REF3325AIDBZRG4 Equivalent & Substitute Parts

Part Overview

The REF3325AIDBZRG4 is a Series Voltage Reference IC from Texas Instruments, delivering a fixed 2.5V output with ±0.15% tolerance in a SOT-23-3 surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part operates across a -40°C to 125°C temperature range with 8.5µA supply current and is suitable for precision analog applications requiring stable voltage references.

Substiute Parts

REF3325AIDBZRG4

Texas InstrumentsIn Stock: 2188REF3325AIDBZRG4 Datasheet

Current PartRFQ

REF3325AIDBZR

Texas InstrumentsIn Stock: 35454REF3325AIDBZR Datasheet

MFR RecommendedRFQ

REF3325AIDBZT

Texas InstrumentsIn Stock: 1514REF3325AIDBZT Datasheet

Parametric EquivalentRFQ

REF3325AIDBZTG4

Texas InstrumentsIn Stock: 2145REF3325AIDBZTG4 Datasheet

Parametric EquivalentRFQ

ADR381ARTZ-R2

Analog Devices Inc.In Stock: 1527ADR381ARTZ-R2 Datasheet

MFR RecommendedRFQ

ADR381ARTZ-REEL7

Analog Devices Inc.In Stock: 32591ADR381ARTZ-REEL7 Datasheet

MFR RecommendedRFQ

ISL21080CIH325Z-TK

Renesas Electronics CorporationIn Stock: 2590ISL21080CIH325Z-TK Datasheet

MFR RecommendedRFQ

MAX6025AEUR+T

Analog Devices Inc./Maxim IntegratedIn Stock: 25307MAX6025AEUR+T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the REF3325AIDBZRG4 is determined by the following critical parameters:

• Output Voltage: Must be fixed at 2.5V
• Package Type: Must be SOT-23-3 (TO-236-3, SC-59)
• Mounting Type: Surface Mount
• Output Current Capability: Minimum 5 mA
• Tolerance: ±0.15% or better (lower tolerance values are acceptable)
• Input Voltage Range: Must support 2.7V ~ 5.5V minimum
• Operating Temperature: Must cover -40°C ~ 125°C or equivalent industrial range
• Compliance: ROHS3 compliant

Substitute parts are grouped into two categories:

Category 1: Direct Texas Instruments Equivalents – REF3325AIDBZR and REF3325AIDBZT maintain identical electrical specifications and differ only in packaging format (Cut Tape vs. Tape & Reel). These are parametrically equivalent with active product status.

Category 2: Cross-Manufacturer Alternatives – ADR381ARTZ-R2, ADR381ARTZ-REEL7, ISL21080CIH325Z-TK, and MAX6025AEUR+T meet the core functional requirements (2.5V fixed output, SOT-23-3 package, 5 mA or greater output current) but exhibit variations in tolerance, temperature coefficient, supply current, and operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: REF3325AIDBZR

REF3325AIDBZR is the preferred substitute for REF3325AIDBZRG4. It maintains identical electrical specifications (±0.15% tolerance, 30ppm/°C temperature coefficient, 8.5µA supply current) and operates across the full -40°C to 125°C temperature range. The part is currently in active production status with 35,400 units in stock, ensuring supply continuity. Packaging is available in Cut Tape and Digi-Reel formats. ROHS3 compliance is maintained.

Secondary Recommendation: REF3325AIDBZT

REF3325AIDBZT is parametrically equivalent to REF3325AIDBZR with identical electrical performance. It is available in Cut Tape and Digi-Reel packaging with active product status. This option is suitable when specific packaging requirements align with Tape & Reel formats.

Cross-Manufacturer Alternatives:

• ADR381ARTZ-REEL7 / ADR381ARTZ-R2 (Analog Devices Inc.): These parts meet the 2.5V fixed output and SOT-23-3 package requirements. Tolerance is ±0.24% (wider than the original ±0.15%), and operating temperature is limited to -40°C ~ 85°C. Supply current is significantly higher at 140µA. Input voltage range extends to 18V, providing greater flexibility in supply applications. Both variants are in active production.

• ISL21080CIH325Z-TK (Renesas Electronics): Offers 2.5V fixed output in SOT-23-3 with ±0.3% tolerance. Operating temperature is -40°C ~ 85°C. Supply current is exceptionally low at 1.5µA. Output current capability is 7 mA, exceeding the original 5 mA specification. This part is suitable for ultra-low-power applications where the reduced operating temperature range is acceptable.

• MAX6025AEUR+T (Analog Devices Inc./Maxim Integrated): Provides 2.5V fixed output with ±0.2% tolerance and 20ppm/°C temperature coefficient. Output current is 500µA, significantly higher than the original 5 mA, making this suitable for applications requiring higher load current. Operating temperature is -40°C ~ 85°C. This part is in active production with high inventory availability.

All substitute parts are ROHS3 compliant and suitable for industrial applications.

Frequently Asked Questions (FAQ)

Q: Can REF3325AIDBZR be used as a direct replacement for REF3325AIDBZRG4?

A: Yes. REF3325AIDBZR is electrically and mechanically identical to REF3325AIDBZRG4. The only difference is product status (active vs. obsolete) and packaging format. No circuit modifications are required.

Q: What is the difference between REF3325AIDBZR and REF3325AIDBZT?

A: Both parts are parametrically equivalent with identical electrical specifications. The difference is in packaging format: REF3325AIDBZR is available in Cut Tape and Digi-Reel, while REF3325AIDBZT is available in Cut Tape and Digi-Reel. Selection depends on your procurement and assembly requirements.

Q: Can I use ADR381ARTZ-REEL7 instead of REF3325AIDBZRG4?

A: ADR381ARTZ-REEL7 is functionally compatible for applications where tolerance of ±0.24% is acceptable instead of ±0.15%. The operating temperature range is limited to -40°C ~ 85°C (vs. -40°C ~ 125°C for the original). Supply current is higher at 140µA. If your application requires the original ±0.15% tolerance and full -40°C ~ 125°C range, use REF3325AIDBZR instead.

Q: What are the key differences between the substitute parts?

A: Tolerance, temperature coefficient, supply current, and operating temperature range vary across substitutes. REF3325AIDBZR maintains the original specifications. ADR381ARTZ variants offer wider input voltage range but higher supply current. ISL21080CIH325Z-TK provides ultra-low supply current. MAX6025AEUR+T offers higher output current capability and better tolerance.

Q: Are all substitute parts in the same SOT-23-3 package?

A: Yes. All substitute parts listed use the SOT-23-3 (TO-236-3, SC-59) surface mount package, ensuring mechanical compatibility with the original design.

Q: Which substitute part has the best tolerance specification?

A: REF3325AIDBZR and REF3325AIDBZT maintain the original ±0.15% tolerance. MAX6025AEUR+T offers ±0.2% tolerance. ADR381ARTZ variants have ±0.24% tolerance. ISL21080CIH325Z-TK has ±0.3% tolerance.

Q: Can I use MAX6025AEUR+T if my circuit requires higher output current?

A: Yes. MAX6025AEUR+T provides 500µA output current, significantly higher than the original 5 mA specification. This makes it suitable for applications requiring higher load current from the reference. Verify that the ±0.2% tolerance and -40°C ~ 85°C operating range meet your application requirements.

Q: What is the supply current difference between substitutes?

A: REF3325AIDBZR and REF3325AIDBZT consume 8.5µA. ISL21080CIH325Z-TK is the lowest at 1.5µA, suitable for battery-powered applications. MAX6025AEUR+T consumes 35µA. ADR381ARTZ variants consume 140µA, the highest among the listed substitutes.