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Analog Devices Inc./Maxim Integrated MAX6129BEUK30-T
- Part No.:
- MAX6129BEUK30-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6129BEUK30-T.pdf
- Description:
- VOLTAGE REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6129BEUK30-T from Maxim Integrated is a micropower, low-dropout series-mode bandgap voltage reference delivering a precise 3.000V output with ±1% initial accuracy and 100ppm/°C max temperature coefficient in a 5-pin SOT23 package. It operates from 3.2V to 12.6V supply, draws only 6.75µA (max) quiescent current, and sustains 4mA source / 1mA sink load current - ideal for precision battery-powered instrumentation and data converters.
For engineers reviewing the MAX6129BEUK30-T datasheet, MAX6129BEUK30-T pinout, MAX6129BEUK30-T application, or MAX6129BEUK30-T equivalent, key selection criteria include ultra-low supply current, dropout voltage ≤200mV at 4mA, stability with up to 10µF capacitive loads, no external compensation requirement, and guaranteed performance across –40°C to +85°C.
Technical Context
The MAX6129BEUK30-T employs a series-mode bandgap architecture with internal compensation, eliminating need for external capacitors while ensuring stability across 0–10µF output capacitance (sourcing) and 0–0.4µF (sinking). Its BiCMOS process enables ultra-low 6.75µA supply current with only 1.5µA/V variation over supply range.
This device functions as a precision fixed-output voltage reference with active regulation: input voltage must exceed VOUT by ≥140mV (typical) to maintain regulation, and output error is dominated by initial accuracy (±1%), thermal drift (100ppm/°C), and load/line regulation (0.6µV/µA and 250µV/V max).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.000V ±1% at +25°C - defines absolute reference level for ADC/DAC full-scale calibration |
| Initial Accuracy | ±1% (Grade B) - sets worst-case static error before temperature or load effects |
| Temp Coefficient | 100ppm/°C max - contributes ≤0.84% output drift over –40°C to +85°C span |
| Supply Current | 6.75µA max - enables >10-year battery life in 10µA-systems with coin-cell power |
| Dropout Voltage | 200mV max at 4mA load - allows operation from 3.2V supply while regulating 3.0V output |
| Load Regulation | 0.6µV/µA max sourcing - ensures ≤2.4mV shift from 0 to 4mA load change |
| Line Regulation | 250µV/V max - limits output shift to ≤2.25mV over full 3.2V–12.6V input range |
Pinout & Package
MAX6129BEUK30-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 (input supply), 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 (regulated 3.000V reference output).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Positive supply input | Accepts 3.2V–12.6V; must exceed OUT by ≥140mV for regulation |
| 2 (GND) | Ground reference | Primary return path; substrate tied to this pin per chip topography |
| 3, 4 (N.C.) | No-connect terminals | Internally bonded; electrically isolated - leave unconnected or tie to GND for mechanical stability |
| 5 (OUT) | Precision reference output | Delivers stable 3.000V ±1%; drives capacitive loads up to 10µF when sourcing |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Internal compensation ensures stability with 0–10µF output capacitance - eliminates BOM cost and layout area for decoupling |
| Ultra-low 6.75µA supply current | Reduces system standby power by >50% vs. typical references - critical for multi-year battery operation |
| Low 200mV dropout at 4mA | Enables use with single Li-ion or 3x alkaline cells without LDO pre-regulation |
| Stable with wide capacitive loads | Supports direct connection to ADC input caps and digital supply rails without oscillation risk |
| Grade B accuracy & drift | ±1% initial error and 100ppm/°C TC meet cost-sensitive industrial sensor and portable meter requirements |
Applications
| Handheld Multimeters | Precision RTD Signal Chains |
|---|---|
|
Use Scenario: Portable 4½-digit DMM requiring stable reference for autoranging ADC during battery-powered field use. IC Role / Device Role / Timing Role: Primary voltage reference for SAR ADC front-end, defining full-scale range and enabling ratiometric measurements. Use Value: 6.75µA supply current extends AA battery life beyond 2 years; 100ppm/°C TC ensures <0.1% reading drift across operating temperature. |
Use Scenario: Industrial temperature transmitter with 3-wire RTD interface and 24-bit ΣΔ ADC. IC Role / Device Role / Timing Role: Excitation reference for constant-current RTD bias and reference for ADC conversion. Use Value: 3.000V output matches common 3V ADC full-scale; 200mV dropout allows direct use from 3.3V rail with margin. |
| Wireless Sensor Nodes | Portable Medical Glucometers |
|
Use Scenario: LoRaWAN node with ultra-low-power MCU, analog front-end, and intermittent transmission. IC Role / Device Role / Timing Role: Reference for low-noise PGA and 16-bit ADC sampling battery voltage and sensor signals. Use Value: No external cap reduces component count; 0.6µV/µA load regulation minimizes error during RF transmit current surges. |
Use Scenario: FDA-cleared blood glucose meter using electrochemical test strips and disposable cartridges. IC Role / Device Role / Timing Role: Precision reference for current-to-voltage conversion and ADC digitization of strip response. Use Value: ±1% initial accuracy meets IEC 60601-2-65 clinical tolerance; 150ppm long-term stability supports 2-year shelf life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6126BEUR30-T | Same 3.0V output, ±1% accuracy, but 35ppm/°C TC (vs. 100ppm/°C) and 8.5µA supply current | Better drift performance suits higher-precision instruments; higher supply current reduces battery life | Select MAX6126BEUR30-T when TC dominates error budget; choose MAX6129BEUK30-T when ultra-low IQ is primary constraint |
| REF3030AIDBZR | 3.0V output, ±0.2% initial accuracy, 50ppm/°C TC, 50µA supply current, SOT23-3 package | Higher accuracy and lower TC, but 7.4× higher supply current and no sinking capability | Choose REF3030AIDBZR for lab-grade accuracy where power is secondary; MAX6129BEUK30-T fits space/power-constrained portable designs |
Compared with MAX6126BEUR30-T and REF3030AIDBZR, the MAX6129BEUK30-T uniquely balances ultra-low 6.75µA supply current, 1mA sink capability, and SOT23-5 pinout - making it optimal for battery-operated systems needing regulated reference with minimal overhead.
Availability
MAX6129BEUK30-T is available at Aetrix Electronics and suitable for handheld instruments, precision power supplies, and A/D converter reference applications requiring stable component supply across extended product lifecycles.
Supply support for MAX6129BEUK30-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 high-performance analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX6129 family delivers ultra-low-power, precision voltage references optimized for battery-operated instrumentation and data acquisition systems where board space and energy efficiency are critical.
FAQ
What is the maximum load current the MAX6129BEUK30-T can source and sink?
The MAX6129BEUK30-T sources up to 4mA and sinks up to 1mA of load current while maintaining regulation and specified accuracy. This dual-direction capability supports both active pull-up and pull-down configurations in precision analog circuits, unlike many references limited to sourcing only. The 4mA sourcing limit is validated at 200mV dropout; performance degrades near dropout boundary.
Does the MAX6129BEUK30-T require external capacitors for stability?
No, the MAX6129BEUK30-T includes internal compensation and is stable without external capacitors. It remains stable driving capacitive loads from 0 to 10µF when sourcing current and 0 to 0.4µF when sinking current. Adding an output capacitor improves transient response in step-load applications but is not required for basic stability - a key advantage for space-constrained PCB layouts.
What is the operating temperature range for the MAX6129BEUK30-T?
The MAX6129BEUK30-T is specified for continuous operation from –40°C to +85°C. All electrical characteristics - including initial accuracy (±1%), temperature coefficient (100ppm/°C max), and supply current (6.75µA max) - are guaranteed across this full industrial temperature range, making it suitable for outdoor, automotive cabin, and factory-floor environments.
How does the supply voltage affect the MAX6129BEUK30-T's quiescent current?
The MAX6129BEUK30-T exhibits exceptionally stable supply current: variation is limited to 1.5µA/V max over its 3.2V–12.6V input range. At nominal conditions, supply current is 6.75µA max - meaning it draws only ~6.75µA whether powered from 3.3V or 12V, maximizing efficiency and simplifying power budgeting in wide-input systems.
What is the significance of the 'B' grade in MAX6129BEUK30-T?
The 'B' in MAX6129BEUK30-T denotes Grade B performance: ±1% initial output voltage accuracy and 100ppm/°C maximum temperature coefficient. This grade targets cost-sensitive, high-volume applications like portable test equipment and consumer medical devices where ultra-high precision is unnecessary but reliability and low power remain essential - distinct from Grade A (±0.4%, 40ppm/°C).
MAX6129BEUK30-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):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 4 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- 50µVp-p
- Noise - 10Hz to 10kHz:
- 161µVrms
- Voltage - Input:
- 3.2V ~ 12.6V
- Current - Supply:
- 6.75µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6129BEUK30-T FAQ
1.How can I place an order for MAX6129BEUK30-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6129BEUK30-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 MAX6129BEUK30-T reliable?
The price and inventory of MAX6129BEUK30-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6129BEUK30-T is usually 5 days.
3.What payment methods are accepted for MAX6129BEUK30-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6129BEUK30-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6129BEUK30-T?
MAX6129BEUK30-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6129BEUK30-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 MAX6129BEUK30-T?
For technical support, including MAX6129BEUK30-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6129BEUK30-T requirements.
6.How does Aetrix verify that MAX6129BEUK30-T is sourced from the original manufacturer or authorized distributors?
All MAX6129BEUK30-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 MAX6129BEUK30-T meets industry standards.
7.What is the process for return or replacement of MAX6129BEUK30-T?
All MAX6129BEUK30-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6129BEUK30-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 MAX6129BEUK30-T part is unused and in its original packaging.
Return procedure for MAX6129BEUK30-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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