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Analog Devices Inc./Maxim Integrated MAX6250ACPA+
- Part No.:
- MAX6250ACPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX6250ACPA+.pdf
- Description:
- IC VREF SERIES 0.02% 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,444
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Product details
Overview
MAX6250ACPA+ from Maxim Integrated is a precision 5.000V buried-zener voltage reference IC with 1.0ppm/°C max temperature coefficient, ±0.02% initial accuracy, and 3.0µVP-P (0.1Hz–10Hz) output noise-designed for high-resolution ADC/DAC biasing in metrology-grade instrumentation and ATE systems.
For engineers reviewing the MAX6250ACPA+ datasheet, MAX6250ACPA+ pinout, MAX6250ACPA+ application, or MAX6250ACPA+ equivalent, key selection criteria include guaranteed ±15mA sink/source capability, 8V–36V input range, industry-standard 8-pin DIP package, and optional external trim/noise reduction features.
Technical Context
The MAX6250ACPA+ uses buried-zener core technology with low-power curvature-compensation circuitry to achieve near-zero thermal hysteresis (20ppm) and flat temperature drift across 0°C to +70°C. Its output remains stable under all capacitive loads (0–100µF) without external compensation.
It supports dual-path regulation: internal reference generation via zener diode and bandgap-independent trimming via TRIM pin (±30mV adjustment), while NR pin enables wideband noise suppression using a 1µF capacitor-reducing 0.1Hz–10Hz noise by >30% versus open-NR configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±1mV at +25°C - ensures direct compatibility with 16-bit SAR ADCs requiring exact 5V full-scale reference. |
| Temp Coefficient | 1.0ppm/°C max (0°C to +70°C) - guarantees ≤±70ppm (±0.35mV) total drift over industrial temperature range. |
| Initial Accuracy | ±0.02% (±1mV) - eliminates need for system-level calibration in high-accuracy digital voltmeters and process controllers. |
| Output Noise | 3.0µVP-P (0.1Hz–10Hz) - enables <18-bit ENOB in precision data acquisition systems with low-frequency signal integrity. |
| Load Regulation | ≤6ppm/mA sourcing (0–15mA) - maintains reference stability even when driving multiple DACs or op-amp buffers simultaneously. |
| Supply Current | 2.0–3.3mA - allows integration into low-power portable test equipment without compromising thermal stability. |
| Long-Term Stability | 20ppm/1000h - supports 5+ year calibration intervals in laboratory standards and aerospace-grade instrumentation. |
Pinout & Package
MAX6250ACPA+ is housed in an 8-pin plastic DIP (dual in-line package) with 0.3-inch body width and through-hole mounting. Pin 1 is marked by notch or dot; pins 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 rejection. |
| 3 | NR | Noise reduction node; connect 1µF capacitor to GND to reduce wideband noise by up to 40%. |
| 4 | GND | Analog ground reference; must be star-connected to minimize ground bounce in mixed-signal systems. |
| 5 | TRIM | External voltage adjust input; accepts 0–5V to shift output ±30mV (±0.6%) without affecting tempco. |
| 6 | OUT | Stable 5.000V reference output; capable of sourcing/sinking ±15mA with <10µs settling to ±0.01%. |
Key Features
| Feature | Design Value |
|---|---|
| Buried-zener architecture | Delivers lowest 1/f noise (3.0µVP-P) and highest long-term stability (20ppm/1000h) among monolithic 5V references. |
| Optional noise reduction | NR pin enables 1µF capacitor addition to cut 0.1Hz–10Hz noise by >30%, critical for sub-ppm measurement repeatability. |
| External trim capability | TRIM pin supports ±30mV fine adjustment (±0.6%) using 10kΩ potentiometer-preserves original tempco and linearity. |
| Capacitive load immunity | Stable with 0–100µF output capacitance-eliminates need for isolation resistors in noisy environments or long trace layouts. |
| High PSRR | ≥80dB ripple rejection at 1kHz (with NR cap) - prevents supply noise from modulating reference output in switch-mode power supply systems. |
Applications
| Digital Voltmeter Calibration | 16-Bit Data Acquisition System |
|---|---|
Use Scenario: Primary reference in handheld DVMs requiring NIST-traceable 5V standard with annual recalibration. IC Role / Device Role / Timing Role: Precision voltage reference source for ADC front-end, defining full-scale range and offset null point. Use Value: ±0.02% initial accuracy and 20ppm/1000h drift enable 5-year calibration cycles without field adjustment. | Use Scenario: Reference for simultaneous sampling of 8-channel 16-bit SAR ADC in industrial PLC analog input modules. IC Role / Device Role / Timing Role: Low-noise, high-current reference supplying multiple ADCs and buffer amplifiers. Use Value: ±15mA sink/source capability drives 10kΩ input impedance of eight AD7606 inputs without droop or settling error. |
| ATE Board Reference Subsystem | High-Accuracy Process Controller |
Use Scenario: Reference element in automated test equipment performing DC parametric testing of precision op-amps and voltage regulators. IC Role / Device Role / Timing Role: Stable 5V benchmark for forcing and measuring device under test (DUT) output compliance. Use Value: 1.0ppm/°C tempco ensures <±0.5 LSB error across 0°C–70°C ambient, meeting Class A ATE specifications. | Use Scenario: Setpoint reference in closed-loop temperature control system using 4–20mA transmitter with HART protocol. IC Role / Device Role / Timing Role: High-stability reference for 24-bit ΣΔ ADC measuring RTD/thermocouple signals. Use Value: Buried-zener noise floor (3.0µVP-P) enables <0.001°C resolution in platinum RTD measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5050AIDR | 5.0V output, 3ppm/°C max tempco, 1.6µVP-P noise, SO-8 package, 3.3mA supply current | Lower noise but higher tempco; requires external decoupling for full spec performance | Preferred where ultra-low noise dominates over temperature stability in lab-grade bench instruments |
| ADR445BRZ | 5.0V output, 3ppm/°C max tempco, 2.7µVP-P noise, SO-8 package, 4.5mA supply current | Higher quiescent current; superior PSRR above 10kHz but less robust against capacitive load variations | Selected when operating from noisy SMPS rails and high-frequency ripple rejection is prioritized over power efficiency |
Compared with REF5050AIDR and ADR445BRZ, the MAX6250ACPA+ offers the lowest temperature coefficient (1.0ppm/°C) and best load-regulation performance (≤6ppm/mA), making it optimal for wide-temperature industrial applications where long-term drift and sourcing capability are critical-not just noise or PSRR.
Availability
MAX6250ACPA+ is available at Aetrix Electronics and suitable for high-resolution analog-to-digital conversion, precision current source design, and automated test equipment requiring stable component supply with full RoHS compliance and traceable lot history.
Supply support for MAX6250ACPA+ 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-engineered for laboratory, industrial, and ATE systems demanding sub-ppm stability, ultra-low noise, and long-term reliability without ovenized solutions.
FAQ
What is the maximum input voltage rating for MAX6250ACPA+?
The MAX6250ACPA+ supports an absolute maximum input voltage of +40V on the IN pin, with recommended operating range of 8V to 36V. Exceeding +40V may cause permanent damage. For reliable operation at 36V input, ensure power dissipation remains below 727mW (derated above +70°C), as specified in the Absolute Maximum Ratings table of the MAX6250ACPA+ datasheet.
Does MAX6250ACPA+ require an external capacitor on the NR pin for basic operation?
No, the NR pin of MAX6250ACPA+ is optional and can be left open for standard operation. Adding a 1µF capacitor between NR and GND reduces 0.1Hz–10Hz output noise by approximately 30–40%, but does not affect DC accuracy, tempco, or stability. The MAX6250ACPA+ delivers full specification performance-including 3.0µVP-P noise-without any NR capacitor.
Can MAX6250ACPA+ drive a 10kΩ load while maintaining its specified accuracy?
Yes, MAX6250ACPA+ maintains ±0.02% initial accuracy and 1.0ppm/°C tempco while sourcing up to 15mA into a 333Ω minimum load (e.g., 5V/15mA). A 10kΩ load draws only 0.5mA, well within specification-resulting in <0.003% additional error from load regulation (≤6ppm/mA × 0.5mA = 3ppm), preserving overall system accuracy.
What is the purpose of the TRIM pin on MAX6250ACPA+, and how much can it adjust the output?
The TRIM pin on MAX6250ACPA+ allows external fine-tuning of the output voltage by ±30mV (±0.6%) using a 10kΩ potentiometer connected between OUT and GND, with wiper to TRIM. This adjustment preserves the original temperature coefficient and long-term stability-enabling system-level calibration without degrading the MAX6250ACPA+'s inherent precision.
Is MAX6250ACPA+ compatible with lead-free solder reflow processes?
Yes, MAX6250ACPA+ 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 plastic DIP package's thermal limits. No special prebake or moisture sensitivity handling is required.
MAX6250ACPA+ 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:
- ±0.02%
- Temperature Coefficient:
- 2ppm/°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
MAX6250ACPA+ FAQ
1.How can I place an order for MAX6250ACPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6250ACPA+ 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 MAX6250ACPA+ reliable?
The price and inventory of MAX6250ACPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6250ACPA+ is usually 5 days.
3.What payment methods are accepted for MAX6250ACPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6250ACPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6250ACPA+?
MAX6250ACPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6250ACPA+ 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 MAX6250ACPA+?
For technical support, including MAX6250ACPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6250ACPA+ requirements.
6.How does Aetrix verify that MAX6250ACPA+ is sourced from the original manufacturer or authorized distributors?
All MAX6250ACPA+ 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 MAX6250ACPA+ meets industry standards.
7.What is the process for return or replacement of MAX6250ACPA+?
All MAX6250ACPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6250ACPA+, 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 MAX6250ACPA+ part is unused and in its original packaging.
Return procedure for MAX6250ACPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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