My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6129BEUK33+T
- Part No.:
- MAX6129BEUK33+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6129BEUK33+T.pdf
- Description:
- IC VREF SERIES 3.3V SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,279
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX6129BEUK33+T from Maxim Integrated is a micropower, low-dropout bandgap voltage reference in a 5-pin SOT23 package, delivering a precise 3.300V output with ±1% initial accuracy and 100ppm/°C max temperature coefficient. It operates from 3.5V to 12.6V supply, draws only 7.25µA (max) quiescent current, sustains 4mA source / 1mA sink load current, and features 200mV max dropout-making it ideal for battery-powered precision instrumentation and portable A/D converters.
For engineers reviewing the MAX6129BEUK33+T datasheet, MAX6129BEUK33+T pinout, MAX6129BEUK33+T application, or MAX6129BEUK33+T equivalent, key selection criteria include ultra-low supply current, stable operation with up to 10µF capacitive loads, no external compensation requirement, and compatibility with space-constrained, low-power analog signal chains requiring tight DC accuracy over temperature.
Technical Context
This series-mode voltage reference uses a bandgap core with internal compensation to achieve stability without external capacitors. Its architecture supports sourcing up to 4mA while maintaining 0.1% regulation over input voltage (3.5V–12.6V) and load current (0–4mA), and sinking up to 1mA with defined load regulation of ≤7µV/µA.
Designed for high-accuracy data conversion systems, the MAX6129BEUK33+T delivers 3.300V nominal output with guaranteed ±1% initial error and 100ppm/°C max drift across –40°C to +85°C, enabling reliable performance in handheld instruments and precision power supplies where long-term stability (150ppm/1000h) and thermal hysteresis (140ppm) are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.300V nominal, ±1% initial accuracy at +25°C - ensures predictable biasing for 3.3V ADCs and DACs without calibration. |
| Temperature Coefficient | 100ppm/°C max - limits output drift to ±0.825mV over –40°C to +85°C ambient range. |
| Supply Current | 7.25µA max - enables multi-year battery life in coin-cell–powered sensors and portable meters. |
| Dropout Voltage | 200mV max at 4mA load - allows operation from 3.5V input, compatible with single Li-ion or 3×AA configurations. |
| Load Regulation | ≤7µV/µA (source), ≤8.5µV/µA (sink) - maintains <0.03% output change under full 4mA load step. |
| Capacitive Load Stability | Stable with 0–10µF output capacitance - eliminates need for external compensation in noisy or dynamic load environments. |
| Noise (10Hz–1kHz) | 174µVRMS - supports 14-bit+ resolution in precision measurement front-ends without added filtering. |
Pinout & Package
The MAX6129BEUK33+T is housed in a miniature 5-pin SOT23-5 surface-mount package (JEDEC MO-178AA), occupying 70% less board area than comparable SO-8 references. 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 3.5V–12.6V; no input bypass capacitor required, but 0.1µF ceramic improves transient response. |
| 2 (GND) | Analog ground reference | Must be connected to clean system ground; 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 or EMI reduction. |
| 5 (OUT) | Precision 3.300V reference output | Drives up to 4mA source / 1mA sink; stable with 0–10µF capacitive loads; no external compensation needed. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 7.25µA max supply current | Reduces standby power by >90% vs. legacy references, extending battery life in always-on sensing nodes. |
| Internal compensation capacitor | Eliminates external compensation components, saving PCB area and BOM cost in compact designs. |
| ±1% initial accuracy (Grade B) | Meets cost-sensitive industrial and medical applications where post-calibration is impractical. |
| Stable with 10µF output capacitance | Enables direct connection to noisy digital loads (e.g., microcontroller AVCC rails) without oscillation risk. |
| 200mV max dropout at 4mA | Supports operation from marginal input rails (e.g., aged batteries or LDO outputs) while preserving regulation. |
Applications
| Battery-Powered Handheld Instruments | Precision Power Supplies |
|---|---|
Use Scenario: Portable multimeters and environmental sensors powered by two AA cells (3.0V fresh, ~2.4V end-of-life). IC Role / Device Role / Timing Role: Provides stable 3.300V reference for 16-bit SAR ADCs measuring voltage, temperature, or gas concentration. Use Value: Maintains <0.05% total error over battery discharge and –10°C to +60°C operating range, eliminating recalibration. | Use Scenario: Low-noise lab-grade bench power supply with programmable 3.3V output and 10ppm stability requirement. IC Role / Device Role / Timing Role: Serves as master reference for DAC-controlled voltage regulation loop and output monitor circuitry. Use Value: Delivers 174µVRMS noise and 100ppm/°C drift, meeting 14-bit effective resolution over 0–40°C ambient. |
| A/D and D/A Converters | Industrial Process Monitoring |
Use Scenario: 3.3V microcontroller-based data acquisition module digitizing 4–20mA sensor loops. IC Role / Device Role / Timing Role: Supplies reference to 12-bit delta-sigma ADC and 10-bit DAC used for loop calibration and feedback control. Use Value: Ensures monotonicity and <±1 LSB integral nonlinearity across –40°C to +85°C, validated per datasheet load/line regulation specs. | Use Scenario: Remote RTU monitoring pressure, flow, and level in oil/gas field equipment with wide ambient (-40°C to +85°C). IC Role / Device Role / Timing Role: Reference for isolated analog input channels feeding 16-bit sigma-delta ADCs in explosion-proof enclosures. Use Value: Long-term stability of 150ppm/1000h and thermal hysteresis of 140ppm ensure <0.1% gain drift over 5-year deployment without field recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6126BEUR33+T | Same 3.3V output, ±1% accuracy, but lower 3.5ppm/°C tempco and 3.5µA supply current; requires 1µF output cap for stability. | Better drift performance suits higher-resolution (18-bit) systems; higher cost and added capacitor increase BOM complexity. | Select when long-term drift and temperature stability outweigh board space and component count constraints. |
| REF3033AIDBZR | 3.3V output, ±0.2% initial accuracy, 50ppm/°C tempco, 50µA supply current; stable with ≥1µF output cap. | Higher accuracy and lower drift support metrology-grade applications; 7× higher supply current reduces battery life. | Choose for applications needing tighter initial tolerance and lower drift, accepting higher power and larger footprint. |
Compared with MAX6126BEUR33+T and REF3033AIDBZR, the MAX6129BEUK33+T offers the lowest quiescent current and smallest package among these 3.3V references, making it optimal for ultra-low-power, space-constrained designs where ±1% initial accuracy is sufficient and external capacitors must be minimized.
Availability
The MAX6129BEUK33+T is available at Aetrix Electronics and suitable for battery-powered handheld instruments, precision power supplies, A/D and D/A converters, and industrial process monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6129BEUK33+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX6129 family is designed for ultra-low-power, precision voltage reference applications in portable and battery-operated systems where minimal supply current, small footprint, and robust capacitive-load stability are essential.
FAQ
What is the output voltage tolerance and temperature coefficient of the MAX6129BEUK33+T?
The MAX6129BEUK33+T provides a nominal 3.300V output with ±1% initial accuracy at +25°C and a maximum temperature coefficient of 100ppm/°C over –40°C to +85°C. These specifications are guaranteed for Grade B devices per the datasheet's electrical characteristics table for MAX6129_33, ensuring predictable performance in industrial and portable applications without post-manufacturing calibration.
Does the MAX6129BEUK33+T require external capacitors for stability?
No, the MAX6129BEUK33+T does not require external compensation capacitors due to its internal compensation design. It remains stable driving capacitive loads from 0 to 10µF when sourcing current and up to 0.4µF when sinking current. An optional 0.1µF ceramic input bypass capacitor improves transient response but is not mandatory for basic operation.
What is the maximum supply current and dropout voltage of the MAX6129BEUK33+T?
The MAX6129BEUK33+T draws a maximum supply current of 7.25µA and exhibits a maximum dropout voltage of 200mV at 4mA output current. This allows reliable operation from a minimum 3.5V input supply-ideal for single-cell lithium or three-cell alkaline battery systems where headroom is limited and power efficiency is critical.
Can the MAX6129BEUK33+T drive both sourcing and sinking loads?
Yes, the MAX6129BEUK33+T can source up to 4mA and sink up to 1mA of load current while maintaining specified accuracy and regulation. Its load regulation is characterized at ≤7µV/µA for sourcing and ≤8.5µV/µA for sinking, supporting bidirectional current demands in active filter biasing, DAC reference buffering, and sensor excitation circuits.
What package type and pin configuration does the MAX6129BEUK33+T use?
The MAX6129BEUK33+T uses a 5-pin SOT23-5 surface-mount package (JEDEC MO-178AA). Pin 1 is IN, Pin 2 is GND, Pins 3 and 4 are internally connected no-connect terminals (optional GND tie), and Pin 5 is OUT. The top mark "ADRX" identifies this Grade B, 3.3V variant per the Maxim selector guide.
MAX6129BEUK33+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):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 4 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- 56µVp-p
- Noise - 10Hz to 10kHz:
- 174µVrms
- Voltage - Input:
- 3.5V ~ 12.6V
- Current - Supply:
- 7.25µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6129BEUK33+T FAQ
1.How can I place an order for MAX6129BEUK33+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6129BEUK33+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 MAX6129BEUK33+T reliable?
The price and inventory of MAX6129BEUK33+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6129BEUK33+T is usually 5 days.
3.What payment methods are accepted for MAX6129BEUK33+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6129BEUK33+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6129BEUK33+T?
MAX6129BEUK33+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6129BEUK33+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 MAX6129BEUK33+T?
For technical support, including MAX6129BEUK33+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6129BEUK33+T requirements.
6.How does Aetrix verify that MAX6129BEUK33+T is sourced from the original manufacturer or authorized distributors?
All MAX6129BEUK33+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 MAX6129BEUK33+T meets industry standards.
7.What is the process for return or replacement of MAX6129BEUK33+T?
All MAX6129BEUK33+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6129BEUK33+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 MAX6129BEUK33+T part is unused and in its original packaging.
Return procedure for MAX6129BEUK33+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6129BEUK33+T Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
