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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:
- IC VREF SERIES 1% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,504
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Product details
Overview
The 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, sustains 4mA source / 1mA sink load current, and features 200mV max dropout-making it ideal for precision battery-powered instrumentation and data converter biasing.
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, guaranteed 3.000V output tolerance over -40°C to +85°C, stability with up to 10µF capacitive loads, no external compensation requirement, and SOT23-5 footprint compatibility for space-constrained designs.
Technical Context
This series-mode reference uses BiCMOS bandgap architecture with internal compensation capacitor, eliminating need for external stabilization components. Its design targets high-accuracy analog signal chains where long-term drift (<150ppm over 1000 hours), thermal hysteresis (140ppm), and low noise (50µVP-P, 0.1Hz–10Hz) are critical.
It delivers regulated 3.000V output across full industrial temperature range (-40°C to +85°C) while maintaining line regulation of ≤250µV/V and load regulation of ≤6.5µV/µA under sourcing conditions-enabling direct integration into ADC/DAC reference inputs and precision power supply feedback paths without additional filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.000V ±1% at +25°C; ensures 3.000V reference compliance for 12-bit systems over full temp range |
| Initial Accuracy | ±1% (MAX6129B grade); defines worst-case static error before calibration |
| 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 sources |
| Dropout Voltage | 200mV max at 4mA load; allows operation from 3.2V supply while maintaining 3.000V output |
| Load Current | Sources 4mA / sinks 1mA; supports direct driving of SAR ADC reference inputs and op-amp bias networks |
| Noise (0.1–10Hz) | 50µVP-P; limits quantization uncertainty in 16-bit ADC applications using 3V reference |
Pinout & Package
Package: 5-pin SOT23-5 (JEDEC MO-178AA), 2.9mm × 1.6mm × 1.1mm body, gull-wing leads, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Positive Supply Input | Accepts 3.2V–12.6V input; no bypass capacitor required but 0.1µF ceramic improves transient response |
| 2 (GND) | Analog Ground Reference | Must be connected to clean system ground plane; substrate tied to GND per chip topology |
| 3, 4 (N.C.) | No-Connect Terminals | Internally connected; leave floating or tie to GND-no functional impact on reference performance |
| 5 (OUT) | Precision Reference Output | Delivers stable 3.000V; stable with 0–10µF capacitive loads when sourcing, 0–0.4µF when sinking |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 6.75µA max supply current | Reduces standby power in always-on sensor nodes and extends shelf life of sealed battery systems |
| Internal compensation capacitor | Eliminates need for external compensation, saving PCB area and BOM cost in compact layouts |
| Stable with 10µF output capacitance | Enables direct connection to noisy digital supply rails without oscillation or settling issues |
| 200mV max dropout at 4mA | Permits use with single-cell Li-ion (3.0–3.6V) or dual-cell alkaline (3.0–3.2V) supplies |
| ±1% initial accuracy, 100ppm/°C TC | Meets uncalibrated accuracy requirements for portable 12-bit data acquisition systems |
Applications
| Handheld Multimeter Reference | Precision RTD Signal Conditioning |
|---|---|
Use Scenario: Portable 4½-digit DMM requiring stable 3.000V reference for autoranging ADC front-end. IC Role / Device Role / Timing Role: Primary voltage reference for successive-approximation ADC conversion core. Use Value: 100ppm/°C TC and <150ppm long-term drift ensure measurement repeatability across field operating temperatures without recalibration. | Use Scenario: Battery-powered RTD bridge amplifier with ratiometric ADC readout in industrial handheld sensors. IC Role / Device Role / Timing Role: Excitation reference for constant-current RTD drive and ADC reference for ratio-metric conversion. Use Value: Matched TC between reference and RTD excitation path minimizes common-mode error; 6.75µA supply current enables >5-year battery life. |
| Low-Power Data Logger ADC Bias | Medical Wearable Sensor Front-End |
Use Scenario: Intermittent-sampling environmental logger using 12-bit SAR ADC powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Precision reference for ADC during active sampling bursts; sleeps with ultra-low IQ. Use Value: 200mV dropout allows operation down to 3.2V supply-extending usable battery voltage range by 0.3V versus higher-dropout alternatives. | Use Scenario: ECG/PPG wearable with analog front-end requiring low-noise, stable 3.000V bias for op-amps and ADC. IC Role / Device Role / Timing Role: Low-noise reference source for signal chain gain stages and 16-bit delta-sigma ADC. Use Value: 50µVP-P (0.1–10Hz) noise floor prevents degradation of sub-µV biomedical signal resolution. |
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 3.000V output, ±1% accuracy, but 30ppm/°C TC (vs. 100ppm/°C) and 12µA supply current | Better TC suits higher-resolution systems; higher IQ reduces battery life in ultra-low-power use cases | Select MAX6126BEUR30+T when TC dominates error budget; choose MAX6129BEUK30+T when supply current is primary constraint |
| REF3030AIDBZR | 3.000V, ±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 sink capability | Use REF3030AIDBZR where absolute accuracy outweighs power; retain MAX6129BEUK30+T for microamp-level systems needing sink current |
Compared with MAX6126BEUR30+T and REF3030AIDBZR, the MAX6129BEUK30+T uniquely balances ultra-low 6.75µA supply current, 1mA sink capability, and SOT23-5 layout compatibility-making it optimal for space- and power-constrained precision analog designs where moderate TC is acceptable.
Availability
MAX6129BEUK30+T is available at Aetrix Electronics and suitable for battery-powered instrumentation, handheld test equipment, and precision data acquisition systems requiring stable component supply with guaranteed long-term availability.
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 precision analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX6129 family delivers ultra-low-power, high-accuracy series voltage references optimized for battery-operated and space-constrained precision measurement systems.
FAQ
What is the output voltage tolerance of the MAX6129BEUK30+T over its full operating temperature range?
The MAX6129BEUK30+T provides a nominal 3.000V output with ±1% initial accuracy at +25°C and a maximum temperature coefficient of 100ppm/°C. Over the full -40°C to +85°C range, total output variation remains within ±1.25% of 3.000V, including initial error and thermal drift-verified per datasheet electrical characteristics for the B-grade variant.
Does the MAX6129BEUK30+T require an external output capacitor for stability?
No, the MAX6129BEUK30+T does not require an external output capacitor for stability. Its internal compensation ensures unconditional stability with capacitive loads from 0 to 10µF when sourcing current and 0 to 0.4µF when sinking current. An output capacitor may be added to improve transient response in step-load applications, but it is optional per the datasheet Applications Information section.
What is the minimum input voltage required for the MAX6129BEUK30+T to maintain regulation at full 4mA load?
The MAX6129BEUK30+T requires a minimum input voltage of 3.200V to maintain regulation at 4mA load current. This is derived from its 3.000V output plus the maximum 200mV dropout voltage specified under those conditions. The device remains functional down to 3.2V input across the full -40°C to +85°C temperature range, as confirmed in the ELECTRICAL CHARACTERISTICS-MAX6129_30 table.
How does the supply current of the MAX6129BEUK30+T vary with input voltage?
The MAX6129BEUK30+T exhibits highly stable supply current: 6.75µA maximum across its full 3.2V to 12.6V input range, with variation limited to 1.5µA/V max. This means supply current changes by less than 14.3µA over the entire supply range-ensuring predictable power consumption in battery systems regardless of battery voltage decay.
Can the MAX6129BEUK30+T sink current, and if so, what is the maximum sink capability?
Yes, the MAX6129BEUK30+T can sink up to 1mA of load current, as explicitly stated in the General Description and confirmed in the ELECTRICAL CHARACTERISTICS-MAX6129_30 table under Load Regulation. This sink capability enables bidirectional reference buffering and active pull-down in precision analog circuits where the reference node must be actively discharged.
MAX6129BEUK30+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):
- 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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