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Analog Devices Inc./Maxim Integrated MAX6129AEUK50-T
- Part No.:
- MAX6129AEUK50-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6129AEUK50-T.pdf
- Description:
- VOLTAGE REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:2,320
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Product details
Overview
MAX6129AEUK50-T from Maxim Integrated is a micropower, low-dropout bandgap voltage reference delivering a precise 5.000V output with ±0.4% initial accuracy and 40ppm/°C max temperature coefficient in a 5-pin SOT23 package. It sources up to 4mA and sinks up to 1mA, operates from 5.2V to 12.6V supply, draws only 10.5µA max supply current, and maintains stability with capacitive loads up to 10µF - ideal for high-accuracy, battery-constrained precision ADC/DAC systems.
For engineers reviewing the MAX6129AEUK50-T datasheet, MAX6129AEUK50-T pinout, MAX6129AEUK50-T application, or MAX6129AEUK50-T equivalent, key selection criteria include ultra-low quiescent current (10.5µA), 200mV dropout at 4mA load, no external compensation requirement, and guaranteed performance across –40°C to +85°C.
Technical Context
The MAX6129AEUK50-T is a series-mode bandgap voltage reference using internal BiCMOS circuitry to achieve ultra-stable 5.000V output. Its architecture integrates an on-die compensation capacitor, eliminating need for external stabilization components while supporting 0–10µF output capacitance during sourcing and 0–0.4µF during sinking.
It features rail-to-rail input operation down to 5.2V (200mV above VOUT), delivers 0.1% settling in 1.4ms, and maintains <150ppm long-term stability over 1000 hours - enabling use in metrology-grade portable instrumentation and low-power sensor signal chains where drift and power budget are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±0.4% at +25°C - ensures ≤20mV absolute error for 12-bit+ data converters over full temp range |
| Supply Current | 10.5µA (max) - enables >10-year battery life in coin-cell-powered devices drawing <1µA average system current |
| Temperature Coefficient | 40ppm/°C (max) - limits output drift to ±1.6mV over –40°C to +85°C ambient swing |
| Dropout Voltage | 200mV (max) at 4mA load - allows operation from single 5.2V supply with margin for aging and ripple |
| Load Regulation | 0.8µV/µA (max) sourcing - holds output within ±3.2mV across full 0–4mA load range |
| Noise (10Hz–1kHz) | 245µVRMS - contributes <0.5 LSB error in 16-bit 5V full-scale ADCs |
| Line Regulation | 375µV/V (max) - maintains output stability despite ±10% input rail variation |
Pinout & Package
The MAX6129AEUK50-T is housed in a standard 5-pin SOT23-5 surface-mount package (JEDEC MO-178AA), occupying 70% less PCB 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 5.2V–12.6V; no bypass capacitor required but 0.1µF ceramic improves transient response |
| 2 (GND) | Analog ground reference | Must be low-impedance connection; substrate tied to GND per chip topology |
| 3, 4 (N.C.) | Internally connected, unused | No electrical function; may be left unconnected or grounded for mechanical stability |
| 5 (OUT) | Precision 5.000V reference output | Stable with 0–10µF capacitive loads when sourcing; supports 0–0.4µF when sinking |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 10.5µA supply current | Enables multi-year operation from CR2032 batteries in handheld test equipment without compromising accuracy |
| Integrated compensation capacitor | Eliminates external capacitor requirement and reduces BOM count while guaranteeing stability up to 10µF load |
| ±0.4% initial accuracy (Grade A) | Meets calibration-grade tolerance for portable multimeters and medical sensor front-ends without post-manufacture trimming |
| 200mV dropout at 4mA | Permits direct regulation from common 5.2V LDO outputs or aged Li-ion cells down to 3.2V nominal |
| –40°C to +85°C operating range | Validated for industrial outdoor deployment and automotive cabin electronics without derating |
Applications
| Battery-Powered Precision DMMs | Portable Medical Sensors |
|---|---|
Use Scenario: Handheld digital multimeter requiring stable 5V reference for 16-bit SAR ADC across temperature and battery discharge. IC Role / Device Role / Timing Role: Primary voltage reference for analog front-end signal conditioning and ADC conversion. Use Value: 40ppm/°C TC and 0.4% initial accuracy ensure measurement repeatability within ±0.02% of reading over full operating range. | Use Scenario: Wearable ECG monitor powered by coin cell, needing low-noise, low-drift reference for biopotential amplification. IC Role / Device Role / Timing Role: Reference source for instrumentation amplifier gain-setting and ADC reference voltage. Use Value: 245µVRMS noise and 10.5µA supply current extend battery life beyond 12 months while preserving µV-level signal integrity. |
| Industrial Data Acquisition Modules | Low-Power IoT Sensor Nodes |
Use Scenario: DIN-rail mounted DAQ unit acquiring 12–16-bit analog inputs in factory environments with wide ambient swings. IC Role / Device Role / Timing Role: Precision reference for multiplexed ADC channels and isolated analog outputs. Use Value: 150ppm long-term stability and thermal hysteresis <140ppm minimize recalibration frequency in unattended deployments. | Use Scenario: Wireless environmental sensor node (temperature/humidity) transmitting via BLE, constrained by CR2032 capacity. IC Role / Device Role / Timing Role: Reference for microcontroller's internal ADC and external analog sensor biasing. Use Value: 5.2V minimum input enables operation directly from boost converter output, avoiding extra LDO stage and saving 15% board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5050AIDR | Higher 3.5ppm/°C TC, 50ppm/1000h drift, 1.2mA supply current, SO-8 package | Better TC and long-term stability but 114× higher quiescent current; requires larger PCB footprint | Select REF5050AIDR only when sub-10ppm/°C TC is mandatory and power budget permits ≥1mA continuous draw |
| ADR3450ARJZ-R7 | 45ppm/°C TC, 10ppm/1000h drift, 120µA supply current, SOT23-5 package | Lower cost and adequate TC for 12-bit systems, but 11× higher supply current limits battery life | Choose ADR3450ARJZ-R7 for cost-sensitive industrial controls where 12-bit accuracy suffices and battery life >6 months is acceptable |
Compared with REF5050AIDR and ADR3450ARJZ-R7, the MAX6129AEUK50-T uniquely balances ultra-low 10.5µA supply current, 40ppm/°C TC, and SOT23-5 size - making it the only option meeting both 16-bit precision and multi-year coin-cell operation requirements simultaneously.
Availability
MAX6129AEUK50-T is available at Aetrix Electronics and suitable for battery-powered precision DMMs, portable medical sensors, industrial data acquisition modules, and low-power IoT sensor nodes requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6129AEUK50-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 targets ultra-low-power, high-accuracy voltage references for portable and battery-operated systems where space, power, and long-term stability are critical constraints.
FAQ
What is the maximum load current the MAX6129AEUK50-T can source and sink?
The MAX6129AEUK50-T can source up to 4mA and sink up to 1mA of load current while maintaining specified accuracy and stability. This capability supports direct driving of ADC reference inputs, op-amp bias networks, and small-signal transducers without external buffering - a key advantage for compact, low-component-count designs using the MAX6129AEUK50-T.
Does the MAX6129AEUK50-T require external capacitors for stability?
No, the MAX6129AEUK50-T includes an internal compensation capacitor and is stable with output capacitances from 0 to 10µF when sourcing current and 0 to 0.4µF when sinking current. An input bypass capacitor is optional but recommended (0.1µF ceramic) for improved line-transient response - eliminating external components simplifies layout and reduces BOM cost for the MAX6129AEUK50-T.
What is the dropout voltage specification for the MAX6129AEUK50-T?
The MAX6129AEUK50-T has a maximum dropout voltage of 200mV at 4mA load current, defined as the minimum VIN − VOUT required to maintain output regulation within 0.1% of nominal 5.000V. At zero load, dropout drops to 175mV. This allows reliable operation from 5.2V supplies, including aged lithium batteries and low-headroom LDO outputs feeding the MAX6129AEUK50-T.
How does the MAX6129AEUK50-T perform in terms of output voltage temperature coefficient?
The MAX6129AEUK50-T (Grade A) guarantees a maximum temperature coefficient of 40ppm/°C over –40°C to +85°C, measured using the box method. This translates to ≤±1.6mV total drift across the full temperature range - sufficient for 16-bit accuracy in 5V full-scale systems. The MAX6129AEUK50-T achieves this with bandgap-based series architecture and on-die trimming, not external compensation.
Is the MAX6129AEUK50-T pin-compatible with other members of the MAX6129 family?
Yes, all MAX6129 variants - including MAX6129AEUK21-T, MAX6129AEUK25-T, MAX6129AEUK30-T, MAX6129AEUK33-T, MAX6129AEUK41-T, and MAX6129AEUK50-T - share identical 5-pin SOT23-5 pinout, package dimensions, and terminal functions. Designers can swap output voltages without PCB revision, provided supply voltage and load conditions remain within each variant's validated operating range - a key flexibility feature of the MAX6129AEUK50-T family.
MAX6129AEUK50-T 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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 4 mA
- Tolerance:
- ±0.4%
- Temperature Coefficient:
- 40ppm/°C
- Noise - 0.1Hz to 10Hz:
- 90µVp-p
- Noise - 10Hz to 10kHz:
- 245µVrms
- Voltage - Input:
- 5.2V ~ 12.6V
- Current - Supply:
- 10.5µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6129AEUK50-T FAQ
1.How can I place an order for MAX6129AEUK50-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6129AEUK50-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 MAX6129AEUK50-T reliable?
The price and inventory of MAX6129AEUK50-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6129AEUK50-T is usually 5 days.
3.What payment methods are accepted for MAX6129AEUK50-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6129AEUK50-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6129AEUK50-T?
MAX6129AEUK50-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6129AEUK50-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 MAX6129AEUK50-T?
For technical support, including MAX6129AEUK50-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6129AEUK50-T requirements.
6.How does Aetrix verify that MAX6129AEUK50-T is sourced from the original manufacturer or authorized distributors?
All MAX6129AEUK50-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 MAX6129AEUK50-T meets industry standards.
7.What is the process for return or replacement of MAX6129AEUK50-T?
All MAX6129AEUK50-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6129AEUK50-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 MAX6129AEUK50-T part is unused and in its original packaging.
Return procedure for MAX6129AEUK50-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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