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REF02AUG4 Equivalent & Substitute Parts
Part Overview
The REF02AUG4 is a series voltage reference IC manufactured by Texas Instruments, delivering a fixed 5V output with ±0.3% tolerance in an 8-SOIC surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The REF02AUG4 operates across an input voltage range of 8V to 40V with a maximum output current of 21 mA, suitable for precision analog applications requiring stable reference voltages.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | REF02AUG4 |
| Product Status | Obsolete |
| 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) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution for the REF02AUG4 is determined by the following critical parameters: fixed 5V output voltage, 8-SOIC package compatibility, surface mount mounting type, and ROHS3 compliance. Substitute parts must maintain the same output voltage and package form factor to ensure direct replacement capability.
The substitute parts are grouped into two categories:
Category 1: Texas Instruments REF02 Series (Direct Lineage)
- REF02AU: Active product status, identical electrical specifications to REF02AUG4
- REF02CSA+, REF02CSA+T, REF02CESA+, REF02CESA+T: REF02 base series with relaxed tolerance specifications (±1% vs ±0.3%)
Category 2: Analog Devices ADR02 Series (Cross-Manufacturer Alternative)
- ADR02ARZ, ADR02ARZ-REEL, ADR02ARZ-REEL7: ±0.1% tolerance, improved specifications
- ADR02BRZ, ADR02BRZ-REEL7: ±0.06% tolerance, superior performance grade
All substitute parts share the 8-SOIC package, 5V fixed output, surface mount capability, and ROHS3 compliance. Packaging variants (Tube, Cut Tape & Digi-Reel, Tape & Reel) differ only in delivery format and do not affect electrical performance.
Parameter Comparison
| Part Number | Manufacturer | Status | Output Voltage | Output Current | Tolerance | Temp Coeff | Input Range | Supply Current | Temp Range | Package |
|---|---|---|---|---|---|---|---|---|---|---|
| REF02AUG4 | Texas Instruments | Obsolete | 5V | 21 mA | ±0.3% | 15 ppm/°C | 8V ~ 40V | 1.4 mA | -40°C ~ 85°C | 8-SOIC |
| REF02AU | Texas Instruments | Active | 5V | 21 mA | ±0.3% | 15 ppm/°C | 8V ~ 40V | 1.4 mA | -40°C ~ 85°C | 8-SOIC |
| ADR02ARZ | Analog Devices Inc. | Active | 5V | 10 mA | ±0.1% | 10 ppm/°C | 7V ~ 36V | 1 mA | -40°C ~ 125°C | 8-SOIC |
| ADR02ARZ-REEL | Analog Devices Inc. | Active | 5V | 10 mA | ±0.1% | 10 ppm/°C | 7V ~ 36V | 1 mA | -40°C ~ 125°C | 8-SOIC |
| ADR02ARZ-REEL7 | Analog Devices Inc. | Active | 5V | 10 mA | ±0.1% | 10 ppm/°C | 7V ~ 36V | 1 mA | -40°C ~ 125°C | 8-SOIC |
| ADR02BRZ | Analog Devices Inc. | Active | 5V | 10 mA | ±0.06% | 3 ppm/°C | 7V ~ 36V | 1 mA | -40°C ~ 125°C | 8-SOIC |
| ADR02BRZ-REEL7 | Analog Devices Inc. | Active | 5V | 10 mA | ±0.06% | 3 ppm/°C | 7V ~ 36V | 1 mA | -40°C ~ 125°C | 8-SOIC |
| REF02CSA+ | Analog Devices Inc./Maxim Integrated | Active | 5V | 21 mA | ±1% | 65 ppm/°C | 8V ~ 30V | 1.6 mA | 0°C ~ 70°C | 8-SOIC |
| REF02CSA+T | Analog Devices Inc./Maxim Integrated | Active | 5V | 21 mA | ±1% | 65 ppm/°C | 8V ~ 30V | 1.6 mA | 0°C ~ 70°C | 8-SOIC |
| REF02CESA+ | Analog Devices Inc./Maxim Integrated | Active | 5V | 21 mA | ±1% | 65 ppm/°C | 8V ~ 30V | 1.6 mA | -40°C ~ 85°C | 8-SOIC |
| REF02CESA+T | Analog Devices Inc./Maxim Integrated | Active | 5V | 21 mA | ±1% | 65 ppm/°C | 8V ~ 30V | 1.6 mA | -40°C ~ 85°C | 8-SOIC |
Engineering Selection Recommendations
Primary Substitute: REF02AU
REF02AU is the recommended direct replacement for REF02AUG4. Both parts are from the Texas Instruments REF02 series with identical electrical specifications: 5V fixed output, ±0.3% tolerance, 21 mA output current, and -40°C to 85°C operating range. REF02AU carries active product status, ensuring long-term availability and supply chain continuity. The 8-SOIC package and surface mount configuration are identical, enabling direct PCB compatibility without layout modifications.
Secondary Substitutes: ADR02 Series (Analog Devices)
The ADR02ARZ, ADR02ARZ-REEL, and ADR02ARZ-REEL7 variants offer improved specifications with ±0.1% tolerance and extended operating temperature range (-40°C to 125°C). These parts are suitable when enhanced accuracy is required. The ADR02BRZ and ADR02BRZ-REEL7 variants provide the highest precision grade at ±0.06% tolerance with 3 ppm/°C temperature coefficient, appropriate for demanding precision applications.
Note: ADR02 series parts specify 10 mA maximum output current versus 21 mA for REF02AUG4. Design verification is required if the application demands output currents exceeding 10 mA.
Tertiary Substitutes: REF02 Series with Relaxed Tolerance
REF02CSA+, REF02CSA+T, REF02CESA+, and REF02CESA+T maintain the 21 mA output current capability but with ±1% tolerance specification. These parts are suitable for applications where the ±0.3% tolerance of REF02AUG4 is not critical. Operating temperature ranges vary: REF02CSA+ and REF02CSA+T operate 0°C to 70°C, while REF02CESA+ and REF02CESA+T operate -40°C to 85°C. Input voltage range is reduced to 8V to 30V compared to REF02AUG4's 8V to 40V specification.
All substitute parts maintain ROHS3 compliance and 8-SOIC package compatibility.
Frequently Asked Questions (FAQ)
Q: Can REF02AU be used as a direct drop-in replacement for REF02AUG4?
A: Yes. REF02AU is electrically and mechanically identical to REF02AUG4 with the same 5V output, ±0.3% tolerance, 21 mA output current, and 8-SOIC package. The primary difference is product status: REF02AUG4 is obsolete while REF02AU is active, ensuring continued availability.
Q: What is the difference between ADR02ARZ and ADR02BRZ?
A: Both are Analog Devices 5V reference ICs in 8-SOIC packages. ADR02ARZ provides ±0.1% tolerance with 10 ppm/°C temperature coefficient. ADR02BRZ offers superior performance with ±0.06% tolerance and 3 ppm/°C temperature coefficient. Selection depends on accuracy requirements; ADR02BRZ is preferred for precision applications.
Q: Why do ADR02 parts specify 10 mA output current while REF02AUG4 specifies 21 mA?
A: The ADR02 and REF02 series are designed with different output stage architectures. If the application requires output currents between 10 mA and 21 mA, REF02AU or REF02 series substitutes must be used. ADR02 parts are not suitable for such applications.
Q: What is the significance of packaging variants like REEL, REEL7, and Tape & Reel?
A: Packaging variants (Tube, Cut Tape & Digi-Reel, Tape & Reel) indicate delivery format and quantity per reel but do not affect electrical performance. Selection is based on procurement and assembly requirements. All variants of a given part number are electrically identical.
Q: Can REF02CSA+ be used if the application operates below 0°C?
A: No. REF02CSA+ and REF02CSA+T are specified for 0°C to 70°C operation. For applications requiring -40°C operation, use REF02AUG4, REF02AU, REF02CESA+, REF02CESA+T, or ADR02 series parts.
Q: What is the input voltage limitation for REF02CSA+ compared to REF02AUG4?
A: REF02AUG4 accepts input voltages from 8V to 40V. REF02CSA+ and related REF02 series variants with ±1% tolerance accept 8V to 30V. If the application requires input voltages above 30V, REF02AU or ADR02 series must be used.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All substitute parts listed maintain ROHS3 compliance, matching the environmental certification of REF02AUG4.
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