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Analog Devices Inc./Maxim Integrated MAX6129BEUK25+T
- Part No.:
- MAX6129BEUK25+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6129BEUK25+T.pdf
- Description:
- IC VREF SERIES 1% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,912
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Product details
Overview
The MAX6129BEUK25+T from Maxim Integrated is a micropower, low-dropout series-mode bandgap voltage reference in a 5-pin SOT23 package, delivering a precise 2.500V output with ±1% initial accuracy and ≤100ppm/°C temperature coefficient. It operates from 2.7V to 12.6V supply, draws only 5.75µA (max) quiescent current, sustains 4mA source / 1mA sink load, and maintains stability with capacitive loads up to 10µF - ideal for high-accuracy, battery-powered precision data acquisition systems.
For engineers reviewing the MAX6129BEUK25+T datasheet, MAX6129BEUK25+T pinout, MAX6129BEUK25+T application, or MAX6129BEUK25+T equivalent, key selection criteria include ultra-low supply current, dropout voltage under 200mV at full load, guaranteed thermal hysteresis ≤140ppm, no external compensation requirement, and compatibility with space-constrained portable instrumentation designs.
Technical Context
This series-mode reference uses a BiCMOS bandgap core with internal compensation capacitance, eliminating need for external stabilization components. Its architecture enables stable operation across 0–10µF output capacitance ranges while maintaining <0.1% settling accuracy within 700ms turn-on time.
Designed for precision analog signal chains, it delivers 2.500V output with load regulation of ≤0.6µV/µA (sourcing) and ≤6.2µV/µA (sinking), line regulation ≤230µV/V, and PSRR ≥34dB at 120Hz - enabling direct use in 12–16-bit ADC/DAC reference paths without additional filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±1% (guaranteed over -40°C to +85°C; supports 12-bit ADC full-scale accuracy) |
| Initial Accuracy | ±1% (MAX6129B grade; tighter than standard industrial-grade references) |
| Temp Coefficient | ≤100ppm/°C (ensures <±0.08% output drift across full operating range) |
| Supply Current | 5.75µA max (enables >10-year battery life in µA-level standby systems) |
| Dropout Voltage | 200mV max at 4mA load (allows operation from 2.7V supply with 2.5V output margin) |
| Load Current | Sources 4mA / sinks 1mA (drives typical SAR ADC reference inputs and op-amp bias networks) |
| Stable Capacitance | 0–10µF (supports ceramic or tantalum bypass without oscillation risk) |
Pinout & Package
The MAX6129BEUK25+T is housed in a miniature 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 3–4 are internally connected no-connect terminals (may be left floating or tied to ground), and Pin 5 is OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Positive supply input | Accepts 2.7V–12.6V; no input capacitor required but 0.1µF improves transient response |
| 2 (GND) | Analog ground reference | Must be low-impedance connection to system AGND; substrate tied to this pin |
| 3, 4 (N.C.) | Internally connected, unused | No electrical function; may be left unconnected or grounded for mechanical stability |
| 5 (OUT) | Precision reference output | Delivers regulated 2.500V; stable into 0–10µF capacitive loads without external compensation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | 5.75µA max enables multi-year operation on coin-cell batteries in portable meters |
| No external capacitors needed | Internal compensation eliminates BOM cost and layout risk of external stability components |
| Low 200mV dropout | Permits use with single-cell Li-ion (3.0V min) or two-cell alkaline (3.2V min) supplies |
| Stable with 10µF load | Supports direct driving of ADC reference inputs and op-amp feedback networks |
| Miniature SOT23-5 package | 0.95mm height and 2.9mm × 1.6mm footprint saves critical space in handheld instruments |
Applications
| Battery-Powered Precision Meters | Portable Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeters and environmental sensors powered by CR2032 or AA cells requiring stable reference over full battery discharge curve. IC Role / Device Role / Timing Role: Primary voltage reference for 16-bit sigma-delta ADC, setting absolute measurement scale. Use Value: 100ppm/°C TC and 5.75µA supply current extend usable battery life beyond 5 years while maintaining <±0.1% reading error. | Use Scenario: Wireless sensor nodes logging temperature, pressure, and humidity with low-power MCU and ADC. IC Role / Device Role / Timing Role: Reference source for simultaneous sampling of multiple analog channels via multiplexed ADC. Use Value: Stability with 10µF decoupling allows integration with RF-sensitive layouts without added noise filtering. |
| High-Accuracy Portable Instrumentation | Low-Power Industrial Transmitters |
Use Scenario: Pocket-sized oscilloscopes and spectrum analyzers needing calibrated vertical scaling under varying ambient temperatures. IC Role / Device Role / Timing Role: Reference for programmable gain amplifier (PGA) and ADC front-end calibration circuitry. Use Value: ≤140ppm thermal hysteresis ensures repeatable measurements after field temperature cycling. | Use Scenario: 4–20mA loop-powered transmitters in remote monitoring applications with strict power budget constraints. IC Role / Device Role / Timing Role: Stable excitation source for RTD/thermistor bridges and reference for DAC-based current control. Use Value: 200mV dropout enables operation directly from 3.3V LDO output, reducing component count vs. higher-voltage solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3025AIDBZR | 2.5V output, ±0.2% initial accuracy, 50ppm/°C TC, 50µA supply current, SOT23-3 package | Higher accuracy and lower TC but 10× higher supply current limits battery life | Select when long-term stability and tighter TC outweigh ultra-low power needs |
| ADR3425ARJZ-R7 | 2.5V output, ±0.1% initial accuracy, 10ppm/°C TC, 120µA supply current, SOT23-5 package | Superior precision and TC but 20× higher quiescent current; requires external compensation | Choose for metrology-grade systems where power is secondary to accuracy |
Compared with REF3025AIDBZR and ADR3425ARJZ-R7, the MAX6129BEUK25+T uniquely balances sub-6µA supply current, 100ppm/°C TC, and no-external-capacitor operation - making it optimal for compact, multi-year battery-powered precision instruments where board space and energy efficiency are co-critical.
Availability
MAX6129BEUK25+T is available at Aetrix Electronics and suitable for battery-powered precision meters, portable data acquisition systems, and low-power industrial transmitters requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6129BEUK25+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 instrumentation and battery-operated data converters - prioritizing micropower operation, minimal board area, and guaranteed performance across extended temperature ranges.
FAQ
What is the guaranteed initial accuracy of the MAX6129BEUK25+T?
The MAX6129BEUK25+T is specified with ±1% initial accuracy at +25°C, representing the MAX6129B grade. This tolerance is guaranteed over the full -40°C to +85°C operating temperature range and applies to the 2.500V nominal output voltage. The device achieves this using a trimmed bandgap core in BiCMOS process, with top-mark "ADRP" confirming the B-grade variant. MAX6129BEUK25+T meets this specification without requiring post-manufacturing calibration.
Does the MAX6129BEUK25+T require external capacitors for stability?
No, the MAX6129BEUK25+T does not require external capacitors for stability due to its integrated compensation capacitor. It remains stable driving capacitive loads from 0 to 10µF when sourcing current and up to 0.4µF when sinking current. While an optional 0.1µF ceramic capacitor on the IN pin improves line-transient response, and output capacitance can reduce load-transient overshoot, neither is mandatory for basic operation - a key advantage for space-constrained designs using MAX6129BEUK25+T.
What is the maximum supply voltage for the MAX6129BEUK25+T?
The MAX6129BEUK25+T has an absolute maximum IN-to-GND rating of +13V, but its specified operational supply range is 2.7V to 12.6V. Operation above 12.6V is not characterized and may compromise long-term reliability or parametric guarantees. Within the 2.7V–12.6V range, the device maintains full performance: 2.500V output accuracy, ≤100ppm/°C temperature coefficient, and ≤5.75µA supply current. Exceeding 12.6V voids the guaranteed specifications for MAX6129BEUK25+T.
How does the MAX6129BEUK25+T perform under load current variation?
The MAX6129BEUK25+T exhibits ≤0.6µV/µA load regulation when sourcing 0–4mA and ≤6.2µV/µA when sinking 0–1mA, translating to <±2.5mV total output shift across full load range. Its dropout voltage stays ≤200mV at 4mA load, ensuring regulation even near supply rail limits. Load-transient response shows <200mV undershoot/overshoot with 1µF output capacitance, settling within 1ms - verified in typical operating characteristics plots (toc21–toc27). These characteristics make MAX6129BEUK25+T suitable for dynamic reference applications like multiplexed ADC systems.
Is the MAX6129BEUK25+T compatible with lead-free reflow processes?
Yes, the MAX6129BEUK25+T is qualified for lead-free reflow soldering per JEDEC J-STD-020. Its SOT23-5 package supports peak reflow temperatures up to +260°C for 20–40 seconds, with moisture sensitivity level (MSL) 1 - meaning unlimited floor life at ≤30°C/85% RH. The device's BiCMOS process and robust internal structure ensure parametric stability after standard Pb-free reflow profiles. No special pre-bake or handling is required before assembly, simplifying manufacturing for MAX6129BEUK25+T.
MAX6129BEUK25+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:
- ±1%
- Temperature Coefficient:
- 100ppm/°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
MAX6129BEUK25+T FAQ
1.How can I place an order for MAX6129BEUK25+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6129BEUK25+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 MAX6129BEUK25+T reliable?
The price and inventory of MAX6129BEUK25+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6129BEUK25+T is usually 5 days.
3.What payment methods are accepted for MAX6129BEUK25+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6129BEUK25+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6129BEUK25+T?
MAX6129BEUK25+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6129BEUK25+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 MAX6129BEUK25+T?
For technical support, including MAX6129BEUK25+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6129BEUK25+T requirements.
6.How does Aetrix verify that MAX6129BEUK25+T is sourced from the original manufacturer or authorized distributors?
All MAX6129BEUK25+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 MAX6129BEUK25+T meets industry standards.
7.What is the process for return or replacement of MAX6129BEUK25+T?
All MAX6129BEUK25+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6129BEUK25+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 MAX6129BEUK25+T part is unused and in its original packaging.
Return procedure for MAX6129BEUK25+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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