My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6129AEUK25+T
- Part No.:
- MAX6129AEUK25+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6129AEUK25+T.pdf
- Description:
- IC VREF SERIES 0.4% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,215
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX6129AEUK25+T from Maxim Integrated is a micropower, low-dropout series-mode bandgap voltage reference delivering a precise 2.500V output with ±0.4% initial accuracy and 40ppm/°C max temperature coefficient in a 5-pin SOT23 package. It operates from 2.7V to 12.6V supply, draws only 5.75µA (max) quiescent current, sustains 4mA source / 1mA sink load, and features 200mV dropout-enabling high-accuracy analog sensing and data conversion in space-constrained, battery-powered systems.
For engineers reviewing the MAX6129AEUK25+T datasheet, MAX6129AEUK25+T pinout, MAX6129AEUK25+T application, or MAX6129AEUK25+T equivalent, key selection criteria include ultra-low supply current, guaranteed 2.5V output tolerance over -40°C to +85°C, stability with up to 10µF capacitive loads, and absence of required external compensation components.
Technical Context
The MAX6129AEUK25+T is a series-mode reference using internal bandgap core and active pass element, enabling both sourcing and sinking capability without external components. Its architecture integrates a compensation capacitor, eliminating need for external stabilization while maintaining stability across 0–10µF output capacitance under sourcing conditions and 0–0.4µF under sinking.
It achieves precision via trimmed resistor networks and laser-trimmed bandgap elements, supporting operation across full industrial temperature range (-40°C to +85°C) with guaranteed line regulation (≤230µV/V), load regulation (≤0.6µV/µA sourcing), and thermal hysteresis (≤140ppm). Turn-on settling time is 700ms to 0.1% final value at 2.5V output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±0.4% at +25°C - ensures ≤10mV absolute error for 12-bit ADCs over full temp range |
| Supply Current | 5.75µA (max) - enables >10-year battery life in coin-cell-powered IoT sensors |
| Temperature Coefficient | 40ppm/°C (max) - limits drift to ≤±0.85mV over -40°C to +85°C span |
| Dropout Voltage | 200mV (max) at 4mA load - allows operation from 2.7V supply while maintaining regulation |
| Load Current Range | Sources up to 4mA / sinks up to 1mA - supports direct driving of SAR ADC references and op-amp biasing |
| Capacitive Load Stability | Stable with 0–10µF (source) and 0–0.4µF (sink) - eliminates need for output capacitor in most portable designs |
| Noise (10Hz–1kHz) | 137µVRMS - suitable for 16-bit precision measurement front-ends |
Pinout & Package
MAX6129AEUK25+T uses a 5-pin SOT23-5 surface-mount package (JEDEC MO-178AA), occupying 70% less board area than SO-8 alternatives. Pin 1 is IN, Pin 2 is GND, Pins 3 and 4 are internally connected no-connect terminals (may be left floating or tied to GND), and Pin 5 is OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Positive supply input | Accepts 2.7V–12.6V; no input bypass required but 0.1µF ceramic improves transient response |
| 2 (GND) | Analog ground reference | Must be low-impedance connection; substrate tied to GND per chip topography |
| 3, 4 (N.C.) | Internally connected, unused | May be left unconnected or grounded; no electrical function or signal routing |
| 5 (OUT) | Precision 2.500V reference output | Delivers regulated voltage with sourcing/sinking capability; stable without external capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 5.75µA max supply current | Reduces standby power in always-on sensor nodes and extends shelf life of sealed battery systems |
| Integrated compensation capacitor | Eliminates external capacitor requirement and associated layout sensitivity or EMI coupling paths |
| 200mV max dropout at 4mA | Enables use with single Li-ion or two alkaline cells while maintaining full output accuracy |
| ±0.4% initial accuracy (Grade A) | Meets tight offset requirements for calibrated instrumentation and medical-grade analog front-ends |
| Stable with 10µF output capacitance | Supports direct interface to high-capacitance ADC reference inputs without oscillation risk |
Applications
| Battery-Powered Data Loggers | Portable Medical Sensors |
|---|---|
Use Scenario: Continuous 16-bit temperature/humidity logging in handheld environmental monitors powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Provides stable 2.500V reference for successive-approximation ADC and low-power microcontroller VREF input. Use Value: Ultra-low 5.75µA supply current extends battery life beyond 5 years; 40ppm/°C TC ensures <±1LSB error across operating temperature. | Use Scenario: Disposable pulse oximeter with optical front-end and analog signal conditioning. IC Role / Device Role / Timing Role: Supplies precision reference for transimpedance amplifier biasing and ADC conversion of photodiode signals. Use Value: 200mV dropout allows operation from 2.7V supply; no external capacitor saves PCB area in compact wearable form factor. |
| Industrial Field Transmitters | Calibrated Test Equipment |
Use Scenario: 4–20mA loop-powered pressure transmitter with onboard digital calibration memory. IC Role / Device Role / Timing Role: Serves as master reference for DAC-based current loop control and sensor linearization circuitry. Use Value: ±0.4% initial accuracy and 140ppm thermal hysteresis enable factory calibration retention over 10+ year field life. | Use Scenario: Benchtop multimeter with auto-ranging 22-bit delta-sigma ADC and internal self-calibration routine. IC Role / Device Role / Timing Role: Primary reference for ADC and secondary reference for DAC-based offset/gain correction. Use Value: 137µVRMS noise and 34dB ripple rejection ensure clean digitization even with noisy SMPS supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3425ARJZ-R7 | 2.5V output, ±0.1% initial accuracy, 3ppm/°C TC, 3.5µA supply current, SOT23-5 | Higher precision and lower drift, but requires 1µF output capacitor for stability | Select when sub-0.1% accuracy and ultra-low drift outweigh capacitor area and BOM cost |
| REF3025AIDBZR | 2.5V output, ±0.2% initial accuracy, 50ppm/°C TC, 45µA supply current, SOT23-3 | Higher supply current, 3-pin package, no sink capability, requires 1µF output capacitor | Select when lowest possible footprint (SOT23-3) is critical and 45µA quiescent current is acceptable |
Compared with ADR3425ARJZ-R7 and REF3025AIDBZR, the MAX6129AEUK25+T offers unique combination of ultra-low 5.75µA supply current, 4mA sourcing + 1mA sinking, and capacitor-free stability-making it optimal for long-life, space-constrained, bidirectionally loaded reference applications where moderate (±0.4%) accuracy suffices.
Availability
MAX6129AEUK25+T is available at Aetrix Electronics and suitable for battery-powered data loggers, portable medical sensors, and industrial field transmitters requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MAX6129AEUK25+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, medical, and communications applications.
The MAX6129 family delivers ultra-low-power, high-accuracy series voltage references optimized for battery-operated instrumentation, portable test equipment, and energy-harvesting systems where minimal supply current and capacitor-free operation are essential.
FAQ
What is the maximum load current the MAX6129AEUK25+T can source and sink?
The MAX6129AEUK25+T can source up to 4mA and sink up to 1mA of load current while maintaining output regulation and specified accuracy. This bidirectional capability enables direct interfacing with ADC reference inputs, op-amp bias networks, and DAC feedback paths without external buffering. The device remains stable across this full load range with capacitive loads up to 10µF during sourcing.
Does the MAX6129AEUK25+T require external capacitors for stability?
No, the MAX6129AEUK25+T does not require external capacitors for stability due to its integrated compensation capacitor. It is stable driving capacitive loads from 0 to 10µF when sourcing current and from 0 to 0.4µF when sinking current. An optional 0.1µF ceramic input capacitor improves transient response but is not mandatory for basic operation.
What is the supply voltage range for the MAX6129AEUK25+T?
The MAX6129AEUK25+T operates from a supply voltage range of 2.7V to 12.6V. Its 200mV maximum dropout voltage at 4mA load enables reliable regulation even when powered from marginal sources such as partially discharged lithium coin cells or two-series alkaline batteries, making it ideal for ultra-low-power portable applications.
How accurate is the MAX6129AEUK25+T over temperature?
The MAX6129AEUK25+T (Grade A) guarantees ±0.4% initial accuracy at +25°C and a maximum temperature coefficient of 40ppm/°C over -40°C to +85°C. This results in total output variation of ≤±0.85mV across the full temperature range, sufficient for 12-bit system accuracy without calibration. Long-term stability is 150ppm over 1000 hours.
What package type and pin configuration does the MAX6129AEUK25+T use?
The MAX6129AEUK25+T uses a 5-pin SOT23-5 package (JEDEC MO-178AA) with pin 1 = IN, pin 2 = GND, pins 3 and 4 = N.C. (internally connected, may be left open or grounded), and pin 5 = OUT. This miniature footprint occupies 70% less board area than comparable SO-8 voltage references and supports automated assembly.
MAX6129AEUK25+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):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 4 mA
- Tolerance:
- ±0.4%
- Temperature Coefficient:
- 40ppm/°C
- Noise - 0.1Hz to 10Hz:
- 39µVp-p
- Noise - 10Hz to 10kHz:
- 137µVrms
- Voltage - Input:
- 2.7V ~ 12.6V
- Current - Supply:
- 5.75µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6129AEUK25+T FAQ
1.How can I place an order for MAX6129AEUK25+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6129AEUK25+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 MAX6129AEUK25+T reliable?
The price and inventory of MAX6129AEUK25+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6129AEUK25+T is usually 5 days.
3.What payment methods are accepted for MAX6129AEUK25+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6129AEUK25+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6129AEUK25+T?
MAX6129AEUK25+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6129AEUK25+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 MAX6129AEUK25+T?
For technical support, including MAX6129AEUK25+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6129AEUK25+T requirements.
6.How does Aetrix verify that MAX6129AEUK25+T is sourced from the original manufacturer or authorized distributors?
All MAX6129AEUK25+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 MAX6129AEUK25+T meets industry standards.
7.What is the process for return or replacement of MAX6129AEUK25+T?
All MAX6129AEUK25+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6129AEUK25+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 MAX6129AEUK25+T part is unused and in its original packaging.
Return procedure for MAX6129AEUK25+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6129AEUK25+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…
