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Analog Devices Inc./Maxim Integrated MAX6225BESA+T
- Part No.:
- MAX6225BESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6225BESA+T.pdf
- Description:
- IC VREF SERIES 0.12% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,623
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Product details
Overview
MAX6225BESA+T 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+T datasheet, MAX6225BESA+T pinout, MAX6225BESA+T application, or MAX6225BESA+T equivalent, key selection criteria include guaranteed ±15mA sourcing/sinking capability, 8-pin SO package compatibility, low 18mW power consumption at 2.5V output, and optional external trim/noise reduction functionality.
Technical Context
This device uses buried-zener topology with on-chip temperature compensation to achieve laboratory-grade stability without heater power. Its low 20ppm/1000h long-term drift and ±25mV trim range support recalibration over system lifetime.
The reference maintains stable operation across 8V–36V input, delivers ±15mA load current with <7ppm/mA load regulation (E-grade), and exhibits excellent transient response (<5µs settling to ±0.01%)-critical for multiplexed data acquisition where reference settling time limits throughput.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±3mV at +25°C - ensures ≤0.12% absolute error before calibration in 16-bit systems (±31 LSB at 2.5V full-scale) |
| Temp Coefficient | 7.0ppm/°C max (−40°C to +85°C) - contributes ≤1.75mV drift over full industrial range, enabling sub-LSB stability in precision sensors |
| Noise (0.1–10Hz) | 1.5µVP-P - adds <0.006 LSB RMS noise to 16-bit 2.5V ADC, preserving effective resolution |
| Load Regulation | ≤7ppm/mA sourcing - holds output within ±0.0175mV per mA load change, supporting dynamic current loads in programmable gain stages |
| Supply Current | 2.7mA typical - enables low-power portable metrology designs with battery life >1 year at 100µA average draw |
| Long-Term Stability | 20ppm/1000h - guarantees <0.05% output shift over 1 year, reducing recalibration frequency in field-deployed equipment |
| Input Range | 8V to 36V - allows direct use with unregulated industrial 24V rails without pre-regulation |
Pinout & Package
MAX6225BESA+T is housed in an 8-pin SO (Small Outline) package, RoHS-compliant, with 1.27mm pitch and standard JEDEC MO-153 footprint. Pins 1, 7, and 8 are internally connected and must remain unconnected on PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 2) | Positive supply input | Accepts 8–36V; internal regulation isolates output from supply ripple - enables clean reference even with noisy 24V bus |
| NR (Pin 3) | Noise reduction node | Connects to 1µF capacitor to reduce wideband noise; open-circuit default preserves full bandwidth |
| GND (Pin 4) | Analog ground reference | Must be star-connected to minimize ground bounce; separate from digital GND in mixed-signal layouts |
| TRIM (Pin 5) | External voltage adjustment | Accepts 0–2.5V to trim output ±25mV (±1%); does not degrade tempco or long-term stability |
| OUT (Pin 6) | Precision reference output | Delivers 2.500V with <18mΩ AC impedance at 10kHz - drives 10kΩ loads with <0.001% gain error |
Key Features
| Feature | Design Value |
|---|---|
| Buried-zener core | Enables 1.5µVP-P ultra-low noise and 20ppm/1000h stability - outperforms bandgap references in metrology-grade applications |
| ±15mA bidirectional drive | Eliminates need for external buffer op-amps in DAC reference or current-source circuits - reduces BOM count and layout area |
| Optional NR capacitor | 1µF on NR pin cuts 10Hz–100kHz noise by 20dB - critical for FFT-based spectral analysis equipment |
| Stable with all capacitive loads | Operates reliably with 0–100µF output capacitance - simplifies EMI filtering without risk of oscillation |
| Industry-standard SO pinout | Direct drop-in replacement for legacy references (e.g., REF02, LT1021) - no PCB redesign required for upgrade paths |
Applications
| High-Resolution Data Acquisition | Digital Voltmeter (DVM) |
|---|---|
Use Scenario: 16-bit simultaneous-sampling ADC capturing sensor signals in environmental monitoring stations. IC Role / Device Role / Timing Role: Primary voltage reference for ADC analog front-end, establishing absolute measurement scale. Use Value: 7.0ppm/°C tempco and 1.5µVP-P noise ensure <0.005% measurement uncertainty across −40°C to +85°C operating range. | Use Scenario: Portable handheld DVM requiring 5½-digit accuracy and battery longevity. IC Role / Device Role / Timing Role: Stable 2.500V reference for dual-slope integrator and auto-zero amplifier stages. Use Value: 2.7mA supply current and 18mW power dissipation enable >20-hour battery life while maintaining 0.02% initial accuracy. |
| Automated Test Equipment (ATE) | Precision Current Source |
Use Scenario: Channel card in semiconductor wafer prober generating calibrated stimulus voltages. IC Role / Device Role / Timing Role: Reference for programmable voltage source controlling DUT bias conditions. Use Value: ±15mA sourcing/sinking supports fast load transients during device switching; <5µs settling enables 200kSPS test throughput. | Use Scenario: 4–20mA transmitter loop-powered by 24V rail with HART modulation. IC Role / Device Role / Timing Role: Setpoint reference for current-output op-amp feedback network. Use Value: 8–36V input range accepts raw industrial supply; ±25mV trim allows field calibration to NIST-traceable standards. |
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, 0.005% initial accuracy, 1.1µVP-P noise - lower drift but higher cost and 10-pin VSSOP package | Preferred for aerospace-grade systems requiring <1ppm/°C long-term drift; not pin-compatible | Select REF5025IDR when ultimate stability outweighs SO-8 footprint constraints and budget limits |
| ADR441BRZ | 2.5V, 3ppm/°C max, ±0.02% accuracy, 1.75µVP-P noise - similar performance, 8-lead SOIC but different pinout (no TRIM/NR pins) | Suitable for new designs where external trimming is unnecessary; requires layout revision due to non-identical pin mapping | Choose ADR441BRZ for simplified layout when noise and tempco meet requirements but trim flexibility is unused |
Compared with REF5025IDR and ADR441BRZ, MAX6225BESA+T uniquely combines SO-8 industry-standard pinout, integrated TRIM/NR terminals, and 7ppm/°C industrial-grade stability at lower unit cost-making it optimal for volume industrial instrumentation where moderate drift tolerance and design reuse are priorities.
Availability
MAX6225BESA+T is available at Aetrix Electronics and suitable for high-resolution analog-to-digital conversion, automated test equipment, and precision current-source applications requiring stable component supply across extended temperature ranges.
Supply support for MAX6225BESA+T 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 in 16-bit+ data-conversion systems.
FAQ
What is the maximum operating temperature range for MAX6225BESA+T?
The MAX6225BESA+T is rated for −40°C to +85°C operation, as confirmed by its "E" grade designation in the ordering table. This industrial temperature range ensures reliable performance in factory automation controllers, outdoor environmental sensors, and motor-drive feedback circuits where ambient temperatures exceed commercial limits. The device maintains all specified electrical characteristics-including 7.0ppm/°C tempco and ±0.02% initial accuracy-across this full range.
Can MAX6225BESA+T drive a 10kΩ load while maintaining accuracy?
Yes, MAX6225BESA+T can drive a 10kΩ load with negligible error: its load regulation is ≤7ppm/mA, and sourcing 0.25mA into 10kΩ introduces only 0.00175mV shift-well below 0.01% of 2.500V. The datasheet confirms stable operation up to ±15mA, making it suitable for direct connection to ADC reference inputs, op-amp bias networks, and low-power sensor excitation circuits without buffering.
Does MAX6225BESA+T require an external capacitor on the NR pin?
No, the NR pin on MAX6225BESA+T is optional: leaving it open provides full-bandwidth operation, while adding a 1µF capacitor reduces wideband noise by ~20dB. The datasheet states larger values yield diminishing returns, and omitting the capacitor simplifies layout for applications where 1.5µVP-P (0.1–10Hz) noise is already sufficient-such as DC-coupled precision amplifiers or slow-sampling data loggers.
How does the TRIM pin on MAX6225BESA+T affect long-term stability?
The TRIM pin on MAX6225BESA+T allows ±25mV (±1%) output adjustment using a 10kΩ potentiometer, and crucially, the datasheet states "external trimming does not affect temperature stability." This means the 7.0ppm/°C tempco and 20ppm/1000h long-term drift specifications remain fully guaranteed after calibration-enabling field-traceable adjustments without compromising metrological integrity in calibration labs or service depots.
Is MAX6225BESA+T compatible with lead-free reflow soldering processes?
Yes, MAX6225BESA+T carries the "+" suffix indicating RoHS-compliance and lead-free construction. Its 8-pin SO package is qualified for reflow soldering at +260°C (per JEDEC J-STD-020), matching standard lead-free assembly profiles. The datasheet explicitly lists "8 SOIC" under soldering temperature specifications, confirming compatibility with modern SMT lines without requiring special thermal profiling or underfill.
MAX6225BESA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX6225BESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6225BESA+T 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+T reliable?
The price and inventory of MAX6225BESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6225BESA+T is usually 5 days.
3.What payment methods are accepted for MAX6225BESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6225BESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6225BESA+T?
MAX6225BESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6225BESA+T 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+T?
For technical support, including MAX6225BESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6225BESA+T requirements.
6.How does Aetrix verify that MAX6225BESA+T is sourced from the original manufacturer or authorized distributors?
All MAX6225BESA+T 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+T meets industry standards.
7.What is the process for return or replacement of MAX6225BESA+T?
All MAX6225BESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6225BESA+T, 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+T part is unused and in its original packaging.
Return procedure for MAX6225BESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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