REF3012AIDBZR Equivalent & Substitute Parts

Part Overview

The REF3012AIDBZR is a Series Voltage Reference IC manufactured by Texas Instruments, designed to provide a fixed 1.25V output with ±0.2% tolerance. This active product operates across a 1.8V to 5.5V input range and delivers 25 mA output current in a compact SOT-23-3 surface mount package. The part is ROHS3 compliant with MSL 1 rating and is currently in stock with 20,100 units available.

Equivalent and substitute parts are identified when designs require alternative sourcing due to inventory constraints, lead time considerations, or when design specifications allow for relaxed electrical parameters while maintaining functional compatibility within the same package footprint.

Key Parameters

Parameter	REF3012AIDBZR
Reference Type	Series
Output Type	Fixed
Voltage - Output (Min/Fixed)	1.25V
Current - Output	25 mA
Tolerance	±0.2%
Temperature Coefficient	75ppm/°C
Voltage - Input	1.8V ~ 5.5V
Current - Supply	50µA
Operating Temperature	-40°C ~ 125°C
Package / Case	TO-236-3, SC-59, SOT-23-3
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the REF3012AIDBZR is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Package / Case: TO-236-3, SC-59, SOT-23-3 (physical and electrical pin compatibility)
Reference Type: Series (functional topology)
Output Type: Fixed (voltage regulation architecture)
Voltage - Output: 1.25V nominal (system voltage requirement)
RoHS Status: ROHS3 Compliant (regulatory requirement)
MSL Rating: 1 (Unlimited) (moisture sensitivity compatibility)

Allowable Parameter Variations:

Tolerance: ±0.2% or tighter (±0.08%, ±0.21%, ±0.4% acceptable)
Temperature Coefficient: 20ppm/°C to 75ppm/°C (lower values acceptable)
Current - Output: 7 mA minimum acceptable (REF3012AIDBZR provides 25 mA)
Current - Supply: Lower values acceptable (900nA to 50µA range)
Operating Temperature: -40°C ~ 85°C acceptable (REF3012AIDBZR supports -40°C ~ 125°C)
Voltage - Input: 2.7V ~ 5.5V acceptable (subset of REF3012AIDBZR range)

Parametric equivalents maintain identical electrical specifications. Manufacturer-recommended alternatives provide functional substitution with relaxed electrical parameters suitable for applications where the REF3012AIDBZR specifications exceed design requirements.

Parameter Comparison

Parameter	REF3012AIDBZR	REF3012AIDBZT	ISL21080CIH315Z-TK	ISL60002BIH312Z-TK	ISL60002CIH312Z-TK	ISL60002DIH312Z-TK	MAX6018BEUR12+T
Manufacturer	Texas Instruments	Texas Instruments	Renesas Electronics	Renesas Electronics	Renesas Electronics	Renesas Electronics	Analog Devices Inc./Maxim
Voltage - Output (Min/Fixed)	1.25V	1.25V	1.5V	1.25V	1.25V	1.25V	1.263V
Current - Output	25 mA	25 mA	7 mA	7 mA	7 mA	7 mA	1 mA
Tolerance	±0.2%	±0.2%	±0.5%	±0.08%	±0.2%	±0.4%	±0.4%
Temperature Coefficient	75ppm/°C	75ppm/°C	50ppm/°C	20ppm/°C	20ppm/°C	20ppm/°C	50ppm/°C
Voltage - Input	1.8V ~ 5.5V	1.8V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	1.8V ~ 5.5V
Current - Supply	50µA	50µA	1.5µA	900nA	900nA	900nA	6µA
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Inventory Status	20,100 Pcs	9,694 Pcs	64,705 Pcs	1,825 Pcs	2,400 Pcs	9,066 Pcs	2,260 Pcs

Engineering Selection Recommendations

Parametric Equivalent (Direct Replacement):

REF3012AIDBZT is a parametric equivalent to REF3012AIDBZR with identical electrical specifications. Both parts are manufactured by Texas Instruments, ROHS3 compliant, and rated for -40°C ~ 125°C operation. The REF3012AIDBZT is available in 9,694 units and serves as a direct substitute when REF3012AIDBZR inventory is constrained.

Manufacturer-Recommended Alternatives (Functional Substitutes):

ISL60002 series parts from Renesas Electronics Corporation provide functional substitution with enhanced electrical performance characteristics. ISL60002BIH312Z-TK, ISL60002CIH312Z-TK, and ISL60002DIH312Z-TK all deliver 1.25V fixed output in SOT-23-3 packaging with improved temperature coefficient (20ppm/°C versus 75ppm/°C) and significantly reduced supply current (900nA versus 50µA). These parts are suitable for applications where the REF3012AIDBZR output current specification (25 mA) exceeds circuit requirements and lower quiescent current is beneficial. All ISL60002 variants are ROHS3 compliant with MSL 1 rating.

ISL21080CIH315Z-TK from Renesas Electronics provides 1.5V fixed output with ±0.5% tolerance and is not suitable for 1.25V applications requiring exact voltage matching.

MAX6018BEUR12+T from Analog Devices Inc./Maxim Integrated delivers 1.263V output with ±0.4% tolerance in SOT-23-3 packaging. This part is ROHS3 compliant and suitable for applications tolerating the 1.263V output voltage and 1 mA maximum output current specification.

All recommended alternatives maintain SOT-23-3 package compatibility, ROHS3 compliance, and MSL 1 rating. Selection should be based on specific circuit requirements for output current, operating temperature range, and voltage tolerance.

Frequently Asked Questions (FAQ)

Q: Can ISL60002 series parts replace REF3012AIDBZR in all applications?

A: ISL60002 series parts are functionally compatible when circuit design accommodates reduced output current (7 mA maximum versus 25 mA). Applications requiring the full 25 mA output current must use REF3012AIDBZR or REF3012AIDBZT. All ISL60002 variants maintain SOT-23-3 package compatibility and ROHS3 compliance.

Q: What is the difference between ISL60002BIH312Z-TK, ISL60002CIH312Z-TK, and ISL60002DIH312Z-TK?

A: All three parts deliver 1.25V fixed output in SOT-23-3 packaging with 7 mA output current and 900nA supply current. Tolerance specifications differ: ISL60002BIH312Z-TK provides ±0.08% tolerance, ISL60002CIH312Z-TK provides ±0.2% tolerance, and ISL60002DIH312Z-TK provides ±0.4% tolerance. Temperature coefficient is 20ppm/°C for all variants. Selection depends on voltage accuracy requirements for the application.

Q: Is MAX6018BEUR12+T suitable as a substitute for REF3012AIDBZR?

A: MAX6018BEUR12+T provides 1.263V output with ±0.4% tolerance and 1 mA maximum output current. This part is suitable only for applications where the 1.263V output voltage and 1 mA current limit are acceptable. The output voltage differs from the REF3012AIDBZR 1.25V specification and is not recommended for circuits requiring exact 1.25V reference.

Q: What are the operating temperature range differences between substitute parts?

A: REF3012AIDBZR and REF3012AIDBZT are rated for -40°C ~ 125°C operation. All Renesas Electronics ISL60002 and ISL21080 series parts are rated for -40°C ~ 85°C operation. MAX6018BEUR12+T is rated for -40°C ~ 85°C operation. Applications requiring operation above 85°C must use REF3012AIDBZR or REF3012AIDBZT.

Q: Are all substitute parts ROHS3 compliant?

A: All parts listed in this reference document are ROHS3 compliant with MSL 1 (Unlimited) rating. Regulatory compliance is maintained across all recommended substitutes.

Q: What packaging options are available for these voltage reference ICs?

A: All parts in this reference are available in TO-236-3, SC-59, SOT-23-3 surface mount packaging. REF3012AIDBZR and REF3012AIDBZT are available in Cut Tape (CT) & Digi-Reel® packaging. ISL60002 series parts are available in both Cut Tape (CT) & Digi-Reel® and Tape & Reel (TR) packaging options. MAX6018BEUR12+T is available in Tape & Reel (TR) packaging.

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