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Analog Devices Inc./Maxim Integrated MAX6037CAUK12
- Part No.:
- MAX6037CAUK12
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6037CAUK12.pdf
- Description:
- LOW-POWER, FIXED REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:278
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Product details
Overview
MAX6037CAUK12 from Maxim Integrated is a precision 1.25V fixed-output, low-dropout series voltage reference with active-low shutdown, ±0.5% initial accuracy, 50ppm/°C max temperature coefficient, 100mV max dropout at 1mA, and 275µA max quiescent current-designed for high-accuracy analog sensing in automotive-grade portable instrumentation.
For engineers reviewing the MAX6037CAUK12 datasheet, MAX6037CAUK12 pinout, MAX6037CAUK12 application, or MAX6037CAUK12 equivalent, this page delivers verified electrical specs, SOT23-5 terminal mapping, automotive temperature range (-40°C to +125°C) validation, and real-world design trade-offs versus comparable references.
Technical Context
The MAX6037CAUK12 operates as a series-mode bandgap reference with internal trimming for 1.25V output, featuring an active-low SHDN input that reduces supply current to ≤500nA when asserted. Its architecture supports stable operation with capacitive loads from 0.02µF to 1µF without external compensation.
It delivers 5mA sink/source capability while maintaining output regulation across 2.5V–5.5V input voltage range and exhibits low thermal hysteresis (≤501ppm) and long-term stability (133ppm over 1000h), making it suitable for systems requiring repeatable calibration over life and temperature cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.25V ±0.5% (max initial error at +25°C; ensures ADC reference accuracy within 12-bit LSB tolerance) |
| Tempco | 50ppm/°C max (output drift ≤625µV over -40°C to +125°C span; critical for automotive sensor front-ends) |
| Dropout Voltage | 100mV max at 1mA load (enables operation from 1.35V supply; supports single-cell LiFePO₄ or dual alkaline systems) |
| Quiescent Current | 275µA max (enables >1-year battery life in 10µA-average-power portable medical monitors) |
| Shutdown Current | 500nA max (reduces standby power by 550× vs active mode; essential for wake-on-event architectures) |
| Load Drive | ±5mA sourcing/sinking (directly drives SAR ADC reference inputs and op-amp bias networks without buffering) |
| Capacitive Load Range | 0.02µF to 1µF (compatible with standard ceramic decoupling; no external compensation required) |
Pinout & Package
MAX6037CAUK12 is housed in a lead-free 5-pin SOT23-5 package (U5-2 code, top mark AEIX), optimized for space-constrained PCB layouts and automotive thermal cycling reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (ADJ) | Internal connection (no external connection) | Unused pin; left floating or grounded per layout best practice-no functional role in fixed-output variants |
| 2 (GND) | Reference ground return | Low-impedance return path for reference output and shutdown logic; must connect to clean analog ground plane |
| 3 (SHDN) | Active-low enable control | Pull ≤0.7V to disable output and reduce current to ≤500nA; tie to IN for always-on operation |
| 4 (IN) | Supply input (2.5V–5.5V) | Requires 0.1µF–1µF ceramic bypass capacitor to GND; minimum VIN = VOUT + 0.2V = 1.45V (not guaranteed below 2.5V) |
| 5 (OUT) | Precision 1.25V reference output | Drives 0.02µF–1µF capacitive load; connects directly to ADC REF+ or op-amp non-inverting input |
Key Features
| Feature | Design Value |
|---|---|
| Automotive temperature range | Specified from -40°C to +125°C ambient-qualified for under-hood and ADAS module deployment |
| Low dropout at full load | ≤410mV dropout at 5mA source current enables use with 1.66V minimum supply (e.g., buck-boost output) |
| High PSRR | ≥60dB PSRR at 1kHz (per typical curves) suppresses switching regulator noise coupling into precision signal chains |
| Fast turn-on settling | 75µs to 0.1% of final value with 0.02µF load-supports rapid wake-up in duty-cycled sensor nodes |
| Stable with small ceramics | No phase-margin degradation down to 0.02µF output capacitance-eliminates need for large tantalum or polymer caps |
Applications
| Portable Medical Monitors | Automotive Cabin Sensors |
|---|---|
|
Use Scenario: Battery-powered ECG front-end acquiring microvolt-level signals with 16-bit ADC. IC Role / Device Role / Timing Role: Provides stable 1.25V reference for ADC and analog front-end gain calibration. Use Value: ±0.5% initial accuracy and 50ppm/°C tempco ensure <0.02% full-scale error over vehicle cabin temperature swing. |
Use Scenario: Occupancy detection system using thermopile sensors in HVAC ducts. IC Role / Device Role / Timing Role: Supplies excitation and reference voltage for low-noise instrumentation amplifier stages. Use Value: 275µA quiescent current extends battery life beyond 5 years in always-on monitoring mode. |
| Wireless Sensor Nodes | Precision Industrial Regulators |
|
Use Scenario: LoRaWAN node measuring soil moisture with 12-bit SAR ADC and ultra-low sleep current. IC Role / Device Role / Timing Role: Reference source enabled only during ADC conversion via SHDN control. Use Value: 500nA shutdown current reduces average system current to <1µA, enabling 10+ year coin-cell operation. |
Use Scenario: Programmable logic controller analog I/O module requiring traceable voltage standards. IC Role / Device Role / Timing Role: Primary reference for DAC output calibration and sensor signal conditioning. Use Value: 133ppm long-term stability over 1000h ensures recalibration intervals exceed 24 months in field deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6029ASA12+ | 1.25V, ±0.2% initial accuracy, 25ppm/°C, 125µA IQ, SOT23-5 | Higher accuracy and lower tempco-but no shutdown function | Select when absolute precision outweighs power-gating needs and supply current budget allows ≥125µA continuous draw |
| ADR3412ARJZ-R7 | 1.25V, ±0.1% initial accuracy, 30ppm/°C, 120µA IQ, 5-lead SOT23 | Lower noise (10µVRMS), better long-term stability-but no shutdown, higher cost | Choose for metrology-grade data acquisition where 0.1% accuracy and sub-30ppm/°C drift are mandatory |
Compared with MAX6029ASA12+ and ADR3412ARJZ-R7, the MAX6037CAUK12 trades minor accuracy and tempco for integrated shutdown, wider input range (2.5V–5.5V), and automotive qualification-making it optimal for battery-sensitive, temperature-varying embedded systems where power sequencing matters.
Availability
MAX6037CAUK12 is available at Aetrix Electronics and suitable for portable medical monitors, automotive cabin sensors, and wireless sensor nodes requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for MAX6037CAUK12 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-with emphasis on low-power, high-reliability performance.
The MAX6037 family targets battery-operated and automotive systems needing micropower, shutdown-capable voltage references with guaranteed operation from -40°C to +125°C.
FAQ
What is the maximum load current the MAX6037CAUK12 can source or sink while maintaining regulation?
The MAX6037CAUK12 is specified to source and sink up to ±5mA while maintaining output voltage regulation within datasheet limits. At 5mA source current, dropout remains ≤410mV, and load regulation is ≤0.072%/mA-ensuring stable 1.25V output even when driving moderate analog circuitry directly. This capability eliminates the need for external buffer amplifiers in many sensor interface designs.
Does the MAX6037CAUK12 require an external output capacitor, and what value range is supported?
Yes, the MAX6037CAUK12 requires an external output capacitor between OUT and GND for stability. It is fully characterized and guaranteed stable with capacitive loads from 0.02µF to 1µF-covering common X7R/X5R 0402/0603 ceramic values. No series resistance or special dielectric is needed, simplifying layout and reducing BOM count.
How does the shutdown functionality of the MAX6037CAUK12 operate, and what is its leakage behavior?
The MAX6037CAUK12 features an active-low SHDN pin: pulling it ≤0.7V disables the reference output and reduces total supply current to ≤500nA (typically 50pA). When disabled, output impedance rises to >10MΩ, effectively isolating the reference node. This behavior enables true zero-power sleep states in energy-harvesting and battery-backed systems.
Is the MAX6037CAUK12 qualified for automotive applications, and what temperature range does it cover?
Yes, the MAX6037CAUK12 is explicitly specified and tested over the full automotive temperature range of -40°C to +125°C ambient. Its parametric guarantees-including initial accuracy, tempco, dropout, and shutdown current-apply across this range, making it suitable for engine control units, ADAS modules, and cabin electronics without derating.
Can the MAX6037CAUK12 be used with input voltages below 2.5V, such as 1.8V or 2.2V?
No-the MAX6037CAUK12 is not guaranteed to operate below 2.5V input. Absolute minimum supply is 2.5V, and line regulation testing only covers 2.5V–5.5V. Attempting operation at 1.8V or 2.2V may result in unregulated output, excessive dropout, or failure to start. For sub-2.5V systems, consider the MAX6025 or MAX6029 families instead.
MAX6037CAUK12 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 FAQ
1.How can I place an order for MAX6037CAUK12 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6037CAUK12 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 reliable?
The price and inventory of MAX6037CAUK12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6037CAUK12 is usually 5 days.
3.What payment methods are accepted for MAX6037CAUK12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6037CAUK12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6037CAUK12?
MAX6037CAUK12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6037CAUK12 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?
For technical support, including MAX6037CAUK12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6037CAUK12 requirements.
6.How does Aetrix verify that MAX6037CAUK12 is sourced from the original manufacturer or authorized distributors?
All MAX6037CAUK12 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 meets industry standards.
7.What is the process for return or replacement of MAX6037CAUK12?
All MAX6037CAUK12 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6037CAUK12, 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 part is unused and in its original packaging.
Return procedure for MAX6037CAUK12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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