My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6037BAUK21+T
- Part No.:
- MAX6037BAUK21+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6037BAUK21+T.pdf
- Description:
- IC VREF SERIES 0.3% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,087
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6037BAUK21+T from Maxim Integrated is a precision 2.048V fixed-output, low-dropout voltage reference with active-low shutdown, ±0.3% initial accuracy, 50ppm/°C max temperature coefficient, 275µA max quiescent current, and operation from 2.5V to 5.5V supply - designed for high-accuracy ADC/DAC biasing in portable medical sensors and battery-powered wireless transceivers.
For engineers reviewing the MAX6037BAUK21+T datasheet, MAX6037BAUK21+T pinout, MAX6037BAUK21+T application, or MAX6037BAUK21+T equivalent, key selection criteria include output stability under capacitive loads (0.02–1µF), 5mA source/sink capability, shutdown current <500nA, automotive-grade -40°C to +125°C operation, and SOT23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6037BAUK21+T implements a series-mode bandgap reference architecture with integrated shutdown control logic. Its output is stabilized by internal compensation and supports direct connection to load capacitances from 0.02µF to 1µF without external components.
It features an active-low SHDN input that forces output disable and reduces supply current to ≤500nA; logic thresholds are VENH ≥2.0V and VENL ≤0.7V across full supply range. The device maintains ±0.3% output accuracy over -40°C to +125°C with no external trimming required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048V ±0.3% at +25°C - matches standard 12-bit DAC full-scale reference and enables direct interface with SAR ADCs requiring precise 2.048V bias. |
| Tempco | 50ppm/°C max - ensures ≤±0.61mV drift over -40°C to +125°C, critical for stable sensor signal conditioning in automotive environments. |
| Quiescent Current | 275µA max - enables >1-year battery life in coin-cell-powered IoT nodes when paired with low-power microcontrollers. |
| Shutdown Current | 500nA max - allows ultra-low-power sleep modes without compromising wake-up timing or reference settling. |
| Dropout Voltage | 100mV max at 1mA - permits operation from 2.148V supply, supporting single-cell LiFePO₄ or dual-cell alkaline systems. |
| Load Drive | ±5mA sourcing/sinking - eliminates need for external buffer in driving 10kΩ ADC input or 100pF sample-and-hold networks. |
| Capacitive Load Range | 0.02µF to 1µF - accommodates ceramic decoupling and EMI filtering without oscillation risk. |
Pinout & Package
MAX6037BAUK21+T is housed in a 5-pin SOT23-5 package (U5-2 code) with 1.6mm × 2.9mm footprint and 0.95mm height, optimized for automated placement and reflow soldering in high-density designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - I.C. | Internally connected (no external connection) | Unused pin for fixed-output variants; must remain unconnected to avoid parasitic coupling or latch-up. |
| 2 - GND | Analog ground reference | Low-impedance return path for reference current; requires dedicated ground plane connection to minimize noise injection. |
| 3 - SHDN | Active-low shutdown control input | Pull ≤0.7V to disable output; tie directly to IN for always-on operation; compatible with 1.8V/3.3V GPIO logic levels. |
| 4 - IN | Supply voltage input (2.5V–5.5V) | Must be bypassed with 0.1µF ceramic capacitor to GND; supports wide-input battery chemistries including Li-ion, LiFePO₄, and alkaline. |
| 5 - OUT | Precision 2.048V reference output | Drives ADC reference inputs, DAC bias, or comparator thresholds; stable with 0.02–1µF output capacitance. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.048V output | Matches industry-standard 12-bit full-scale voltage for seamless integration with SAR and sigma-delta ADCs without resistor scaling. |
| Automotive temperature range | Specified from -40°C to +125°C - qualified for under-hood and industrial control applications without derating. |
| Low dropout (100mV @ 1mA) | Enables operation from marginal supplies such as aging batteries or low-headroom LDO outputs while maintaining regulation. |
| 5mA source/sink capability | Directly drives typical ADC reference inputs (e.g., AD7980, ADS8860) and small-signal op-amp bias networks without buffering. |
| 0.02–1µF capacitive-load stability | Eliminates need for external compensation components, reducing BOM count and layout complexity in compact designs. |
Applications
| Portable Medical Sensors | Wireless LAN Transceivers |
|---|---|
|
Use Scenario: Battery-powered pulse oximeter with 12-bit ADC sampling analog photodiode signals. IC Role / Device Role / Timing Role: Provides stable 2.048V reference for ADC conversion, ensuring consistent gain calibration across temperature and battery discharge. Use Value: ±0.3% initial accuracy and 50ppm/°C tempco maintain ≤0.5 LSB error over full operating range, meeting ISO 80601 clinical accuracy requirements. |
Use Scenario: IEEE 802.11n Wi-Fi module using 12-bit RF DAC for I/Q baseband generation. IC Role / Device Role / Timing Role: Supplies precise 2.048V bias to DAC reference input, minimizing harmonic distortion in transmitted RF spectrum. Use Value: Low 275µA quiescent current extends battery runtime; 5mA drive capability avoids external op-amp buffer, saving board area. |
| Precision Industrial Regulators | Automotive Body Control Modules |
|
Use Scenario: Programmable 4–20mA transmitter with HART modulation requiring stable analog front-end references. IC Role / Device Role / Timing Role: Generates calibrated 2.048V reference for current-loop DAC and sensor signal conditioning amplifier. Use Value: 100mV dropout allows operation from 3.3V system rail with margin; long-term stability of 133ppm/1000h ensures calibration retention over product lifetime. |
Use Scenario: In-cabin occupancy sensor node with MEMS accelerometer and low-power MCU. IC Role / Device Role / Timing Role: Supplies reference voltage to ADC measuring sensor output, enabling accurate motion detection during vehicle ignition cycles. Use Value: -40°C to +125°C rating ensures functionality during cold starts and hot soak; shutdown mode draws <500nA during sleep, preserving battery charge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6037AAUK21+T | ±0.2% initial accuracy and 25ppm/°C tempco vs. ±0.3%/50ppm for MAX6037BAUK21+T | Better suited for 14-bit+ data acquisition where tighter tolerance is required | Select MAX6037AAUK21+T when absolute accuracy dominates cost sensitivity; MAX6037BAUK21+T offers optimal balance for 12-bit systems. |
| REF3020AIDBZR | 2.048V, ±0.2% accuracy, 50ppm/°C, but higher 50µA quiescent current and no shutdown function | Lacks active shutdown, limiting use in duty-cycled sensor nodes | Choose REF3020AIDBZR only if shutdown is unnecessary and lower supply current is not required; MAX6037BAUK21+T provides superior power management. |
Compared with MAX6037AAUK21+T, the MAX6037BAUK21+T trades 0.1% accuracy and 25ppm/°C tempco for lower cost and identical package/interface; versus REF3020AIDBZR, it adds shutdown control and cuts quiescent current by >80%, making it superior for battery longevity in intermittent-sampling applications.
Availability
MAX6037BAUK21+T is available at Aetrix Electronics and suitable for portable medical sensors, wireless LAN transceivers, precision industrial regulators, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6037BAUK21+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 micropower, high-accuracy voltage references with shutdown for battery-sensitive systems requiring stable biasing across extreme temperatures.
FAQ
What is the output voltage tolerance of the MAX6037BAUK21+T over temperature?
The MAX6037BAUK21+T guarantees ±0.3% initial accuracy at +25°C and a maximum temperature coefficient of 50ppm/°C over -40°C to +125°C. This results in total output variation of ≤±0.91% across the full automotive temperature range, calculated as ±0.3% + (50ppm/°C × 165°C) = ±0.91%, ensuring robust performance in engine bay or outdoor deployments.
Can the MAX6037BAUK21+T drive a 100pF capacitive load without instability?
Yes - the MAX6037BAUK21+T is specified to remain stable with output capacitance from 0.02µF to 1µF. A 100pF load falls well within this range and requires no additional compensation; the device's internal compensation ensures monotonic step response and absence of ringing in ADC sampling circuits.
What is the minimum input voltage required for the MAX6037BAUK21+T to regulate at 2.048V?
The minimum input voltage is 2.5V per datasheet specification. With a 100mV max dropout at 1mA, the device can maintain regulation down to VIN = VOUT + 100mV = 2.148V, but guaranteed operation begins at 2.5V - this accounts for line regulation, tempco, and process variation margins across temperature and supply conditions.
How does the shutdown feature of the MAX6037BAUK21+T affect output impedance?
When disabled via SHDN, the MAX6037BAUK21+T presents >10MΩ output impedance (per MAX6037_ADJ spec, applicable to all variants), effectively isolating the reference node. This prevents loading of downstream circuitry and eliminates leakage paths during sleep, unlike passive pull-down solutions which degrade accuracy upon wake-up.
Is the MAX6037BAUK21+T pin-compatible with other members of the MAX6037 family?
Yes - all MAX6037 variants, including MAX6037BAUK21+T, share identical 5-pin SOT23-5 (U5-2) packaging and pinout. Pin 1 is internally connected (I.C.), Pin 2 is GND, Pin 3 is SHDN, Pin 4 is IN, and Pin 5 is OUT - enabling drop-in replacement across fixed-output versions without PCB modification.
MAX6037BAUK21+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:
- Obsolete
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.3%
- 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
MAX6037BAUK21+T FAQ
1.How can I place an order for MAX6037BAUK21+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6037BAUK21+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 MAX6037BAUK21+T reliable?
The price and inventory of MAX6037BAUK21+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6037BAUK21+T is usually 5 days.
3.What payment methods are accepted for MAX6037BAUK21+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6037BAUK21+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6037BAUK21+T?
MAX6037BAUK21+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6037BAUK21+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 MAX6037BAUK21+T?
For technical support, including MAX6037BAUK21+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6037BAUK21+T requirements.
6.How does Aetrix verify that MAX6037BAUK21+T is sourced from the original manufacturer or authorized distributors?
All MAX6037BAUK21+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 MAX6037BAUK21+T meets industry standards.
7.What is the process for return or replacement of MAX6037BAUK21+T?
All MAX6037BAUK21+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6037BAUK21+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 MAX6037BAUK21+T part is unused and in its original packaging.
Return procedure for MAX6037BAUK21+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6037BAUK21+T 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…
