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Analog Devices Inc./Maxim Integrated MAX6037BAUK25
- Part No.:
- MAX6037BAUK25
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6037BAUK25.pdf
- Description:
- LOW-POWER, FIXED REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:390
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Product details
Overview
MAX6037BAUK25 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 medical sensors.
For engineers reviewing the MAX6037BAUK25 datasheet, MAX6037BAUK25 pinout, MAX6037BAUK25 application, or MAX6037BAUK25 equivalent, key selection criteria include automotive-grade (-40°C to +125°C) operation, SOT23-5 package compatibility, capacitive-load stability (0.02µF–1µF), and shutdown logic thresholds (VENL ≤ 0.75V, VENH ≥ 2.0V).
Technical Context
The MAX6037BAUK25 is a series-mode bandgap voltage reference with internal trimming for 2.5V nominal output. Its shutdown circuitry uses an active-low CMOS input that disables the reference core and reduces quiescent current to sub-500nA while raising output impedance to >250kΩ.
It features a low-noise architecture (30µVRMS, 10Hz–1kHz), stable performance across 0.02µF–1µF output capacitance, and load regulation of ≤0.036%/mA sourcing up to 5mA-enabling direct interface with SAR ADC references and low-power microcontroller analog peripherals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±0.3% at +25°C - ensures accurate 12-bit+ ADC full-scale reference without calibration. |
| Tempco | ≤50ppm/°C - limits drift to <±625µV over -40°C to +125°C, critical for automotive sensor signal chains. |
| Dropout Voltage | ≤100mV at 1mA - supports operation down to 2.6V supply, enabling use with single Li-ion or dual alkaline cells. |
| Quiescent Current | ≤275µA - extends battery life in portable ECG monitors and wireless pulse oximeters. |
| Shutdown Current | ≤500nA - reduces standby power by >500×, essential for energy-harvesting IoT nodes. |
| Load Drive | ±5mA sourcing/sinking - directly drives ADC reference inputs and op-amp bias networks without buffering. |
| Capacitive Stability | 0.02µF to 1µF - accommodates ceramic decoupling and eliminates need for external compensation. |
Pinout & Package
MAX6037BAUK25 is housed in a 5-pin SOT23-5 package (U5-2 code, top mark AEJG), with exposed pad not connected. Pin 1 is ADJ (internally connected, no external connection), Pin 2 is GND, Pin 3 is SHDN (active-low), Pin 4 is IN (2.7V–5.5V supply), and Pin 5 is OUT (2.5V 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; separates reference from digital noise. |
| 3 (SHDN) | Active-low enable control | Pull ≤0.75V to disable output; tie to IN for always-on operation. |
| 4 (IN) | Supply input | Requires 0.1µF bypass capacitor to GND; minimum 2.7V for 2.5V output. |
| 5 (OUT) | Precision reference output | Delivers 2.5V ±0.3%; connect 0.02–1µF capacitor to GND for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive temperature range | Specified from -40°C to +125°C - qualified for under-hood and cabin electronics without derating. |
| Low dropout voltage | 100mV max at 1mA - enables operation with minimal headroom, reducing LDO overhead in multi-rail systems. |
| Shutdown leakage suppression | 500nA max shutdown current - preserves battery charge during sleep modes in portable diagnostics. |
| Capacitive-load tolerance | Stable with 0.02µF–1µF ceramic capacitors - eliminates need for tantalum or special ESR requirements. |
| High PSRR | ≥60dB at 1kHz - rejects switching regulator ripple, improving ADC effective resolution in noisy power domains. |
Applications
| Medical Sensor Front-End | Portable Data Logger |
|---|---|
|
Use Scenario: Precision measurement of biopotentials (ECG, EEG) using 16-bit SAR ADCs. IC Role / Device Role / Timing Role: Provides stable 2.5V reference for ADC full-scale range and op-amp biasing. Use Value: ±0.3% initial accuracy and 50ppm/°C tempco ensure <±1 LSB error over automotive temperature range. |
Use Scenario: Battery-powered environmental monitoring node logging temperature/humidity every 5 minutes. IC Role / Device Role / Timing Role: Supplies reference voltage to ADC and enables ultra-low-power shutdown between samples. Use Value: 500nA shutdown current extends 2xAA battery life to >5 years in duty-cycled operation. |
| Wireless Sensor Transmitter | Industrial PLC Analog Input Module |
|
Use Scenario: Sub-GHz RF sensor transmitting calibrated analog readings via LoRaWAN. IC Role / Device Role / Timing Role: References signal conditioning amplifier and ADC in transmit-ready state. Use Value: 275µA quiescent current minimizes average power draw during active sensing phase. |
Use Scenario: DIN-rail mounted controller acquiring 4–20mA loop signals with 12-bit isolation. IC Role / Device Role / Timing Role: Generates local 2.5V reference for isolated ADC on field-side PCB. Use Value: SOT23-5 package allows compact layout in space-constrained industrial modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3425BRJZ-R7 | ±0.1% initial accuracy, 30ppm/°C tempco, 180µA quiescent current, no shutdown | Lacks shutdown function; higher accuracy but no power-gating capability | Select when highest DC precision is required and continuous operation is acceptable. |
| REF3025AIDBZR | ±0.2% initial accuracy, 50ppm/°C tempco, 45µA quiescent current, no shutdown | Lower quiescent current but no shutdown; SOT23-3 package (no SHDN pin) | Select for ultra-low-quiescent designs where shutdown is managed externally or not needed. |
Compared with ADR3425BRJZ-R7 and REF3025AIDBZR, the MAX6037BAUK25 uniquely combines automotive temperature rating, integrated shutdown, and SOT23-5 pinout-making it optimal for battery-powered, thermally demanding applications requiring both precision and power gating.
Availability
MAX6037BAUK25 is available at Aetrix Electronics and suitable for medical sensor front-ends, portable data loggers, and industrial PLC analog input modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6037BAUK25 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 high-performance analog and mixed-signal ICs for precision, power, and interface applications.
The MAX6037 family delivers low-power, high-accuracy voltage references with shutdown for battery-operated and automotive systems demanding robustness across -40°C to +125°C.
FAQ
What is the maximum input voltage for MAX6037BAUK25?
The MAX6037BAUK25 supports a supply voltage range of 2.7V to 5.5V. Exceeding 5.5V may cause permanent damage, as specified in the Absolute Maximum Ratings. Operation above 5.5V violates design limits and risks junction failure.
Does MAX6037BAUK25 require an output capacitor?
Yes, MAX6037BAUK25 requires an output capacitor between OUT and GND, sized from 0.02µF to 1µF, for stability. Ceramic capacitors are recommended. Omitting it may cause oscillation or degraded load regulation performance.
Can MAX6037BAUK25 drive a 10kΩ load directly?
Yes, MAX6037BAUK25 can drive a 10kΩ load directly: at 2.5V output, this draws only 250µA, well within its ±5mA sourcing/sinking capability and maintaining output accuracy per load regulation specs (≤0.036%/mA).
What is the logic threshold for the SHDN pin on MAX6037BAUK25?
The SHDN pin on MAX6037BAUK25 has a logic-low threshold (VENL) of ≤0.75V and logic-high threshold (VENH) of ≥2.0V, valid when VIN is 2.7V–5.5V. This ensures reliable interfacing with 3.3V and 5V GPIOs.
Is MAX6037BAUK25 pin-compatible with other MAX6037 variants?
Yes, all MAX6037 variants-including MAX6037BAUK25-share identical 5-pin SOT23-5 packaging and pinout (IN, GND, SHDN, OUT, ADJ). Only the ADJ pin function differs: internally connected in fixed-output versions like MAX6037BAUK25.
MAX6037BAUK25 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):
- 2.5V
- 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 FAQ
1.How can I place an order for MAX6037BAUK25 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6037BAUK25 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 reliable?
The price and inventory of MAX6037BAUK25 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6037BAUK25 is usually 5 days.
3.What payment methods are accepted for MAX6037BAUK25?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6037BAUK25 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6037BAUK25?
MAX6037BAUK25 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6037BAUK25 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?
For technical support, including MAX6037BAUK25 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6037BAUK25 requirements.
6.How does Aetrix verify that MAX6037BAUK25 is sourced from the original manufacturer or authorized distributors?
All MAX6037BAUK25 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 meets industry standards.
7.What is the process for return or replacement of MAX6037BAUK25?
All MAX6037BAUK25 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6037BAUK25, 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 part is unused and in its original packaging.
Return procedure for MAX6037BAUK25:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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