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Analog Devices Inc./Maxim Integrated MAX6037CAUK33-T
- Part No.:
- MAX6037CAUK33-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6037CAUK33-T.pdf
- Description:
- LOW-POWER, FIXED REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MAX6037CAUK33-T from Maxim Integrated is a precision, low-dropout, micropower voltage reference with fixed 3.3V output, ±0.5% initial accuracy, 50ppm/°C max temperature coefficient, 100mV max dropout at 1mA, and active-low shutdown consuming ≤500nA. It operates from 3.5V to 5.5V input and delivers ±5mA load current, serving as a stable reference in battery-powered data acquisition and portable instrumentation.
For engineers reviewing the MAX6037CAUK33-T datasheet, MAX6037CAUK33-T pinout, MAX6037CAUK33-T application, or MAX6037CAUK33-T equivalent, key selection criteria include its automotive-grade (-40°C to +125°C) operation, SOT23-5 package, low quiescent current (275µA max), capacitive-load stability (0.02–1µF), and shutdown logic thresholds (VENL ≤ 0.8V, VENH ≥ 2.0V).
Technical Context
The MAX6037CAUK33-T is a series-mode bandgap voltage reference with internal trimming for fixed 3.3V output. Its shutdown circuitry disables the output stage when SHDN is pulled low, reducing supply current to <500nA while maintaining high output impedance (>330kΩ).
It features a low-impedance buffered output capable of sourcing/sinking ±5mA, supports capacitive loads from 0.02µF to 1µF without oscillation, and maintains regulation over input voltages from 3.5V to 5.5V - ensuring compatibility with Li-ion and regulated 3.3V/5V rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.300V ±0.5% (3.2855V to 3.3165V at +25°C); enables accurate ADC/DAC biasing in 3.3V systems. |
| Initial Accuracy | ±0.5% max; eliminates need for system-level calibration in mid-precision applications like sensor signal chains. |
| Tempco | 50ppm/°C max; ensures ≤1.65mV drift over -40°C to +125°C, critical for automotive and industrial environments. |
| Dropout Voltage | 100mV max at 1mA load; allows operation with only 3.4V input, supporting single-cell Li-ion or low-headroom supplies. |
| Quiescent Current | 275µA max; extends battery life in portable medical monitors and wireless sensors. |
| Shutdown Current | 500nA max; reduces standby power by >500×, enabling long-term sleep modes in IoT endpoints. |
| Load Drive | ±5mA sourcing/sinking capability; directly drives ADC reference inputs, op-amp bias networks, and small DACs. |
| Capacitive Stability | Stable with 0.02µF–1µF output capacitance; accommodates ceramic, tantalum, or polymer caps without compensation. |
Pinout & Package
MAX6037CAUK33-T is housed in a lead-free 5-pin SOT23-5 package (U5-2 code, top mark AEJG), optimized for space-constrained PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - ADJ | Adjustment Input (No Connect) | Internally connected; left unconnected for fixed-output variants like MAX6037CAUK33-T. |
| 2 - GND | Analog Ground Reference | Low-impedance return path for reference current and output load; must be tied to clean system ground plane. |
| 3 - SHDN | Active-Low Shutdown Control | Pull ≤0.8V to disable output and reduce current to <500nA; tie to IN (≥2.0V) for normal operation. |
| 4 - IN | Supply Input | Accepts 3.5V–5.5V; requires 0.1µF bypass capacitor to GND close to pin for noise rejection and transient response. |
| 5 - OUT | Precision Reference Output | Delivers regulated 3.3V; connect 0.02µF–1µF capacitor to GND for stability and low-noise performance. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.3V Output | Factory-trimmed for 3.300V ±0.5%, eliminating external resistor networks and layout sensitivity. |
| Automotive Temperature Range | Specified from -40°C to +125°C, enabling use in under-hood ECUs and industrial control modules. |
| Low Dropout Operation | 100mV max dropout at 1mA allows reliable regulation even with aging batteries or undersized LDOs upstream. |
| Shutdown Logic Compatibility | VENL ≤ 0.8V and VENH ≥ 2.0V ensure interoperability with standard 3.3V and 5V GPIOs without level-shifting. |
| High Output Impedance in Shutdown | >330kΩ output impedance when disabled prevents loading of downstream circuits during sleep states. |
| Long-Term Stability | 133ppm drift over 1000 hours at +25°C supports 10+ year field reliability in metering and infrastructure equipment. |
Applications
| Portable Medical Sensors | Automotive Cabin Controllers |
|---|---|
|
Use Scenario: Battery-powered pulse oximeter measuring analog photodiode signals. IC Role / Device Role / Timing Role: Provides stable 3.3V reference for 12-bit ADC converting IR/red channel outputs. Use Value: ±0.5% initial accuracy and 50ppm/°C tempco ensure SpO₂ calculation error remains <1% across operating temperature. |
Use Scenario: HVAC control module in passenger compartment with wide ambient temperature swings. IC Role / Device Role / Timing Role: Supplies reference voltage to temperature/humidity sensor interface and microcontroller ADC. Use Value: -40°C to +125°C rating and 133ppm long-term stability prevent calibration drift over vehicle lifetime. |
| Wireless Sensor Nodes | Precision Industrial Regulators |
|
Use Scenario: LoRaWAN node monitoring tank level using 4–20mA loop-powered transmitter. IC Role / Device Role / Timing Role: References the current-sense amplifier and SAR ADC sampling pressure transducer output. Use Value: 275µA quiescent current and 500nA shutdown enable multi-year battery life in deep-sleep cycles. |
Use Scenario: Programmable logic controller (PLC) analog input module conditioning 0–10V field signals. IC Role / Device Role / Timing Role: Serves as master reference for dual 16-bit sigma-delta ADCs digitizing multiple channels. Use Value: 0.02µF–1µF capacitive-load tolerance simplifies filtering design; ±5mA drive supports multiplexed channel buffering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6035BAUT33+T | Same 3.3V output, but ±0.3% initial accuracy and 50ppm/°C tempco; lower quiescent current (120µA max). | Lacks shutdown function; unsuitable for power-gated systems requiring ultra-low standby current. | Select when shutdown is unnecessary and tighter initial accuracy is prioritized over dynamic power control. |
| ADR3433ARJZ-R7 | 3.3V output, ±0.1% initial accuracy, 30ppm/°C tempco, 6µA quiescent current, no shutdown. | Higher precision but no shutdown; requires external enable circuitry for low-power modes. | Choose for metrology-grade accuracy where system-level power management compensates for missing SHDN. |
Compared with MAX6037CAUK33-T, MAX6035BAUT33+T trades shutdown capability for lower operating current and better initial accuracy, while ADR3433ARJZ-R7 offers superior precision and stability but demands external power sequencing - making MAX6037CAUK33-T optimal for automotive and portable designs needing integrated, verified low-power control.
Availability
MAX6037CAUK33-T is available at Aetrix Electronics and suitable for portable medical sensors, automotive cabin controllers, and wireless sensor nodes requiring stable component supply with full traceability and lifecycle support.
Supply support for MAX6037CAUK33-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 integrated shutdown for battery-critical and thermally harsh environments - targeting portable instrumentation, automotive subsystems, and industrial sensing.
FAQ
What is the minimum input voltage required for MAX6037CAUK33-T to regulate properly?
The MAX6037CAUK33-T requires a minimum input voltage of 3.5V to maintain regulation at 3.3V output, as specified in its electrical characteristics table. This 200mV headroom ensures stable operation across temperature and load variations, and aligns with its 100mV max dropout specification at 1mA. Operating below 3.5V risks loss of regulation and increased output error.
Can MAX6037CAUK33-T be used with ceramic output capacitors?
Yes, MAX6037CAUK33-T is explicitly characterized for stable operation with ceramic capacitors ranging from 0.02µF to 1µF, including X7R and C0G types. Its internal compensation eliminates the need for series resistance or specialized capacitor types, simplifying layout and reducing BOM count in space-constrained designs.
How does the shutdown function affect output behavior in MAX6037CAUK33-T?
When SHDN is pulled low, MAX6037CAUK33-T disables its internal reference core and output buffer, reducing supply current to ≤500nA and raising output impedance to >330kΩ. The output voltage collapses passively and does not actively drive low - requiring external pull-down if defined low-state behavior is needed in system sleep modes.
Is MAX6037CAUK33-T compatible with 1.8V logic-level microcontrollers?
No - MAX6037CAUK33-T's SHDN pin requires VENL ≤ 0.8V for recognition of logic-low and VENH ≥ 2.0V for logic-high, making it incompatible with 1.8V GPIOs that typically swing 0–1.8V. A level-shifter or open-drain buffer is required to interface with 1.8V controllers, whereas 3.3V or 5V MCUs can drive SHDN directly.
What is the thermal hysteresis specification for MAX6037CAUK33-T?
MAX6037CAUK33-T exhibits 514ppm thermal hysteresis - defined as the change in output voltage at +25°C before and after cycling between -40°C and +125°C. This value reflects mechanical stress memory in the silicon and packaging, and is critical for applications requiring repeatable measurements after thermal excursions, such as automotive diagnostics or field-deployed test equipment.
MAX6037CAUK33-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):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- 19µVp-p
- Noise - 10Hz to 10kHz:
- 45µVrms
- Voltage - Input:
- 3.5V ~ 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
MAX6037CAUK33-T FAQ
1.How can I place an order for MAX6037CAUK33-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6037CAUK33-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 MAX6037CAUK33-T reliable?
The price and inventory of MAX6037CAUK33-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6037CAUK33-T is usually 5 days.
3.What payment methods are accepted for MAX6037CAUK33-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6037CAUK33-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6037CAUK33-T?
MAX6037CAUK33-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6037CAUK33-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 MAX6037CAUK33-T?
For technical support, including MAX6037CAUK33-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6037CAUK33-T requirements.
6.How does Aetrix verify that MAX6037CAUK33-T is sourced from the original manufacturer or authorized distributors?
All MAX6037CAUK33-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 MAX6037CAUK33-T meets industry standards.
7.What is the process for return or replacement of MAX6037CAUK33-T?
All MAX6037CAUK33-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6037CAUK33-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 MAX6037CAUK33-T part is unused and in its original packaging.
Return procedure for MAX6037CAUK33-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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