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Analog Devices Inc./Maxim Integrated MAX6225BCPA
- Part No.:
- MAX6225BCPA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX6225BCPA.pdf
- Description:
- IC VREF SERIES 0.12% 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,337
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Product details
Overview
MAX6225BCPA from Maxim Integrated is a precision 2.500V buried-zener voltage reference in an 8-pin plastic DIP package, delivering ±0.02% initial accuracy, 5.0ppm/°C max temperature coefficient, and 1.5µVP-P (0.1Hz–10Hz) low-frequency noise. It supports ±15mA output sourcing/sinking and is optimized for high-resolution ADC/DAC biasing in metrology-grade instrumentation.
For engineers reviewing the MAX6225BCPA datasheet, MAX6225BCPA pinout, MAX6225BCPA application, or MAX6225BCPA equivalent, key selection criteria include guaranteed load regulation (≤6ppm/mA), trim-adjustable output (±25mV), stable operation with 0–100µF capacitive loads, and compatibility with high-precision 16-bit data-conversion systems requiring long-term stability (20ppm/1000h).
Technical Context
The MAX6225BCPA uses buried-zener core technology with on-chip temperature compensation to achieve near-zero curvature over 0°C to +70°C, enabling laboratory-grade voltage stability without heater power. Its low-output-impedance design (<1Ω at 1kHz) and fast 5µs turn-on settling time support dynamic load conditions in precision analog front-ends.
It features dedicated NR and TRIM pins for external noise reduction (via 1µF capacitor) and fine output adjustment (±1% range), while maintaining full specification compliance across input voltages from 8V to 36V and sink/source currents up to ±15mA - all without requiring output capacitance for stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±3mV at +25°C - ensures direct compatibility with 2.5V ADC reference rails and eliminates calibration offset in 16-bit systems. |
| Temp Coefficient | 5.0ppm/°C max (0°C to +70°C) - guarantees ≤±0.875mV total drift over full operating range, critical for thermal-stable metrology designs. |
| Noise (0.1–10Hz) | 1.5µVP-P - enables sub-LSB noise floor in 16-bit (≈39µV LSB) converters without external filtering. |
| Load Regulation | ≤6ppm/mA (sourcing), ≤6ppm/mA (sinking) - maintains <±0.015mV error across full ±15mA load swing, supporting active current-source topologies. |
| Supply Current | 2.7mA typical - allows low-power operation in battery-backed precision sensors and portable test equipment. |
| Long-Term Stability | 20ppm/1000h - provides predictable aging behavior for calibration-critical applications like digital multimeters and ATE standards. |
| Trim Range | ±25mV (±1%) - permits system-level calibration without altering PCB layout or adding external DACs. |
Pinout & Package
MAX6225BCPA is housed in an industry-standard 8-pin plastic DIP (dual in-line package) with 0.3-inch body width and through-hole mounting. Pin 1 is marked by a notch or dot; pins 1, 7, and 8 are internally connected and must remain unconnected in circuit layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 2) | Positive supply input | Accepts 8V–36V unregulated input; internal regulation rejects ripple up to 85dB @ 1kHz (CNR=1µF). |
| NR (Pin 3) | Noise reduction node | Connects external 1µF capacitor to reduce wideband noise; open-circuit if unused - no performance penalty. |
| GND (Pin 4) | Analog ground reference | Must be star-connected to system AGND; separates reference return from power return to avoid ground bounce errors. |
| TRIM (Pin 5) | External voltage adjust input | Accepts 0–2.5V control signal or potentiometer wiper; enables ±1% output tuning without affecting tempco or noise. |
| OUT (Pin 6) | Precision reference output | Delivers 2.500V with <1Ω output impedance at DC–10kHz; stable with 0–100µF capacitive loads including ceramic and tantalum. |
Key Features
| Feature | Design Value |
|---|---|
| Buried-zener core | Enables 1.5µVP-P ultra-low noise and 20ppm/1000h long-term stability - superior to bandgap references in metrology applications. |
| Optional noise reduction | 1µF capacitor on NR pin reduces broadband noise by >10× without degrading transient response or stability margin. |
| Full ±15mA drive capability | Sources/sinks up to ±15mA while maintaining <±0.015mV load regulation - eliminates need for external buffer op-amps in current-source designs. |
| Industry-standard pinout | Pin-compatible with legacy 8-pin DIP voltage references (e.g., REF02, LT1021), enabling drop-in upgrades in existing layouts. |
| Stable with all capacitive loads | Operates reliably from 0µF to 100µF output capacitance - simplifies EMI filtering and decoupling without phase-margin analysis. |
Applications
| High-Resolution Data Acquisition | Digital Multimeter Reference |
|---|---|
|
Use Scenario: 16-bit SAR ADC sampling thermocouple or strain-gauge signals in industrial PLC modules. IC Role / Device Role / Timing Role: Provides stable 2.500V reference for ADC conversion, directly determining full-scale accuracy and INL/DNL performance. Use Value: 5.0ppm/°C tempco and 1.5µVP-P noise ensure <±0.5LSB total error over temperature and time, meeting Class A DMM requirements. |
Use Scenario: Benchtop 6½-digit digital multimeter requiring traceable voltage standard with minimal self-heating drift. IC Role / Device Role / Timing Role: Serves as primary reference for autoranging ADC and calibration engine, referenced against internal 10V standard. Use Value: 20ppm/1000h long-term stability and ±0.02% initial accuracy eliminate annual recalibration needs for field-deployed units. |
| ATE Precision Bias Supply | Calibration Equipment Reference |
|
Use Scenario: Automated test equipment generating programmable precision bias for IC parametric testing (e.g., op-amp VOS, IB). IC Role / Device Role / Timing Role: Supplies regulated 2.500V to DAC-controlled current sources driving DUT bias nodes. Use Value: ±15mA sourcing/sinking and ≤6ppm/mA load regulation enable accurate 100nA–10mA bias generation without gain error from reference droop. |
Use Scenario: Portable handheld calibrator verifying sensor transmitters (4–20mA loop, RTD, thermocouple) in field service. IC Role / Device Role / Timing Role: Acts as master reference for internal 24-bit DAC generating precise mV/V outputs per NIST-traceable hierarchy. Use Value: Trim-adjustable output (±25mV) allows factory calibration to ±0.005% absolute accuracy, compensating for PCB trace resistance and solder joint variance. |
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, 3ppm/°C max, 1.2µVP-P noise, SO-8 package, higher quiescent current (3.5mA) | Superior tempco and noise, but requires PCB redesign due to SO-8 footprint and different pinout (no NR pin) | Select when ultimate stability and lower noise justify layout change and higher power budget. |
| LT1021DCN-2.5 | 2.5V, 8ppm/°C max, 2.0µVP-P noise, 8-pin PDIP, ±10mA output, no trim or NR pins | Legacy pin-compatible alternative with wider tempco and no external adjustment capability | Choose for cost-sensitive legacy replacements where ±0.05% initial accuracy suffices and trimming is unnecessary. |
Compared with REF5025IDR and LT1021DCN-2.5, the MAX6225BCPA uniquely balances 5.0ppm/°C stability, 1.5µVP-P noise, ±15mA drive, and full external adjustability in a drop-in DIP package - making it optimal for upgrading existing precision instruments without board rework.
Availability
MAX6225BCPA is available at Aetrix Electronics and suitable for high-resolution analog-to-digital conversion, digital multimeter reference design, and automated test equipment requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6225BCPA 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for precision, industrial, and communications applications.
The MAX6225 series belongs to Maxim's precision voltage reference product line, engineered specifically for metrology-grade instrumentation, calibration equipment, and high-end data acquisition systems demanding laboratory-level accuracy and stability.
FAQ
What is the maximum input voltage rating for MAX6225BCPA?
The MAX6225BCPA supports an input voltage range of 8V to 36V DC. Absolute maximum rating is +40V on the IN pin, but operation above 36V is not characterized or guaranteed. For reliable long-term performance, maintain VIN ≤ 36V under all operating conditions including transients and ripple.
Can MAX6225BCPA drive a 10µF ceramic output capacitor without instability?
Yes, the MAX6225BCPA is explicitly specified as stable with capacitive loads from 0µF to 100µF, including ceramic, tantalum, and electrolytic types. No series resistance or external compensation is required - this is verified across temperature and load current in the datasheet's "Stable for All Capacitive Loads" specification.
Does the TRIM pin on MAX6225BCPA affect temperature coefficient or noise performance?
No - the TRIM pin adjusts output voltage via an internal resistive divider without altering the buried-zener core's intrinsic characteristics. Datasheet confirms that external trimming does not degrade temperature coefficient, long-term stability, or noise performance, preserving the MAX6225BCPA's 5.0ppm/°C and 1.5µVP-P specifications across the full ±25mV adjustment range.
Is MAX6225BCPA RoHS-compliant and lead-free?
Yes, the MAX6225BCPA+ variant (as indicated by the "+" suffix in ordering information) is lead(Pb)-free and RoHS-compliant. The "+" denotes full compliance with EU RoHS Directive 2011/65/EU and related restrictions on hazardous substances.
How does MAX6225BCPA compare to MAX6225ACPA+ in terms of temperature coefficient?
The MAX6225BCPA+ has a maximum temperature coefficient of 5.0ppm/°C over 0°C to +70°C, whereas the MAX6225ACPA+ is tighter at 2.0ppm/°C. Both share identical pinout, noise (1.5µVP-P), accuracy (±0.02%), and drive capability - the "B" grade trades tempco tolerance for cost advantage in applications where ±0.875mV total drift is acceptable.
MAX6225BCPA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- ±0.12%
- Temperature Coefficient:
- 5ppm/°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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX6225BCPA FAQ
1.How can I place an order for MAX6225BCPA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6225BCPA 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 MAX6225BCPA reliable?
The price and inventory of MAX6225BCPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6225BCPA is usually 5 days.
3.What payment methods are accepted for MAX6225BCPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6225BCPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6225BCPA?
MAX6225BCPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6225BCPA 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 MAX6225BCPA?
For technical support, including MAX6225BCPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6225BCPA requirements.
6.How does Aetrix verify that MAX6225BCPA is sourced from the original manufacturer or authorized distributors?
All MAX6225BCPA 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 MAX6225BCPA meets industry standards.
7.What is the process for return or replacement of MAX6225BCPA?
All MAX6225BCPA units undergo pre-shipment inspection (PSI). If there is an issue with MAX6225BCPA, 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 MAX6225BCPA part is unused and in its original packaging.
Return procedure for MAX6225BCPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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