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Analog Devices Inc./Maxim Integrated MAX6250BCPA+
- Part No.:
- MAX6250BCPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX6250BCPA+.pdf
- Description:
- IC VREF SERIES 0.1% 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,422
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Product details
Overview
MAX6250BCPA+ from Maxim Integrated is a precision 5.000V buried-zener voltage reference IC with ±0.02% initial accuracy, 5.0ppm/°C max temperature coefficient (0°C to +70°C), and 3.0µVP-P (0.1Hz–10Hz) output noise. It delivers ±15mA sourcing/sinking capability and supports external trimming and noise reduction for high-resolution data-conversion systems.
For engineers reviewing the MAX6250BCPA+ datasheet, MAX6250BCPA+ pinout, MAX6250BCPA+ application, or MAX6250BCPA+ equivalent, key selection criteria include initial accuracy, low-frequency noise performance, load regulation stability under ±15mA, and compatibility with capacitive loads up to 100µF in 16-bit ADC/DAC reference designs.
Technical Context
The MAX6250BCPA+ uses buried-zener core technology with on-chip temperature compensation to achieve laboratory-grade stability without heater power. Its trim-adjustment circuit allows ±30mV (±0.6%) output tuning without degrading temperature coefficient.
Wideband noise is reduced via an optional 1µF capacitor on the NR pin, while output impedance remains below 1Ω at 10kHz and ripple rejection exceeds 80dB at 100Hz - critical for clean reference operation in noisy industrial power domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±5mV at +25°C - ensures direct interface with 5V logic and 16-bit SAR ADCs requiring precise full-scale reference. |
| Tempco (max) | 5.0ppm/°C over 0°C to +70°C - limits drift to ≤350ppm (0.0175%) across operating range, supporting <1LSB error in 16-bit systems. |
| Initial Accuracy | ±0.02% (±1mV) - guarantees absolute reference tolerance without calibration in production test equipment and digital voltmeters. |
| Output Noise | 3.0µVP-P (0.1Hz–10Hz) - enables sub-16-bit noise floor in precision weigh scales and strain-gauge signal chains. |
| Load Regulation | ≤6ppm/mA sourcing (0–15mA) - maintains stability during dynamic DAC current draw, avoiding gain error in programmable current sources. |
| Supply Current | 2.0–3.3mA - enables low-power operation in battery-backed instrumentation while sustaining full output drive capability. |
| Long-Term Stability | 20ppm/1000h - ensures calibration retention over 1 year in metrology-grade standards and ATE reference modules. |
Pinout & Package
MAX6250BCPA+ is housed in an 8-pin plastic DIP package (0.300" wide) with industry-standard footprint and RoHS-compliant lead finish. Pin 1, 7, and 8 are internally connected and must remain unconnected in PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8 | I.C. (Internally Connected) | No external connection required; floating or tied to GND has no functional impact. |
| 2 | IN | Positive supply input (8V–36V); requires ≥1µF bypass capacitor to GND for ripple suppression. |
| 3 | NR | Noise reduction node; connect 1µF capacitor to GND to reduce wideband noise by >10dB. |
| 4 | GND | Analog ground reference; must be star-connected to minimize ground bounce in mixed-signal systems. |
| 5 | TRIM | External voltage divider tap point; enables ±30mV adjustment without affecting tempco or long-term drift. |
| 6 | OUT | Stable 5.000V reference output; drives capacitive loads up to 100µF with guaranteed stability. |
Key Features
| Feature | Design Value |
|---|---|
| Buried-zener core | Delivers lowest 1/f noise (3.0µVP-P) among 5V references in DIP package, critical for DC precision applications. |
| Trim-adjustable output | ±30mV range via external potentiometer enables system-level calibration without firmware or hardware revision. |
| Capacitive-load immunity | Stable with 0–100µF output capacitance - eliminates need for isolation resistors in filter-heavy sensor front-ends. |
| High sink/source drive | ±15mA capability supports direct driving of multiple op-amp bias networks or ADC reference inputs without buffer amplifiers. |
| Low thermal hysteresis | 20ppm hysteresis ensures repeatable voltage after thermal cycling - essential for field-deployed calibration standards. |
Applications
| High-Resolution Data Acquisition | Digital Voltmeters |
|---|---|
Use Scenario: 16-bit SAR ADC in portable multimeter measuring 0–5V input range with auto-ranging. IC Role / Device Role / Timing Role: Primary voltage reference providing stable 5.000V full-scale reference for ADC conversion. Use Value: ±0.02% initial accuracy and 5ppm/°C tempco ensure <±0.5LSB total error across 0–70°C, eliminating recalibration during field use. | Use Scenario: Benchtop 6½-digit DVM requiring traceable 5V reference for internal DAC and analog front-end. IC Role / Device Role / Timing Role: Precision reference source for internal 24-bit sigma-delta ADC and autoranging attenuator control. Use Value: 20ppm/1000h long-term stability and 20ppm hysteresis enable annual calibration intervals without drift-induced measurement uncertainty. |
| ATE Reference Subsystem | Precision Current Sources |
Use Scenario: Automated test equipment generating calibrated 5V reference for DUT power-rail monitoring and parametric testing. IC Role / Device Role / Timing Role: Master reference for programmable voltage sources and comparator thresholds in PXI-based ATE racks. Use Value: ±15mA sourcing/sinking supports simultaneous drive of multiple DUT reference inputs while maintaining <10ppm load regulation error. | Use Scenario: 4–20mA transmitter with HART modulation requiring ultra-stable 5V rail for DAC and isolator biasing. IC Role / Device Role / Timing Role: Regulated 5V supply reference for current-loop DAC and galvanic isolation barrier drivers. Use Value: Low 3.0µVP-P noise prevents modulation artifacts in HART frequency bands; 8V–36V input range accommodates industrial 24V supply variations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5050IDR | 5.0V, 3ppm/°C max, 1.6µVP-P noise, SO-8 package, higher quiescent current (4.5mA) | Lower noise but higher power; requires PCB redesign due to SO-8 vs. DIP-8 footprint | Preferred when board space is constrained and ultra-low noise dominates over power budget. |
| ADR445BRZ | 5.0V, 3ppm/°C max, 2.75µVP-P noise, SO-8 package, higher cost, tighter initial accuracy (±0.012%) | Higher accuracy and lower noise, but no TRIM/NR pins - limits system-level calibration flexibility | Selected for metrology-grade instruments where factory calibration suffices and external trim is unnecessary. |
Compared with REF5050IDR and ADR445BRZ, the MAX6250BCPA+ offers unique value in legacy DIP-based instrumentation, field-serviceable trim capability, and proven stability under wide capacitive loading - making it optimal for repairable, high-reliability industrial platforms where footprint and serviceability are design priorities.
Availability
MAX6250BCPA+ is available at Aetrix Electronics and suitable for high-resolution analog-to-digital converters, digital voltmeters, and automated test equipment requiring stable component supply with long-lifecycle support.
Supply support for MAX6250BCPA+ 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 and mixed-signal ICs for precision, power, and interface applications.
The MAX62xx family targets metrology-grade voltage references where buried-zener stability, low 1/f noise, and field-trimmable accuracy are mandatory - serving industrial automation, test instrumentation, and aerospace subsystems.
FAQ
What is the maximum operating temperature range for MAX6250BCPA+?
The MAX6250BCPA+ is rated for 0°C to +70°C operation, as indicated by the 'C' suffix in its part number. This commercial temperature grade is validated per the Electrical Characteristics table for all parameters including tempco (5.0ppm/°C max), initial accuracy (±0.02%), and load regulation (≤6ppm/mA). Operation outside this range may result in unguaranteed performance or reliability degradation.
Does MAX6250BCPA+ require an external capacitor on the NR pin?
No, the NR pin on MAX6250BCPA+ is optional: leaving it open provides standard 3.0µVP-P (0.1Hz–10Hz) noise performance. Adding a 1µF capacitor to NR reduces wideband noise by >10dB, but larger values yield diminishing returns. The device remains fully functional and stable without any NR capacitor, simplifying designs where ultra-low noise is not required.
Can MAX6250BCPA+ drive a 100µF output capacitor?
Yes, MAX6250BCPA+ is explicitly characterized and guaranteed stable with output capacitance from 0µF to 100µF across all load currents (±15mA), per the "Bypassing" section of the datasheet. This eliminates need for series isolation resistors in applications like sensor signal conditioning where large bulk capacitance suppresses transients and EMI.
What is the purpose of the TRIM pin on MAX6250BCPA+?
The TRIM pin on MAX6250BCPA+ enables ±30mV (±0.6%) output voltage adjustment using a 10kΩ potentiometer between OUT and GND, with the wiper connected to TRIM. This external trimming does not degrade temperature coefficient or long-term stability, allowing system-level calibration after assembly to compensate for PCB trace resistance or downstream component tolerances.
Is MAX6250BCPA+ pin-compatible with other MAX62xx variants?
Yes, all MAX6225/MAX6241/MAX6250 variants-including MAX6250BCPA+-share identical 8-pin DIP pinout and terminal functions (IN, NR, GND, TRIM, OUT, plus three I.C. pins). This allows drop-in replacement between 2.5V, 4.096V, and 5.0V versions in existing layouts, provided input voltage and load requirements remain within spec.
MAX6250BCPA+ 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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 5ppm/°C
- Noise - 0.1Hz to 10Hz:
- 3µVp-p
- Noise - 10Hz to 10kHz:
- 2.5µVrms
- Voltage - Input:
- 8V ~ 36V
- Current - Supply:
- 3.3mA
- Current - Cathode:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX6250BCPA+ FAQ
1.How can I place an order for MAX6250BCPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6250BCPA+ 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 MAX6250BCPA+ reliable?
The price and inventory of MAX6250BCPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6250BCPA+ is usually 5 days.
3.What payment methods are accepted for MAX6250BCPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6250BCPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6250BCPA+?
MAX6250BCPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6250BCPA+ 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 MAX6250BCPA+?
For technical support, including MAX6250BCPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6250BCPA+ requirements.
6.How does Aetrix verify that MAX6250BCPA+ is sourced from the original manufacturer or authorized distributors?
All MAX6250BCPA+ 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 MAX6250BCPA+ meets industry standards.
7.What is the process for return or replacement of MAX6250BCPA+?
All MAX6250BCPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6250BCPA+, 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 MAX6250BCPA+ part is unused and in its original packaging.
Return procedure for MAX6250BCPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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