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REF02AUE4 Equivalent & Substitute Parts
Part Overview
The REF02AUE4 is a series voltage reference IC manufactured by Texas Instruments, designed to provide a fixed 5V output with ±0.3% tolerance in an 8-SOIC surface mount package. This part is classified as obsolete, which necessitates identification of active equivalent and substitute components for new designs and production continuity. The REF02AUE4 operates across an input voltage range of 8V to 40V with a maximum output current of 21 mA, making it suitable for precision analog applications requiring stable reference voltages.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | REF02AUE4 |
| Category | Power Management (PMIC) |
| Output Voltage | 5V (Fixed) |
| Output Current | 21 mA |
| Tolerance | ±0.3% |
| Temperature Coefficient | 15 ppm/°C |
| Input Voltage Range | 8V ~ 40V |
| Supply Current | 1.4 mA |
| Operating Temperature | -40°C ~ 85°C |
| Package | 8-SOIC (0.154", 3.90mm Width) |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
| MSL Rating | 3 (168 Hours) |
Substitute Part Grouping Explanation
Substitution of the REF02AUE4 is determined by the following critical parameters:
Package Compatibility: All substitute parts must use the 8-SOIC (0.154", 3.90mm Width) surface mount package to ensure mechanical and electrical compatibility with existing PCB layouts.
Output Voltage: All candidates maintain the fixed 5V output specification, ensuring functional equivalence in voltage regulation applications.
Mounting Type: Surface mount technology is maintained across all substitutes for assembly process compatibility.
Electrical Performance Criteria: Substitutes are grouped by tolerance specification (±0.3%, ±0.1%, ±0.06%, ±1%), temperature coefficient, and output current capability. Parts with tighter tolerances and lower temperature coefficients represent enhanced performance alternatives.
Input Voltage Range: Substitutes operate within compatible input voltage windows. The REF02AUE4 accepts 8V to 40V; alternatives may have narrower ranges (7V to 36V or 8V to 30V) depending on the specific part.
Operating Temperature Range: The REF02AUE4 operates from -40°C to 85°C. Some substitutes extend this range to -40°C to 125°C, providing broader environmental compatibility.
Compliance & Status: Active product status is prioritized for long-term availability. RoHS3 compliance and REACH unaffected status are maintained across all substitutes.
Parameter Comparison
| Part Number | Manufacturer | Output Voltage | Output Current | Tolerance | Temp Coeff | Input Range | Supply Current | Temp Range | Package | Status | MSL |
|---|---|---|---|---|---|---|---|---|---|---|---|
| REF02AUE4 | Texas Instruments | 5V | 21 mA | ±0.3% | 15 ppm/°C | 8V ~ 40V | 1.4 mA | -40°C ~ 85°C | 8-SOIC | Obsolete | 3 |
| REF02AU | Texas Instruments | 5V | 21 mA | ±0.3% | 15 ppm/°C | 8V ~ 40V | 1.4 mA | -40°C ~ 85°C | 8-SOIC | Active | 3 |
| ADR02ARZ | Analog Devices Inc. | 5V | 10 mA | ±0.1% | 10 ppm/°C | 7V ~ 36V | 1 mA | -40°C ~ 125°C | 8-SOIC | Active | 1 |
| ADR02ARZ-REEL | Analog Devices Inc. | 5V | 10 mA | ±0.1% | 10 ppm/°C | 7V ~ 36V | 1 mA | -40°C ~ 125°C | 8-SOIC | Active | 1 |
| ADR02ARZ-REEL7 | Analog Devices Inc. | 5V | 10 mA | ±0.1% | 10 ppm/°C | 7V ~ 36V | 1 mA | -40°C ~ 125°C | 8-SOIC | Active | 1 |
| ADR02BRZ | Analog Devices Inc. | 5V | 10 mA | ±0.06% | 3 ppm/°C | 7V ~ 36V | 1 mA | -40°C ~ 125°C | 8-SOIC | Active | 1 |
| ADR02BRZ-REEL7 | Analog Devices Inc. | 5V | 10 mA | ±0.06% | 3 ppm/°C | 7V ~ 36V | 1 mA | -40°C ~ 125°C | 8-SOIC | Active | 1 |
| REF02CESA+ | Analog Devices Inc./Maxim Integrated | 5V | 21 mA | ±1% | 65 ppm/°C | 8V ~ 30V | 1.6 mA | -40°C ~ 85°C | 8-SOIC | Active | 1 |
| REF02CESA+T | Analog Devices Inc./Maxim Integrated | 5V | 21 mA | ±1% | 65 ppm/°C | 8V ~ 30V | 1.6 mA | -40°C ~ 85°C | 8-SOIC | Active | 1 |
| REF02CSA+ | Analog Devices Inc./Maxim Integrated | 5V | 21 mA | ±1% | 65 ppm/°C | 8V ~ 30V | 1.6 mA | 0°C ~ 70°C | 8-SOIC | Active | 1 |
| REF02CSA+T | Analog Devices Inc./Maxim Integrated | 5V | 21 mA | ±1% | 65 ppm/°C | 8V ~ 30V | 1.6 mA | 0°C ~ 70°C | 8-SOIC | Active | 1 |
Engineering Selection Recommendations
Direct Replacement (Identical Electrical Specifications): REF02AU is the primary direct replacement for REF02AUE4. Both parts are manufactured by Texas Instruments, share identical electrical specifications (5V output, ±0.3% tolerance, 21 mA output current, 15 ppm/°C temperature coefficient), and operate across the same input voltage range (8V to 40V) and temperature range (-40°C to 85°C). REF02AU maintains active product status with ROHS3 compliance and MSL-3 rating, ensuring continued availability and manufacturing support.
Enhanced Performance Alternatives (Tighter Tolerance): The ADR02ARZ, ADR02ARZ-REEL, and ADR02ARZ-REEL7 variants from Analog Devices Inc. provide ±0.1% tolerance with improved temperature coefficient (10 ppm/°C) and extended operating temperature range (-40°C to 125°C). These parts are suitable for applications requiring higher precision voltage references. Note that output current is reduced to 10 mA, which may limit applicability in high-current load scenarios. Input voltage range is narrower (7V to 36V). MSL-1 rating indicates superior moisture resistance.
Premium Precision Alternative (Highest Accuracy): ADR02BRZ and ADR02BRZ-REEL7 deliver the tightest tolerance specification (±0.06%) with the lowest temperature coefficient (3 ppm/°C) among all substitutes. These parts are appropriate for ultra-precision analog applications. The same current and temperature range limitations apply as the ADR02ARZ variants.
Lower Precision Alternatives (Relaxed Tolerance): REF02CESA+, REF02CESA+T, REF02CSA+, and REF02CSA+T from Analog Devices Inc./Maxim Integrated offer ±1% tolerance with 21 mA output current matching the original part. These are suitable for applications where tighter tolerance is not required. Input voltage range is restricted to 8V to 30V. MSL-1 rating provides improved moisture handling. Operating temperature range for REF02CSA+ and REF02CSA+T is limited to 0°C to 70°C, which may restrict use in extended temperature environments.
All substitute parts maintain RoHS3 compliance and REACH unaffected status, ensuring regulatory compatibility with current manufacturing standards.
Frequently Asked Questions (FAQ)
Q: Can REF02AU be used as a direct drop-in replacement for REF02AUE4? A: Yes. REF02AU is electrically and mechanically identical to REF02AUE4. Both parts feature 5V fixed output, ±0.3% tolerance, 21 mA output current, 8-SOIC package, and identical operating specifications. REF02AU is the active product continuation and is recommended for new designs.
Q: What is the difference between ADR02ARZ and ADR02BRZ? A: Both are Analog Devices Inc. parts in 8-SOIC packages with 5V output and 10 mA output current. ADR02ARZ provides ±0.1% tolerance with 10 ppm/°C temperature coefficient. ADR02BRZ offers tighter ±0.06% tolerance with superior 3 ppm/°C temperature coefficient. ADR02BRZ is the higher-precision option for applications requiring enhanced accuracy.
Q: Why do some ADR02 variants have reduced output current (10 mA vs. 21 mA)? A: The ADR02 series is designed for precision reference applications where lower output current is typical. Applications requiring 21 mA output current should use REF02AU or REF02CSA+ variants, which maintain the original 21 mA specification.
Q: What does the "-REEL" or "-REEL7" suffix indicate? A: These suffixes denote packaging format. "-REEL" and "-REEL7" indicate Cut Tape (CT) and Digi-Reel packaging, suitable for automated assembly processes. Parts without these suffixes are typically supplied in Tube packaging. Electrical specifications remain identical regardless of packaging format.
Q: Are all substitute parts RoHS3 compliant? A: Yes. All substitute parts listed maintain ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements for electronic component manufacturing.
Q: What is the significance of MSL (Moisture Sensitivity Level) ratings? A: MSL-3 (REF02AUE4 and REF02AU) requires storage at controlled humidity and has a 168-hour floor life after opening. MSL-1 (ADR02 and REF02CSA+ variants) indicates unlimited floor life and superior moisture resistance, providing greater handling flexibility in manufacturing environments.
Q: Can REF02CSA+ be used in applications requiring the full -40°C to 85°C temperature range? A: REF02CSA+ and REF02CSA+T are rated only to 0°C to 70°C. For applications requiring -40°C to 85°C operation, use REF02AU, REF02CESA+, or REF02CESA+T instead.
Q: What is the input voltage limitation for ADR02 parts? A: ADR02 variants (ADR02ARZ, ADR02BRZ) accept input voltage from 7V to 36V, compared to REF02AUE4's 8V to 40V range. Applications requiring operation above 36V input must use REF02AU or REF02CSA+ variants.
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