My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6129AEUK33-T
- Part No.:
- MAX6129AEUK33-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6129AEUK33-T.pdf
- Description:
- VOLTAGE REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:2,120
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6129AEUK33-T from Maxim Integrated is a micropower, low-dropout bandgap voltage reference in a 5-pin SOT23 package, delivering 3.300V ±0.4% initial accuracy, 40ppm/°C max temperature coefficient, and ultra-low 7.25µA max supply current. It sources up to 4mA and sinks up to 1mA with 200mV max dropout at full load, enabling precision analog signal conditioning in space-constrained battery-powered systems.
For engineers reviewing the MAX6129AEUK33-T datasheet, MAX6129AEUK33-T pinout, MAX6129AEUK33-T application, or MAX6129AEUK33-T equivalent, key selection criteria include its guaranteed 3.3V output stability over -40°C to +85°C, compatibility with capacitive loads up to 10µF without external compensation, and suitability for high-resolution ADC/DAC biasing where long-term drift (<150ppm over 1000 hours) and low noise (174µVRMS, 10Hz–1kHz) are critical.
Technical Context
This series-mode voltage reference operates across a 3.5V to 12.6V input range while maintaining regulation under sourcing (0–4mA) and sinking (0–1mA) load conditions. Its internal compensation capacitor eliminates external stability components, and thermal hysteresis is limited to 140ppm over temperature cycling.
The device uses BiCMOS process technology with 30 transistors and substrate tied to GND. Output voltage error is dominated by initial accuracy (±0.4%), temperature coefficient (≤40ppm/°C), line regulation (≤270µV/V), and load regulation (≤7µV/µA), all specified over full industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.300V ±0.4% at +25°C - ensures 12-bit ADC accuracy over full temperature range without trimming |
| Supply Current | 7.25µA max - enables >10-year battery life in 10µA-sleep IoT sensors |
| Temperature Coefficient | 40ppm/°C max - limits drift to <132µV over -40°C to +85°C ambient swing |
| Dropout Voltage | 200mV max at 4mA load - supports operation from single Li-ion cell down to 3.5V input |
| Load Regulation | 7µV/µA max - maintains <28µV shift across full 4mA sourcing range |
| Noise (10Hz–1kHz) | 174µVRMS - meets SNR requirements for 16-bit SAR ADCs with 3.3V reference |
| Long-Term Stability | 150ppm over 1000 hours - reduces calibration frequency in portable instrumentation |
Pinout & Package
MAX6129AEUK33-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 and 4 are internally connected no-connect terminals (may be left floating or grounded), and Pin 5 is OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Positive voltage supply input | Accepts 3.5V–12.6V; no input bypass required but 0.1µF ceramic improves transient response |
| 2 (GND) | Ground reference | Substrate tie point; must be low-impedance connection to minimize noise coupling |
| 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 3.300V; stable with 0–10µF capacitive loads during sourcing, 0–0.4µF during sinking |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 7.25µA max enables multi-year operation on coin-cell batteries in wireless sensor nodes |
| No external compensation required | Integrated capacitor ensures stability with 10µF output capacitance-eliminates layout-sensitive feedback networks |
| Low dropout at full load | 200mV max dropout at 4mA allows use with 3.5V input rails, extending usable battery voltage range |
| High initial accuracy grade | A-grade ±0.4% tolerance avoids post-assembly trimming in production test flow |
| Stable over wide temperature range | -40°C to +85°C operation with 40ppm/°C TC supports automotive cabin and industrial field equipment |
Applications
| Battery-Powered Systems | Handheld Instruments |
|---|---|
Use Scenario: Portable gas detector with 16-bit ADC sampling electrochemical sensor output. IC Role / Device Role / Timing Role: Provides stable 3.3V reference for ADC conversion, ensuring <±1LSB error across operating temperature. Use Value: Ultra-low 7.25µA supply current extends AA battery life to >2 years; 40ppm/°C TC prevents calibration drift during field deployment. | Use Scenario: Handheld multimeter with dual-slope integrating ADC and LCD display. IC Role / Device Role / Timing Role: Supplies precision 3.3V reference for analog front-end gain stages and ADC reference input. Use Value: 200mV dropout enables operation down to 3.5V input-supports full measurement range until battery reaches end-of-life. |
| Precision Power Supplies | A/D and D/A Converters |
Use Scenario: Programmable bench power supply with digital voltage control and 14-bit DAC setpoint. IC Role / Device Role / Timing Role: References DAC output to generate accurate 3.3V feedback reference for error amplifier. Use Value: 150ppm long-term stability minimizes recalibration intervals; 174µVRMS noise avoids quantization uncertainty in closed-loop control. | Use Scenario: Industrial data acquisition module with simultaneous 16-bit SAR ADCs and 12-bit DACs. IC Role / Device Role / Timing Role: Shared 3.3V reference for both ADC and DAC to eliminate gain mismatch errors. Use Value: ±0.4% initial accuracy and matched TC ensure <0.05% system gain error-critical for closed-loop motor control feedback. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3333AIDBVR | 3.3V output, ±0.2% initial accuracy, 10ppm/°C TC, 3.9µA supply current, SOT23-5 package | Lower TC and higher accuracy but lower output current (5mA sink/source) and narrower input range (1.9V–5.5V) | Select REF3333AIDBVR when ultra-low TC dominates design priority and input voltage stays below 5.5V |
| ADR3433ARJZ-R7 | 3.3V output, ±0.1% initial accuracy, 10ppm/°C TC, 12µA supply current, SOT23-5 package | Higher accuracy and lower TC but 12µA supply current and 2.3V–5.5V input range limit battery headroom | Select ADR3433ARJZ-R7 for metrology-grade instruments where 0.1% accuracy justifies higher quiescent current |
Compared with REF3333AIDBVR and ADR3433ARJZ-R7, MAX6129AEUK33-T offers superior input voltage flexibility (3.5V–12.6V) and lower supply current at the cost of higher TC and initial tolerance-making it optimal for wide-input, ultra-low-power industrial sensors rather than lab-grade instruments.
Availability
MAX6129AEUK33-T is available at Aetrix Electronics and suitable for battery-powered systems, handheld instruments, precision power supplies, and A/D and D/A converters requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6129AEUK33-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 and mixed-signal ICs for industrial, medical, and communications applications, emphasizing low power, high accuracy, and small form factor.
The MAX6129 family delivers ultra-low-power series voltage references optimized for battery-operated precision measurement systems where board space, supply current, and thermal stability are critical constraints.
FAQ
What is the maximum load current that MAX6129AEUK33-T can source and sink?
MAX6129AEUK33-T can source up to 4mA and sink up to 1mA while maintaining output regulation within specifications. This capability supports direct driving of ADC reference inputs, op-amp bias networks, and low-power DACs without external buffers. The device remains stable across this full load range with capacitive loads up to 10µF during sourcing and 0.4µF during sinking, as verified in the datasheet's load-transient response plots (toc21–toc28).
Does MAX6129AEUK33-T require external capacitors for stability?
No, MAX6129AEUK33-T does not require external compensation capacitors due to its integrated internal capacitor. It is stable with output capacitances from 0 to 10µF when sourcing current and 0 to 0.4µF when sinking current. An optional 0.1µF ceramic input capacitor improves line-transient response but is not needed for basic stability-enabling minimal footprint designs in space-constrained applications like wearable sensors.
What is the supply voltage range for MAX6129AEUK33-T?
The supply voltage range for MAX6129AEUK33-T is 3.5V to 12.6V, as specified in the MAX6129_33 electrical characteristics table. This wide range allows operation from single Li-ion cells (down to 3.5V after dropout margin) up to industrial 12V rails. Dropout voltage remains ≤200mV at 4mA load, ensuring reliable regulation even near the lower limit of the input range.
How does the temperature coefficient of MAX6129AEUK33-T affect system accuracy?
With a maximum temperature coefficient of 40ppm/°C, MAX6129AEUK33-T contributes ≤132µV of output drift over a -40°C to +85°C ambient range (ΔT = 125°C). For a 16-bit 3.3V ADC, this equates to <1.1 LSB error-well within typical system accuracy budgets. The coefficient is measured via the box method and applies to the A-grade version, making MAX6129AEUK33-T suitable for industrial temperature-grade instrumentation without active compensation.
What is the turn-on settling time specification for MAX6129AEUK33-T?
MAX6129AEUK33-T settles to within 0.1% of final value in 1ms typical, as stated in the MAX6129_33 electrical characteristics table. This is confirmed by turn-on transient plots (toc30 and toc31), showing clean monotonic response without overshoot. Settling time increases slightly under heavy capacitive loading or near dropout conditions, but remains under 1.4ms across all operating conditions per the datasheet's worst-case specification.
MAX6129AEUK33-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):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 4 mA
- Tolerance:
- ±0.4%
- Temperature Coefficient:
- 40ppm/°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
MAX6129AEUK33-T FAQ
1.How can I place an order for MAX6129AEUK33-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6129AEUK33-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 MAX6129AEUK33-T reliable?
The price and inventory of MAX6129AEUK33-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6129AEUK33-T is usually 5 days.
3.What payment methods are accepted for MAX6129AEUK33-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6129AEUK33-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6129AEUK33-T?
MAX6129AEUK33-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6129AEUK33-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 MAX6129AEUK33-T?
For technical support, including MAX6129AEUK33-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6129AEUK33-T requirements.
6.How does Aetrix verify that MAX6129AEUK33-T is sourced from the original manufacturer or authorized distributors?
All MAX6129AEUK33-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 MAX6129AEUK33-T meets industry standards.
7.What is the process for return or replacement of MAX6129AEUK33-T?
All MAX6129AEUK33-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6129AEUK33-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 MAX6129AEUK33-T part is unused and in its original packaging.
Return procedure for MAX6129AEUK33-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6129AEUK33-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…
