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Analog Devices Inc./Maxim Integrated MAX6250AESA
- Part No.:
- MAX6250AESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6250AESA.pdf
- Description:
- IC VREF SERIES 0.02% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,689
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Product details
Overview
MAX6250AESA from Maxim Integrated is a precision 5.000V buried-zener voltage reference IC with 1.5ppm/°C max temperature coefficient (−40°C to +85°C), ±0.02% initial accuracy, and 3.0µVP-P (0.1Hz–10Hz) output noise. It delivers ±15mA sourcing/sinking capability, supports external trimming and noise reduction, and is optimized for high-resolution data converters requiring stable, low-drift references.
For engineers reviewing the MAX6250AESA datasheet, MAX6250AESA pinout, MAX6250AESA application, or MAX6250AESA equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation insights, and two confirmed alternative parts with documented functional trade-offs.
Technical Context
The MAX6250AESA uses buried-zener core technology with on-chip temperature compensation to achieve laboratory-grade stability without heater power. Its trim input enables ±30mV adjustment (±0.6%) without degrading temperature coefficient or long-term drift.
It features low 20ppm/1000h long-term stability, stable operation with 0–100µF capacitive loads, and excellent transient response (<10µs settling to ±0.01%). Noise reduction is implemented via an external 1µF capacitor on the NR pin, reducing wideband noise while preserving DC accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±1mV at +25°C - ensures direct compatibility with 5V ADC/DAC full-scale ranges without calibration. |
| Temp Coefficient | ≤1.5ppm/°C (−40°C to +85°C) - limits drift to ≤0.75mV over full industrial range, critical for <16-bit system accuracy. |
| Initial Accuracy | ±0.02% (±1mV) - eliminates need for post-assembly trimming in high-volume precision instrumentation. |
| Output Noise | 3.0µVP-P (0.1Hz–10Hz) - preserves SNR in 16-bit+ data acquisition systems where 1LSB = 76µV (5V/65536). |
| Load Regulation | ≤6ppm/mA sourcing - maintains <0.03mV error per mA load change, enabling direct drive of op-amp inputs and DAC references. |
| Supply Current | 2.0–3.3mA - enables low-power operation in battery-backed or energy-constrained measurement nodes. |
| Long-Term Stability | 20ppm/1000h - predicts <0.01% drift over 1 year, supporting 10-year calibration intervals in metrology equipment. |
Pinout & Package
MAX6250AESA is housed in an 8-pin SO (Small Outline) package, RoHS-compliant, with 1.27mm pitch and standard JEDEC MO-153 footprint (S8+5 outline, land pattern 90-0096).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8 | I.C. (Internally Connected) | No connection required; pins are internally bonded but not functional - must remain unconnected on PCB. |
| 2 | IN | Positive supply input (8V–36V); requires local 1µF bypass to GND for ripple rejection >60dB above 10Hz. |
| 3 | NR | Noise reduction node; connect 1µF capacitor to GND to reduce wideband noise by up to 50% without affecting DC performance. |
| 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%) using 10kΩ potentiometer between OUT and GND. |
| 6 | OUT | Stable 5.000V reference output; capable of sourcing/sinking ±15mA with <10µs transient recovery to ±0.01%. |
Key Features
| Feature | Design Value |
|---|---|
| Buried-zener core | Enables 3.0µVP-P low-frequency noise and 1.5ppm/°C tempco - outperforms bandgap references in metrology-grade applications. |
| External trim capability | ±30mV adjustment range (±0.6%) with no impact on tempco or long-term drift - supports field calibration without hardware redesign. |
| Noise-reduction pin (NR) | 1µF capacitor reduces 10Hz–1kHz noise by >30% while maintaining DC accuracy - eliminates need for external filtering stages. |
| Capacitive-load immunity | Stable with 0–100µF output capacitance - allows direct use with large decoupling caps on ADC reference inputs without oscillation risk. |
| High sink/source current | ±15mA drive strength - enables direct interface to multiple op-amps, DAC reference buffers, or analog switches without external gain stages. |
Applications
| High-Resolution Data Acquisition | Digital Voltmeter (DVM) |
|---|---|
Use Scenario: 16-bit SAR ADC in portable multimeter measuring 0–5V input range with <0.01% total error budget. IC Role / Device Role / Timing Role: Primary voltage reference supplying precise 5.000V full-scale reference to ADC's REF pin. Use Value: 1.5ppm/°C tempco and 3.0µVP-P noise ensure <1 LSB error across temperature and time, meeting Class A DVM accuracy standards. | Use Scenario: Benchtop 6½-digit DVM requiring stable reference for autoranging and auto-zero cycles. IC Role / Device Role / Timing Role: Master reference for internal DAC-based nulling circuit and external measurement front-end. Use Value: 20ppm/1000h long-term stability and ±0.02% initial accuracy eliminate annual recalibration, reducing maintenance cost and downtime. |
| ATE Equipment Reference | Precision Current Source |
Use Scenario: Automated test system generating calibrated 0–10V analog stimulus for IC parametric testing. IC Role / Device Role / Timing Role: Reference for programmable voltage source amplifier driving DUT bias rails. Use Value: ±15mA output drive and <10µs transient response enable fast settling during voltage step changes, increasing test throughput by >15%. | Use Scenario: 4–20mA loop transmitter with HART modulation requiring ultra-stable current setpoint. IC Role / Device Role / Timing Role: Reference for op-amp-based Howland current source controlling MOSFET gate voltage. Use Value: Load regulation ≤6ppm/mA ensures <0.001% current error despite sensor cable resistance variations up to 1kΩ. |
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 output, 3ppm/°C max tempco (−40°C to +125°C), 4.5µVP-P noise, 10mA max output. | Higher tempco and noise; wider operating temperature range; lower drive capability. | Preferred for automotive under-hood use where extended temp range outweighs noise/tempco penalties. |
| ADR4550BRZ | 5.0V output, 1ppm/°C max tempco (−40°C to +125°C), 2.75µVP-P noise, ±10mA output, higher supply current (4.5mA). | Lower tempco and noise than MAX6250AESA, but reduced output drive and higher quiescent power. | Selected when ultimate stability (<1ppm/°C) is mandatory and load current ≤10mA. |
Compared with REF5050IDR and ADR4550BRZ, MAX6250AESA offers superior noise performance (3.0µVP-P) and higher output drive (±15mA) at lower quiescent current, making it optimal for industrial data acquisition where load flexibility and low-noise precision coexist.
Availability
MAX6250AESA is available at Aetrix Electronics and suitable for high-resolution analog-to-digital conversion, digital voltmeter design, and automated test equipment requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6250AESA 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, emphasizing ultra-low drift, low noise, and robustness in industrial and test equipment where calibration integrity is non-negotiable.
FAQ
What is the maximum operating temperature range for MAX6250AESA?
The MAX6250AESA is rated for −40°C to +85°C operation, matching the 'E' grade temperature specification. This range is validated across all electrical parameters including tempco (≤1.5ppm/°C), initial accuracy (±0.02%), and long-term stability (20ppm/1000h). Operation outside this range may cause parametric shift or reliability degradation; the device is not characterized for extended temperatures.
Can MAX6250AESA drive a 10kΩ load directly without buffer amplification?
Yes, MAX6250AESA can directly drive a 10kΩ load: at 5V output, this draws only 0.5mA - well within its ±15mA sourcing/sinking capability. Load regulation is specified at ≤6ppm/mA, so the resulting error is <3ppm (0.015mV), negligible for 16-bit systems. No buffer is needed unless dynamic load transients exceed ±15mA or require sub-microsecond settling.
Does MAX6250AESA require an external capacitor on the NR pin for basic operation?
No, MAX6250AESA operates fully functional with the NR pin left open. The 1µF capacitor is optional and used only to reduce wideband noise (10Hz–1kHz) by up to 50%; it does not affect DC accuracy, tempco, or stability. Omitting the capacitor simplifies layout and reduces BOM count when noise requirements permit.
What is the purpose of pins 1, 7, and 8 on MAX6250AESA?
Pins 1, 7, and 8 are labeled I.C. (Internally Connected) - they are bonded inside the die but serve no external function. These pins must remain unconnected on the PCB; routing traces or applying solder to them risks shorting internal structures or compromising thermal performance. Their presence is due to package pinout standardization, not circuit functionality.
How does the TRIM pin on MAX6250AESA affect long-term stability?
The TRIM pin on MAX6250AESA allows ±30mV output adjustment via external resistor network, and crucially, Maxim's datasheet confirms this external trimming "does not affect temperature stability" or long-term drift. Therefore, MAX6250AESA retains its 20ppm/1000h stability and 1.5ppm/°C tempco even when trimmed - enabling field calibration without sacrificing lifetime accuracy.
MAX6250AESA 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:
- 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:
- 3ppm/°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
MAX6250AESA FAQ
1.How can I place an order for MAX6250AESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6250AESA 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 MAX6250AESA reliable?
The price and inventory of MAX6250AESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6250AESA is usually 5 days.
3.What payment methods are accepted for MAX6250AESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6250AESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6250AESA?
MAX6250AESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6250AESA 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 MAX6250AESA?
For technical support, including MAX6250AESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6250AESA requirements.
6.How does Aetrix verify that MAX6250AESA is sourced from the original manufacturer or authorized distributors?
All MAX6250AESA 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 MAX6250AESA meets industry standards.
7.What is the process for return or replacement of MAX6250AESA?
All MAX6250AESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX6250AESA, 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 MAX6250AESA part is unused and in its original packaging.
Return procedure for MAX6250AESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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