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Analog Devices Inc./Maxim Integrated MAX6225BEPA+
- Part No.:
- MAX6225BEPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX6225BEPA+.pdf
- Description:
- IC VREF SERIES 0.12% 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,069
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Product details
Overview
The MAX6225BEPA+ from Maxim Integrated is a precision 2.500V buried-zener voltage reference with ±0.02% initial accuracy, 7.0ppm/°C max temperature coefficient over –40°C to +85°C, and 1.5µVP-P (0.1Hz–10Hz) output noise-designed for high-resolution ADC/DAC biasing in test equipment and industrial control systems.
For engineers reviewing the MAX6225BEPA+ datasheet, MAX6225BEPA+ pinout, MAX6225BEPA+ application, or MAX6225BEPA+ equivalent, this device is selected for metrology-grade stability, low-noise analog signal chains, and applications requiring long-term drift <20ppm/1000h and ±15mA load drive capability.
Technical Context
This device uses buried-zener core technology with on-chip temperature compensation to achieve near-zero thermal curvature across –40°C to +85°C. Its low 18mW typical power consumption enables use in thermally constrained precision systems without self-heating degradation.
It supports both sourcing and sinking up to ±15mA while maintaining ≤7ppm/mA load regulation and ≤35ppm/V line regulation (10V–36V input), with stable operation into capacitive loads from 0µF to 100µF-enabling direct interface with SAR and sigma-delta ADC reference inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±0.003V at +25°C - ensures 16-bit DAC/ADC full-scale accuracy without calibration. |
| Tempco (Max) | 7.0ppm/°C over –40°C to +85°C - limits voltage drift to ±1.4mV across full industrial range. |
| Initial Accuracy | ±0.02% (±0.5mV) - eliminates need for post-assembly trimming in production test systems. |
| Output Noise | 1.5µVP-P (0.1Hz–10Hz) - preserves SNR in 24-bit delta-sigma converters. |
| Load Current | ±15mA sourcing/sinking - drives multiple op-amp reference buffers or ADC VREF pins directly. |
| Long-Term Stability | 20ppm/1000h - guarantees <0.1% output shift over 5 years in uncalibrated instrumentation. |
| Supply Current | 2.7mA typical - enables low-power portable metrology devices with battery backup. |
Pinout & Package
MAX6225BEPA+ is housed in an 8-pin plastic DIP package (0.300" wide), RoHS-compliant, with through-hole mounting and industry-standard footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8 | I.C. | Internally connected; no external connection required or permitted. |
| 2 | IN | Positive supply input (8V–36V); must be bypassed externally for ripple rejection. |
| 3 | NR | Noise reduction node; accepts optional 1µF capacitor to reduce wideband noise. |
| 4 | GND | Analog ground reference; requires low-impedance star connection for noise immunity. |
| 5 | TRIM | External adjustment input; enables ±25mV trim range (±1%) via 10kΩ potentiometer. |
| 6 | OUT | Stable 2.500V reference output; capable of driving capacitive loads up to 100µF. |
Key Features
| Feature | Design Value |
|---|---|
| Buried-zener core | Delivers lowest 1.5µVP-P noise in 0.1Hz–10Hz band-critical for DC precision measurements. |
| Optional NR capacitor | 1µF on NR pin reduces wideband noise without degrading transient response or stability. |
| Trim-adjustable output | ±25mV trim range allows system-level calibration to compensate for PCB trace resistance and layout errors. |
| Capacitive-load tolerant | Stable with 0–100µF output capacitance-eliminates need for isolation resistors in noisy environments. |
| High sink/source capability | ±15mA drive supports direct connection to multiple reference buffers or multiplexed ADC inputs. |
Applications
| High-Resolution Data Acquisition | Digital Voltmeters (DVMs) |
|---|---|
Use Scenario: 24-bit sigma-delta ADC front-end in portable calibration standards. IC Role / Device Role / Timing Role: Primary voltage reference for ADC VREF input, defining full-scale range and LSB weight. Use Value: 7.0ppm/°C tempco and 20ppm/1000h stability ensure <±1LSB error over temperature and time without recalibration. |
Use Scenario: Benchtop 6½-digit DVM requiring absolute accuracy better than 10ppm. IC Role / Device Role / Timing Role: Precision reference for internal ratiometric measurement engine and autoranging circuitry. Use Value: 1.5µVP-P low-frequency noise prevents flicker-induced digit instability during slow integrations. |
| ATE Equipment Reference | Precision Current Sources |
Use Scenario: Channel reference in automated test systems validating 16-bit DACs and sensor transmitters. IC Role / Device Role / Timing Role: Stable excitation source for current-loop and voltage-output DUT testing. Use Value: ±15mA sourcing/sinking enables direct drive of 0–20mA or 4–20mA loop simulators without external amplifiers. |
Use Scenario: Setpoint reference for programmable current sources used in LED driver characterization. IC Role / Device Role / Timing Role: Fixed-voltage reference for op-amp-based Howland or improved-Howland current sources. Use Value: Low 18mW power dissipation avoids thermal crosstalk with adjacent current-sense resistors and shunts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR441BRZ | 2.5V output, 3ppm/°C max tempco, 1.75µVP-P noise, SOIC-8 package only | Lower tempco but higher noise; not available in PDIP; requires tighter layout for thermal stability | Preferred where board space is constrained and SOIC-8 is acceptable; less suitable for through-hole legacy designs. |
| REF5025ID | 2.5V output, 3ppm/°C max tempco, 3µVP-P noise, SOIC-8, higher 4.2mA supply current | Higher power consumption and noise; optimized for low-drift rather than ultra-low-noise performance | Chosen when long-term drift (<10ppm/1000h) outweighs noise requirements; unsuitable for sub-2µVP-P systems. |
Compared with ADR441BRZ and REF5025ID, the MAX6225BEPA+ offers the lowest noise (1.5µVP-P) and PDIP packaging for legacy test fixtures, while trading slightly higher tempco (7ppm/°C) for superior load regulation and capacitive-load tolerance-making it optimal for ruggedized, multi-channel ATE and portable metrology.
Availability
MAX6225BEPA+ is available at Aetrix Electronics and suitable for high-resolution data acquisition, digital voltmeters, ATE equipment, and precision current sources requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX6225BEPA+ 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 MAX6225 series belongs to Maxim's precision voltage reference product line, engineered specifically for metrology-grade stability and ultra-low-noise operation in test and measurement, industrial control, and high-end data conversion systems.
FAQ
What is the maximum operating temperature range for the MAX6225BEPA+?
The MAX6225BEPA+ is rated for operation from –40°C to +85°C. This extended industrial temperature range is confirmed in the Ordering Information table and Electrical Characteristics section, where all "E" grade parts-including MAX6225BEPA+-are explicitly specified for –40°C to +85°C operation with 7.0ppm/°C max temperature coefficient.
Does the MAX6225BEPA+ require an external capacitor on the NR pin?
No, the NR pin on the MAX6225BEPA+ is optional: it may be left open if wideband noise reduction is not required. When used, a 1µF capacitor between NR and GND reduces output noise, as verified in Figure 2 and Typical Operating Characteristics (TOC10–TOC12). Larger values yield diminishing returns per datasheet guidance.
Can the MAX6225BEPA+ drive a 100µF output capacitor?
Yes-the MAX6225BEPA+ is explicitly characterized as stable with capacitive loads from 0µF to 100µF across all load currents, per the "Bypassing" section and Absolute Maximum Ratings. This eliminates need for series isolation resistors in applications with large local decoupling or filtering caps.
What is the trim-adjustment range for the MAX6225BEPA+?
The MAX6225BEPA+ supports ±25mV output adjustment via the TRIM pin using a 10kΩ potentiometer, as stated in the Electrical Characteristics table under "Trim-Adjustment Range" for E-grade parts. This corresponds to ±1% of nominal 2.500V output and does not degrade temperature stability.
Is the MAX6225BEPA+ pin-compatible with other MAX6225 variants?
Yes-all MAX6225 variants-including MAX6225BEPA+, MAX6225AEPA+, and MAX6225BCPA+-share identical 8-pin PDIP pinout and terminal functions per the Pin Configuration diagram and Pin Description table. Differences are limited to temperature range, tempco, and initial accuracy-not pin assignment or electrical interface.
MAX6225BEPA+ 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:
- 7ppm/°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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX6225BEPA+ FAQ
1.How can I place an order for MAX6225BEPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6225BEPA+ 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 MAX6225BEPA+ reliable?
The price and inventory of MAX6225BEPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6225BEPA+ is usually 5 days.
3.What payment methods are accepted for MAX6225BEPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6225BEPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6225BEPA+?
MAX6225BEPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6225BEPA+ 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 MAX6225BEPA+?
For technical support, including MAX6225BEPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6225BEPA+ requirements.
6.How does Aetrix verify that MAX6225BEPA+ is sourced from the original manufacturer or authorized distributors?
All MAX6225BEPA+ 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 MAX6225BEPA+ meets industry standards.
7.What is the process for return or replacement of MAX6225BEPA+?
All MAX6225BEPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6225BEPA+, 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 MAX6225BEPA+ part is unused and in its original packaging.
Return procedure for MAX6225BEPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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