REF5025AIDRG4 Equivalent & Substitute Parts

Part Overview

The REF5025AIDRG4 is a series voltage reference IC manufactured by Texas Instruments, delivering a fixed 2.5V output with ±0.1% tolerance and 10 mA output current capability. This component is classified as obsolete, which necessitates identification of active equivalent and substitute parts for new designs and production continuity. The 8-SOIC surface mount package and specified electrical characteristics define the substitution scope for this power management IC.

Key Parameters

Parameter	REF5025AIDRG4
Manufacturer	Texas Instruments
Output Voltage (Fixed)	2.5V
Output Current	10 mA
Tolerance	±0.1%
Temperature Coefficient	8ppm/°C
Input Voltage Range	2.7V ~ 18V
Supply Current	1.2mA
Operating Temperature	-40°C ~ 125°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the REF5025AIDRG4 is determined by the following critical parameters:

Primary Substitution Criteria:

Fixed output voltage of 2.5V
Output current capability of 10 mA minimum
Tolerance of ±0.1% or better
8-SOIC package configuration
Surface mount mounting type
Operating temperature range of -40°C to 125°C minimum

Substitution Categories:

Parametric Equivalents (Texas Instruments REF5025 Series): REF5025AIDR and REF5025AQDRQ1 are direct parametric equivalents with identical electrical specifications. Both are active products with the same 2.5V output, ±0.1% tolerance, 8ppm/°C temperature coefficient, and 8-SOIC packaging. REF5025AQDRQ1 includes automotive-grade qualification (AEC-Q100).

Manufacturer Recommended Substitutes (Analog Devices ADR03 Series): ADR03ARZ, ADR03ARZ-REEL7, ADR03BRZ, and ADR03BRZ-REEL7 meet the core electrical requirements with 2.5V fixed output and 10 mA capability. ADR03BRZ and ADR03BRZ-REEL7 match the ±0.1% tolerance specification. All variants use 8-SOIC packaging and support the full -40°C to 125°C operating range. Input voltage range extends to 36V, providing broader supply compatibility.

Manufacturer Recommended Substitutes (Analog Devices/Maxim MAX873 Series): MAX873AESA+, MAX873AESA+T, MAX873BESA+, and MAX873BESA+ variants deliver 2.5V fixed output with 10 mA capability in 8-SOIC packages. MAX873BESA+ matches ±0.1% tolerance. These parts feature superior noise performance and lower supply current (600µA vs. 1.2mA). Operating temperature range is -40°C to 85°C, which is narrower than the original specification.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Tolerance	Temp Coeff	Input Voltage	Supply Current	Operating Temp	Package	Status
REF5025AIDRG4	Texas Instruments	2.5V	±0.1%	8ppm/°C	2.7V ~ 18V	1.2mA	-40°C ~ 125°C	8-SOIC	Obsolete
REF5025AIDR	Texas Instruments	2.5V	±0.1%	8ppm/°C	2.7V ~ 18V	1.2mA	-40°C ~ 125°C	8-SOIC	Active
REF5025AQDRQ1	Texas Instruments	2.5V	±0.1%	8ppm/°C	2.7V ~ 18V	1.2mA	-40°C ~ 125°C	8-SOIC	Active
ADR03BRZ	Analog Devices	2.5V	±0.1%	3ppm/°C	4.5V ~ 36V	1mA	-40°C ~ 125°C	8-SOIC	Active
ADR03BRZ-REEL7	Analog Devices	2.5V	±0.1%	3ppm/°C	4.5V ~ 36V	1mA	-40°C ~ 125°C	8-SOIC	Active
ADR03ARZ	Analog Devices	2.5V	±0.2%	10ppm/°C	4.5V ~ 36V	1mA	-40°C ~ 125°C	8-SOIC	Active
ADR03ARZ-REEL7	Analog Devices	2.5V	±0.2%	10ppm/°C	4.5V ~ 36V	1mA	-40°C ~ 125°C	8-SOIC	Active
ADR03WARZ-RL	Analog Devices	2.5V	±0.2%	10ppm/°C	4.5V ~ 26V	1mA	-40°C ~ 125°C	8-SOIC	Active
MAX873AESA+	Analog Devices/Maxim	2.5V	±0.06%	7ppm/°C	4.5V ~ 18V	600µA	-40°C ~ 85°C	8-SOIC	Active
MAX873AESA+T	Analog Devices/Maxim	2.5V	±0.06%	7ppm/°C	4.5V ~ 18V	600µA	-40°C ~ 85°C	8-SOIC	Active
MAX873BESA+	Analog Devices/Maxim	2.5V	±0.1%	20ppm/°C	4.5V ~ 18V	600µA	-40°C ~ 85°C	8-SOIC	Active

Engineering Selection Recommendations

Direct Replacement (Highest Compatibility): REF5025AIDR and REF5025AQDRQ1 are the primary recommendations as Texas Instruments parametric equivalents. Both maintain identical electrical specifications and 8-SOIC packaging. REF5025AIDR is suitable for general industrial applications. REF5025AQDRQ1 is qualified to AEC-Q100 automotive standards and includes automotive-grade designation, making it appropriate for automotive and high-reliability applications.

Cross-Manufacturer Substitutes (Analog Devices ADR03 Series): ADR03BRZ and ADR03BRZ-REEL7 provide ±0.1% tolerance matching with improved temperature coefficient (3ppm/°C vs. 8ppm/°C) and lower supply current (1mA vs. 1.2mA). The extended input voltage range (4.5V ~ 36V) accommodates broader supply configurations. Both maintain full -40°C to 125°C operating temperature coverage. Packaging differences (Tube vs. Cut Tape & Digi-Reel) affect procurement and assembly workflows.

ADR03ARZ, ADR03ARZ-REEL7, and ADR03WARZ-RL offer ±0.2% tolerance, which is acceptable for applications where ±0.1% precision is not critical. These variants provide cost optimization while maintaining core functionality.

Cross-Manufacturer Substitutes (Analog Devices/Maxim MAX873 Series): MAX873BESA+ matches the ±0.1% tolerance requirement with superior noise performance and lower supply current consumption. However, the operating temperature range limitation (-40°C to 85°C) excludes this part from applications requiring full -40°C to 125°C coverage. MAX873AESA+ and MAX873AESA+T offer tighter tolerance (±0.06%) but are restricted to -40°C to 85°C operation.

Compliance and Certification: All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, matching the original part's regulatory posture. REF5025AQDRQ1 and ADR03WARZ-RL carry automotive-grade qualification for applications requiring automotive standards compliance.

Frequently Asked Questions (FAQ)

Q: Can REF5025AIDR directly replace REF5025AIDRG4 without circuit modifications? A: Yes. REF5025AIDR is a parametric equivalent with identical electrical specifications, output voltage, tolerance, temperature coefficient, and 8-SOIC packaging. The primary difference is product status (Active vs. Obsolete) and packaging format availability.

Q: What is the difference between ADR03BRZ and ADR03ARZ? A: Both are Analog Devices 2.5V reference ICs in 8-SOIC packages with identical output current and operating temperature range. ADR03BRZ specifies ±0.1% tolerance with 3ppm/°C temperature coefficient. ADR03ARZ specifies ±0.2% tolerance with 10ppm/°C temperature coefficient. Selection depends on tolerance requirements for the application.

Q: Why do MAX873 parts have a narrower operating temperature range? A: MAX873AESA+ and MAX873BESA+ are specified for -40°C to 85°C operation, which is narrower than the REF5025AIDRG4 specification of -40°C to 125°C. These parts are suitable only for applications where the upper temperature limit does not exceed 85°C.

Q: What packaging options are available for ADR03BRZ? A: ADR03BRZ is supplied in Tube packaging. ADR03BRZ-REEL7 is the equivalent part supplied in Cut Tape & Digi-Reel format. Both have identical electrical specifications; packaging selection depends on assembly and procurement requirements.

Q: Are all substitute parts RoHS compliant? A: Yes. All recommended substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the regulatory compliance of the original REF5025AIDRG4.

Q: Which substitute is recommended for automotive applications? A: REF5025AQDRQ1 carries AEC-Q100 automotive qualification and automotive-grade designation. ADR03WARZ-RL also includes automotive-grade qualification. Both are suitable for automotive applications requiring standards compliance.

Q: Can I use MAX873BESA+ as a drop-in replacement? A: MAX873BESA+ is mechanically compatible (8-SOIC package) and electrically compatible for tolerance and output voltage. However, the operating temperature range is limited to -40°C to 85°C. Use this part only if your application does not require operation above 85°C.

Q: What is the inventory status of these substitute parts? A: REF5025AIDR has 35,200 pcs in stock. REF5025AQDRQ1 has 35,300 pcs in stock. ADR03BRZ has 6,134 pcs in stock. ADR03BRZ-REEL7 has 6,732 pcs in stock. MAX873BESA+ has 2,429 pcs in stock. Inventory levels support production continuity for all recommended substitutes.

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