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Analog Devices Inc./Maxim Integrated MAX6037BAUK41
- Part No.:
- MAX6037BAUK41
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6037BAUK41.pdf
- Description:
- LOW-POWER, FIXED REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:1,082
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Product details
Overview
MAX6037BAUK41 from Maxim Integrated is a low-dropout, micropower series-mode voltage reference with fixed 4.096V output, ±0.3% initial accuracy (A-grade: ±0.2%), 50ppm/°C max temperature coefficient, 2.5V–5.5V input range, and active-low shutdown consuming ≤500nA. It delivers ±5mA load current capability and operates across the automotive temperature range (−40°C to +125°C), ideal for precision ADC/DAC biasing in battery-powered instrumentation.
For engineers reviewing the MAX6037BAUK41 datasheet, MAX6037BAUK41 pinout, MAX6037BAUK41 application, or MAX6037BAUK41 equivalent, this page provides verified electrical specifications, SOT23-5 terminal mapping, real-world use cases in medical sensors and wireless LAN power management, and validated alternative options for design flexibility and supply continuity.
Technical Context
The MAX6037BAUK41 employs a bandgap-based series regulator architecture optimized for low quiescent current (210–275µA) and minimal dropout (≤100mV at 1mA). Its internal circuitry includes a precision trimmed reference core, shutdown control logic with hysteresis-free enable/disable transitions, and output stage capable of sourcing/sinking 5mA while maintaining stability with 0.02µF–1µF capacitive loads.
It features rail-to-rail compatible shutdown input (VENL ≤ 0.8V, VENH ≥ 2.0V over full VIN range), low-noise operation (50µVRMS, 10Hz–1kHz), and robust thermal hysteresis performance (524ppm). The device is not adjustable - pin 1 (ADJ) is internally connected and unused - distinguishing it from the MAX6037_ADJ variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V ±0.3% (max initial error at +25°C); enables direct interface with 12-bit ADCs requiring 4.096V full-scale reference. |
| Tempco | 50ppm/°C (max); ensures ≤±0.61mV drift over −40°C to +125°C, critical for automotive sensor signal chains. |
| Quiescent Current | 210–275µA (max); supports >1-year battery life in portable medical monitors drawing <10µA average system current. |
| Shutdown Current | ≤500nA (max); reduces standby power by >400× vs active mode, enabling ultra-low-power wake-on-event designs. |
| Dropout Voltage | ≤100mV at 1mA load; allows operation from 4.196V minimum input, compatible with single-cell LiFePO₄ or regulated 4.2V rails. |
| Load Drive | ±5mA sourcing/sinking; drives SAR ADC reference inputs, op-amp bias networks, and small DAC buffers without external buffering. |
| Capacitive Stability | Stable with 0.02µF–1µF output capacitance; eliminates need for specialized low-ESR ceramics in space-constrained layouts. |
Pinout & Package
MAX6037BAUK41 is housed in a 5-pin SOT23-5 package (package code U5-2, top mark AEJA), with lead-free RoHS-compliant finish. Pin 1 is internally connected (I.C.) and must remain unconnected; all other pins follow standard SOT23-5 orientation (pin 1 = top-left, pin 5 = top-right).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (ADJ) | Internally connected (I.C.) | No external connection required; unused in fixed-output variants like MAX6037BAUK41. |
| 2 (GND) | Analog ground reference | Must be tied directly to low-impedance system ground plane; separates reference return from digital/power grounds. |
| 3 (SHDN) | Active-low shutdown control | Pull ≤0.8V to disable output; tie to IN (or logic high) for normal operation; supports microcontroller GPIO control. |
| 4 (IN) | Supply input (2.5V–5.5V) | Requires 0.1µF ceramic bypass capacitor to GND; minimum input = VOUT + 0.2V = 4.296V for stable regulation. |
| 5 (OUT) | Precision reference output | Delivers 4.096V ±0.3%; connect 0.02µF–1µF capacitor to GND for noise filtering and transient stability. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 4.096V output | Matches standard 12-bit ADC full-scale range (2¹² × 1mV), eliminating scaling errors in data acquisition systems. |
| Automotive temperature range | Guaranteed operation from −40°C to +125°C enables deployment in engine control units and under-hood sensors. |
| Low 50ppm/°C tempco | Reduces calibration frequency in field-deployed test equipment; meets MIL-STD-810G thermal cycling requirements. |
| Sub-500nA shutdown current | Enables multi-year operation on coin cells in IoT edge nodes; supports deep-sleep modes in wearable health monitors. |
| 410kΩ output impedance when disabled | Prevents backfeeding into downstream circuits during shutdown, protecting sensitive analog front-ends. |
Applications
| Medical Sensor Calibration | Portable Data Logger |
|---|---|
|
Use Scenario: Calibrating thermistor-based patient temperature probes in handheld clinical devices. IC Role / Device Role / Timing Role: Provides stable 4.096V reference for 12-bit sigma-delta ADC measuring ratiometric bridge outputs. Use Value: ±0.3% initial accuracy and 50ppm/°C tempco ensure <±0.1°C measurement repeatability across clinic environments. |
Use Scenario: Powering autonomous environmental monitoring nodes logging temperature/humidity every 10 minutes. IC Role / Device Role / Timing Role: Supplies precision reference to low-power ADC during brief active windows; shuts down between samples. Use Value: 500nA shutdown current extends CR2032 battery life beyond 3 years at 10-minute sampling intervals. |
| Wireless LAN RF Front-End Bias | Precision Industrial Regulator |
|
Use Scenario: Setting bias points for 2.4GHz PA driver stages in Wi-Fi 6 IoT modules. IC Role / Device Role / Timing Role: Generates clean 4.096V reference for DAC-controlled current sources feeding RF transistors. Use Value: 50µVRMS noise (10Hz–1kHz) prevents AM-to-PM distortion in transmit chain, preserving EVM performance. |
Use Scenario: Stabilizing feedback reference in isolated 24V-to-5V DC-DC converters for PLC I/O modules. IC Role / Device Role / Timing Role: Replaces Zener diode in TL431-based shunt regulator loop to improve line/load regulation. Use Value: 0.0133%/V line regulation and ±5mA drive eliminate external op-amp buffer, reducing BOM count and layout area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3040AIDBZR | 4.096V, ±0.2% initial accuracy, 50ppm/°C, 50µA quiescent current, SOT23-3 package (no shutdown) | Lacks active shutdown; lower IQ but no power-gating capability | Select when lowest possible operating current is critical and shutdown is managed externally. |
| ADR3440ARJZ-R7 | 4.096V, ±0.1% initial accuracy, 30ppm/°C, 120µA IQ, 6-pin SOT23 with enable pin | Higher accuracy/tempco; requires external 100nF bypass cap; no integrated ADJ pin | Choose for metrology-grade systems where ±0.1% tolerance justifies cost premium and layout complexity. |
Compared with REF3040AIDBZR and ADR3440ARJZ-R7, the MAX6037BAUK41 uniquely combines automotive temperature rating, integrated shutdown, and SOT23-5 compatibility in a single 4.096V solution - making it optimal for space-constrained, battery-operated industrial and medical designs requiring guaranteed performance across extreme ambient conditions.
Availability
MAX6037BAUK41 is available at Aetrix Electronics and suitable for medical sensor calibration, portable data loggers, wireless LAN RF biasing, and precision industrial regulators requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6037BAUK41 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 demanding industrial, automotive, and medical applications.
The MAX6037 family was engineered specifically for ultra-low-power, high-accuracy voltage referencing in battery-operated and automotive-grade systems - emphasizing shutdown efficiency, wide-input operation, and robust thermal performance.
FAQ
What is the output voltage tolerance and temperature coefficient of the MAX6037BAUK41?
The MAX6037BAUK41 has a fixed output voltage of 4.096V with ±0.3% initial accuracy (max) at +25°C and a maximum temperature coefficient of 50ppm/°C over −40°C to +125°C. This means its output drift remains within ±0.61mV across the full automotive temperature range, supporting high-fidelity data acquisition in harsh environments. These values are production-tested and guaranteed per Maxim's datasheet revision 1.
Can the MAX6037BAUK41 be used with a 3.3V supply?
No - the MAX6037BAUK41 requires a minimum input voltage of VOUT + 0.2V = 4.296V for proper regulation. With a 4.096V output, a 3.3V supply falls below the required headroom and will not sustain regulation. It must be powered from ≥4.3V sources such as 4.5V LDOs, 4.8V LiFePO₄ batteries, or boosted 3.3V rails. Attempting operation at 3.3V results in unregulated output and potential instability.
How does the shutdown function work on the MAX6037BAUK41?
The MAX6037BAUK41 features an active-low SHDN pin (pin 3): pulling it ≤0.8V disables the output and reduces supply current to ≤500nA, while connecting it to IN (or logic high ≥2.0V) enables normal operation. During shutdown, the OUT pin enters high-impedance state (ZOUT >410kΩ), preventing backfeed. Turn-on settling time is 3.2ms to 0.1% of final value with COUT = 0.02µF.
Is pin 1 (ADJ) usable on the MAX6037BAUK41?
No - pin 1 on the MAX6037BAUK41 is internally connected (I.C.) and reserved for the adjustable MAX6037_ADJ variant. It must remain unconnected in PCB layout. Using it as an adjustment node would cause functional failure, as the internal reference core is trimmed for fixed 4.096V output. The datasheet explicitly states "Do not connect anything to this pin" for all fixed-output versions including MAX6037BAUK41.
What output capacitor value is recommended for stable operation of the MAX6037BAUK41?
The MAX6037BAUK41 is stable with output capacitance ranging from 0.02µF to 1µF - including standard X7R/X5R ceramics. A 0.1µF ceramic capacitor is recommended for general-purpose use, balancing noise suppression, transient response, and board space. Values below 0.02µF risk oscillation; above 1µF may increase turn-on time but do not compromise stability. No ESR requirement applies.
MAX6037BAUK41 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):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.3%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- 24µVp-p
- Noise - 10Hz to 10kHz:
- 50µVrms
- Voltage - Input:
- 4.3V ~ 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
MAX6037BAUK41 FAQ
1.How can I place an order for MAX6037BAUK41 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6037BAUK41 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 MAX6037BAUK41 reliable?
The price and inventory of MAX6037BAUK41 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6037BAUK41 is usually 5 days.
3.What payment methods are accepted for MAX6037BAUK41?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6037BAUK41 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6037BAUK41?
MAX6037BAUK41 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6037BAUK41 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 MAX6037BAUK41?
For technical support, including MAX6037BAUK41 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6037BAUK41 requirements.
6.How does Aetrix verify that MAX6037BAUK41 is sourced from the original manufacturer or authorized distributors?
All MAX6037BAUK41 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 MAX6037BAUK41 meets industry standards.
7.What is the process for return or replacement of MAX6037BAUK41?
All MAX6037BAUK41 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6037BAUK41, 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 MAX6037BAUK41 part is unused and in its original packaging.
Return procedure for MAX6037BAUK41:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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