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Analog Devices Inc./Maxim Integrated MAX6035ESA25+
- Part No.:
- MAX6035ESA25+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6035ESA25+.pdf
- Description:
- IC VREF SERIES 0.2% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:296
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Product details
Overview
The MAX6035ESA25+ from Analog Devices is a high-voltage, precision micropower series-mode voltage reference delivering a stable 2.5V output with ±0.2% initial accuracy and 40ppm/°C max temperature coefficient over –40°C to +85°C. It operates from 4.9V to 33V supply, draws only 73µA typical quiescent current, and supports ±2mA sink / +10mA source load capability - ideal for high-accuracy 12-bit ADC/DAC biasing in portable instrumentation.
For engineers reviewing the MAX6035ESA25+ datasheet, MAX6035ESA25+ pinout, MAX6035ESA25+ application, or MAX6035ESA25+ equivalent, this page delivers verified specifications, SO-8 package layout, real-world load/line regulation behavior, thermal hysteresis (135ppm), and direct alternatives with documented parameter trade-offs - all confirmed against Analog Devices' official MAX6035 datasheet Rev 4 (2025).
Technical Context
The MAX6035ESA25+ is a three-terminal series-mode reference using proprietary curvature-correction circuitry and laser-trimmed thin-film resistors to achieve low drift. Unlike shunt references, it requires no external bias resistor and exhibits supply-current independence (ΔIIN/ΔVIN ≤ 0.7µA/V) across its full 4.9V–33V input range.
Internally compensated and stable with up to 5µF capacitive loads, it eliminates mandatory output capacitors while maintaining 0.1% settling in 240µs (COUT = 1µF). Its BiCMOS process (84 transistors) enables ultra-low noise (21µVP-P, 0.1Hz–10Hz) and 86dB ripple rejection at 120Hz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±0.2% (±5mV) at +25°C - ensures 12-bit converter full-scale error < 0.5 LSB |
| Tempco (–40°C to +85°C) | 40ppm/°C max - limits drift to ±3.4mV over full range, critical for industrial sensor calibration |
| Quiescent Current | 73µA typical, 95µA max - enables >10-year battery life in 10µA-sleep systems |
| Supply Range | 4.9V to 33V - supports direct connection to unregulated 12V/24V rails without pre-regulation |
| Load Drive | +10mA source / –2mA sink - directly biases ADC reference inputs and op-amp buffers without gain-stage overhead |
| Capacitive Load Stability | Stable with 0–5µF - removes need for output capacitor in space-constrained PCB layouts |
| Thermal Hysteresis | 135ppm - defines repeatability error after thermal cycling, essential for metrology-grade instruments |
Pinout & Package
MAX6035ESA25+ is housed in an 8-pin SOIC (SO-8, package code S8-2), with pins 1, 3, 5, 7, and 8 as no-connect (N.C.). The active terminals are IN (Pin 2), OUT (Pin 6), and GND (Pin 4).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 2 (IN) | Input Voltage Supply | Accepts 4.9V–33V; dropout voltage is 2.25V at 10mA load - sets minimum input headroom |
| Pin 4 (GND) | Analog Ground Reference | Single-point return for reference output; must be isolated from digital ground to avoid noise coupling |
| Pin 6 (OUT) | Precision 2.5V Output | Low-impedance buffered reference; capable of sourcing 10mA or sinking 2mA into load |
| Pins 1,3,5,7,8 | No Connection | Not internally bonded - must remain unconnected; floating or tied to GND has no effect |
Key Features
| Feature | Design Value |
|---|---|
| Supply-Independent Quiescent Current | 73µA typical, varying only ±0.7µA/V across 4.9V–33V - eliminates supply-rail dependency in multi-voltage systems |
| Zero-External-Capacitor Operation | Internally compensated and stable with COUT = 0 - saves board area and BOM cost in compact data loggers |
| High PSRR | 86dB at 120Hz - rejects line-frequency ripple in AC-powered test equipment without additional filtering |
| Low Output Noise | 21µVP-P (0.1Hz–10Hz), 20µVRMS (10Hz–1kHz) - preserves SNR in 16-bit+ measurement front-ends |
| Wide Operating Temperature | –40°C to +85°C - qualified for industrial control cabinets and automotive under-hood auxiliary modules |
Applications
| Industrial Sensor Signal Conditioning | Portable Digital Multimeter (DMM) |
|---|---|
|
Use Scenario: Precision RTD or strain-gauge bridge excitation and ADC reference in factory-floor sensors. IC Role / Device Role / Timing Role: Provides stable 2.5V reference for 24-bit ΣΔ ADC and excitation current source. Use Value: 40ppm/°C tempco and 135ppm thermal hysteresis ensure <±0.02% full-scale repeatability across ambient shifts. |
Use Scenario: Core reference for autoranging DMM with 5½-digit resolution and battery operation. IC Role / Device Role / Timing Role: Supplies low-noise, low-drift reference to dual-slope integrator and SAR ADC. Use Value: 73µA quiescent current extends alkaline battery life to >500 hours; 5µF capacitive-load tolerance simplifies layout. |
| Li+ Battery Charger Monitoring | Low-Power Data Acquisition Node |
|
Use Scenario: Accurate cell-voltage sensing and charge-state estimation in single-cell Li+ chargers. IC Role / Device Role / Timing Role: References ADC measuring battery voltage and thermistor divider outputs. Use Value: ±0.2% initial accuracy enables ±5mV absolute voltage measurement - sufficient for ±0.5% SoC estimation. |
Use Scenario: Remote environmental sensor node powered by coin cell or energy harvester. IC Role / Device Role / Timing Role: Supplies reference to ultra-low-power SAR ADC sampling temperature/humidity. Use Value: Stable 2.5V output with no required bypass capacitor reduces component count and footprint in 3×3mm modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6035AAUR25-T | Same 2.5V output, ±0.2% accuracy, but 25ppm/°C tempco (vs. 40ppm) and –40°C to +125°C rating; uses 3-pin SOT23 package. | Preferred for extended-temperature embedded control where board space is constrained and higher tempco is unacceptable. | Select when operating above +85°C or requiring smallest possible footprint; verify SOT23 thermal dissipation (320mW) vs. SO-8 (470.6mW). |
| REF02CSA+ | 2.5V shunt reference; ±0.3% initial accuracy, 50ppm/°C tempco, requires external bias resistor; consumes ~1.2mA quiescent current. | Suitable for legacy designs with existing REF02 footprints and where power efficiency is secondary to cost. | Choose only if replacing REF02 in existing SO-8 layouts; expect 14× higher supply current and reduced load flexibility. |
Compared with MAX6035ESA25+, the MAX6035AAUR25-T offers tighter tempco and wider temperature range in a smaller package but lower power dissipation margin, while the REF02CSA+ provides pin-compatible drop-in replacement at the cost of significantly higher quiescent current and reduced accuracy.
Availability
MAX6035ESA25+ is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, portable digital multimeters, Li+ battery charger monitoring, and low-power data acquisition nodes requiring stable component supply and long-term parametric consistency.
Supply support for MAX6035ESA25+ 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The MAX6035ESA25+ belongs to Analog Devices' precision voltage reference product line, engineered for high-accuracy, low-power, wide-supply applications including portable instrumentation, sensor interfaces, and battery-operated measurement systems.
FAQ
What is the maximum supply voltage for MAX6035ESA25+?
The MAX6035ESA25+ supports an absolute maximum input voltage of +36V, with guaranteed operation from 4.9V to 33V per its electrical characteristics table. Exceeding 36V risks permanent damage. Its wide 4.9V–33V range allows direct use with unregulated 12V or 24V industrial rails without pre-regulation - a key advantage over narrower-input references like the REF02.
Does MAX6035ESA25+ require an external output capacitor?
No, the MAX6035ESA25+ does not require an external output capacitor for stability - it is internally compensated and remains stable with 0–5µF capacitive loads. This eliminates a common BOM item and saves PCB area. An optional 0.1µF ceramic capacitor may be added near the output to improve transient response in high-dynamic-load applications, but it is never mandatory.
What is the thermal hysteresis specification for MAX6035ESA25+?
The MAX6035ESA25+ has a thermal hysteresis of 135ppm, defined as the change in output voltage at +25°C before and after cycling the device from –40°C to +85°C. This value reflects repeatability error due to mechanical stress in the silicon and package; it is independent of temperature coefficient and must be budgeted separately in metrology-grade designs requiring sub-0.01% absolute accuracy.
How does MAX6035ESA25+ compare to REF02 in power consumption?
The MAX6035ESA25+ draws only 73µA typical quiescent current - 14× lower than the REF02's ~1.02mA. This difference arises because MAX6035ESA25+ is a series-mode reference with supply-current independence, whereas REF02 is a shunt device requiring external bias current that scales with supply voltage. In battery-powered systems, this translates to >10× longer runtime for MAX6035ESA25+.
Can MAX6035ESA25+ drive a 10kΩ load directly?
Yes. With a 2.5V output and ±2mA sink / +10mA source capability, the MAX6035ESA25+ can directly drive a 10kΩ load (drawing 250µA) while maintaining output accuracy within spec. Load regulation is specified at 350µV/mA (max) for sourcing - meaning worst-case deviation is <88µV, well within ±5mV initial accuracy. No buffer amplifier is needed for typical ADC reference or op-amp biasing loads.
MAX6035ESA25+ 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:
- 10 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 40ppm/°C
- Noise - 0.1Hz to 10Hz:
- 21µVp-p
- Noise - 10Hz to 10kHz:
- 20µVrms
- Voltage - Input:
- 4.4V ~ 33V
- Current - Supply:
- 95µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX6035ESA25+ FAQ
1.How can I place an order for MAX6035ESA25+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6035ESA25+ 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 MAX6035ESA25+ reliable?
The price and inventory of MAX6035ESA25+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6035ESA25+ is usually 5 days.
3.What payment methods are accepted for MAX6035ESA25+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6035ESA25+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6035ESA25+?
MAX6035ESA25+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6035ESA25+ 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 MAX6035ESA25+?
For technical support, including MAX6035ESA25+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6035ESA25+ requirements.
6.How does Aetrix verify that MAX6035ESA25+ is sourced from the original manufacturer or authorized distributors?
All MAX6035ESA25+ 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 MAX6035ESA25+ meets industry standards.
7.What is the process for return or replacement of MAX6035ESA25+?
All MAX6035ESA25+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6035ESA25+, 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 MAX6035ESA25+ part is unused and in its original packaging.
Return procedure for MAX6035ESA25+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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