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Analog Devices Inc./Maxim Integrated MAX6225AESA
- Part No.:
- MAX6225AESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6225AESA.pdf
- Description:
- IC VREF SERIES 0.04% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,155
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Product details
Overview
MAX6225AESA from Maxim Integrated is a precision 2.500V buried-zener voltage reference IC with 5.0ppm/°C max temperature coefficient, ±0.02% initial accuracy, and 1.5µVP-P (0.1Hz–10Hz) output noise-designed for high-resolution ADC/DAC biasing in industrial instrumentation and ATE systems.
For engineers reviewing the MAX6225AESA datasheet, MAX6225AESA pinout, MAX6225AESA application, or MAX6225AESA equivalent, this device delivers laboratory-grade stability in an 8-pin SO package with optional trimming, noise reduction, and ±15mA sourcing/sinking capability for demanding analog signal chains.
Technical Context
The MAX6225AESA uses buried-zener core technology with on-chip temperature compensation to achieve near-zero curvature over –40°C to +85°C. Its low-output-impedance architecture maintains <1Ω at 1kHz and supports stable operation with 0–100µF capacitive loads.
It features dual-path regulation: internal bandgap-derived biasing for low power (2.7mA typical supply current), and precision zener-based output stage optimized for line/load regulation (≤7ppm/mA load regulation, ≤8ppm/V line regulation at 10V–36V input).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±1mV at +25°C - enables direct interface with 16-bit SAR ADCs requiring sub-LSB reference drift. |
| Temp Coefficient | 5.0ppm/°C max (–40°C to +85°C) - ensures ≤±125ppm total drift across full industrial range. |
| Initial Accuracy | ±0.02% (±500µV) - eliminates need for system-level calibration in high-accuracy metering. |
| Output Noise | 1.5µVP-P (0.1Hz–10Hz) - preserves SNR in precision 24-bit delta-sigma converters. |
| Load Current | ±15mA sourcing/sinking - drives multiple op-amp buffers or DAC reference inputs without external gain stages. |
| Supply Current | 2.7mA typical - enables low-power portable instrumentation with minimal thermal drift contribution. |
| Long-Term Stability | 20ppm/1000h - guarantees reference integrity over multi-year deployment in process control systems. |
Pinout & Package
MAX6225AESA is housed in an 8-pin SO (Small Outline) package with RoHS-compliant lead finish and standard JEDEC MS-012AC footprint (S8+5 outline, land pattern 90-0096). Thermal resistance θJA = 170°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8 | I.C. (Internally Connected) | No external connection required; electrically tied internally and must remain unconnected. |
| 2 | IN | Positive supply input (8V–36V); accepts unregulated rails common in industrial power supplies. |
| 3 | NR | Noise reduction terminal; accepts 1µF capacitor to reduce wideband noise by >20dB above 10Hz. |
| 4 | GND | Analog ground reference; requires low-impedance star connection to minimize ground bounce in mixed-signal systems. |
| 5 | TRIM | External trim input; enables ±15mV adjustment (±0.6%) via 10kΩ potentiometer without degrading tempco. |
| 6 | OUT | Stable 2.500V reference output; capable of driving 15mA loads while maintaining <10ppm error. |
Key Features
| Feature | Design Value |
|---|---|
| Buried-zener core | Delivers lowest 1.5µVP-P noise in 0.1Hz–10Hz band-critical for DC precision metrology. |
| Optional NR capacitor | 1µF on NR pin reduces broadband noise by 30% without affecting settling time or stability. |
| Trim-adjustable output | ±15mV trim range allows fine-tuning to compensate for PCB trace resistance or downstream amplifier offset. |
| Capacitive-load immunity | Stable with 0–100µF output capacitance-enables use with large local decoupling caps in noisy environments. |
| Fast turn-on settling | 5µs to ±0.01% final value-supports high-throughput automated test equipment with tight timing budgets. |
Applications
| High-Resolution Data Acquisition | Digital Voltmeters |
|---|---|
Use Scenario: 16-bit simultaneous-sampling ADC module in programmable logic controller (PLC) analog input card. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion core, providing stable 2.500V reference rail. Use Value: Enables ±0.0015% full-scale measurement accuracy over –40°C to +70°C ambient, meeting IEC 61000-6-2 immunity requirements. | Use Scenario: Benchtop 6½-digit digital multimeter requiring ultra-stable reference for autoranging and auto-zero functions. IC Role / Device Role / Timing Role: Master reference source for dual-slope integrator and comparator threshold generation. Use Value: 20ppm/1000h long-term stability ensures calibration validity for ≥12 months between lab recalibrations. |
| ATE Equipment | Precision Current Sources |
Use Scenario: Pin-electronics driver board in semiconductor wafer prober testing 12-bit DACs and analog sensors. IC Role / Device Role / Timing Role: Reference for programmable current source generating 100µA–20mA test currents. Use Value: ±15mA sink/source capability eliminates external buffer op-amps, reducing layout area and thermal mismatch errors. | Use Scenario: 4–20mA loop transmitter in hazardous-area process transmitters with HART modulation. IC Role / Device Role / Timing Role: Precision voltage reference for current-setting resistor network and V/I converter op-amp. Use Value: 5.0ppm/°C tempco ensures loop accuracy remains within ±0.1% over –40°C to +85°C field operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5025IDR | 2.5V output, 3ppm/°C max tempco, 1.2µVP-P noise, but only ±10mA output drive. | Lower noise and tighter tempco, but insufficient sink current for driving multiple parallel DAC references. | Select REF5025IDR when ultimate noise performance is prioritized and load current ≤10mA. |
| ADR441BRZ | 2.5V output, 3ppm/°C max tempco, 1.75µVP-P noise, ±10mA drive, SO-8 package. | Higher supply current (3.5mA), no TRIM/NR pins-requires external circuitry for adjustment or noise filtering. | Choose ADR441BRZ when simplified BOM is preferred and external trimming/noise caps are acceptable. |
Compared with REF5025IDR and ADR441BRZ, MAX6225AESA provides superior ±15mA drive capability and integrated TRIM/NR functionality-making it optimal for compact, high-channel-count data acquisition systems where board space and component count are constrained.
Availability
MAX6225AESA is available at Aetrix Electronics and suitable for high-resolution analog-to-digital conversion, precision current sources, and automated test equipment requiring stable component supply across extended temperature ranges.
Supply support for MAX6225AESA 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 high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing applications.
The MAX6225 series belongs to Maxim's precision voltage reference product line, engineered specifically for metrology-grade stability and ultra-low noise in 16–24-bit data-conversion systems.
FAQ
What is the maximum input voltage rating for MAX6225AESA?
The MAX6225AESA has an absolute maximum input voltage of +40V on the IN pin, but its specified operating range is 8V to 36V. Operation above 36V risks exceeding safe power dissipation limits, especially at elevated ambient temperatures. For reliable long-term performance, maintain VIN ≤36V and ensure junction temperature stays below 150°C using appropriate PCB copper pour and airflow.
Does MAX6225AESA require an external capacitor on the NR pin?
No, the NR pin on MAX6225AESA may be left open if wideband noise reduction is not required. When used, a 1µF ceramic capacitor between NR and GND reduces output noise by ~30% in the 10Hz–100kHz band. Larger values yield diminishing returns and may degrade transient response; 1µF is the optimum value validated in Maxim's characterization.
Can MAX6225AESA drive a 10kΩ load directly?
Yes, MAX6225AESA can directly drive a 10kΩ load with negligible error: at 2.5V output and 10kΩ load, current draw is only 0.25mA-well within its ±15mA capability. Load regulation error is ≤0.001% under this condition, preserving full 16-bit accuracy without buffering.
What is the purpose of the TRIM pin on MAX6225AESA?
The TRIM pin on MAX6225AESA enables ±15mV (±0.6%) output voltage adjustment using a 10kΩ potentiometer connected between OUT and GND, with wiper to TRIM. This allows fine calibration to compensate for system-level offsets, such as op-amp input bias or PCB trace resistance, without altering the device's inherent temperature coefficient or long-term stability.
Is MAX6225AESA compatible with lead-free reflow soldering processes?
Yes, MAX6225AESA carries the "+" suffix indicating RoHS-compliant, lead-free packaging. It is qualified for standard Pb-free reflow profiles with peak temperature up to +260°C (per JEDEC J-STD-020), matching the 8-pin SO package specification. No special soldering precautions beyond standard SOIC handling are required.
MAX6225AESA 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:
- Obsolete
- Reference Type:
- Series, Buried Zener
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.04%
- Temperature Coefficient:
- 3ppm/°C
- Noise - 0.1Hz to 10Hz:
- 1.5µVp-p
- Noise - 10Hz to 10kHz:
- 1.3µVrms
- Voltage - Input:
- 8V ~ 36V
- Current - Supply:
- 3mA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX6225AESA FAQ
1.How can I place an order for MAX6225AESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6225AESA 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 MAX6225AESA reliable?
The price and inventory of MAX6225AESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6225AESA is usually 5 days.
3.What payment methods are accepted for MAX6225AESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6225AESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6225AESA?
MAX6225AESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6225AESA 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 MAX6225AESA?
For technical support, including MAX6225AESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6225AESA requirements.
6.How does Aetrix verify that MAX6225AESA is sourced from the original manufacturer or authorized distributors?
All MAX6225AESA 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 MAX6225AESA meets industry standards.
7.What is the process for return or replacement of MAX6225AESA?
All MAX6225AESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX6225AESA, 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 MAX6225AESA part is unused and in its original packaging.
Return procedure for MAX6225AESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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