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Analog Devices Inc./Maxim Integrated MAX6129BEUK50-T
- Part No.:
- MAX6129BEUK50-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6129BEUK50-T.pdf
- Description:
- VOLTAGE REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:2,475
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Product details
Overview
MAX6129BEUK50-T from Maxim Integrated is a micropower, low-dropout series-mode bandgap voltage reference delivering a precise 5.000V output with ±1% initial accuracy and 100ppm/°C max temperature coefficient in a 5-pin SOT23 package. It operates from 5.2V to 12.6V supply, draws only 10.5µA (typ) supply current, sustains 4mA source / 1mA sink load current, and exhibits 200mV max dropout - making it ideal for precision battery-powered instrumentation and data converters.
For engineers reviewing the MAX6129BEUK50-T datasheet, MAX6129BEUK50-T pinout, MAX6129BEUK50-T application, or MAX6129BEUK50-T equivalent, key selection criteria include its guaranteed 100ppm/°C tempco over –40°C to +85°C, stability with up to 10µF capacitive loads, no external compensation requirement, and ultra-low quiescent current enabling multi-year operation on coin cells.
Technical Context
The MAX6129BEUK50-T is a series-mode bandgap reference using internal BiCMOS circuitry to achieve high PSRR (38dB at 120Hz), low noise (245µVRMS, 10Hz–1kHz), and thermal hysteresis of 140ppm. Its architecture integrates a compensation capacitor, eliminating external stability components while supporting wide load capacitance ranges (0–10µF sourcing, 0–0.4µF sinking).
It features graded performance: Grade B offers ±1% initial accuracy and 100ppm/°C tempco - optimized for cost-sensitive industrial and portable applications where moderate precision suffices without requiring A-grade metrology-level stability. Dropout voltage remains ≤200mV across full 4mA sourcing load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±1% at +25°C - ensures compatibility with 5V ADC/DAC full-scale ranges and reduces calibration burden in mid-precision systems. |
| Temperature Coefficient | 100ppm/°C (max) - limits output drift to ±0.85% over –40°C to +85°C, suitable for handheld test equipment and sensor signal chains. |
| Supply Current | 10.5µA (typ), ≤12.0µA (max) - enables >10-year battery life in 20mAh coin-cell applications with intermittent wake-up duty cycles. |
| Dropout Voltage | 200mV (max) at 4mA load - allows operation from 5.2V input, supporting single-cell LiFePO₄ or regulated 5V rails with margin. |
| Load Regulation | 9µV/µA (max) - maintains <0.036% output change over full 4mA sourcing range, critical for stable biasing in precision amplifiers. |
| Capacitive Load Stability | Stable with 0–10µF output capacitance - eliminates need for external compensation and simplifies layout in space-constrained PCBs. |
Pinout & Package
MAX6129BEUK50-T is housed in a standard 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 5.2V–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.) | Internally connected, unused | No electrical function; may be left unconnected or grounded to improve mechanical rigidity or EMI shielding. |
| 5 (OUT) | Precision 5.000V reference output | Delivers regulated voltage with 140ppm long-term stability (1000h); drives capacitive loads up to 10µF directly. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | 10.5µA typical - minimizes self-heating and extends battery runtime in always-on portable devices. |
| No external compensation required | Integrated 100pF capacitor ensures unconditional stability - removes design risk and BOM line item for external cap. |
| Wide capacitive load tolerance | Operates stably with 0–10µF output capacitance - supports ceramic, tantalum, or polymer caps for EMI filtering or hold-up. |
| Low dropout voltage | 200mV max at 4mA - enables use with low-headroom supplies such as LiFePO₄ (3.2V–3.6V) when paired with LDO pre-regulation. |
| Grade-B precision | ±1% initial accuracy + 100ppm/°C tempco - balances cost and performance for industrial sensors and portable meters where A-grade is over-spec. |
Applications
| Battery-Powered Handheld Instruments | Precision Data Acquisition Systems |
|---|---|
|
Use Scenario: Portable multimeter or environmental sensor node operating from CR2032 coin cell with 10-second measurement intervals. IC Role / Device Role / Timing Role: Provides stable 5.000V reference for 12-bit SAR ADC and microcontroller VREF input. Use Value: 10.5µA supply current enables >15-year battery life; 100ppm/°C tempco ensures <0.5% reading error across field operating temperatures. |
Use Scenario: Industrial PLC analog input module digitizing 4–20mA sensor signals with 16-bit resolution. IC Role / Device Role / Timing Role: Supplies excitation and reference voltage for precision instrumentation amplifier and ADC front-end. Use Value: 200mV dropout allows direct connection to 5.2V local LDO; 9µV/µA load regulation prevents gain error during multiplexed channel switching. |
| Low-Power Sensor Signal Conditioning | Portable Medical Monitoring Devices |
|
Use Scenario: Wearable pulse oximeter using transimpedance amplifier and 14-bit ADC for photodiode current measurement. IC Role / Device Role / Timing Role: Reference source for ADC and bias generation for op-amp stages in analog front-end. Use Value: Stability with 1µF output cap suppresses switching noise from digital subsystem; 245µVRMS noise contributes <0.005% RMS error to full-scale measurement. |
Use Scenario: Battery-operated ECG patch recording heart signals for 72-hour continuous monitoring. IC Role / Device Role / Timing Role: Precision voltage reference for low-noise instrumentation amplifier and sigma-delta ADC. Use Value: 140ppm long-term stability ensures calibration validity over device lifetime; no external cap saves space in ultra-thin flex PCB assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6126BEUR50-T | Same 5V output, ±1% accuracy, but 30ppm/°C tempco and 12µA supply current; uses 6-pin SOT23 package with EN pin. | EN pin enables power cycling in ultra-low-duty-cycle systems; lower tempco suits wider temperature ranges. | Select when active enable control or tighter thermal drift is required; verify PCB footprint compatibility (6-pin vs. 5-pin). |
| ADR3450ARJZ-R7 | 5.0V output, ±0.1% initial accuracy, 10ppm/°C tempco, 120µA supply current; 6-pin SOT23 package. | Higher precision and lower noise (9µVRMS), but 11× higher supply current limits battery life. | Choose for metrology-grade accuracy where power budget permits; not suitable for multi-year coin-cell operation. |
Compared with MAX6129BEUK50-T, MAX6126BEUR50-T adds enable functionality and better thermal stability at minor supply current increase, while ADR3450ARJZ-R7 delivers laboratory-grade accuracy at significantly higher quiescent power - making MAX6129BEUK50-T optimal for cost- and power-constrained industrial portables.
Availability
MAX6129BEUK50-T is available at Aetrix Electronics and suitable for battery-powered instrumentation, precision data acquisition, low-power sensor interfaces, and portable medical monitoring requiring stable component supply across extended production lifecycles.
Supply support for MAX6129BEUK50-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 and mixed-signal ICs for power, sensing, interface, and timing applications, with emphasis on integration, efficiency, and reliability.
The MAX6129 family delivers ultra-low-power, precision voltage references for space- and energy-constrained systems - targeting portable instrumentation, industrial sensors, and battery-operated data converters where minimal quiescent current and guaranteed stability are paramount.
FAQ
What is the guaranteed initial accuracy of the MAX6129BEUK50-T?
The MAX6129BEUK50-T is specified with ±1% initial accuracy at +25°C, corresponding to a 5.000V output ranging from 4.950V to 5.050V. This Grade-B specification is production-tested and guaranteed across the –40°C to +85°C operating temperature range, making it suitable for industrial and portable applications where tight calibration is not required.
Does the MAX6129BEUK50-T require an external output capacitor for stability?
No, the MAX6129BEUK50-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. Adding a capacitor (e.g., 1µF ceramic) improves transient response but is optional.
What is the maximum supply voltage for the MAX6129BEUK50-T?
The MAX6129BEUK50-T supports a maximum supply voltage of +13V on the IN pin relative to GND, with absolute maximum rating of VIN = –0.3V to +13V. Its operational supply range is 5.2V to 12.6V, ensuring reliable performance across common industrial and battery-derived rails including 5V, 9V, and 12V systems.
How does the MAX6129BEUK50-T perform under load current variation?
The MAX6129BEUK50-T delivers 4mA sourcing and 1mA sinking capability. Load regulation is specified at 9µV/µA (max), meaning output voltage changes by ≤36mV over the full 4mA sourcing range - translating to <0.72% deviation from 5.000V. This ensures consistent reference integrity during dynamic load conditions in multiplexed sensor systems.
Is the MAX6129BEUK50-T compatible with lead-free reflow soldering processes?
Yes, the MAX6129BEUK50-T is packaged in a RoHS-compliant, lead-free 5-pin SOT23-5 package rated for standard Pb-free reflow profiles. Its maximum lead temperature is +300°C for 10 seconds, fully compatible with IPC/JEDEC J-STD-020D moisture sensitivity level 1 (MSL-1) handling and reflow requirements.
MAX6129BEUK50-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:
- ±1%
- Temperature Coefficient:
- 100ppm/°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
MAX6129BEUK50-T FAQ
1.How can I place an order for MAX6129BEUK50-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6129BEUK50-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 MAX6129BEUK50-T reliable?
The price and inventory of MAX6129BEUK50-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6129BEUK50-T is usually 5 days.
3.What payment methods are accepted for MAX6129BEUK50-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6129BEUK50-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6129BEUK50-T?
MAX6129BEUK50-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6129BEUK50-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 MAX6129BEUK50-T?
For technical support, including MAX6129BEUK50-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6129BEUK50-T requirements.
6.How does Aetrix verify that MAX6129BEUK50-T is sourced from the original manufacturer or authorized distributors?
All MAX6129BEUK50-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 MAX6129BEUK50-T meets industry standards.
7.What is the process for return or replacement of MAX6129BEUK50-T?
All MAX6129BEUK50-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6129BEUK50-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 MAX6129BEUK50-T part is unused and in its original packaging.
Return procedure for MAX6129BEUK50-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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