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Analog Devices Inc. REF02EJ8
- Part No.:
- REF02EJ8
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-CDIP (0.300", 7.62mm)
- Datasheet:
-
REF02EJ8.pdf
- Description:
- IC VREF SERIES 5V 8CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,461
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Product details
Overview
REF02EJ8 from Analog Devices (formerly Linear Technology) is a precision 5V bandgap voltage reference with integrated temperature-sensing output, housed in an 8-lead CERDIP package. It delivers ±0.3% initial accuracy, 5ppm/°C typical temperature coefficient over 0°C to 70°C, and 10µVP-P (0.1Hz–10Hz) output noise - enabling high-stability bridge excitation and precision DAC/ADC biasing in industrial instrumentation.
For engineers reviewing the REF02EJ8 datasheet, REF02EJ8 pinout, REF02EJ8 application, or REF02EJ8 equivalent, key selection criteria include its guaranteed 8.5ppm/°C max TC over full 0°C–70°C range, dedicated TEMP pin delivering 620mV at 25°C with 2.1mV/°C slope, and ability to source/sink up to ±10mA load current while maintaining low drift under varying line and load conditions.
Technical Context
The REF02EJ8 implements a trimmed bandgap core with internal curvature compensation, supporting both fixed 5V output and external trimming via the TRIM pin (±3% adjustment range with 10kΩ pot). Its TEMP pin provides a linear analog voltage proportional to absolute temperature (620mV @ 25°C, 2.1mV/°C), exclusively available on REF-02 variants and unconnected on REF-01.
It operates from 7V to 40V input, exhibits 0.0001%/V line regulation and 0.0005%/mA load regulation (0–10mA), and draws only 0.65–1.4mA quiescent current - making it suitable for low-power, high-accuracy systems where thermal stability and supply rejection are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V nominal, ±0.3% initial accuracy (4.985–5.015V) - ensures minimal calibration burden in 12-bit+ data converters. |
| Tempco (0°C–70°C) | 8.5ppm/°C max (0.00085%/°C) - guarantees ≤0.06% total output drift across commercial temperature range. |
| Output Noise (0.1–10Hz) | 10µVP-P typical - supports sub-16-bit resolution in precision measurement front-ends without added filtering. |
| Line Regulation | 0.0001%/V typical - maintains output stability despite ±10% input rail variation in unregulated supplies. |
| Load Regulation | 0.0005%/mA typical (0–10mA) - enables direct driving of op-amp inputs or ADC references without buffering. |
| TEMP Pin Output | 620mV @ 25°C, 2.1mV/°C slope - provides calibrated Kelvin-scaled temperature sensing without external signal conditioning. |
| Quiescent Current | 0.65–1.4mA - allows use in battery-backed or energy-constrained systems with predictable power budget. |
Pinout & Package
REF02EJ8 is supplied in an 8-lead hermetic CERDIP (J8) package (0.300" wide, narrow body), rated for 0°C to 70°C operation. The package features glass-sealed ceramic construction for long-term stability and moisture resistance in harsh environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Internally unused; must remain floating - no external connection permitted. |
| 2 (INPUT) | Voltage Reference Input | Accepts 7–40V unregulated supply; internal regulator establishes stable core bias. |
| 3 (TEMP) | Temperature Sensor Output | Provides 620mV @ 25°C, 2.1mV/°C linear output - used for on-board thermal monitoring or compensation. |
| 4 (GND) | Analog Ground | Reference return path; must be tied to clean system ground plane to minimize noise coupling. |
| 5 (NC) | No Connect | Internally unused; must remain floating - no external connection permitted. |
| 6 (NC) | No Connect | Internally unused; must remain floating - no external connection permitted. |
| 7 (OUTPUT) | Precision 5V Output | Stable 5.000V reference output; capable of sourcing/sinking ±10mA with minimal regulation error. |
| 8 (TRIM) | Output Adjustment Terminal | Allows ±3% fine-tuning of output voltage using external 10kΩ potentiometer - enables system-level calibration. |
Key Features
| Feature | Design Value |
|---|---|
| Dedicated temperature-sensing output | 620mV @ 25°C with 2.1mV/°C slope - eliminates need for separate temperature sensor and signal conditioning circuitry. |
| Low-drift bandgap core | 8.5ppm/°C max tempco over 0°C–70°C - ensures <0.06% total output variation in commercial-grade instrumentation. |
| Integrated output trim capability | ±3% adjustment range via TRIM pin with 10kΩ pot - enables end-of-line calibration without component replacement. |
| High line and load regulation | 0.0001%/V and 0.0005%/mA - maintains accuracy across wide input voltage swings and dynamic load changes. |
| Hermetic CERDIP packaging | J8 package with glass-sealed ceramic body - provides superior long-term stability and humidity resistance vs. plastic DIP. |
Applications
| Strain Gauge Bridge Excitation | Precision ADC/DAC Reference |
|---|---|
Use Scenario: Exciting Wheatstone bridges in load cells and pressure transducers with matched, low-noise excitation voltage. IC Role / Device Role / Timing Role: Provides stable 5V excitation source and temperature-compensation signal (via TEMP pin) for ratiometric measurements. Use Value: Enables <0.01% nonlinearity error by eliminating excitation drift; TEMP pin allows real-time thermal correction of bridge offset. | Use Scenario: Supplying reference voltage to 16-bit SAR or sigma-delta ADCs in data acquisition modules. IC Role / Device Role / Timing Role: Serves as primary voltage reference for analog-to-digital conversion, with TEMP pin used for ambient temperature logging. Use Value: 10µVP-P noise and 8.5ppm/°C drift ensure ≥16-bit effective resolution without oversampling or external filtering. |
| Industrial Precision Regulator | Constant Current Source Bias |
Use Scenario: Generating ultra-stable 5V supply rails for op-amps and sensors in PLC analog I/O modules. IC Role / Device Role / Timing Role: Acts as error amplifier reference in discrete shunt or series regulator topologies. Use Value: Low 1.4mA quiescent current and high PSRR allow integration into low-power regulated supplies without thermal penalty. | Use Scenario: Setting precise bias current for LED drivers, laser diodes, or sensor excitation circuits. IC Role / Device Role / Timing Role: Supplies reference voltage to current-sense amplifier or op-amp feedback network controlling MOSFET gate. Use Value: ±0.3% initial accuracy and 0.0005%/mA load regulation ensure <0.1% current setting error across full load range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1019CN8#PBF | 0.05% initial accuracy, 5ppm/°C max tempco, pin-compatible 8-lead PDIP - tighter specs but higher cost and no TEMP pin. | Lacks integrated temperature output; requires external sensor for thermal compensation. | Select when highest initial accuracy and lowest drift are mandatory, and temperature sensing is handled separately. |
| REF02EH#PBF | Same electrical specs, but in 8-lead TO-5 metal can package - wider –55°C to 125°C operating range and superior thermal conductivity. | Supports extended temperature operation and better heat dissipation in high-power or automotive environments. | Select when operation beyond 70°C is required or when hermetic metal packaging is mandated for reliability. |
Compared with LT1019CN8#PBF and REF02EH#PBF, REF02EJ8 uniquely balances commercial-grade accuracy, integrated temperature sensing, and hermetic CERDIP reliability - making it optimal for cost-sensitive, thermally compensated industrial instrumentation where 0°C–70°C range suffices.
Availability
REF02EJ8 is available at Aetrix Electronics and suitable for precision ADC/DAC reference, strain gauge bridge excitation, and industrial regulator applications requiring stable component supply with traceable sourcing and long-term lifecycle support.
Supply support for REF02EJ8 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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The REF-01/REF-02 family was designed specifically for precision instrumentation requiring stable, low-drift voltage references with optional integrated temperature sensing - targeting industrial, test & measurement, and medical equipment.
FAQ
What is the operating temperature range specified for REF02EJ8?
The REF02EJ8 is rated for 0°C to 70°C operation, as confirmed by its "E" grade suffix and J8 package ordering information. This range is guaranteed for all electrical specifications including 8.5ppm/°C maximum temperature coefficient and ±0.3% output voltage accuracy. Operation outside this range is not characterized and may result in parametric deviation.
Does REF02EJ8 provide a temperature output, and how is it used?
Yes, REF02EJ8 provides a dedicated temperature-sensing output on Pin 3 (TEMP), delivering 620mV at 25°C with a linear 2.1mV/°C slope. This output is usable for real-time board temperature monitoring or ratiometric compensation in bridge circuits. Current into or out of the TEMP pin must be limited to ±50nA, and capacitance must not exceed 30pF to maintain accuracy.
Can REF02EJ8 be used as a drop-in replacement for REF02EN8#PBF?
No - REF02EJ8 and REF02EN8#PBF share identical electrical specifications and pinout but differ in package type (hermetic CERDIP vs. plastic DIP) and mechanical compatibility. While functionally interchangeable in most circuits, REF02EJ8 offers superior long-term stability and moisture resistance due to its glass-sealed ceramic construction, making it preferred for high-reliability applications.
What is the maximum load current REF02EJ8 can source or sink while maintaining specification?
REF02EJ8 is specified to source or sink up to ±10mA while maintaining its published load regulation of 0.0005%/mA and output voltage accuracy. At ±10mA, output deviation remains within ±0.005% of nominal 5V. Exceeding this current may degrade regulation performance and increase self-heating effects, impacting temperature coefficient accuracy.
Is there a recommended external circuit for trimming the output voltage of REF02EJ8?
Yes - the TRIM pin (Pin 8) supports ±3% output adjustment using a 10kΩ potentiometer connected between OUTPUT and GND, with the wiper tied to TRIM. This configuration allows precise end-of-line calibration to compensate for system-level gain errors. Trimming does not affect the TEMP pin output or temperature coefficient, which remains stable at 2.1mV/°C.
REF02EJ8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-CDIP (0.300", 7.62mm)
- Series:
- REF02
- Packaging:
- Tube
- Product Status:
- Obsolete
- Reference Type:
- Series
- Output Type:
- -
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Tolerance:
- ±0.3%
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-CERDIP
REF02EJ8 FAQ
1.How can I place an order for REF02EJ8 through Aetrix?
Please submit a Request for Quotation (RFQ) for REF02EJ8 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 REF02EJ8 reliable?
The price and inventory of REF02EJ8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF02EJ8 is usually 5 days.
3.What payment methods are accepted for REF02EJ8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF02EJ8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF02EJ8?
REF02EJ8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF02EJ8 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 REF02EJ8?
For technical support, including REF02EJ8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF02EJ8 requirements.
6.How does Aetrix verify that REF02EJ8 is sourced from the original manufacturer or authorized distributors?
All REF02EJ8 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 REF02EJ8 meets industry standards.
7.What is the process for return or replacement of REF02EJ8?
All REF02EJ8 units undergo pre-shipment inspection (PSI). If there is an issue with REF02EJ8, 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 REF02EJ8 part is unused and in its original packaging.
Return procedure for REF02EJ8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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