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Analog Devices Inc./Maxim Integrated MAX6029EUK21-T
- Part No.:
- MAX6029EUK21-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6029EUK21-T.pdf
- Description:
- VOLTAGE REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:2,433
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Product details
Overview
The MAX6029EUK21-T from Maxim Integrated is a micropower, low-dropout bandgap voltage reference delivering 2.048V output with ±0.15% initial accuracy, 30ppm/°C max temperature coefficient, and ultra-low 5.25µA max supply current in a 5-pin SOT23 package. It sources up to 4mA and sinks up to 1mA, operates from 2.5V to 12.6V, and features 200mV dropout-making it ideal for precision battery-powered instrumentation and ADC/DAC biasing.
For engineers reviewing the MAX6029EUK21-T datasheet, MAX6029EUK21-T pinout, MAX6029EUK21-T application, or MAX6029EUK21-T equivalent, key selection criteria include output stability under capacitive loads up to 10µF, no external compensation requirement, thermal hysteresis of 140ppm, long-term drift of 150ppm over 1000 hours, and guaranteed operation across –40°C to +85°C.
Technical Context
The MAX6029EUK21-T is a series-mode bandgap reference using BiCMOS process technology (30 transistors), internally compensated to ensure stability without external capacitors. Its architecture supports sourcing and sinking load current while maintaining tight output regulation across wide input voltage (2.5V–12.6V) and temperature (–40°C to +85°C) ranges.
It achieves precision via box-method temperature coefficient characterization and guarantees 0.1% output settling in ≤450µs at turn-on. Dynamic performance includes 30µVP-P (0.1Hz–10Hz) noise and 43dB ripple rejection at 120Hz, enabling use in high-resolution data acquisition systems where reference integrity directly impacts LSB accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048V ±0.15% at +25°C - enables direct interface with 12-bit ADCs requiring 2.048V full-scale reference. |
| Temp Coefficient | ≤30ppm/°C - ensures <±0.012% output drift over –40°C to +85°C, critical for portable metrology. |
| Supply Current | ≤5.25µA - extends battery life in coin-cell–powered devices beyond 10 years at 10µA average system load. |
| Dropout Voltage | 200mV at 4mA - allows operation from 2.5V supply while maintaining regulation, supporting single-cell LiFePO₄ or alkaline systems. |
| Load Regulation | 0.22–0.7µV/µA - maintains <100µV shift from 0 to 4mA sourcing, preserving linearity in sensor signal chains. |
| Noise (0.1–10Hz) | 30µVP-P - contributes <0.015 LSB error in 16-bit 2.048V-range converters. |
| Stable Capacitance | 0–10µF - eliminates need for output capacitor in space-constrained designs, reducing BOM count and layout area. |
Pinout & Package
Package: 5-pin SOT23-5 (U5-1), 2.9mm × 1.6mm footprint, 70% smaller than SO-8 alternatives.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Positive Supply Input | Accepts 2.5V–12.6V; internal regulation begins here; no input bypass required but 0.1µF improves transient response. |
| 2 (GND) | Analog Ground Reference | Common return for reference output and internal bandgap; must be low-impedance path to minimize noise coupling. |
| 3, 4 (N.C.) | No Connection | Internally unconnected; may be left floating or tied to GND per layout best practice-no electrical function. |
| 5 (OUT) | Precision Reference Output | Delivers stable 2.048V; capable of sourcing 4mA/sinking 1mA; stable with 0–10µF capacitive loads. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 5.25µA max enables >10-year battery life in always-on IoT sensors with 20µA system sleep current. |
| Internal compensation | Eliminates external capacitor requirement-reduces PCB area by ≥1.5mm² and removes capacitor aging/tolerance risks. |
| Low thermal hysteresis | 140ppm ensures repeatable output after thermal cycling-critical for field-deployed calibration equipment. |
| Wide supply range | 2.5V–12.6V operation supports single-cell, multi-cell, and industrial rail inputs without external regulators. |
| High sink/source capability | 4mA source / 1mA sink drives ADC reference inputs, op-amp bias networks, and small DACs directly-no buffer needed. |
Applications
| Hand-Held Multimeter | Precision RTD Signal Chain |
|---|---|
Use Scenario: Portable 4½-digit DMM measuring resistance, voltage, and current with auto-ranging and battery power. IC Role / Device Role / Timing Role: Provides 2.048V reference for dual-slope and sigma-delta ADCs, ensuring consistent full-scale calibration across battery discharge. Use Value: 30ppm/°C TC and 150ppm long-term drift maintain 0.01% measurement accuracy over 2-year field deployment without recalibration. | Use Scenario: Industrial temperature transmitter using 3-wire Pt100 RTD with 24-bit ΣΔ ADC and HART modulation. IC Role / Device Role / Timing Role: Supplies excitation current reference and ADC reference simultaneously in ratiometric configuration. Use Value: 200mV dropout allows operation from 3.3V LDO; 4mA sourcing drives 1mA RTD bridge; 30µVP-P noise avoids digitization dither in sub-0.1°C resolution. |
| Battery-Powered Data Logger | Portable ECG Front-End |
Use Scenario: Solar-charged environmental logger recording temperature, humidity, and barometric pressure every 5 minutes. IC Role / Device Role / Timing Role: Reference for SAR ADC sampling analog sensor outputs during brief active periods. Use Value: 5.25µA supply current dominates system sleep budget-enables 5-year operation on 2000mAh Li-ion cell with 10-second wake cycles. | Use Scenario: Wearable 3-lead ECG monitor with analog front-end, 16-bit ADC, and Bluetooth LE transmission. IC Role / Device Role / Timing Role: Low-noise reference for instrumentation amplifier gain-setting and ADC conversion. Use Value: 30µVP-P (0.1–10Hz) noise floor prevents obscuring <50µV cardiac signals; 10µF load stability simplifies filtering design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6012AEUR+T | 2.048V, 0.1% initial accuracy, 25ppm/°C TC, 3.5µA supply current, SOT23-3 package (no IN/GND separation). | Lower supply current but only 1mA source/sink; no separate IN/GND pins limits layout flexibility in noisy environments. | Select when ultra-low current (<3.5µA) is primary constraint and load is light; avoid if >1mA sourcing or ground isolation needed. |
| REF3020AIDBZR | 2.048V, 0.2% initial accuracy, 50ppm/°C TC, 50µA supply current, SOT23-3 package. | Higher current draw and worse TC reduce battery life and temperature stability; lacks sink capability. | Choose only for cost-sensitive, non-battery applications where 50ppm/°C TC and 50µA current are acceptable trade-offs. |
Compared with MAX6012AEUR+T and REF3020AIDBZR, the MAX6029EUK21-T delivers superior thermal stability (30ppm/°C vs. 25/50), higher sink capability (1mA vs. 0/0), and dedicated IN/GND pins for improved PSRR-making it optimal for precision, battery-constrained, and mixed-signal systems demanding long-term repeatability.
Availability
MAX6029EUK21-T is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical devices, and precision data acquisition systems requiring stable component supply, RoHS-compliant sourcing, and extended temperature support.
Supply support for MAX6029EUK21-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 MAX6029 series was developed specifically for ultra-low-power, high-accuracy voltage references in space- and energy-constrained systems-emphasizing micropower operation, internal compensation, and robustness across –40°C to +85°C.
FAQ
What is the maximum load capacitance supported by the MAX6029EUK21-T without external compensation?
The MAX6029EUK21-T is stable with output capacitances from 0 to 10µF when sourcing current and from 0 to 0.4µF when sinking current. This eliminates the need for external compensation capacitors in most applications, reducing component count and PCB area. The internal compensation ensures phase margin remains adequate across this full range, verified per datasheet Figure 10–14 load-transient waveforms.
Does the MAX6029EUK21-T require an input bypass capacitor?
The MAX6029EUK21-T does not require an input bypass capacitor for basic operation or stability. However, a 0.1µF ceramic capacitor placed close to the IN pin improves line-transient response, as shown in datasheet Figures 18–20. This optional capacitor reduces overshoot during supply voltage steps but is unnecessary for static regulation or low-frequency applications.
What is the dropout voltage specification for the MAX6029EUK21-T at full load?
The MAX6029EUK21-T has a guaranteed dropout voltage of 200mV at 4mA output source current, defined as the minimum VIN − VOUT differential required to maintain output regulation within 0.1% of nominal 2.048V. At zero load, dropout is 100mV. This allows reliable operation from a 2.5V supply even under full 4mA load, critical for single-cell battery systems.
How does the MAX6029EUK21-T achieve its 30ppm/°C temperature coefficient?
The MAX6029EUK21-T achieves its 30ppm/°C max temperature coefficient through curvature-corrected bandgap core design and box-method characterization across –40°C to +85°C. The coefficient is calculated as (VMAX − VMIN) / (∆T × V+25°C) per Note 2, and is guaranteed by design-not production tested-ensuring statistical confidence in thermal stability without binning overhead.
Is the MAX6029EUK21-T pin-compatible with other variants in the MAX6029 family?
Yes, all SOT23-5 variants of the MAX6029-including MAX6029EUK25-T, MAX6029EUK30-T, and MAX6029EUK41-T-share identical pinout (IN, GND, N.C., N.C., OUT) and package dimensions. Only the output voltage differs; board layouts designed for MAX6029EUK21-T can accommodate any 2.048V–5.0V variant without modification, enabling flexible BOM management.
MAX6029EUK21-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):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 4 mA
- Tolerance:
- ±0.15%
- Temperature Coefficient:
- 30ppm/°C
- Noise - 0.1Hz to 10Hz:
- 30µVp-p
- Noise - 10Hz to 10kHz:
- 115µVrms
- Voltage - Input:
- 2.5V ~ 12.6V
- Current - Supply:
- 5.25µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6029EUK21-T FAQ
1.How can I place an order for MAX6029EUK21-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6029EUK21-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 MAX6029EUK21-T reliable?
The price and inventory of MAX6029EUK21-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6029EUK21-T is usually 5 days.
3.What payment methods are accepted for MAX6029EUK21-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6029EUK21-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6029EUK21-T?
MAX6029EUK21-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6029EUK21-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 MAX6029EUK21-T?
For technical support, including MAX6029EUK21-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6029EUK21-T requirements.
6.How does Aetrix verify that MAX6029EUK21-T is sourced from the original manufacturer or authorized distributors?
All MAX6029EUK21-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 MAX6029EUK21-T meets industry standards.
7.What is the process for return or replacement of MAX6029EUK21-T?
All MAX6029EUK21-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6029EUK21-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 MAX6029EUK21-T part is unused and in its original packaging.
Return procedure for MAX6029EUK21-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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