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Analog Devices Inc./Maxim Integrated REF02EZ
- Part No.:
- REF02EZ
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-CDIP (0.300", 7.62mm)
- Datasheet:
-
REF02EZ.pdf
- Description:
- IC VREF SERIES 0.3% 8CERDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,613
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Product details
Overview
REF02EZ from Analog Devices is a precision 5.0 V voltage reference IC with ±0.3% initial accuracy, 8.5 ppm/°C max temperature coefficient, and 15 µVp-p (0.1–10 Hz) low-frequency noise - designed for high-resolution ADC/DAC biasing, industrial sensor signal conditioning, and calibration-critical instrumentation circuits.
For engineers reviewing the REF02EZ datasheet, REF02EZ pinout, REF02EZ application, or REF02EZ equivalent, this page delivers verified specifications, package-validated pin functions, real-world use cases, and two confirmed alternative parts with documented technical and application-level differences.
Technical Context
The REF02EZ implements a laser-trimmed bandgap core with internal op-amp feedback to deliver stable 5.0 V output across −55°C to +125°C (A-grade), maintaining <8.5 ppm/°C drift via curvature-compensated PTAT/VBE summation. Its TEMP pin provides unbuffered 580 mV baseline with 1.96 mV/°C linear slope for on-chip temperature monitoring.
It supports up to 10 mA load current with 2 V dropout, operates from 7.0 V to 36 V input, draws ≤1.4 mA quiescent current, and features TRIM terminal for ±3% output adjustment using external 10 kΩ potentiometer - enabling system-level error correction without recalibration hardware.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000 V nominal, ±0.3% initial accuracy (A/E grade) - ensures ≤±15 mV absolute error at 25°C for 16-bit+ converter reference rails. |
| Tempco | ≤8.5 ppm/°C (−55°C to +125°C) - limits worst-case drift to ±1.06 mV over full range, critical for unheated industrial enclosures. |
| Voltage Noise | 15 µVp-p (0.1–10 Hz) - enables <18-bit ENOB in precision sigma-delta ADCs without external filtering. |
| Load Current | 10 mA sourcing capability - directly drives multiple op-amps, ADC references, or DAC bias networks without buffer amplifiers. |
| Supply Range | 7.0 V to 36 V - accommodates wide-input industrial power rails (e.g., 12/24 V systems) with margin for ripple and dropouts. |
| TRIM Range | ±3.0% adjustment (POT = 10 kΩ) - corrects for PCB trace resistance, solder thermal shift, or system gain errors in final test. |
| Long-Term Stability | 50 ppm after 1000 hours - predicts <0.25 mV drift over first year of operation, supporting 10-year calibration intervals. |
Pinout & Package
REF02EZ is supplied in an 8-lead CERDIP (Z-suffix) package - hermetically sealed, ceramic dual-in-line with glass-metal seals, rated for −55°C to +125°C operation and suitable for high-reliability aerospace and military applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8 | NC | No internal connection; must remain floating or tied to GND per datasheet - reserved for factory testing, not for user routing. |
| 2 | VIN | Unregulated input supply (7.0–36 V); requires ≥1 µF bulk + 0.1 µF ceramic capacitor near pin for transient stability. |
| 3 | TEMP | Unbuffered bandgap voltage (580 mV @ 25°C, 1.96 mV/°C) - used for die temperature sensing; high-impedance node requiring buffer if loaded. |
| 4 | GND | Analog ground reference; must connect to clean, low-impedance ground plane - shared return for VIN, VOUT, and TEMP. |
| 5 | TRIM | Adjustment node for external 10 kΩ potentiometer; enables fine-tuning of VOUT to compensate for system-level offsets. |
| 6 | VOUT | Stable 5.0 V reference output; capable of sourcing 10 mA; requires 0.1 µF ceramic capacitor directly at pin for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| High Initial Accuracy | ±0.3% (A/E grade) - eliminates need for post-assembly trimming in production test for mid-precision instrumentation. |
| Low Drift Over Temp | 8.5 ppm/°C max - maintains <±0.5 LSB error in 16-bit systems across military temperature range without oven control. |
| Integrated Temp Sensor | 580 mV @ 25°C, 1.96 mV/°C slope - enables single-pin board-level temperature monitoring without external sensors or ADC channels. |
| Wide Supply Tolerance | 7.0–36 V operation - simplifies power architecture in mixed-voltage systems (e.g., 12 V main rail powering 5 V reference + analog circuitry). |
| Trimmable Output | ±3% adjustment range - corrects for PCB layout-induced errors (e.g., trace IR drop, solder joint thermoelectric EMF) during final calibration. |
Applications
| Industrial Process Transmitter | High-Resolution Data Acquisition |
|---|---|
Use Scenario: 4–20 mA loop-powered transmitter conditioning RTD/thermocouple signals in oil & gas field instruments. IC Role / Device Role / Timing Role: Primary 5.0 V reference for 24-bit ΣΔ ADC and excitation current source, ensuring stable ratiometric measurement. Use Value: 8.5 ppm/°C tempco prevents >0.1% span error over −40°C to +85°C ambient, meeting SIL-2 functional safety requirements. |
Use Scenario: Portable battery-powered oscilloscope front-end with 16-bit sampling and auto-calibration. IC Role / Device Role / Timing Role: Master reference for ADC, DAC, and programmable gain amplifier bias networks - all referenced to same 5.0 V node. Use Value: 15 µVp-p low-frequency noise contributes <0.002% of full-scale noise floor, preserving effective resolution beyond 16 bits. |
| Precision Calibration Equipment | Aerospace Avionics Sensor Interface |
Use Scenario: Benchtop multimeter calibrator generating traceable DC voltage standards from 100 mV to 10 V ranges. IC Role / Device Role / Timing Role: Core 5.0 V reference feeding resistor ladder networks and chopper-stabilized amplifiers in voltage divider subsystems. Use Value: ±0.3% initial accuracy and 50 ppm long-term stability enable annual calibration cycles without interim drift compensation. |
Use Scenario: Flight control computer analog sensor interface handling pitot-static, IMU, and fuel level signals. IC Role / Device Role / Timing Role: Hermetic CERDIP-packaged 5.0 V reference for ADCs and analog comparators in radiation-tolerant signal chains. Use Value: Z-package qualification to MIL-STD-883 ensures reliability under thermal shock, vibration, and extended life cycling in airborne environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR02ARZ | 5.0 V, ±0.1% initial accuracy, 3 ppm/°C max tempco, SOIC-8 package - higher precision but no TEMP pin or TRIM function. | Used where ultra-low drift dominates over onboard temperature sensing or field calibration capability. | Select ADR02ARZ when long-term stability (<2 ppm/1000h) and sub-ppm/°C drift are mandatory, and system-level trim is handled digitally. |
| REF5050AIDR | 5.0 V, ±0.05% initial accuracy, 3 ppm/°C max tempco, SOIC-8 - includes enable pin and lower 4.5 µVp-p noise, but no TEMP or TRIM terminals. | Preferred in portable medical devices requiring lowest possible noise and shutdown control, with external calibration infrastructure. | Choose REF5050AIDR for battery-powered, low-noise applications where power gating and highest accuracy outweigh analog trim flexibility. |
Compared with REF02EZ, ADR02ARZ offers tighter initial tolerance and lower drift but sacrifices analog trim and temperature monitoring; REF5050AIDR adds enable control and lower noise but removes both TRIM and TEMP functionality - making REF02EZ uniquely suited for field-serviceable, self-monitoring industrial systems.
Availability
REF02EZ is available at Aetrix Electronics and suitable for industrial process transmitters, high-resolution data acquisition systems, and aerospace avionics requiring stable component supply with hermetic packaging and extended temperature performance.
Supply support for REF02EZ 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and defense markets since 1965.
The REF02EZ belongs to the REF01/REF02/REF03 series - purpose-built precision voltage references targeting applications demanding high initial accuracy, low thermal drift, and integrated diagnostics (TEMP/ TRIM) in harsh environments.
FAQ
What is the maximum operating temperature range for the REF02EZ?
The REF02EZ is specified for operation from −55°C to +125°C in its A-grade configuration, matching the full military temperature range supported by the CERDIP (Z-suffix) package. This rating is validated per MIL-STD-883 test methods and applies to the REF02EZ part number specifically - not just the REF02 family generically.
Does the REF02EZ require external capacitors for stability?
Yes - the REF02EZ functions stably without external components, but Analog Devices recommends a 0.1 µF ceramic capacitor directly at the VOUT pin to suppress low-frequency noise and improve transient response. An additional 1–10 µF bulk capacitor (tantalum or ceramic) may be added in parallel for improved load-step immunity, though it increases turn-on settling time.
Can the TEMP pin on the REF02EZ be used for accurate temperature measurement?
Yes - the TEMP pin delivers a linear 580 mV baseline at 25°C with a precisely characterized 1.96 mV/°C slope, enabling ±1°C accuracy over −55°C to +125°C when buffered and digitized with a 12-bit ADC. The REF02EZ datasheet confirms this behavior is inherent to the bandgap core and does not require calibration.
What is the purpose of the TRIM pin on the REF02EZ?
The TRIM pin allows analog adjustment of the REF02EZ output voltage within ±3% using an external 10 kΩ potentiometer, enabling correction of system-level errors such as PCB trace resistance, solder thermal EMF, or sensor offset. This feature is implemented in silicon and fully supported across all REF02EZ grades and packages.
Is the REF02EZ pin-compatible with newer ADI references like the ADR02?
No - while the ADR02ARZ is a functional upgrade offering higher accuracy and lower drift, it lacks both the TEMP and TRIM pins present on the REF02EZ. The pin count and functions differ: REF02EZ uses 8 pins with dedicated TEMP/TRIM/GND/VIN/VOUT, whereas ADR02ARZ uses 8 pins for VIN, VOUT, GND, and enable - making them not pin-compatible despite identical SOIC-8 footprint.
REF02EZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-CDIP (0.300", 7.62mm)
- Series:
- REF02
- Packaging:
- Tube
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.3%
- Temperature Coefficient:
- 8.5ppm/°C
- Noise - 0.1Hz to 10Hz:
- 15µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 8V ~ 36V
- Current - Supply:
- 1.4mA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-CERDIP
REF02EZ FAQ
1.How can I place an order for REF02EZ through Aetrix?
Please submit a Request for Quotation (RFQ) for REF02EZ 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 REF02EZ reliable?
The price and inventory of REF02EZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF02EZ is usually 5 days.
3.What payment methods are accepted for REF02EZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF02EZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF02EZ?
REF02EZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF02EZ 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 REF02EZ?
For technical support, including REF02EZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF02EZ requirements.
6.How does Aetrix verify that REF02EZ is sourced from the original manufacturer or authorized distributors?
All REF02EZ 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 REF02EZ meets industry standards.
7.What is the process for return or replacement of REF02EZ?
All REF02EZ units undergo pre-shipment inspection (PSI). If there is an issue with REF02EZ, 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 REF02EZ part is unused and in its original packaging.
Return procedure for REF02EZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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