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Analog Devices Inc./Maxim Integrated MAX6225BESA+
- Part No.:
- MAX6225BESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6225BESA+.pdf
- Description:
- IC VREF SERIES 0.12% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,688
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Product details
Overview
MAX6225BESA+ from Maxim Integrated is a precision 2.500V buried-zener voltage reference IC with 7.0ppm/°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 MAX6225BESA+ datasheet, MAX6225BESA+ pinout, MAX6225BESA+ application, or MAX6225BESA+ equivalent, this page delivers verified electrical specs, SO-8 package mapping, trimming/noise-reduction interface details, and real-world selection guidance for precision analog reference design.
Technical Context
The MAX6225BESA+ uses buried-zener core technology to achieve ultra-low 1.5µVP-P noise and 20ppm/1000h long-term stability. Its internal temperature compensation yields a flat VOUT vs. T curve across –40°C to +85°C without heater power.
It supports bidirectional load current (±15mA), features optional external trim (±25mV range) and NR-pin noise filtering, and maintains stable regulation under capacitive loads up to 100µF - critical for high-precision data acquisition front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±3mV at +25°C - tight tolerance enables direct use in 16-bit SAR and sigma-delta converter references without calibration. |
| Tempco (Max) | 7.0ppm/°C over –40°C to +85°C - ensures ≤±140ppm (±0.35mV) drift across full industrial range. |
| Initial Accuracy | ±0.02% (±500µV) - eliminates need for post-manufacture trimming in most metrology-grade applications. |
| Output Noise | 1.5µVP-P (0.1Hz–10Hz) - low enough to avoid degrading ENOB in 16-bit+ converters. |
| Load Regulation | ≤7ppm/mA sourcing/sinking - holds output within ±105ppm (±0.26mV) over full ±15mA load swing. |
| Supply Current | 2.7mA typical at +25°C - enables low-power operation in battery-backed precision sensors. |
| Long-Term Stability | 20ppm/1000h - predictable aging behavior supports 10+ year calibration intervals in test equipment. |
Pinout & Package
MAX6225BESA+ is housed in an 8-pin SO (Small Outline) RoHS-compliant package (package code S8+5, outline 21-0041), with 1.27mm pitch, gull-wing leads, and standard JEDEC SOIC-8 footprint compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8 | I.C. | Internally connected; electrically isolated from user circuit - must remain unconnected on PCB. |
| 2 | IN | Positive supply input (8V–36V); requires local bypass capacitor for ripple rejection. |
| 3 | NR | Noise reduction node - accepts 1µF capacitor to reduce wideband output noise by >20dB. |
| 4 | GND | Analog ground reference; must be star-connected to minimize ground bounce in sensitive systems. |
| 5 | TRIM | External voltage adjust input - enables ±25mV (±1%) fine-tuning via 10kΩ potentiometer. |
| 6 | OUT | Precision 2.500V reference output - capable of sourcing/sinking ±15mA with <20mΩ effective output impedance at DC. |
Key Features
| Feature | Design Value |
|---|---|
| Buried-zener core | Delivers 1.5µVP-P (0.1Hz–10Hz) noise and 20ppm/1000h aging - essential for metrology-grade stability. |
| Trim-adjustable output | ±25mV range via TRIM pin preserves temperature coefficient integrity - enables system-level calibration without sacrificing drift performance. |
| NR-pin noise filtering | 1µF capacitor on NR reduces broadband noise without affecting settling time or loop stability - simplifies EMI mitigation. |
| Capacitive-load tolerant | Stable with 0–100µF output capacitance - allows use of large bulk caps for transient suppression in noisy industrial environments. |
| ±15mA bidirectional drive | Eliminates need for external buffer op-amps when driving multiple ADC references or precision current sources. |
Applications
| High-Resolution Data Acquisition | Digital Multimeter Reference |
|---|---|
Use Scenario: 16-bit delta-sigma ADC in portable environmental sensor node measuring thermocouple or RTD signals. IC Role / Device Role / Timing Role: Primary voltage reference for ADC's internal PGA and conversion core - sets absolute measurement scale. Use Value: 7.0ppm/°C tempco and 1.5µVP-P noise ensure <0.005% total error across –20°C to +60°C operating range without recalibration. |
Use Scenario: Benchtop 6½-digit digital multimeter requiring traceable 2.5V reference for autoranging and offset nulling. IC Role / Device Role / Timing Role: Master reference for dual-slope integrator and auto-zero amplifier chains - defines measurement resolution and repeatability. Use Value: ±0.02% initial accuracy and 20ppm/1000h stability support NIST-traceable calibration intervals exceeding 12 months. |
| Automated Test Equipment (ATE) | Precision Current Source Calibration |
Use Scenario: Channel card in semiconductor ATE system generating programmable analog stimulus with <10ppm linearity. IC Role / Device Role / Timing Role: Reference for DAC-controlled current/voltage source - determines absolute output accuracy and channel-to-channel matching. Use Value: ±15mA drive capability and excellent load regulation enable direct DAC output buffering without gain error from external op-amp offsets. |
Use Scenario: Calibration fixture for 4–20mA loop-powered transmitters verifying compliance to IEC 61000-4-5 surge immunity. IC Role / Device Role / Timing Role: Stable excitation source for precision shunt resistor networks - establishes known current magnitude during fault testing. Use Value: Low 18mW power dissipation and thermal stability prevent self-heating-induced drift during extended 30-minute calibration cycles. |
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, but requires ≥3.3V supply and has only 10mA sink capability. | Better noise/tempco but incompatible with 8V–36V unregulated supplies common in legacy ATE racks. | Choose REF5025IDR only if supply voltage is ≥3.3V and load current stays ≤10mA. |
| ADR441BRZ | 2.5V, 3ppm/°C max, 1.75µVP-P noise, SO-8, ±10mA drive, but no TRIM/NR pins and higher 3.5mA supply current. | Lacks external trimming and noise-filtering flexibility - limits system-level calibration and EMI hardening options. | Choose ADR441BRZ when board space is constrained and fixed-output, no-trim operation is acceptable. |
Compared with REF5025IDR and ADR441BRZ, MAX6225BESA+ uniquely supports wide-input-voltage operation (8–36V), ±15mA drive, and configurable trimming/noise reduction - making it the only choice for ruggedized, field-calibratable precision instruments with legacy power architectures.
Availability
MAX6225BESA+ 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 MAX6225BESA+ 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 - with emphasis on reliability and specification rigor.
The MAX6225 series belongs to Maxim's precision voltage reference product line, engineered specifically for metrology-grade stability and low-noise operation in test, measurement, and industrial control systems.
FAQ
What is the maximum input voltage rating for MAX6225BESA+?
The MAX6225BESA+ has an absolute maximum input voltage of +40V, but its specified operating range is 8V to 36V. Operation above 36V risks exceeding safe power dissipation limits in the SO-8 package, especially at elevated ambient temperatures. For reliable long-term use, maintain VIN ≤ 36V and ensure junction temperature remains below 125°C per derating curves.
Can MAX6225BESA+ drive a 10kΩ load while maintaining accuracy?
Yes - MAX6225BESA+ can drive a 10kΩ load (250µA at 2.5V) with negligible error: its load regulation is ≤7ppm/mA, so 250µA induces <2ppm (0.005mV) shift. This is well within the ±0.02% initial accuracy spec, confirming suitability for high-impedance ADC reference inputs and op-amp bias networks.
Does MAX6225BESA+ require an external capacitor on the NR pin?
No - the NR pin may be left open if wideband noise reduction is not required. However, adding a 1µF capacitor reduces output noise by >20dB in the 10Hz–10kHz band. Larger values yield diminishing returns; 1µF is the optimal trade-off between noise suppression and board area per Maxim's characterization data.
Is MAX6225BESA+ compatible with lead-free reflow soldering?
Yes - the "+" suffix in MAX6225BESA+ denotes 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 SOIC package specifications in Maxim's official package documentation.
How does the TRIM pin affect temperature coefficient in MAX6225BESA+?
The TRIM pin in MAX6225BESA+ allows ±25mV adjustment without degrading temperature coefficient - confirmed in the datasheet's "Detailed Description" section. External trimming alters the output voltage offset but preserves the underlying buried-zener's intrinsic thermal stability, ensuring the 7.0ppm/°C max tempco remains valid across the full trim range.
MAX6225BESA+ 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:
- Active
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX6225BESA+ FAQ
1.How can I place an order for MAX6225BESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6225BESA+ 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 MAX6225BESA+ reliable?
The price and inventory of MAX6225BESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6225BESA+ is usually 5 days.
3.What payment methods are accepted for MAX6225BESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6225BESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6225BESA+?
MAX6225BESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6225BESA+ 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 MAX6225BESA+?
For technical support, including MAX6225BESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6225BESA+ requirements.
6.How does Aetrix verify that MAX6225BESA+ is sourced from the original manufacturer or authorized distributors?
All MAX6225BESA+ 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 MAX6225BESA+ meets industry standards.
7.What is the process for return or replacement of MAX6225BESA+?
All MAX6225BESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6225BESA+, 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 MAX6225BESA+ part is unused and in its original packaging.
Return procedure for MAX6225BESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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