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Analog Devices Inc./Maxim Integrated MAX6037CAUK12-T
- Part No.:
- MAX6037CAUK12-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6037CAUK12-T.pdf
- Description:
- LOW-POWER, FIXED REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:4,925
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Product details
Overview
MAX6037CAUK12-T from Maxim Integrated is a low-dropout, micropower voltage reference IC with fixed 1.25V output, ±0.5% initial accuracy, 50ppm/°C max temperature coefficient, 100mV max dropout at 1mA, and active-low shutdown consuming ≤500nA. It operates from 2.5V to 5.5V supply and delivers ±5mA load current, serving as a precision reference in battery-powered medical sensors and portable instrumentation.
For engineers reviewing the MAX6037CAUK12-T datasheet, MAX6037CAUK12-T pinout, MAX6037CAUK12-T application, or MAX6037CAUK12-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 logic compatibility with 0.7V low / 2.0V high thresholds.
Technical Context
The MAX6037CAUK12-T is a series-mode bandgap voltage reference with internal trimming for fixed 1.25V output. Its architecture supports stable regulation under varying input voltage (2.5V–5.5V) and load conditions (±5mA), with line regulation ≤0.0096%/V and load regulation ≤0.12%/mA across temperature.
Shutdown is implemented via an active-low SHDN pin that disables the output and reduces quiescent current to ≤500nA; the device exhibits >10MΩ output impedance when disabled and requires no external components for basic operation beyond a 0.02µF–1µF output capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.25V with ±0.5% initial accuracy at +25°C - ensures predictable ADC/DAC biasing without calibration. |
| Temperature Coefficient | ≤50ppm/°C - limits output drift to <63µV over -40°C to +125°C, critical for automotive sensor front-ends. |
| Dropout Voltage | ≤100mV at 1mA load - enables operation from 1.35V supply, supporting ultra-low-voltage battery systems. |
| Quiescent Current | ≤275µA - minimizes standby power in always-on portable devices like pulse oximeters. |
| Shutdown Current | ≤500nA - extends shelf life and runtime in intermittently powered IoT edge nodes. |
| Capacitive Load Range | 0.02µF to 1µF - accommodates standard ceramic decoupling without oscillation risk. |
| Supply Voltage Range | 2.5V to 5.5V - compatible with single Li-ion, dual alkaline, or regulated 3.3V/5V rails. |
Pinout & Package
The MAX6037CAUK12-T is housed in a 5-pin SOT23-5 package (U5-2 code, top mark AEIX), with exposed pad not electrically connected. Pin 1 is ADJ (internally connected, no external connection required); pins 2–5 are GND, SHDN, IN, and OUT respectively.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (ADJ) | Adjustment terminal | Internally connected for fixed-output variants - must remain unconnected; not used in MAX6037CAUK12-T. |
| 2 (GND) | Ground reference | Primary return path for reference output and supply current; requires low-impedance PCB connection. |
| 3 (SHDN) | Active-low enable control | Pull ≤0.7V to disable output; tie to IN (≥2.5V) for normal operation; sinks ≤1000nA in either state. |
| 4 (IN) | Power input | Accepts 2.5V–5.5V supply; bypass with 0.1µF ceramic capacitor to GND for noise immunity. |
| 5 (OUT) | Reference voltage output | Delivers stable 1.25V ±0.5%; connect 0.02µF–1µF capacitor to GND for transient stability. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive temperature range | Specified from -40°C to +125°C - qualified for under-hood and industrial control applications. |
| Low dropout voltage | 100mV max at 1mA - enables use with depleted batteries or low-headroom LDO outputs. |
| High load drive capability | ±5mA sourcing/sinking - eliminates need for external buffer in 12-bit SAR ADC reference circuits. |
| Ultra-low shutdown current | 500nA max - reduces annual standby drain to <4.4µAh, extending 10-year battery life. |
| Capacitor-stable operation | Stable with 0.02µF–1µF output capacitance - supports compact 0201/0402 MLCCs without phase-margin tuning. |
Applications
| Medical Sensor Front-End | Portable Data Logger |
|---|---|
Use Scenario: Precision analog signal conditioning in handheld ECG monitors with single-cell Li-ion supply. IC Role / Device Role / Timing Role: Provides stable 1.25V reference for 16-bit delta-sigma ADC converting biopotential signals. Use Value: ±0.5% initial accuracy and 50ppm/°C TC ensure <0.01% total error over operating temperature, meeting IEC 60601-2-27 clinical accuracy requirements. |
Use Scenario: Battery-operated environmental sensor node logging temperature/humidity every 5 minutes. IC Role / Device Role / Timing Role: Supplies reference voltage to microcontroller's internal ADC during brief wake-up bursts. Use Value: 500nA shutdown current extends CR2032 battery life beyond 5 years while maintaining fast 75µs turn-on settling. |
| Automotive Cabin Controller | Wireless Sensor Transmitter |
Use Scenario: HVAC control module requiring reliable reference across engine-off (-40°C) to cabin-hot (+85°C) conditions. IC Role / Device Role / Timing Role: Reference source for thermistor-based temperature measurement circuitry. Use Value: -40°C to +125°C qualification and 50ppm/°C TC guarantee <±1.25mV output variation, enabling ±0.1°C thermal resolution. |
Use Scenario: Zigbee/Thread endpoint transmitting soil moisture data using coin-cell battery. IC Role / Device Role / Timing Role: Reference for low-power SAR ADC sampling resistive sensor bridges. Use Value: 100mV dropout allows operation down to 1.35V supply, extracting full energy from aging 1.5V alkaline cells. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6029ASA25+T | Fixed 2.5V output, ±0.2% initial accuracy, 25ppm/°C TC, same SOT23-5 package. | Higher output voltage limits use in 1.8V/2.5V domain; tighter accuracy suits metrology-grade designs. | Select when 2.5V reference is acceptable and higher precision justifies cost premium. |
| ADR3412ARJZ-R7 | Fixed 1.2V output, ±0.1% initial accuracy, 30ppm/°C TC, 150µA quiescent current, SOT23-5. | Lower output voltage incompatible with 1.25V ADC references; superior TC and accuracy for high-end instrumentation. | Choose only if system design permits 1.2V reference and demands sub-30ppm/°C stability. |
Compared with MAX6037CAUK12-T, MAX6029ASA25+T offers better accuracy and TC but at 2.5V output, while ADR3412ARJZ-R7 provides tighter specs at 1.2V - neither is pin-compatible, and both require layout revision for voltage-level adaptation.
Availability
MAX6037CAUK12-T is available at Aetrix Electronics and suitable for medical equipment, portable instrumentation, and automotive cabin controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6037CAUK12-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.
The MAX6037 family targets battery-powered and automotive systems needing micropower, high-accuracy voltage references with shutdown - optimized for space-constrained SOT23-5 layouts and wide-temperature reliability.
FAQ
What is the output voltage tolerance of MAX6037CAUK12-T over temperature?
The MAX6037CAUK12-T has a maximum output voltage tolerance of ±0.5% at +25°C and a temperature coefficient of ≤50ppm/°C. Over the full -40°C to +125°C range, total output deviation remains within ±0.75% due to combined initial error and thermal drift - verified per the "box method" per datasheet Note 2. This performance is guaranteed for the C-grade variant.
Can MAX6037CAUK12-T be used with a 1.8V supply?
No. The MAX6037CAUK12-T requires a minimum supply voltage of 2.5V, as specified in its absolute maximum ratings and electrical characteristics tables. At 1.8V, the device will not regulate - the dropout specification (100mV max at 1mA) assumes VIN ≥ VOUT + dropout, so 1.25V + 0.1V = 1.35V minimum is insufficient; the 2.5V lower limit ensures proper bandgap core biasing and shutdown logic functionality.
What is the recommended output capacitor for MAX6037CAUK12-T?
The MAX6037CAUK12-T is stable with output capacitance from 0.02µF to 1µF, as confirmed in the Capacitive-Load Stability parameter (COUT = 0.02µF to 1µF). A 0.1µF X7R ceramic capacitor placed close to the OUT and GND pins is recommended for general-purpose use, balancing transient response and board area. Larger values (up to 1µF) improve low-frequency PSRR but increase turn-on time.
Does MAX6037CAUK12-T support adjustable output configurations?
No. The MAX6037CAUK12-T is a fixed-output variant delivering 1.25V; only the MAX6037_ADJ part number supports adjustable output via an external resistor divider. Pin 1 (ADJ) on MAX6037CAUK12-T is internally connected and must remain unconnected - attempting to attach external components may damage the device or violate specifications.
How does shutdown functionality affect output impedance in MAX6037CAUK12-T?
When the SHDN pin is pulled low, the MAX6037CAUK12-T disables its reference core and presents >10MΩ output impedance (per ADJ variant characterization, applicable to all family members), effectively isolating the OUT pin. This high-Z state prevents loading of downstream circuits during sleep mode and eliminates reverse current paths, preserving battery charge in always-connected sensor nodes.
MAX6037CAUK12-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):
- 1.25V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- 6µVp-p
- Noise - 10Hz to 10kHz:
- 15µVrms
- Voltage - Input:
- 2.5V ~ 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
MAX6037CAUK12-T FAQ
1.How can I place an order for MAX6037CAUK12-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6037CAUK12-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 MAX6037CAUK12-T reliable?
The price and inventory of MAX6037CAUK12-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6037CAUK12-T is usually 5 days.
3.What payment methods are accepted for MAX6037CAUK12-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6037CAUK12-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6037CAUK12-T?
MAX6037CAUK12-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6037CAUK12-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 MAX6037CAUK12-T?
For technical support, including MAX6037CAUK12-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6037CAUK12-T requirements.
6.How does Aetrix verify that MAX6037CAUK12-T is sourced from the original manufacturer or authorized distributors?
All MAX6037CAUK12-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 MAX6037CAUK12-T meets industry standards.
7.What is the process for return or replacement of MAX6037CAUK12-T?
All MAX6037CAUK12-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6037CAUK12-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 MAX6037CAUK12-T part is unused and in its original packaging.
Return procedure for MAX6037CAUK12-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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