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Analog Devices Inc./Maxim Integrated MAX6037BAUK12+T
- Part No.:
- MAX6037BAUK12+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6037BAUK12+T.pdf
- Description:
- IC VREF SERIES 0.3% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,882
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Product details
Overview
MAX6037BAUK12+T from Maxim Integrated is a 1.25V fixed-output, low-dropout micropower voltage reference with active-low shutdown, ±0.3% initial accuracy, 50ppm/°C max temperature coefficient, 100mV max dropout at 1mA, and 275µA max quiescent current. It operates from 2.5V to 5.5V supply and delivers ±5mA load current, serving as a precision analog reference in battery-powered medical sensors and portable instrumentation.
For engineers reviewing the MAX6037BAUK12+T datasheet, MAX6037BAUK12+T pinout, MAX6037BAUK12+T application, or MAX6037BAUK12+T equivalent, key selection criteria include its automotive-grade -40°C to +125°C operation, SOT23-5 package footprint, sub-500nA shutdown current, and compatibility with 0.02µF–1µF output capacitors for stable regulation in space-constrained embedded systems.
Technical Context
The MAX6037BAUK12+T is a series-mode bandgap voltage reference with internal trimming for 1.25V output. Its shutdown circuitry uses an active-low SHDN input that reduces supply current to ≤500nA while raising output impedance to >10MΩ when disabled.
It features a low-impedance buffered output capable of sourcing/sinking ±5mA, supports capacitive loads from 0.02µF to 1µF without oscillation, and maintains output stability across input voltages from 2.5V to 5.5V - with line regulation as tight as 0.0006%/V and load regulation ≤0.12%/mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.25V ±0.3% (max) at +25°C - ensures consistent ADC/DAC biasing across production units |
| Tempco | 50ppm/°C (max) - limits drift to ±625µV over -40°C to +125°C range |
| Dropout Voltage | 100mV (max) at 1mA - enables operation with VIN as low as 1.35V for 1.25V output |
| Quiescent Current | 275µA (max) - extends battery life in always-on sensor nodes |
| Shutdown Current | 500nA (max) - reduces standby power by >500× vs active mode |
| Load Drive | ±5mA - supports direct interface to op-amp inputs, SAR ADC references, and small logic rails |
| Capacitive Load Range | 0.02µF to 1µF - accommodates ceramic or tantalum output caps without compensation |
Pinout & Package
MAX6037BAUK12+T is housed in a 5-pin SOT23-5 package (U5-2 code), with exposed pad not electrically connected. Pin 1 is internally connected (I.C.) and must remain unconnected; it is not used for adjustment - this part is fixed-output only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (I.C.) | Internally connected | No external connection required; unused pin for fixed-output variants |
| 2 (GND) | Ground reference | Primary return path for reference output and supply current; requires low-inductance connection |
| 3 (SHDN) | Active-low shutdown control | Pull ≤0.7V to disable output and reduce current to ≤500nA; tie to IN for always-on operation |
| 4 (IN) | Supply input | Accepts 2.5V–5.5V; bypass with 0.1µF capacitor to GND for noise rejection |
| 5 (OUT) | Precision reference output | Delivers stable 1.25V; 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 single-cell Li-ion (3.0V min) or coin-cell (2.5V min) supplies |
| High output drive | ±5mA sourcing/sinking - eliminates need for external buffer in most data-acquisition signal chains |
| Ultra-low shutdown current | ≤500nA - allows multi-year battery operation in intermittent-sampling IoT endpoints |
| Capacitor-stable operation | Stable with 0.02µF–1µF output capacitance - supports miniature 0201/0402 MLCCs without external compensation |
Applications
| Portable Medical Sensors | Wireless Sensor Nodes |
|---|---|
|
Use Scenario: Continuous glucose monitor (CGM) using 16-bit ADC for analog front-end signal conditioning. IC Role / Device Role / Timing Role: Provides stable 1.25V reference for ADC full-scale calibration and ratiometric sensor excitation. Use Value: ±0.3% initial accuracy and 50ppm/°C tempco ensure <±1 LSB error over full operating temperature range. |
Use Scenario: Battery-powered environmental sensor node transmitting temperature/humidity via BLE. IC Role / Device Role / Timing Role: Supplies precision reference to low-power SAR ADC during brief measurement bursts. Use Value: 275µA quiescent current and 500nA shutdown current extend CR2032 battery life to >5 years in sleep-dominated duty cycle. |
| Precision Regulator Feedback | Industrial Data Acquisition |
|
Use Scenario: Low-noise LDO feedback network requiring high-accuracy voltage setpoint. IC Role / Device Role / Timing Role: Replaces resistor divider in feedback path to improve regulation accuracy and thermal stability. Use Value: 1.25V output matches standard TL431-based designs; 0.0006%/V line regulation minimizes input-voltage-induced output variation. |
Use Scenario: Modular PLC analog input module with multiple isolated 24-bit sigma-delta ADCs. IC Role / Device Role / Timing Role: Local reference per channel to eliminate crosstalk and ground-loop errors in multi-channel systems. Use Value: SOT23-5 footprint enables dense channel packing; ±5mA drive supports simultaneous multi-ADC reference loading. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6037AAUK12+T | Higher grade: ±0.2% initial accuracy and 25ppm/°C tempco vs. B-grade's ±0.3% and 50ppm/°C | Suitable where tighter long-term stability or wider temperature margin is required (e.g., lab-grade instrumentation) | Select when system-level accuracy budget demands <±0.1% total error over temperature and time |
| ADR3412ARJZ-R7 | Fixed 1.2V output, ±0.1% initial accuracy, 30ppm/°C tempco, 190µA typical IQ, SOT23-5 | Lower output voltage; optimized for 1.2V systems (e.g., FPGA core voltage monitoring) | Choose if 1.2V reference suffices and lower tempco is prioritized over shutdown functionality |
Compared with MAX6037BAUK12+T, the AA-grade offers tighter accuracy at higher cost, while ADR3412 provides superior tempco and lower IQ but lacks shutdown and delivers 1.2V instead of 1.25V - making it unsuitable for legacy 1.25V ADC reference designs.
Availability
MAX6037BAUK12+T is available at Aetrix Electronics and suitable for portable medical sensors, wireless sensor nodes, and precision regulator feedback circuits requiring stable component supply across extended product lifecycles.
Supply support for MAX6037BAUK12+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 demanding industrial, automotive, and medical applications.
The MAX6037 family targets battery-powered and space-constrained systems needing ultra-low-power, high-accuracy voltage references with shutdown capability - especially where automotive temperature range and SOT23 packaging are mandatory.
FAQ
What is the maximum input voltage for MAX6037BAUK12+T?
The absolute maximum input voltage for MAX6037BAUK12+T is +6V, but the recommended operating range is 2.5V to 5.5V. Exceeding 5.5V risks permanent damage, and operation below 2.5V may cause output instability or failure to regulate. The device is specified for reliable 1.25V output across this full 2.5V–5.5V range with guaranteed line regulation performance.
Does MAX6037BAUK12+T require an external capacitor on the output?
Yes, MAX6037BAUK12+T requires an output capacitor between OUT and GND, sized from 0.02µF to 1µF, to ensure stability under all load and supply conditions. Ceramic capacitors are recommended for lowest ESR; values outside this range may cause oscillation or degraded transient response. No series resistor or additional compensation is needed.
Can MAX6037BAUK12+T be used in place of MAX6037AAUK12+T?
MAX6037BAUK12+T can be substituted for MAX6037AAUK12+T in non-critical applications where ±0.3% initial accuracy and 50ppm/°C tempco meet system requirements. However, it is not a drop-in replacement for designs relying on the A-grade's tighter ±0.2% accuracy and 25ppm/°C spec - such as high-resolution 18-bit data acquisition systems where reference error directly impacts ENOB.
What is the typical turn-on settling time for MAX6037BAUK12+T?
The typical turn-on settling time for MAX6037BAUK12+T is 75µs to within 0.1% of final 1.25V output when COUT = 0.02µF and VIN steps from 0V to 3V with SHDN pulled high. This fast wake-up supports burst-mode sensing applications. Settling time increases with larger output capacitance - e.g., ~2.1ms with 1µF.
Is pin 1 (ADJ/I.C.) connected internally in MAX6037BAUK12+T?
Yes, pin 1 of MAX6037BAUK12+T is labeled "I.C." (Internally Connected) in the datasheet and must remain unconnected. Unlike the MAX6037_ADJ variant, this fixed 1.25V version has no adjustment function - the ADJ node is tied internally and inaccessible. Connecting anything to pin 1 may compromise performance or reliability.
MAX6037BAUK12+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.3%
- 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
MAX6037BAUK12+T FAQ
1.How can I place an order for MAX6037BAUK12+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6037BAUK12+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 MAX6037BAUK12+T reliable?
The price and inventory of MAX6037BAUK12+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6037BAUK12+T is usually 5 days.
3.What payment methods are accepted for MAX6037BAUK12+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6037BAUK12+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6037BAUK12+T?
MAX6037BAUK12+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6037BAUK12+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 MAX6037BAUK12+T?
For technical support, including MAX6037BAUK12+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6037BAUK12+T requirements.
6.How does Aetrix verify that MAX6037BAUK12+T is sourced from the original manufacturer or authorized distributors?
All MAX6037BAUK12+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 MAX6037BAUK12+T meets industry standards.
7.What is the process for return or replacement of MAX6037BAUK12+T?
All MAX6037BAUK12+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6037BAUK12+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 MAX6037BAUK12+T part is unused and in its original packaging.
Return procedure for MAX6037BAUK12+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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