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Analog Devices Inc./Maxim Integrated MAX6037BAUK25+T
- Part No.:
- MAX6037BAUK25+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6037BAUK25+T.pdf
- Description:
- IC VREF SERIES 0.3% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,499
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Product details
Overview
MAX6037BAUK25+T from Maxim Integrated is a low-dropout, micropower voltage reference IC with fixed 2.5V output, ±0.3% 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 precision ADC/DAC biasing in battery-powered portable instrumentation.
For engineers reviewing the MAX6037BAUK25+T datasheet, MAX6037BAUK25+T pinout, MAX6037BAUK25+T application, or MAX6037BAUK25+T equivalent, this page provides verified circuit role (precision series voltage reference), package mapping (5-pin SOT23), thermal performance (–40°C to +125°C automotive grade), stability specs (0.02µF–1µF capacitive-load range), and validated alternatives for 2.5V reference designs.
Technical Context
The MAX6037BAUK25+T is a series-mode bandgap voltage reference with internal trimming for fixed 2.5V output. Its architecture enables low quiescent current (210–275µA) and high PSRR (>60dB at 1kHz), supporting stable operation under varying input voltage (line regulation ≤0.012%/V) and load conditions (load regulation ≤0.036%/mA sourcing).
Shutdown is implemented via an active-low logic input (SHDN) that disables the reference core and raises output impedance to >250kΩ while reducing supply current to ≤500nA. The device requires no external components for basic operation but mandates 0.02µF–1µF output capacitance for stability across temperature and load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±0.3% at +25°C - ensures accurate full-scale calibration for 12-bit to 14-bit data converters |
| Tempco | 50ppm/°C max - limits drift to ≤125ppm over –40°C to +125°C, critical for automotive sensor signal chains |
| Dropout Voltage | 100mV max at 1mA - enables operation with only 2.6V input, extending battery life in single-cell Li-ion systems |
| Quiescent Current | 210–275µA - supports multi-year operation in energy-harvesting and IoT endpoint nodes |
| Shutdown Current | ≤500nA - reduces standby power by >400×, essential for always-on wake-up circuits |
| Load Drive | ±5mA sourcing/sinking - directly drives ADC reference inputs and op-amp bias networks without buffering |
| Capacitive Stability | 0.02µF to 1µF output capacitor - accommodates ceramic, tantalum, or polymer caps for EMI-sensitive layouts |
Pinout & Package
MAX6037BAUK25+T is housed in a lead-free 5-pin SOT23 package (U5-2 code, top mark AEJH), optimized for space-constrained PCBs and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (I.C.) | Internally connected | No external connection required; reserved for fixed-output variants only |
| 2 (GND) | Ground reference | Low-impedance return path for reference core and load current; must be star-connected to minimize noise |
| 3 (SHDN) | Active-low shutdown control | Pull ≤0.75V to disable output; tie to IN for always-on operation; compatible with 1.8V/3.3V logic |
| 4 (IN) | Supply input | Accepts 2.7V–5.5V; bypass with 0.1µF ceramic cap to GND for PSRR optimization |
| 5 (OUT) | Reference voltage output | Delivers regulated 2.5V; requires 0.02µF–1µF capacitor to GND for phase margin and transient stability |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.5V output | Matches standard SAR ADC full-scale ranges and eliminates resistor-divider error in precision measurement front-ends |
| Automotive temperature range | –40°C to +125°C operation enables use in engine control units, ADAS sensors, and under-hood telemetry |
| Low 50ppm/°C tempco | Reduces system-level calibration frequency in medical thermometers and industrial process transmitters |
| 100mV dropout at 1mA | Permits direct regulation from 2.6V coin cells or buck converter outputs without additional LDO stages |
| 500nA shutdown current | Enables micro-power sleep modes in portable ECG monitors and wireless sensor nodes with <1µA total system standby |
Applications
| Portable Medical Instrumentation | Wireless Sensor Nodes |
|---|---|
Use Scenario: Battery-powered handheld blood glucose meters requiring stable 2.5V reference for 12-bit ADC conversion of electrochemical sensor signals. IC Role / Device Role / Timing Role: Precision voltage reference providing excitation and scaling for analog front-end signal chain. Use Value: ±0.3% initial accuracy and 50ppm/°C tempco ensure <0.5% total measurement error across operating temperature, meeting ISO 15197 clinical accuracy requirements. |
Use Scenario: LoRaWAN environmental sensor node powered by CR2032 coin cell, sampling temperature/humidity every 5 minutes. IC Role / Device Role / Timing Role: Low-quiescent reference enabling ultra-low-power ADC bias during active sampling bursts. Use Value: 275µA operating current and 500nA shutdown current extend battery life beyond 5 years while maintaining 12-bit effective resolution. |
| Automotive Cabin Sensors | Industrial Data Acquisition |
Use Scenario: In-cabin CO₂ sensor module operating in vehicle cabin (-40°C to +85°C ambient) with CAN bus reporting. IC Role / Device Role / Timing Role: Automotive-grade reference for NDIR detector amplifier and ADC subsystem. Use Value: –40°C to +125°C qualification and 50ppm/°C tempco guarantee consistent gas concentration calculation across extreme thermal cycling. |
Use Scenario: DIN-rail mounted 4–20mA transmitter conditioning analog inputs from strain gauges and RTDs. IC Role / Device Role / Timing Role: Stable 2.5V reference for precision DAC generating loop current setpoints. Use Value: ±5mA drive capability and 0.02µF–1µF capacitive-load tolerance simplify layout in noisy industrial environments with long trace runs. |
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 output, ±0.1% initial accuracy, 30ppm/°C tempco, 180µA quiescent current, no shutdown | Lacks shutdown function; higher accuracy suits metrology-grade calibrators but increases cost and power | Select when highest initial accuracy is prioritized over power gating and automotive temperature range |
| REF3025AIDBZR | 2.5V output, ±0.2% initial accuracy, 50ppm/°C tempco, 50µA quiescent current, no shutdown | Lower quiescent current but no shutdown; limited to –40°C to +125°C only in selected grades | Choose for ultra-low-power always-on applications where shutdown is unnecessary and board space is constrained |
Compared with ADR3425ARJZ-R7 and REF3025AIDBZR, MAX6037BAUK25+T uniquely combines automotive-grade temperature range, integrated shutdown, and balanced accuracy/power - making it optimal for battery-backed industrial controllers and automotive sensor modules requiring both precision and energy efficiency.
Availability
MAX6037BAUK25+T is available at Aetrix Electronics and suitable for portable medical instrumentation, wireless sensor nodes, automotive cabin sensors, and industrial data acquisition systems requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX6037BAUK25+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 delivers low-power, high-accuracy voltage references with shutdown for battery-operated and automotive systems requiring robust performance across –40°C to +125°C.
FAQ
What is the output voltage tolerance and temperature coefficient of MAX6037BAUK25+T?
MAX6037BAUK25+T provides a fixed 2.500V output with ±0.3% initial accuracy at +25°C and a maximum temperature coefficient of 50ppm/°C over –40°C to +125°C. This ensures total output variation remains within ±0.125% across the full automotive temperature range, supporting reliable calibration in precision measurement systems.
Does MAX6037BAUK25+T require an external output capacitor, and what value range is supported?
Yes, MAX6037BAUK25+T requires an external output capacitor for stability, with a specified range of 0.02µF to 1µF. Ceramic capacitors within this range ensure adequate phase margin and transient response; values below 0.02µF risk oscillation, while values above 1µF may degrade startup time without improving stability.
How does the shutdown feature of MAX6037BAUK25+T operate, and what is its leakage behavior?
MAX6037BAUK25+T features an active-low SHDN pin: pulling it ≤0.75V disables the reference core and reduces supply current to ≤500nA. During shutdown, output impedance rises to >250kΩ, effectively isolating the reference node. Logic-high threshold is ≥2.0V, ensuring compatibility with 1.8V and 3.3V GPIO interfaces.
Can MAX6037BAUK25+T drive a 5mA load while maintaining specified accuracy?
Yes, MAX6037BAUK25+T is rated to source and sink up to ±5mA while maintaining output accuracy within specifications. Load regulation is ≤0.036%/mA for sourcing (0–1mA) and ≤0.2%/mA for sinking (–1mA to 0), ensuring minimal deviation during dynamic load transitions in ADC reference and op-amp bias applications.
What is the minimum input voltage required for MAX6037BAUK25+T to regulate at 2.5V output?
The minimum input voltage for MAX6037BAUK25+T is 2.7V, defined as VOUT + 0.2V per datasheet specifications. At 1mA load, the dropout voltage is guaranteed ≤100mV, so regulation is maintained down to VIN = 2.6V - however, the absolute minimum specified supply is 2.7V to ensure full parameter compliance across temperature and process variation.
MAX6037BAUK25+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:
- Obsolete
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.3%
- 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
MAX6037BAUK25+T FAQ
1.How can I place an order for MAX6037BAUK25+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6037BAUK25+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 MAX6037BAUK25+T reliable?
The price and inventory of MAX6037BAUK25+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6037BAUK25+T is usually 5 days.
3.What payment methods are accepted for MAX6037BAUK25+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6037BAUK25+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6037BAUK25+T?
MAX6037BAUK25+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6037BAUK25+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 MAX6037BAUK25+T?
For technical support, including MAX6037BAUK25+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6037BAUK25+T requirements.
6.How does Aetrix verify that MAX6037BAUK25+T is sourced from the original manufacturer or authorized distributors?
All MAX6037BAUK25+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 MAX6037BAUK25+T meets industry standards.
7.What is the process for return or replacement of MAX6037BAUK25+T?
All MAX6037BAUK25+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6037BAUK25+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 MAX6037BAUK25+T part is unused and in its original packaging.
Return procedure for MAX6037BAUK25+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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