZ-R7 | 2.5V, ±0.1% initial accuracy, 3 ppm/°C max tempco, 300µA quiescent current, SOT23-5 | Higher precision and lower drift, but no shutdown function and higher supply current | Select for metrology-grade accuracy where shutdown is unnecessary and tighter tempco is critical |
| REF3025AIDBZR | 2.5V, ±0.2% initial accuracy, 50ppm/°C max tempco, 50µA quiescent current, SOT23-3 | Lower quiescent current but no shutdown and only 3-pin SOT23 (no SHDN pin), limited to simpler on/off control | Select for ultra-low-power always-on applications where shutdown control is not required and board space is constrained |
Compared with ADR3425ARJZ-R7 and REF3025AIDBZR, the MAX6037CAUK25-T uniquely combines automotive temperature range, integrated shutdown, and ±5mA drive in a 5-pin SOT23-making it optimal for battery-powered systems needing both precision and controllable power states.
Availability
MAX6037CAUK25-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial data acquisition modules, wireless sensor nodes, and automotive cabin monitoring systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6037CAUK25-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 and mixed-signal ICs for demanding industrial, automotive, and medical applications, emphasizing low power, high accuracy, and robust reliability.
The MAX6037 family was engineered specifically for micropower, high-accuracy voltage referencing in space- and energy-constrained systems-delivering fixed and adjustable outputs with shutdown in miniature SOT23 packages.
FAQ
What is the output voltage tolerance and temperature coefficient of the MAX6037CAUK25-T?
The MAX6037CAUK25-T provides a nominal 2.500V output with ±0.5% initial accuracy (2.4875V to 2.5125V at +25°C) and a maximum temperature coefficient of 50ppm/°C. This ensures total output variation remains within ±1250ppm (±3.125mV) over the full -40°C to +125°C operating range, meeting requirements for 12-bit precision systems.
Does the MAX6037CAUK25-T require an external capacitor on the output pin?
Yes, the MAX6037CAUK25-T requires an output capacitor between OUT and GND in the range of 0.02µF to 1µF for stability. Ceramic capacitors are recommended due to their low ESR; values near 0.1µF provide optimal noise suppression and transient response. Omitting this capacitor may cause oscillation or degraded load regulation.
Can the MAX6037CAUK25-T be used with a 2.5V supply?
No-the MAX6037CAUK25-T requires a minimum supply voltage of 2.7V (as specified in the MAX6037_25 electrical characteristics table) to maintain regulation at 2.5V output. At 2.5V input, the device enters dropout and cannot sustain rated accuracy or load current; a minimum headroom of 200mV is required.
What is the shutdown behavior of the MAX6037CAUK25-T, and how is it controlled?
The MAX6037CAUK25-T features an active-low shutdown input (SHDN, Pin 3). Pulling SHDN ≤0.75V disables the output and reduces quiescent current to ≤500nA (typically 50pA). To enable normal operation, connect SHDN to the IN supply rail. The output settles to 0.1% of final value in 2.2ms after SHDN is pulled high.
Is the ADJ pin used in the MAX6037CAUK25-T, and how should it be handled?
No-the ADJ pin (Pin 1) is internally connected and unused in fixed-output variants like the MAX6037CAUK25-T. The datasheet explicitly states "Do not connect anything to this pin." Leaving it floating or connecting it to GND/IN will compromise performance or damage the device; it must remain unconnected and unstubbed on the PCB.
MAX6037CAUK25-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- 14µVp-p
- Noise - 10Hz to 10kHz:
- 30µVrms
- Voltage - Input:
- 2.7V ~ 5.5V
- Current - Supply:
- 275µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6037CAUK25-T FAQ
1.How can I place an order for MAX6037CAUK25-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6037CAUK25-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 MAX6037CAUK25-T reliable?
The price and inventory of MAX6037CAUK25-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6037CAUK25-T is usually 5 days.
3.What payment methods are accepted for MAX6037CAUK25-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6037CAUK25-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6037CAUK25-T?
MAX6037CAUK25-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6037CAUK25-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 MAX6037CAUK25-T?
For technical support, including MAX6037CAUK25-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6037CAUK25-T requirements.
6.How does Aetrix verify that MAX6037CAUK25-T is sourced from the original manufacturer or authorized distributors?
All MAX6037CAUK25-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 MAX6037CAUK25-T meets industry standards.
7.What is the process for return or replacement of MAX6037CAUK25-T?
All MAX6037CAUK25-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6037CAUK25-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 MAX6037CAUK25-T part is unused and in its original packaging.
Return procedure for MAX6037CAUK25-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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