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Analog Devices Inc./Maxim Integrated MAX6037BAUK21-T
- Part No.:
- MAX6037BAUK21-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6037BAUK21-T.pdf
- Description:
- LOW-POWER, FIXED REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MAX6037BAUK21-T from Maxim Integrated is a low-dropout, micropower series-mode voltage reference with fixed 2.048V output, ±0.3% initial accuracy, 50ppm/°C max temperature coefficient, 100mV max dropout at 1mA, and active-low shutdown consuming ≤500nA. It operates from 2.5V to 5.5V supply and delivers ±5mA load current-ideal for precision ADC/DAC biasing in portable medical and wireless LAN equipment.
For engineers reviewing the MAX6037BAUK21-T datasheet, MAX6037BAUK21-T pinout, MAX6037BAUK21-T application, or MAX6037BAUK21-T equivalent, key selection criteria include its automotive-grade -40°C to +125°C operation, SOT23-5 package footprint, low quiescent current (275µA max), capacitive-load stability (0.02µF–1µF), and shutdown logic thresholds (VENL ≤ 0.7V, VENH ≥ 2.0V).
Technical Context
The MAX6037BAUK21-T implements a bandgap-based series-mode reference architecture with internal trimming for 2.048V nominal output. Its shutdown circuitry disables the output stage while maintaining high-impedance output (205kΩ) and sub-500nA supply draw-critical for battery-backed systems requiring rapid wake-up.
It features built-in thermal hysteresis compensation (458ppm typical), supports capacitive loads up to 1µF without oscillation, and maintains line regulation of ≤0.0107%/V across its 2.5V–5.5V input range-enabling stable performance in noisy or dynamically varying supply environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048V ±0.3% at +25°C - matches common 12-bit DAC/ADC full-scale reference points |
| Tempco | ≤50ppm/°C - ensures ≤0.12% output drift over -40°C to +125°C automotive range |
| Quiescent Current | ≤275µA - enables >1-year battery life in 10µA-average-power sensor nodes |
| Shutdown Current | ≤500nA - reduces standby power by >500× vs active mode |
| Dropout Voltage | ≤100mV at 1mA - allows operation from single Li-ion cell (3.0V min) with 2.048V output |
| Load Drive | ±5mA sourcing/sinking - directly drives SAR ADC reference inputs and op-amp buffers |
| Capacitive Stability | 0.02µF to 1µF - accommodates ceramic decoupling and EMI filtering without phase margin loss |
Pinout & Package
The MAX6037BAUK21-T is housed in a 5-pin SOT23-5 package (U5-2 code, top mark AEIZ), with exposed pad not electrically connected. Pin 1 is ADJ (internally connected, no external connection); Pin 2 is GND; Pin 3 is SHDN (active-low enable); Pin 4 is IN (2.5V–5.5V supply input); Pin 5 is OUT (2.048V reference output).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (ADJ) | Internal connection | No external connection required; reserved for adjustable variants only |
| 2 (GND) | Analog ground reference | Must be low-impedance path to system ground plane to minimize noise coupling |
| 3 (SHDN) | Active-low enable control | Pull ≤0.7V to disable output; ≥2.0V to enable; 0.05–1000nA leakage allows direct MCU GPIO drive |
| 4 (IN) | Supply input | Requires 0.1µF ceramic bypass to GND; minimum 2.5V input for 2.048V output |
| 5 (OUT) | Reference voltage output | Drives 0.02–1µF capacitor to GND; sources/sinks ±5mA with <0.12% load regulation error |
Key Features
| Feature | Design Value |
|---|---|
| Automotive temperature range | Specified from -40°C to +125°C - qualified for under-hood and industrial control applications |
| Low-noise output | 11µVP-P (0.1Hz–10Hz), 25µVRMS (10Hz–1kHz) - minimizes quantization error in high-resolution data acquisition |
| Fast turn-on settling | 2ms to 0.1% of final value (COUT = 0.02µF) - supports burst-mode sensing with minimal latency |
| High PSRR | ≥60dB at 1kHz - rejects switching regulator ripple without additional LDO filtering |
| Long-term stability | 133ppm over 1000h - ensures calibration validity in field-deployed instrumentation |
Applications
| Portable Medical Sensors | Wireless LAN Transceivers |
|---|---|
Use Scenario: Battery-powered glucose monitor with 12-bit ADC sampling analog sensor output. IC Role / Device Role / Timing Role: Provides stable 2.048V reference for ADC conversion, enabling accurate glucose concentration calculation. Use Value: ±0.3% initial accuracy and 50ppm/°C tempco ensure <0.5% total measurement error across operating temperature range. | Use Scenario: 2.4GHz Wi-Fi transceiver IC requiring precise reference for RF synthesizer and baseband ADC/DAC. IC Role / Device Role / Timing Role: Supplies clean, low-noise 2.048V reference to mixed-signal subsystems for channel calibration and I/Q balance. Use Value: 11µVP-P low-frequency noise prevents spurious tones in RF spectrum; 2ms turn-on supports fast channel hopping. |
| Precision Industrial Regulators | Automotive Cabin Control Units |
Use Scenario: Programmable logic controller (PLC) analog input module measuring 4–20mA current loops. IC Role / Device Role / Timing Role: Generates accurate 2.048V reference for current-to-voltage conversion and ADC digitization. Use Value: ±5mA drive capability eliminates need for external buffer; 0.02µF–1µF capacitive stability simplifies PCB layout with standard decoupling. | Use Scenario: HVAC control unit in automotive dashboard requiring reliable sensor biasing under wide ambient temperature swings. IC Role / Device Role / Timing Role: Supplies reference voltage to temperature/humidity sensors and microcontroller ADC during cold cranking (low VIN) and hot soak conditions. Use Value: 100mV dropout enables operation down to 2.148V supply; -40°C to +125°C rating guarantees functionality across full vehicle lifecycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3020AIDBZR | 2.048V, ±0.2% initial accuracy, 50ppm/°C, 50µA quiescent current, SOT23-3 package | Lacks shutdown pin; smaller footprint but no enable control | Select when ultra-low power (<50µA) is critical and shutdown functionality is unnecessary |
| ADR3420ARJZ-R7 | 2.048V, ±0.1% initial accuracy, 30ppm/°C, 120µA quiescent current, SOT23-5 package | Higher accuracy/tempco; no shutdown; requires external capacitor for stability | Select when tighter initial tolerance and lower tempco justify higher cost and added external components |
Compared with REF3020AIDBZR and ADR3420ARJZ-R7, the MAX6037BAUK21-T uniquely combines automotive temperature rating, integrated shutdown, and SOT23-5 pin compatibility-making it optimal for space-constrained, battery-sensitive designs requiring guaranteed operation across extreme environments.
Availability
MAX6037BAUK21-T is available at Aetrix Electronics and suitable for portable medical sensors, wireless LAN transceivers, and precision industrial regulators requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6037BAUK21-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 communications applications.
The MAX6037 family targets battery-powered and automotive systems needing micropower, high-accuracy voltage references with shutdown-specifically optimized for ADC/DAC biasing, sensor excitation, and precision regulator feedback.
FAQ
What is the maximum input voltage for the MAX6037BAUK21-T?
The MAX6037BAUK21-T supports an absolute maximum input voltage of +6V on the IN pin. Its operational supply range is 2.5V to 5.5V, with minimum input determined by output voltage plus 0.2V (i.e., ≥2.248V for 2.048V output). Exceeding +6V risks permanent damage per Absolute Maximum Ratings.
Does the MAX6037BAUK21-T require an external capacitor on the output?
Yes, the MAX6037BAUK21-T requires an output capacitor between OUT and GND for stability, specified in the range of 0.02µF to 1µF. Ceramic capacitors are recommended. Omitting this capacitor may cause oscillation or degraded noise performance, especially under dynamic load conditions.
Can the MAX6037BAUK21-T drive a 5mA load while maintaining accuracy?
Yes, the MAX6037BAUK21-T is rated to source and sink up to ±5mA while maintaining ≤0.12% load regulation error. At 5mA sourcing, output voltage change is ≤0.044%/mA (typical), ensuring stable 2.048V reference even when driving ADC reference inputs or op-amp buffers directly.
What is the shutdown behavior of the MAX6037BAUK21-T?
When SHDN is pulled low (≤0.7V), the MAX6037BAUK21-T disables its output stage, reducing supply current to ≤500nA and presenting a high-impedance output (205kΩ). The output voltage collapses, and the device remains in this low-power state until SHDN rises above 2.0V, triggering a 2ms turn-on settling time to full 2.048V output.
Is the MAX6037BAUK21-T suitable for automotive applications?
Yes, the MAX6037BAUK21-T is explicitly specified over the -40°C to +125°C automotive temperature range and packaged in a qualified SOT23-5 (U5-2) outline. Its 50ppm/°C tempco, 100mV dropout, and robust ESD tolerance make it suitable for cabin control units, body electronics, and sensor modules in passenger vehicles.
MAX6037BAUK21-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):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.3%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- 11µVp-p
- Noise - 10Hz to 10kHz:
- 25µVrms
- 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
MAX6037BAUK21-T FAQ
1.How can I place an order for MAX6037BAUK21-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6037BAUK21-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 MAX6037BAUK21-T reliable?
The price and inventory of MAX6037BAUK21-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6037BAUK21-T is usually 5 days.
3.What payment methods are accepted for MAX6037BAUK21-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6037BAUK21-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6037BAUK21-T?
MAX6037BAUK21-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6037BAUK21-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 MAX6037BAUK21-T?
For technical support, including MAX6037BAUK21-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6037BAUK21-T requirements.
6.How does Aetrix verify that MAX6037BAUK21-T is sourced from the original manufacturer or authorized distributors?
All MAX6037BAUK21-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 MAX6037BAUK21-T meets industry standards.
7.What is the process for return or replacement of MAX6037BAUK21-T?
All MAX6037BAUK21-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6037BAUK21-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 MAX6037BAUK21-T part is unused and in its original packaging.
Return procedure for MAX6037BAUK21-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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