My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6037CAUK21
- Part No.:
- MAX6037CAUK21
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6037CAUK21.pdf
- Description:
- LOW-POWER, FIXED REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:737
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6037CAUK21 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, 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 high-resolution ADC/DAC biasing in portable medical sensors and battery-powered wireless LAN modules.
For engineers reviewing the MAX6037CAUK21 datasheet, MAX6037CAUK21 pinout, MAX6037CAUK21 application, or MAX6037CAUK21 equivalent, this page provides verified electrical specifications, SOT23-5 terminal mapping, automotive-grade (-40°C to +125°C) performance data, and validated alternative options for precision analog signal chains requiring stable 2.048V references.
Technical Context
The MAX6037CAUK21 is a series-mode bandgap voltage reference with internal trimming for fixed 2.048V output. Its architecture enables low quiescent current (275µA max) independent of input voltage across 2.5V–5.5V, and supports capacitive-load stability from 0.02µF to 1µF without external compensation.
Shutdown is implemented via an active-low logic input (SHDN), which disables the output and reduces supply current to ≤500nA. The device features rail-to-rail sourcing/sinking capability (±5mA), low thermal hysteresis (458ppm), and long-term stability of 133ppm over 1000 hours - critical for calibration-critical systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048V ±0.5% (max initial error at +25°C; supports 16-bit system accuracy) |
| Tempco | 50ppm/°C max (ensures ≤±0.61mV drift over -40°C to +125°C) |
| Dropout Voltage | 100mV max at 1mA load (enables operation with VIN as low as 2.148V) |
| Quiescent Current | 275µA max (supports multi-year battery life in always-on sensor nodes) |
| Shutdown Current | 500nA max (reduces standby power by >500× vs active mode) |
| Load Drive | ±5mA sourcing/sinking (directly drives ADC reference inputs and op-amp buffers) |
| Noise (10Hz–1kHz) | 25µVRMS (low enough for 16-bit SAR ADCs without additional filtering) |
Pinout & Package
MAX6037CAUK21 is housed in a 5-pin SOT23-5 package (U5-2 code, top mark AEJA), optimized for space-constrained PCB layouts and automotive thermal cycling. Pin 1 is ADJ (internally connected, no external connection); pins 2–5 are GND, SHDN, IN, and OUT respectively.
| 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 node; separates reference return from digital/power grounds |
| 3 (SHDN) | Active-low enable control | Pull low to disable output; pull high (to IN) for normal operation; logic thresholds: VENL ≤ 0.7V, VENH ≥ 2.0V |
| 4 (IN) | Supply input | Accepts 2.5V–5.5V; requires 0.1µF bypass capacitor to GND for PSRR optimization |
| 5 (OUT) | Precision reference output | Delivers 2.048V; stable with 0.02µF–1µF output capacitance; connects to ADC REF+ or DAC VREF |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.048V output | Matches standard 16-bit full-scale ADC reference (216 = 65536 steps @ 2.048V = 31.25µV/LSB) |
| Automotive temperature range | Guaranteed operation from -40°C to +125°C without derating - suitable for under-hood or industrial edge nodes |
| Low 100mV dropout | Enables use with single-cell Li-ion (3.0V min) or dual-cell alkaline (2.4V min) supplies while maintaining regulation |
| 500nA shutdown current | Extends battery life in intermittent-sampling applications (e.g., wearable ECG monitors) |
| 0.02µF–1µF capacitive-load stability | Eliminates need for external compensation; compatible with ceramic, tantalum, and polymer output caps |
Applications
| Portable Medical Sensors | Wireless LAN Transceivers |
|---|---|
|
Use Scenario: Battery-powered pulse oximeter with 16-bit ADC digitizing photodiode current. IC Role / Device Role / Timing Role: Provides stable 2.048V reference for ADC conversion, directly determining measurement resolution and gain accuracy. Use Value: ±0.5% initial accuracy and 50ppm/°C tempco ensure <±0.1% total error over temperature - meeting ISO 80601 clinical accuracy requirements. |
Use Scenario: 2.4GHz Wi-Fi transceiver IC requiring precise VCO tuning voltage and RF front-end biasing. IC Role / Device Role / Timing Role: Supplies clean, low-noise 2.048V reference to DAC generating VCO control voltage and LNA bias points. Use Value: 25µVRMS noise and 5mA drive capability prevent phase noise degradation and support fast settling during channel switching. |
| Precision Data Acquisition Systems | Industrial Process Monitoring |
|
Use Scenario: 4–20mA loop-powered transmitter with integrated 16-bit ΣΔ ADC for pressure sensor readout. IC Role / Device Role / Timing Role: Serves as master reference for both ADC and DAC in closed-loop current output circuitry. Use Value: ±5mA sourcing/sinking and rail-to-rail drive eliminate need for external buffers, reducing BOM count and layout area. |
Use Scenario: DIN-rail mounted temperature transmitter operating in factory environments with wide ambient swings. IC Role / Device Role / Timing Role: Generates calibrated 2.048V reference for sensor signal conditioning and microcontroller ADC. Use Value: -40°C to +125°C guaranteed operation and 133ppm long-term stability ensure 5+ year calibration validity without field recalibration. |
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, 180µA IQ, SOT23-5 | Higher accuracy and lower tempco, but no shutdown function | Select when ultra-stable reference is prioritized over power gating |
| REF3020AIDBZR | 2.048V, ±0.2% initial accuracy, 50ppm/°C, 45µA IQ, SOT23-3 (no SHDN pin) | Lower quiescent current, but no shutdown control and 3-pin package limits flexibility | Select for lowest static power in always-on systems where shutdown is unnecessary |
Compared with ADR3420ARJZ-R7 and REF3020AIDBZR, MAX6037CAUK21 uniquely combines automotive temperature rating, integrated shutdown, and ±5mA drive in a 5-pin SOT23 - making it optimal for battery-operated, calibration-critical systems requiring both precision and power-state control.
Availability
MAX6037CAUK21 is available at Aetrix Electronics and suitable for portable medical sensors, wireless LAN transceivers, and industrial process monitoring requiring stable component supply with guaranteed automotive-grade performance and traceable lot history.
Supply support for MAX6037CAUK21 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 delivers low-power, high-accuracy voltage references with shutdown for battery-sensitive systems - specifically engineered for 16-bit data converters, portable instrumentation, and automotive sensor interfaces.
FAQ
What is the output voltage tolerance and temperature coefficient of MAX6037CAUK21?
The MAX6037CAUK21 has a fixed 2.048V output with ±0.5% initial accuracy at +25°C and a maximum temperature coefficient of 50ppm/°C over -40°C to +125°C. This means its output drift is bounded to ±0.61mV across the full automotive temperature range, enabling reliable 16-bit system performance without recalibration.
Does MAX6037CAUK21 require an external capacitor on the output pin?
Yes, MAX6037CAUK21 requires an output capacitor between 0.02µF and 1µF connected from OUT to GND for stability. Ceramic capacitors are recommended. The device is designed to remain stable across this full range without additional series resistance or compensation networks - simplifying layout and reducing BOM cost.
How does the shutdown feature work on MAX6037CAUK21?
MAX6037CAUK21 uses an active-low SHDN pin (Pin 3). Pulling SHDN ≤0.7V disables the reference output and reduces supply current to ≤500nA. For normal operation, connect SHDN to IN (Pin 4). Logic thresholds are specified over full supply range (2.5V–5.5V), ensuring robust interfacing with microcontrollers and PMICs.
Can MAX6037CAUK21 drive a 16-bit SAR ADC reference input directly?
Yes, MAX6037CAUK21 can directly drive typical 16-bit SAR ADC reference inputs. With ±5mA sourcing/sinking capability, 25µVRMS noise (10Hz–1kHz), and 100mV dropout, it maintains accuracy and settles rapidly (<2ms turn-on time with 0.02µF COUT) - eliminating need for external buffers in most precision acquisition designs.
What is the minimum input voltage required for MAX6037CAUK21 to regulate at 2.048V?
The minimum input voltage for MAX6037CAUK21 is 2.5V, per datasheet specification. At 1mA load, its 100mV max dropout ensures regulation begins at VIN ≥ 2.148V - however, the 2.5V minimum is guaranteed for full parameter compliance including line regulation, tempco, and noise performance across temperature.
MAX6037CAUK21 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 FAQ
1.How can I place an order for MAX6037CAUK21 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6037CAUK21 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 reliable?
The price and inventory of MAX6037CAUK21 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6037CAUK21 is usually 5 days.
3.What payment methods are accepted for MAX6037CAUK21?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6037CAUK21 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6037CAUK21?
MAX6037CAUK21 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6037CAUK21 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?
For technical support, including MAX6037CAUK21 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6037CAUK21 requirements.
6.How does Aetrix verify that MAX6037CAUK21 is sourced from the original manufacturer or authorized distributors?
All MAX6037CAUK21 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 meets industry standards.
7.What is the process for return or replacement of MAX6037CAUK21?
All MAX6037CAUK21 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6037CAUK21, 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 part is unused and in its original packaging.
Return procedure for MAX6037CAUK21:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6037CAUK21 Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
