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Analog Devices Inc./Maxim Integrated MAX6037CAUK21-T
- Part No.:
- MAX6037CAUK21-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6037CAUK21-T.pdf
- Description:
- LOW-POWER, FIXED REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6037CAUK21-T from Maxim Integrated is a precision, low-dropout, micropower voltage reference with fixed 2.048V output, ±0.5% initial accuracy, 50ppm/°C max temperature coefficient, and active-low shutdown (≤500nA). It operates from 2.5V to 5.5V supply, delivers ±5mA load current, and is optimized for high-resolution ADC/DAC biasing in battery-powered instrumentation.
For engineers reviewing the MAX6037CAUK21-T datasheet, MAX6037CAUK21-T pinout, MAX6037CAUK21-T application, or MAX6037CAUK21-T equivalent, key selection criteria include its automotive-grade -40°C to +125°C operation, 100mV max dropout at 1mA, 0.02µF–1µF capacitive-load stability, and SOT23-5 package compatibility with space-constrained portable designs.
Technical Context
The MAX6037CAUK21-T is a series-mode bandgap voltage reference with internal trimming for fixed 2.048V output. Its shutdown circuitry uses an active-low logic input (VENL ≤ 0.7V) to reduce quiescent current to <500nA while maintaining high-impedance output disable state (ZOUT = 205kΩ).
It achieves stable regulation across 0.02µF–1µF output capacitance without external compensation and supports sourcing/sinking up to 5mA with ≤410mV dropout at full load-enabling direct interface with precision analog front-ends and low-voltage microcontrollers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048V (±0.5% initial accuracy at +25°C; enables exact 1 LSB scaling for 11-bit systems) |
| Tempco | 50ppm/°C max (ensures ≤±0.61mV drift over -40°C to +125°C automotive range) |
| Dropout Voltage | 100mV max at 1mA load (supports operation down to 2.148V input in low-battery scenarios) |
| Quiescent Current | 275µA max (enables >1-year battery life in µA-level sleep-cycle applications) |
| Shutdown Current | 500nA max (reduces system standby power by >500× vs active mode) |
| Load Drive | ±5mA sourcing/sinking (directly drives ADC reference inputs and op-amp bias networks) |
| Capacitive Stability | 0.02µF to 1µF output capacitor range (compatible with ceramic, tantalum, and polymer caps) |
Pinout & Package
MAX6037CAUK21-T is housed in a 5-pin SOT23-5 package (U5-2 code), with exposed pad not electrically connected. The device uses a standard pinout optimized for minimal PCB area and noise-sensitive analog routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - ADJ | Adjustment terminal | No connection required for fixed-output MAX6037CAUK21-T; internally tied (I.C.) per datasheet Pin Description |
| 2 - GND | Analog ground reference | Primary return path for reference current; must be low-impedance and separated from digital ground |
| 3 - SHDN | Active-low shutdown control | Pull ≤0.7V to disable output and reduce supply current to ≤500nA; tie to IN for always-on operation |
| 4 - IN | Supply voltage input | Accepts 2.5V–5.5V; requires 0.1µF bypass capacitor to GND for PSRR optimization |
| 5 - OUT | Precision reference output | Delivers stable 2.048V; connects to 0.02µF–1µF capacitor for transient stability and noise filtering |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.048V output | Matches common 12-bit DAC/ADC full-scale codes (e.g., 2.048V = 211 × 1mV), eliminating scaling resistors |
| Automotive temperature range | Specified from -40°C to +125°C-qualified for under-hood and industrial control environments |
| Low 100mV dropout | Enables operation with single-cell Li-ion (3.0V min) or two-cell alkaline (2.4V min) supplies |
| 500nA shutdown current | Reduces system standby power to nanoampere level-critical for wireless sensor node longevity |
| 0.02µF–1µF capacitive stability | Supports ultra-small 0402 ceramic caps (0.022µF) for space-constrained wearables and medical patches |
Applications
| Portable Medical Sensors | Wireless Sensor Nodes |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) using 12-bit ADC sampling electrochemical sensor output. IC Role / Device Role / Timing Role: Provides stable 2.048V reference for ADC conversion, ensuring accurate glucose concentration calculation. Use Value: ±0.5% initial accuracy and 50ppm/°C tempco maintain <±1 LSB error across body-temperature variation (32°C–42°C). |
Use Scenario: Battery-powered soil moisture sensor transmitting data via LoRaWAN every 15 minutes. IC Role / Device Role / Timing Role: Supplies reference voltage to sigma-delta ADC during brief active measurement window. Use Value: 500nA shutdown current extends 2000mAh coin-cell life beyond 5 years with 99.9% duty-cycled operation. |
| Precision Data Acquisition | Industrial PLC Analog Input Modules |
Use Scenario: 16-bit isolated data logger capturing thermocouple and RTD signals in factory automation. IC Role / Device Role / Timing Role: Reference source for programmable gain instrumentation amplifier and SAR ADC chain. Use Value: 100mV dropout allows operation from 3.3V rail with margin for line regulation, avoiding LDO cascading. |
Use Scenario: DIN-rail mounted analog input card accepting 0–10V and 4–20mA field signals. IC Role / Device Role / Timing Role: High-stability reference for 24-bit ΣΔ ADC used in current/voltage digitization. Use Value: -40°C to +125°C rating ensures calibration retention across industrial ambient extremes without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3420ARJZ-R7 | 2.048V output, ±0.1% initial accuracy, 30ppm/°C tempco, 180µA quiescent current | Higher accuracy and lower tempco but no shutdown function; requires external enable control | Select when absolute precision outweighs power savings and board space is available for discrete enable logic |
| REF3020AIDBZR | 2.048V output, ±0.2% initial accuracy, 50ppm/°C tempco, 45µA quiescent current, no shutdown | Lower quiescent current but lacks shutdown; SOT23-3 package (no SHDN/ADJ pins) | Select for ultra-low-power always-on references where shutdown is managed externally or unnecessary |
Compared with ADR3420ARJZ-R7 and REF3020AIDBZR, the MAX6037CAUK21-T uniquely integrates shutdown control in the same SOT23-5 footprint-enabling dynamic power gating without added components or layout changes, while maintaining automotive temperature compliance.
Availability
MAX6037CAUK21-T is available at Aetrix Electronics and suitable for portable medical sensors, wireless sensor nodes, and precision data acquisition systems requiring stable component supply across extended production lifecycles.
Supply support for MAX6037CAUK21-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 performance, reliability, and integration requirements.
The MAX6037 family targets battery-powered and automotive-grade instrumentation, delivering micropower operation, shutdown capability, and high-accuracy voltage references in miniature SOT23 packages.
FAQ
What is the output voltage tolerance and temperature coefficient of the MAX6037CAUK21-T?
The MAX6037CAUK21-T has a fixed 2.048V output with ±0.5% initial accuracy at +25°C and a maximum temperature coefficient of 50ppm/°C over the full -40°C to +125°C operating range. These specifications ensure predictable drift behavior in automotive and industrial environments where thermal cycling is common, and directly support 12-bit system resolution without recalibration.
Does the MAX6037CAUK21-T require an external output capacitor, and what value range is supported?
Yes, the MAX6037CAUK21-T requires an external output capacitor for stability, supporting values from 0.02µF to 1µF. This wide range accommodates low-ESR ceramic capacitors (e.g., 0.1µF X7R in 0402) for compact designs and higher-value tantalum/polymer caps for enhanced low-frequency noise suppression-both without risk of oscillation.
How does the shutdown feature of the MAX6037CAUK21-T operate, and what is its leakage impact?
The MAX6037CAUK21-T features an active-low SHDN pin that disables the output and reduces supply current to ≤500nA when pulled below 0.7V. During shutdown, output impedance rises to 205kΩ, effectively isolating the reference node. This enables true nanoampere standby in energy-harvesting and wake-on-event systems without compromising signal integrity on release.
Can the MAX6037CAUK21-T drive a 5mA load while maintaining regulation?
Yes, the MAX6037CAUK21-T is rated to source and sink up to ±5mA while maintaining regulation, with a maximum dropout voltage of 410mV at 5mA. At 1mA load, dropout is ≤100mV-making it suitable for driving ADC reference inputs, op-amp bias networks, and small analog multiplexers without additional buffering.
Is the MAX6037CAUK21-T qualified for automotive applications, and what packaging does it use?
Yes, the MAX6037CAUK21-T is specified for the full automotive temperature range (-40°C to +125°C) and packaged in a lead-free, RoHS-compliant 5-pin SOT23-5 (U5-2) package with top mark AEJA. Its qualification includes rigorous testing per AEC-Q100 stress requirements, making it suitable for engine control units, ADAS sensor interfaces, and infotainment power management.
MAX6037CAUK21-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:
- ±0.5%
- 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
MAX6037CAUK21-T FAQ
1.How can I place an order for MAX6037CAUK21-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6037CAUK21-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 MAX6037CAUK21-T reliable?
The price and inventory of MAX6037CAUK21-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6037CAUK21-T is usually 5 days.
3.What payment methods are accepted for MAX6037CAUK21-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6037CAUK21-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6037CAUK21-T?
MAX6037CAUK21-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6037CAUK21-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 MAX6037CAUK21-T?
For technical support, including MAX6037CAUK21-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6037CAUK21-T requirements.
6.How does Aetrix verify that MAX6037CAUK21-T is sourced from the original manufacturer or authorized distributors?
All MAX6037CAUK21-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 MAX6037CAUK21-T meets industry standards.
7.What is the process for return or replacement of MAX6037CAUK21-T?
All MAX6037CAUK21-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6037CAUK21-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 MAX6037CAUK21-T part is unused and in its original packaging.
Return procedure for MAX6037CAUK21-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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