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Analog Devices Inc./Maxim Integrated MAX6029ESA25+
- Part No.:
- MAX6029ESA25+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6029ESA25+.pdf
- Description:
- IC VREF SERIES 0.2% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:779
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Product details
Overview
MAX6029ESA25+ from Maxim Integrated is a precision series-mode voltage reference IC delivering 2.500V output with ±0.15% (max) initial accuracy, 30ppm/°C (max) temperature coefficient, and ultra-low 5.75µA (max) supply current. Housed in an 8-pin SO package, it operates from 2.7V to 12.6V input and sources up to 4mA while maintaining stability with capacitive loads up to 10µF-ideal for high-resolution ADC/DAC biasing in portable instrumentation.
For engineers reviewing the MAX6029ESA25+ datasheet, MAX6029ESA25+ pinout, MAX6029ESA25+ application, or MAX6029ESA25+ equivalent, this page delivers verified specifications, SO-package terminal mapping, load regulation behavior (2.5–6.2 µV/µA), dropout voltage (200mV at 4mA), and real-world transient response data for battery-powered precision analog systems.
Technical Context
The MAX6029ESA25+ uses a bandgap-based series architecture with internal compensation, eliminating external capacitors while ensuring stability across 0–10µF output capacitance. Its low-drift design targets applications where long-term accuracy and thermal hysteresis (140ppm) must be minimized under cycling conditions.
It functions as a fixed-output, two-terminal (IN/GND/OUT) active reference with no enable pin or trimming interface. The 8-pin SO variant shares identical electrical specs with its SOT23 counterparts but provides enhanced thermal mass and layout flexibility for industrial-grade signal chains requiring extended temperature operation (–40°C to +85°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±0.005V at +25°C - ensures ≤1 LSB error in 12-bit ADCs over full temperature range. |
| Initial Accuracy | ±0.15% max - guarantees absolute reference tolerance without factory calibration. |
| Temp Coefficient | 30ppm/°C max - limits drift to ±2.4mV over –40°C to +85°C ambient swing. |
| Supply Current | 5.75µA max - enables >10-year battery life in 10µA-sleep IoT sensor nodes. |
| Dropout Voltage | 200mV at 4mA load - supports operation down to 2.7V input, compatible with single Li-ion or dual alkaline cells. |
| Load Regulation | 0.1–0.6µV/µA sourcing, 2.5–6.2µV/µA sinking - maintains tight output under dynamic DAC or sensor bias loads. |
| Noise (10Hz–1kHz) | 137µVRMS - low enough for 16-bit SAR ADCs without additional filtering. |
Pinout & Package
MAX6029ESA25+ uses an 8-pin SO (Small Outline) package with 1.27mm pitch, JEDEC MS-012AC compliant, footprint code S8+2, outline 21-0041. Pin 1 is marked with a beveled corner or dot; pins 3, 5, 7, and 8 are no-connect (N.C.) terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN | Positive supply input - accepts 2.7V to 12.6V; no bypass capacitor required but improves transient response. |
| 2 | GND | Analog ground reference - must be tied to system AGND with low-impedance path to minimize noise coupling. |
| 3 | N.C. | No connection - electrically isolated; may be grounded for mechanical stability but not required. |
| 4 | OUT | Precision 2.500V reference output - drives up to 4mA source / 1mA sink load; stable with 0–10µF capacitive loads. |
| 5 | N.C. | No connection - floating; no internal bond wire or circuitry attached. |
| 6 | N.C. | No connection - floating; no internal bond wire or circuitry attached. |
| 7 | N.C. | No connection - floating; no internal bond wire or circuitry attached. |
| 8 | N.C. | No connection - floating; no internal bond wire or circuitry attached. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | 5.75µA max - reduces quiescent power to <16µW at 2.7V, critical for energy-harvesting designs. |
| No external compensation | Internal capacitor eliminates need for external CCOMP, saving PCB area and BOM cost. |
| Capacitive load stability | Stable with 0–10µF output capacitance - supports ceramic, tantalum, and polymer caps without phase margin loss. |
| Low dropout | 200mV at full 4mA load - enables use with low-voltage rails where headroom is constrained. |
| Thermal hysteresis control | 140ppm max - ensures repeatable output after thermal cycling, vital for field-deployed test equipment. |
Applications
| Battery-Powered Data Loggers | Portable Medical Sensors |
|---|---|
Use Scenario: Continuous 16-bit ADC sampling of ECG or SpO₂ signals powered by coin-cell or Li-SOCl₂ batteries. IC Role / Device Role / Timing Role: Provides stable 2.500V reference for ADC full-scale range, directly determining measurement resolution and offset repeatability. Use Value: 30ppm/°C drift and 137µVRMS noise ensure <±0.5 LSB total error across –20°C to +60°C operating range without recalibration. |
Use Scenario: Handheld blood glucose meter with integrated analog front-end and low-power microcontroller. IC Role / Device Role / Timing Role: Supplies precision bias voltage to glucose sensor transimpedance amplifier and ADC reference input. Use Value: 5.75µA supply current extends battery life beyond 2 years; 200mV dropout allows operation down to 2.7V cell voltage. |
| Industrial Process Transmitters | Calibration Equipment |
Use Scenario: 4–20mA loop-powered temperature transmitter with HART modulation and local display. IC Role / Device Role / Timing Role: Reference source for 16-bit DAC generating precise current setpoint and for internal ADC monitoring supply rail. Use Value: ±0.15% initial accuracy and 140ppm thermal hysteresis meet IEC 61298-2 Class 0.1 requirements for analog output accuracy. |
Use Scenario: Benchtop multimeter or calibrator requiring traceable 2.500V reference output with minimal warm-up drift. IC Role / Device Role / Timing Role: Primary voltage standard for self-test and auto-calibration routines within the instrument's analog subsystem. Use Value: Long-term stability of 150ppm/1000h enables 6-month calibration intervals without external reference dependency. |
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, ±0.2% initial accuracy, 50ppm/°C TC, 50µA supply current, SOT23-3 package. | Higher drift and 10× higher supply current limit use in ultra-low-power systems. | Select REF3025AIDBZR only when board space is extremely constrained and 50ppm/°C drift is acceptable. |
| ADR3425ARJZ-R7 | 2.5V, ±0.12% initial accuracy, 10ppm/°C TC, 120µA supply current, SOT23-5 package. | Lower drift but 20× higher supply current and no SO package option. | Choose ADR3425ARJZ-R7 only when ultra-low TC dominates over battery life and package compatibility. |
Compared with REF3025AIDBZR and ADR3425ARJZ-R7, MAX6025ESA25+ uniquely balances sub-0.2% accuracy, 30ppm/°C TC, and <6µA supply current in an industry-standard 8-pin SO package-making it optimal for space-constrained yet thermally demanding industrial and medical instruments where both precision and longevity are non-negotiable.
Availability
MAX6029ESA25+ is available at Aetrix Electronics and suitable for battery-powered data loggers, portable medical sensors, industrial process transmitters, and calibration equipment requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6029ESA25+ 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 micropower, high-accuracy voltage references in space- and energy-constrained systems-emphasizing ultra-low IQ, low thermal drift, and robust capacitive-load stability without external components.
FAQ
What is the maximum load current the MAX6029ESA25+ can source?
The MAX6029ESA25+ can source up to 4mA while maintaining output regulation within specification. At 4mA load, dropout voltage remains ≤200mV, and load regulation is specified at 0.1–0.6µV/µA. Exceeding 4mA risks output deviation beyond ±0.15% accuracy and may trigger thermal shutdown in sustained operation. For higher current needs, consider buffering with a precision op-amp.
Does the MAX6029ESA25+ require an external output capacitor?
No, the MAX6029ESA25+ does not require an external output capacitor for stability-it is internally compensated and stable with 0–10µF capacitive loads. An output capacitor may be added to improve transient response during fast load steps, but it is optional and not needed for basic DC accuracy or noise reduction in most applications.
What is the operating temperature range for the MAX6029ESA25+?
The MAX6029ESA25+ is fully specified over the extended industrial temperature range of –40°C to +85°C. All key parameters-including output voltage accuracy, temperature coefficient (30ppm/°C max), supply current (5.75µA max), and load regulation-are guaranteed across this range per the datasheet's Electrical Characteristics table for MAX6029_25.
How does the MAX6029ESA25+ compare to the SOT23-packaged MAX6029EUK25+T?
The MAX6029ESA25+ and MAX6029EUK25+T share identical electrical specifications-same 2.500V output, ±0.15% accuracy, 30ppm/°C TC, and 5.75µA supply current-but differ in package: SO-8 vs. SOT23-5. The SO-8 offers better thermal performance and layout flexibility; the SOT23-5 saves board space. Pinout differs significantly-SO-8 has dedicated IN/GND/OUT pins plus five N.C., while SOT23-5 uses compact 5-pin mapping.
Can the MAX6029ESA25+ be used with a 2.5V input supply?
No-the MAX6029ESA25+ requires a minimum input voltage of 2.7V to maintain regulation at 2.500V output. With a 200mV dropout, the lowest valid input is VOUT + 200mV = 2.7V. A 2.5V supply would place the device in dropout, causing unregulated output and potential instability. Use only with VIN ≥2.7V, such as single Li-ion (3.0–4.2V) or dual alkaline (3.0V fresh).
MAX6029ESA25+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 4 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 30ppm/°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:
- 8-SOIC
MAX6029ESA25+ FAQ
1.How can I place an order for MAX6029ESA25+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6029ESA25+ 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 MAX6029ESA25+ reliable?
The price and inventory of MAX6029ESA25+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6029ESA25+ is usually 5 days.
3.What payment methods are accepted for MAX6029ESA25+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6029ESA25+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6029ESA25+?
MAX6029ESA25+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6029ESA25+ 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 MAX6029ESA25+?
For technical support, including MAX6029ESA25+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6029ESA25+ requirements.
6.How does Aetrix verify that MAX6029ESA25+ is sourced from the original manufacturer or authorized distributors?
All MAX6029ESA25+ 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 MAX6029ESA25+ meets industry standards.
7.What is the process for return or replacement of MAX6029ESA25+?
All MAX6029ESA25+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6029ESA25+, 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 MAX6029ESA25+ part is unused and in its original packaging.
Return procedure for MAX6029ESA25+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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