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Analog Devices Inc./Maxim Integrated MAX6250BESA+
- Part No.:
- MAX6250BESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6250BESA+.pdf
- Description:
- IC VREF SERIES 0.1% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:261
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Product details
Overview
MAX6250BESA+ from Maxim Integrated is a precision 5.000V buried-zener voltage reference IC designed for high-resolution analog signal chains. It delivers ±0.02% initial accuracy, 7.0ppm/°C max temperature coefficient over –40°C to +85°C, 3.0µVP-P (0.1Hz–10Hz) output noise, ±15mA load drive capability, and stable operation with capacitive loads up to 100µF - enabling use in 16-bit ADC/DAC reference designs.
For engineers reviewing the MAX6250BESA+ datasheet, MAX6250BESA+ pinout, MAX6250BESA+ application, or MAX6250BESA+ equivalent, key selection criteria include its guaranteed 7ppm/°C tempco at extended temperature, low-noise zener architecture, external trim and noise-reduction terminals, and SO-8 package compatibility with industrial-grade layout requirements.
Technical Context
The MAX6250BESA+ employs buried-zener core technology with on-chip temperature compensation to achieve laboratory-grade stability without heater power. Its output is trimmed via an internal resistor ladder referenced to the TRIM pin, allowing ±30mV adjustment without degrading tempco performance.
Wideband noise is suppressed using a dedicated NR pin accepting a 1µF capacitor; output impedance remains below 1Ω up to 10kHz, and ripple rejection exceeds 80dB at 1kHz with NR bypassing - critical for clean reference rails in mixed-signal SoCs and metrology front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±0.005V at +25°C - ensures direct interface with 5V ADC full-scale ranges without gain calibration. |
| Tempco (Max) | 7.0ppm/°C over –40°C to +85°C - supports <±0.001% output drift across industrial temperature range. |
| Initial Accuracy | ±0.02% - eliminates need for system-level trimming in portable test equipment and digital multimeters. |
| Output Noise | 3.0µVP-P (0.1Hz–10Hz), 2.5µVRMS (10Hz–1kHz) - preserves ENOB in 16-bit SAR and sigma-delta converters. |
| Load Regulation | ±7ppm/mA sourcing/sinking - maintains reference integrity under dynamic DAC or sensor-bias load changes. |
| Supply Current | 3.3mA max - enables low-power battery-operated precision instruments with minimal thermal drift. |
| Long-Term Stability | 20ppm/1000h - guarantees calibration retention in automated test equipment (ATE) without frequent recalibration. |
Pinout & Package
MAX6250BESA+ uses an 8-pin SO (Small Outline) package with industry-standard footprint (outline 21-0041), RoHS-compliant lead-free finish, and 1.27mm pitch. Pins 1, 7, and 8 are internally connected and must remain unconnected on PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 2 (IN) | Positive supply input | Accepts 8V–36V unregulated input; internal regulation rejects >80dB ripple up to 1kHz when NR cap is used. |
| 3 (NR) | Noise reduction terminal | Connects to 1µF capacitor to reduce wideband noise; open-circuit if unused - no impact on DC specs. |
| 4 (GND) | Analog ground reference | Must be tied to clean low-impedance ground plane; separates reference return from power return to avoid PSRR degradation. |
| 5 (TRIM) | External voltage trim input | Accepts 0–5V adjustment signal; enables ±30mV (±0.6%) fine-tuning of VOUT without affecting tempco or long-term stability. |
| 6 (OUT) | Precision reference output | Delivers regulated 5.000V with <1Ω output impedance at DC–10kHz; stable with 0–100µF capacitive loads. |
Key Features
| Feature | Design Value |
|---|---|
| Buried-zener core | Enables 3.0µVP-P ultra-low flicker noise - essential for sub-16-bit noise floors in metrology-grade digitizers. |
| Trim-adjustable output | ±30mV range via external potentiometer - allows field calibration of system gain errors without redesigning reference circuitry. |
| Noise-reduction pin (NR) | 1µF capacitor reduces integrated noise by >50% in 0.1Hz–10kHz band - eliminates need for external LDO post-regulation. |
| Capacitive-load immunity | Stable with 0–100µF output capacitance - permits use of large local decoupling caps near high-current ADC drivers without oscillation. |
| High sink/source capability | ±15mA drive strength - directly biases multiple op-amp references or drives 12-bit DAC reference inputs without buffer amplifiers. |
Applications
| High-Resolution Data Acquisition | Digital Voltmeter (DVM) |
|---|---|
Use Scenario: 16-bit delta-sigma ADC measuring thermocouple or strain-gauge signals in industrial PLC modules. IC Role / Device Role / Timing Role: Primary voltage reference establishing absolute measurement scale for analog front-end. Use Value: 7ppm/°C tempco and 20ppm/1000h stability ensure <±0.005% reading error over 5-year field deployment without recalibration. |
Use Scenario: Portable handheld DVM requiring 5½-digit resolution and battery-powered operation. IC Role / Device Role / Timing Role: Precision 5.000V reference for dual-slope integrator and ADC reference ladder. Use Value: 3.0µVP-P low-frequency noise prevents digitization uncertainty in sub-microvolt measurements. |
| Automated Test Equipment (ATE) | Precision Current Source |
Use Scenario: Channel card in semiconductor ATE system generating calibrated stimulus voltages for DUT biasing. IC Role / Device Role / Timing Role: Master reference for programmable voltage sources with <10ppm line/load regulation. Use Value: ±15mA sourcing/sinking supports direct driving of 50Ω transmission lines and relay driver circuits without external buffers. |
Use Scenario: Programmable current source for LED calibration and photodiode transimpedance amplifier biasing. IC Role / Device Role / Timing Role: Stable reference for op-amp-based Howland current pump with feedback to OUT pin. Use Value: Trim-adjustable output enables precise 0–100mA current scaling via single external resistor, traceable to factory calibration. |
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, but requires ≥3.3V supply and has only 10mA output drive. | Better noise and tempco, but unsuitable for 8V–36V unregulated supplies or >10mA load conditions. | Select REF5050IDR only when supply is regulated ≥3.3V and load current ≤10mA; MAX6250BESA+ preferred for wide-input, high-drive industrial use. |
| ADR4550BRZ | 5.0V, 3ppm/°C max, 1.75µVP-P noise, SO-8, but limited to 10mA output and no NR pin for noise filtering. | Superior long-term stability (15ppm/1000h), but lacks noise-reduction flexibility and load drive for ATE channel cards. | Choose ADR4550BRZ for metrology lab standards where ultimate drift matters most; MAX6250BESA+ better for production test systems needing robustness and noise tailoring. |
Compared with REF5050IDR and ADR4550BRZ, MAX6250BESA+ uniquely combines wide 8V–36V input tolerance, ±15mA drive, and configurable noise reduction - making it the only option among the three qualified for unregulated supply environments with dynamic load demands.
Availability
MAX6250BESA+ is available at Aetrix Electronics and suitable for high-resolution data acquisition, digital voltmeter design, and automated test equipment requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX6250BESA+ 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) is a U.S.-based semiconductor company specializing in high-performance analog and mixed-signal ICs for precision, power, and interface applications.
The MAX62xx family was engineered specifically for metrology-grade voltage references - targeting 16-bit+ data converters, calibration equipment, and industrial control systems demanding lab-level accuracy in rugged environments.
FAQ
What is the maximum operating temperature range for MAX6250BESA+?
The MAX6250BESA+ is rated for continuous 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 parameters (including 7.0ppm/°C tempco and ±0.02% initial accuracy) are specified across this full span. The device remains stable and within spec under thermal cycling within these limits.
Does MAX6250BESA+ require an external capacitor on the NR pin?
No, the NR pin on MAX6250BESA+ is optional: it may be left open if wideband noise reduction is not required. When a 1µF capacitor is added between NR and GND, integrated 0.1Hz–10kHz noise drops significantly - but DC accuracy, tempco, and load regulation are unaffected whether the NR pin is used or not. The datasheet explicitly states "Leave open if not used."
Can MAX6250BESA+ drive a 10kΩ load while maintaining accuracy?
Yes. MAX6250BESA+ guarantees ±7ppm/mA load regulation for sourcing or sinking currents up to ±15mA. A 10kΩ load at 5V draws only 0.5mA - well within specification - resulting in <±0.0035% output deviation. The device's low 1Ω output impedance at DC further ensures minimal droop under such light loading.
Is MAX6250BESA+ pin-compatible with other MAX62xx variants in SO-8 package?
Yes. All MAX6225/MAX6241/MAX6250 variants in SO-8 package (e.g., MAX6250AESA+, MAX6241BESA+) share identical pinout per the Pin Configuration diagram and Pin Description table. Pins 2 (IN), 3 (NR), 4 (GND), 5 (TRIM), and 6 (OUT) perform identical functions across the family - enabling drop-in replacement when output voltage and tempco grades match design requirements.
What is the purpose of pins 1, 7, and 8 on MAX6250BESA+?
Pins 1, 7, and 8 on MAX6250BESA+ are labeled "I.C." (Internally Connected) in the Pin Description table and must remain unconnected on the PCB. These pins serve no external function - they are tied internally to substrate or guard rings and have no electrical role in reference operation. Connecting them risks compromising noise performance or thermal stability.
MAX6250BESA+ 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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 7ppm/°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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX6250BESA+ FAQ
1.How can I place an order for MAX6250BESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6250BESA+ 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 MAX6250BESA+ reliable?
The price and inventory of MAX6250BESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6250BESA+ is usually 5 days.
3.What payment methods are accepted for MAX6250BESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6250BESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6250BESA+?
MAX6250BESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6250BESA+ 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 MAX6250BESA+?
For technical support, including MAX6250BESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6250BESA+ requirements.
6.How does Aetrix verify that MAX6250BESA+ is sourced from the original manufacturer or authorized distributors?
All MAX6250BESA+ 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 MAX6250BESA+ meets industry standards.
7.What is the process for return or replacement of MAX6250BESA+?
All MAX6250BESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6250BESA+, 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 MAX6250BESA+ part is unused and in its original packaging.
Return procedure for MAX6250BESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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