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REF3030AIDBZRG4 Equivalent & Substitute Parts
Part Overview
The REF3030AIDBZRG4 is a series voltage reference IC from Texas Instruments, delivering a fixed 3V output with ±0.2% tolerance in a SOT-23-3 surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The REF3030AIDBZRG4 serves applications requiring stable voltage references with low noise and minimal supply current in compact form factors.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | REF3030AIDBZRG4 |
| Manufacturer | Texas Instruments |
| Output Voltage (Fixed) | 3V |
| Output Current | 25 mA |
| Tolerance | ±0.2% |
| Temperature Coefficient | 75 ppm/°C |
| Input Voltage Range | 3.05V ~ 5.5V |
| Supply Current | 50 µA |
| Operating Temperature | -40°C ~ 125°C |
| Package / Case | TO-236-3, SC-59, SOT-23-3 |
| Mounting Type | Surface Mount |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution for the REF3030AIDBZRG4 is determined by the following critical parameters:
- Output Voltage: 3V fixed output
- Package Type: SOT-23-3 surface mount
- Tolerance: ±0.2% or tighter
- Output Current Capability: Minimum 25 mA
- Input Voltage Range: Compatible with 3.05V ~ 5.5V
- Operating Temperature Range: -40°C ~ 125°C or compatible subset
- Reference Type: Series voltage reference
Substitute parts are grouped into two categories:
Direct Equivalents (Texas Instruments REF3030 Series): Parts with identical electrical specifications and packaging, differing only in product status or packaging format.
Parametric Equivalents (Alternative Manufacturers): Parts from Renesas Electronics and Analog Devices that meet or exceed the core electrical requirements while maintaining SOT-23-3 packaging and 3V fixed output.
Parameter Comparison
| Part Number | Manufacturer | Output Voltage | Output Current | Tolerance | Temp Coefficient | Input Voltage | Supply Current | Operating Temp | Product Status |
|---|---|---|---|---|---|---|---|---|---|
| REF3030AIDBZRG4 | Texas Instruments | 3V | 25 mA | ±0.2% | 75 ppm/°C | 3.05V ~ 5.5V | 50 µA | -40°C ~ 125°C | Obsolete |
| REF3030AIDBZR | Texas Instruments | 3V | 25 mA | ±0.2% | 75 ppm/°C | 3.05V ~ 5.5V | 50 µA | -40°C ~ 125°C | Active |
| REF3030AIDBZT | Texas Instruments | 3V | 25 mA | ±0.2% | 75 ppm/°C | 3.05V ~ 5.5V | 50 µA | -40°C ~ 125°C | Active |
| ISL21010CFH330Z-TK | Renesas Electronics | 3V | 25 mA | ±0.2% | 50 ppm/°C | 3.1V ~ 5.5V | 100 µA | -40°C ~ 125°C | Active |
| LT1460HCS3-3#TRMPBF | Analog Devices | 3V | 40 mA | ±0.2% | 20 ppm/°C | 3.9V ~ 20V | 220 µA | 0°C ~ 70°C | Active |
| LT1460HCS3-3#TRPBF | Analog Devices | 3V | 40 mA | ±0.2% | 20 ppm/°C | 3.9V ~ 20V | 220 µA | 0°C ~ 70°C | Active |
| LT1460JCS3-3#TRMPBF | Analog Devices | 3V | 40 mA | ±0.4% | 20 ppm/°C | 3.9V ~ 20V | 220 µA | 0°C ~ 70°C | Active |
| LT1460JCS3-3#TRPBF | Analog Devices | 3V | 40 mA | ±0.4% | 20 ppm/°C | 3.9V ~ 20V | 220 µA | 0°C ~ 70°C | Active |
| LT1460KCS3-3#TRMPBF | Analog Devices | 3V | 40 mA | ±0.5% | 50 ppm/°C | 3.9V ~ 20V | 220 µA | 0°C ~ 70°C | Active |
| LT1460KCS3-3#TRPBF | Analog Devices | 3V | 40 mA | ±0.5% | 50 ppm/°C | 3.9V ~ 20V | 220 µA | 0°C ~ 70°C | Active |
Engineering Selection Recommendations
Primary Recommendation: REF3030AIDBZR or REF3030AIDBZT from Texas Instruments are direct functional equivalents with identical electrical specifications and active product status. Both parts maintain the same 3V output, ±0.2% tolerance, 25 mA output current, and -40°C ~ 125°C operating range. These are the preferred substitutes for direct replacement in existing designs.
Secondary Recommendation: ISL21010CFH330Z-TK from Renesas Electronics meets all core electrical requirements with identical 3V output, ±0.2% tolerance, and 25 mA output current. This part offers improved temperature coefficient (50 ppm/°C versus 75 ppm/°C) and maintains the full -40°C ~ 125°C operating temperature range. Higher supply current (100 µA versus 50 µA) should be evaluated in power-sensitive applications.
Alternative Consideration: LT1460HCS3-3#TRMPBF and LT1460HCS3-3#TRPBF from Analog Devices provide 3V output with ±0.2% tolerance and superior temperature coefficient (20 ppm/°C). These parts deliver higher output current (40 mA) and operate across a wider input voltage range (3.9V ~ 20V). Operating temperature range is restricted to 0°C ~ 70°C, which may not be suitable for applications requiring full -40°C ~ 125°C coverage.
All substitute parts are RoHS3 compliant, MSL Level 1, and REACH unaffected, matching the compliance profile of the original part.
Frequently Asked Questions (FAQ)
Q: Can REF3030AIDBZR directly replace REF3030AIDBZRG4?
A: Yes. REF3030AIDBZR is electrically and functionally identical to REF3030AIDBZRG4, with the same 3V output, ±0.2% tolerance, 25 mA output current, and SOT-23-3 packaging. The primary difference is product status (active versus obsolete) and packaging format (Cut Tape & Digi-Reel versus standard packaging).
Q: What is the key difference between Texas Instruments REF3030 and Renesas ISL21010CFH330Z-TK?
A: Both deliver 3V output with ±0.2% tolerance in SOT-23-3 packages. The ISL21010CFH330Z-TK has a lower temperature coefficient (50 ppm/°C versus 75 ppm/°C) but requires higher supply current (100 µA versus 50 µA). Input voltage range is slightly higher (3.1V minimum versus 3.05V minimum).
Q: Why do Analog Devices LT1460 parts have different operating temperature ranges?
A: The LT1460 series is rated 0°C ~ 70°C, which is narrower than the REF3030AIDBZRG4 range of -40°C ~ 125°C. Applications requiring full military or extended temperature operation must use Texas Instruments or Renesas alternatives.
Q: Are all substitute parts available in SOT-23-3 packaging?
A: Yes. All listed substitute parts use TO-236-3, SC-59, or SOT-23-3 packaging designations, which are equivalent surface mount packages suitable for direct PCB replacement.
Q: What tolerance options are available among substitutes?
A: Texas Instruments REF3030 series and Renesas ISL21010CFH330Z-TK offer ±0.2% tolerance matching the original part. Analog Devices LT1460HCS3-3 variants provide ±0.2% tolerance, while LT1460JCS3-3 and LT1460KCS3-3 variants offer ±0.4% and ±0.5% tolerance respectively.
Q: Which substitute has the best temperature stability?
A: Analog Devices LT1460HCS3-3 parts offer the lowest temperature coefficient at 20 ppm/°C, compared to 75 ppm/°C for the original REF3030AIDBZRG4 and 50 ppm/°C for Renesas ISL21010CFH330Z-TK. However, the LT1460 operating temperature range is limited to 0°C ~ 70°C.
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