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Analog Devices Inc./Maxim Integrated MAX6037AAUK21+T
- Part No.:
- MAX6037AAUK21+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6037AAUK21+T.pdf
- Description:
- IC VREF SERIES 2.048V SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,717
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Product details
Overview
MAX6037AAUK21+T from Maxim Integrated is a low-dropout, micropower voltage reference IC with fixed 2.048V output, ±0.2% initial accuracy, 25ppm/°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, serving as a precision reference in battery-powered data acquisition systems.
For engineers reviewing the MAX6037AAUK21+T datasheet, MAX6037AAUK21+T pinout, MAX6037AAUK21+T application, or MAX6037AAUK21+T equivalent, key selection criteria include its A-grade accuracy and tempco, SOT23-5 footprint compatibility, shutdown leakage performance, and capacitive-load stability range (0.02µF–1µF) for ADC biasing and sensor excitation circuits.
Technical Context
The MAX6037AAUK21+T implements a series-mode bandgap reference architecture with integrated active-low shutdown control logic. Its internal circuitry maintains regulation across the full -40°C to +125°C automotive temperature range while sustaining <275µA quiescent current and <500nA shutdown current.
It features a dedicated ADJ pin only on the adjustable variant; this fixed-output device internally connects pin 1 (ADJ) and leaves it unconnected. Output stability is guaranteed with capacitive loads from 0.02µF to 1µF, and it supports both sourcing and sinking up to 5mA without compromising voltage accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048V ±0.2% (max) at +25°C - enables direct interface with 12-bit ADCs requiring 2.048V full-scale reference |
| Tempco | 25ppm/°C (max) - ensures ≤±0.31% output drift over -40°C to +125°C for automotive-grade stability |
| Dropout Voltage | 100mV (max) at 1mA - allows operation from 2.148V supply, critical for single-cell Li-ion or coin-cell systems |
| Quiescent Current | 275µA (max) - supports >1-year battery life in always-on portable medical sensors |
| Shutdown Current | 500nA (max) - reduces system standby power to sub-µW levels when disabled |
| Load Drive | ±5mA - directly biases resistive bridges, op-amp references, or SAR ADC input buffers without external buffering |
| Capacitive Load Range | 0.02µF to 1µF - accommodates ceramic, tantalum, or polymer output caps for EMI-sensitive applications |
Pinout & Package
MAX6037AAUK21+T is housed in a 5-pin SOT23-5 package (U5-2 code, top mark AEIY), with pin 1 internally connected and not bonded out - no external connection required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (ADJ) | Internally connected (NC) | No external connection; unused in fixed-output variants - must be left floating or grounded per layout best practice |
| 2 (GND) | Reference ground return | Low-impedance analog ground path; requires dedicated PCB pour and star grounding for <10µV noise |
| 3 (SHDN) | Active-low enable control | Pull ≤0.7V to disable output; ≥2.0V to enable - compatible with 3.3V/5V GPIO without level-shifting |
| 4 (IN) | Supply input | Accepts 2.5V–5.5V; requires 0.1µF bypass capacitor to GND within 2mm of pin for PSRR optimization |
| 5 (OUT) | Precision reference output | Delivers stable 2.048V; connect 0.02–1µF capacitor to GND to ensure stability and reduce broadband noise |
Key Features
| Feature | Design Value |
|---|---|
| A-grade accuracy | ±0.2% initial tolerance - eliminates post-manufacturing calibration in portable instrumentation |
| Automotive temperature range | -40°C to +125°C operation - qualified for under-hood and industrial control module deployment |
| Low dropout | 100mV max at 1mA - enables use with buck regulators set to 2.15V, minimizing wasted headroom |
| Shutdown mode | ≤500nA supply current - extends battery life in intermittent-sampling IoT nodes |
| Capacitive-load tolerant | Stable with 0.02µF–1µF output caps - supports small-footprint 0402 ceramics for space-constrained wearables |
Applications
| Portable Medical Sensors | Wireless Sensor Nodes |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) using 12-bit ADC for analog front-end signal digitization. IC Role / Device Role / Timing Role: Provides precise 2.048V reference for ADC full-scale range, ensuring accurate glucose concentration calculation. Use Value: ±0.2% initial accuracy and 25ppm/°C tempco maintain <0.5% total error over body temperature range (32–42°C), meeting ISO 15197 clinical requirements. | Use Scenario: Battery-powered soil moisture sensor transmitting via LoRaWAN every 15 minutes. IC Role / Device Role / Timing Role: Supplies stable reference to analog sensor interface during brief 100ms measurement burst. Use Value: 500nA shutdown current extends CR2032 battery life beyond 5 years; 100mV dropout allows operation down to 2.15V cell voltage. |
| Precision Data Loggers | Industrial Process Transmitters |
Use Scenario: Handheld vibration analyzer capturing accelerometer signals with 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Reference source for ADC and excitation current DAC in bridge-based piezoelectric sensing. Use Value: 0.02–1µF capacitive-load compatibility permits use of low-ESR ceramic caps, reducing 1/f noise below 10Hz for sub-mg resolution. | Use Scenario: 4–20mA loop-powered pressure transmitter operating in factory environments. IC Role / Device Role / Timing Role: Stable 2.048V reference for DAC generating precise current-loop setpoints. Use Value: -40°C to +125°C rating ensures accuracy retention across ambient extremes; ±5mA drive eliminates need for external buffer op-amp. |
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, ±0.1% initial accuracy, 30ppm/°C max tempco, 180µA quiescent current, no shutdown | Lacks shutdown function; higher accuracy but wider tempco; requires external enable circuitry for power gating | Select when absolute initial accuracy is prioritized over ultra-low standby power and shutdown integration |
| REF3020AIDBZR | 2.048V, ±0.2% initial accuracy, 50ppm/°C max tempco, 45µA quiescent current, no shutdown | Lower quiescent current but double the tempco; SOT23-3 package (no SHDN pin); unsuitable for automotive temp range | Select for ultra-low-power always-on applications where temperature variation is limited to 0–70°C |
Compared with ADR3420ARJZ-R7 and REF3020AIDBZR, the MAX6037AAUK21+T uniquely combines A-grade accuracy, automotive temperature support, integrated shutdown, and SOT23-5 pinout - making it optimal for battery-critical, wide-temperature embedded systems requiring minimal BOM count.
Availability
MAX6037AAUK21+T is available at Aetrix Electronics and suitable for portable medical sensors, wireless sensor nodes, precision data loggers, and industrial process transmitters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6037AAUK21+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 delivers low-power, high-accuracy voltage references with integrated shutdown - engineered specifically for battery-operated instrumentation, sensor interfaces, and automotive subsystems needing guaranteed performance from -40°C to +125°C.
FAQ
What is the output voltage tolerance and temperature coefficient of the MAX6037AAUK21+T?
The MAX6037AAUK21+T has an initial output voltage tolerance of ±0.2% at +25°C and a maximum temperature coefficient of 25ppm/°C over the full -40°C to +125°C operating range. These specifications are guaranteed for the 'A' grade variant and ensure stable 2.048V reference performance in automotive and industrial environments where thermal cycling is common. The MAX6037AAUK21+T meets these values without requiring external trimming.
Does the MAX6037AAUK21+T require an external output capacitor, and what is the recommended value?
Yes, the MAX6037AAUK21+T requires an external output capacitor for stability, with a specified range of 0.02µF to 1µF. A 0.1µF X7R ceramic capacitor placed within 2mm of the OUT and GND pins is recommended for optimal noise suppression and transient response. This capacitor mitigates high-frequency instability and reduces output noise - particularly important when driving ADC reference inputs or precision op-amps in the MAX6037AAUK21+T application.
How does the shutdown functionality work on the MAX6037AAUK21+T, and what is the typical shutdown current?
The MAX6037AAUK21+T features an active-low shutdown input (SHDN, pin 3): pulling this pin ≤0.7V disables the output and reduces supply current to ≤500nA (max), with typical values near 50pA. During shutdown, the output enters high-impedance state and the internal bandgap is disabled. To re-enable, drive SHDN ≥2.0V. This function enables ultra-low-power duty-cycled operation in battery-powered devices using the MAX6037AAUK21+T.
Can the MAX6037AAUK21+T drive a 5mA load while maintaining its specified accuracy?
Yes, the MAX6037AAUK21+T is rated to source and sink up to ±5mA while maintaining output voltage accuracy within its specified limits - including line and load regulation. At 5mA sourcing, dropout remains ≤410mV (tested at VOUT = 5V on adjustable variant; fixed 2.048V version exhibits lower dropout), and load regulation is ≤0.044%/mA. This capability allows direct interfacing with op-amp bias networks or ADC reference buffers without external amplification in the MAX6037AAUK21+T application.
Is the MAX6037AAUK21+T pin-compatible with other members of the MAX6037 family, such as the MAX6037AAUK33+T?
Yes, all MAX6037 family variants - including MAX6037AAUK21+T, MAX6037AAUK33+T, and MAX6037AAUK12+T - share identical 5-pin SOT23-5 (U5-2) packaging and pinout. Pin assignments (GND, SHDN, IN, OUT, and NC ADJ) are consistent across fixed-output versions. This allows drop-in replacement between 1.25V, 2.048V, 2.5V, 3.0V, 3.3V, and 4.096V variants without PCB redesign, simplifying design reuse and voltage-scaling in systems using the MAX6037AAUK21+T.
MAX6037AAUK21+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):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 25ppm/°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
MAX6037AAUK21+T FAQ
1.How can I place an order for MAX6037AAUK21+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6037AAUK21+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 MAX6037AAUK21+T reliable?
The price and inventory of MAX6037AAUK21+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6037AAUK21+T is usually 5 days.
3.What payment methods are accepted for MAX6037AAUK21+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6037AAUK21+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6037AAUK21+T?
MAX6037AAUK21+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6037AAUK21+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 MAX6037AAUK21+T?
For technical support, including MAX6037AAUK21+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6037AAUK21+T requirements.
6.How does Aetrix verify that MAX6037AAUK21+T is sourced from the original manufacturer or authorized distributors?
All MAX6037AAUK21+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 MAX6037AAUK21+T meets industry standards.
7.What is the process for return or replacement of MAX6037AAUK21+T?
All MAX6037AAUK21+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6037AAUK21+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 MAX6037AAUK21+T part is unused and in its original packaging.
Return procedure for MAX6037AAUK21+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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