REF5025IDRG4 Equivalent & Substitute Parts

Part Overview

The REF5025IDRG4 is a series voltage reference IC manufactured by Texas Instruments, delivering a fixed 2.5V output with ±0.05% tolerance and 10 mA output current in an 8-SOIC surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The REF5025IDRG4 operates across a wide input voltage range of 2.7V to 18V and maintains stable performance across the industrial temperature range of -40°C to 125°C.

Key Parameters

Parameter	REF5025IDRG4
Output Voltage (Fixed)	2.5V
Output Current	10 mA
Tolerance	±0.05%
Temperature Coefficient	3 ppm/°C
Noise (0.1Hz to 10Hz)	7.5 µVpp/V
Input Voltage Range	2.7V ~ 18V
Supply Current	1.2 mA
Operating Temperature	-40°C ~ 125°C
Package	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	2 (1 Year)

Substitute Part Grouping Explanation

Substitution of the REF5025IDRG4 is determined by the following critical parameters:

Electrical Compatibility Requirements:

Fixed output voltage of 2.5V
Output current capability of 10 mA minimum
8-SOIC package format
Surface mount mounting type
Operating temperature range of -40°C to 125°C

Tolerance and Performance Considerations: Substitute parts are grouped based on tolerance specifications (±0.05%, ±0.06%, ±0.1%, ±0.15%, ±0.2%), temperature coefficient, and noise characteristics. Parts with equal or tighter tolerance specifications are direct parametric equivalents. Parts with relaxed tolerance specifications represent functional alternatives where the application permits reduced accuracy.

Input Voltage Range Compatibility: The REF5025IDRG4 accepts 2.7V to 18V input. Substitute parts with input ranges of 4.5V to 36V, 4.5V to 26V, or 2.7V to 12.6V must be evaluated against specific circuit requirements.

Packaging and Compliance: All substitute parts maintain 8-SOIC package compatibility and ROHS3 compliance. Packaging variants (Tube, Cut Tape & Digi-Reel, Tape & Reel) do not affect electrical substitution but affect procurement and handling.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Tolerance	Temp Coeff	Output Current	Input Range	Supply Current	Temp Range	Package	Status
REF5025IDRG4	Texas Instruments	2.5V	±0.05%	3 ppm/°C	10 mA	2.7V ~ 18V	1.2 mA	-40°C ~ 125°C	8-SOIC	Obsolete
REF5025IDR	Texas Instruments	2.5V	±0.05%	3 ppm/°C	10 mA	2.7V ~ 18V	1.2 mA	-40°C ~ 125°C	8-SOIC	Active
MAX873AESA+	Analog Devices Inc./Maxim Integrated	2.5V	±0.06%	7 ppm/°C	10 mA	4.5V ~ 18V	600 µA	-40°C ~ 85°C	8-SOIC	Active
MAX873AESA+T	Analog Devices Inc./Maxim Integrated	2.5V	±0.06%	7 ppm/°C	10 mA	4.5V ~ 18V	600 µA	-40°C ~ 85°C	8-SOIC	Active
MAX873BESA+	Analog Devices Inc./Maxim Integrated	2.5V	±0.1%	20 ppm/°C	10 mA	4.5V ~ 18V	600 µA	-40°C ~ 85°C	8-SOIC	Active
ADR03ARZ	Analog Devices Inc.	2.5V	±0.2%	10 ppm/°C	10 mA	4.5V ~ 36V	1 mA	-40°C ~ 125°C	8-SOIC	Active
ADR03ARZ-REEL7	Analog Devices Inc.	2.5V	±0.2%	10 ppm/°C	10 mA	4.5V ~ 36V	1 mA	-40°C ~ 125°C	8-SOIC	Active
ADR03BRZ	Analog Devices Inc.	2.5V	±0.1%	3 ppm/°C	10 mA	4.5V ~ 36V	1 mA	-40°C ~ 125°C	8-SOIC	Active
ADR03BRZ-REEL7	Analog Devices Inc.	2.5V	±0.1%	3 ppm/°C	10 mA	4.5V ~ 36V	1 mA	-40°C ~ 125°C	8-SOIC	Active
ADR03WARZ-RL	Analog Devices Inc.	2.5V	±0.2%	10 ppm/°C	10 mA	4.5V ~ 26V	1 mA	-40°C ~ 125°C	8-SOIC	Active
LTC1798CS8-2.5#TRPBF	Analog Devices Inc.	2.5V	±0.15%	40 ppm/°C	10 mA	2.7V ~ 12.6V	8.5 µA	0°C ~ 70°C	8-SOIC	Active

Engineering Selection Recommendations

Direct Parametric Equivalent (Recommended Primary Substitute): REF5025IDR is the direct parametric equivalent to REF5025IDRG4. Both parts are manufactured by Texas Instruments with identical electrical specifications: ±0.05% tolerance, 3 ppm/°C temperature coefficient, 2.5V fixed output, and 10 mA output current. REF5025IDR is currently in active production status, ensuring long-term availability. The only difference is packaging format (Cut Tape & Digi-Reel versus the original packaging). This part is suitable for all applications previously using REF5025IDRG4 without circuit modification.

High-Precision Alternatives (Tighter Tolerance): MAX873AESA+ and MAX873AESA+T offer ±0.06% tolerance, representing improved accuracy over the original ±0.05% specification. Both parts maintain 2.5V output and 10 mA current capability. These parts are manufactured by Analog Devices Inc./Maxim Integrated and are actively produced. The input voltage range is restricted to 4.5V to 18V (versus 2.7V to 18V on the original), and the operating temperature range is limited to -40°C to 85°C (versus -40°C to 125°C). Supply current is reduced to 600 µA. These parts are suitable for applications requiring enhanced accuracy where the reduced input voltage range and temperature range are acceptable.

Balanced Alternatives (±0.1% Tolerance): ADR03BRZ and ADR03BRZ-REEL7 provide ±0.1% tolerance with 3 ppm/°C temperature coefficient matching the original part's thermal stability. Both maintain 2.5V output and 10 mA current. Input voltage range extends to 4.5V to 36V, and operating temperature spans -40°C to 125°C. Supply current is reduced to 1 mA. These parts are actively produced by Analog Devices Inc. and are suitable for applications where the relaxed tolerance is acceptable and extended input voltage range is beneficial.

MAX873BESA+ offers ±0.1% tolerance with 20 ppm/°C temperature coefficient. Input range is 4.5V to 18V with operating temperature of -40°C to 85°C. This part is suitable where tolerance relaxation is acceptable but input voltage and temperature range limitations must be considered.

Extended Input Range Alternative (±0.2% Tolerance): ADR03ARZ and ADR03ARZ-REEL7 provide ±0.2% tolerance with extended input voltage range of 4.5V to 36V. Operating temperature range is -40°C to 125°C. Supply current is 1 mA. These parts are actively produced and suitable for applications where tolerance relaxation is acceptable and extended input voltage capability is required.

ADR03WARZ-RL is an automotive-grade variant with ±0.2% tolerance, input range of 4.5V to 26V, and -40°C to 125°C operating temperature. This part is suitable for automotive applications where grade certification is required.

Low-Power Alternative (Limited Temperature Range): LTC1798CS8-2.5#TRPBF offers ±0.15% tolerance with significantly reduced supply current of 8.5 µA. However, the operating temperature range is restricted to 0°C to 70°C, and input voltage range is 2.7V to 12.6V. This part is suitable only for applications operating within the specified temperature and voltage ranges where ultra-low supply current is critical.

Compliance and Availability: All substitute parts maintain ROHS3 compliance and are manufactured by established semiconductor suppliers. REF5025IDR offers the highest compatibility and should be the primary selection for direct replacement. Alternative parts should be selected based on specific application requirements regarding tolerance, temperature range, input voltage range, and supply current constraints.

Frequently Asked Questions (FAQ)

Q: Can REF5025IDR be used as a direct replacement for REF5025IDRG4? A: Yes. REF5025IDR is the direct parametric equivalent with identical electrical specifications and 8-SOIC package. The only difference is packaging format. No circuit modifications are required.

Q: What is the key difference between REF5025IDRG4 and MAX873AESA+? A: MAX873AESA+ offers tighter tolerance (±0.06% versus ±0.05%) but has a restricted input voltage range (4.5V to 18V versus 2.7V to 18V) and reduced operating temperature range (-40°C to 85°C versus -40°C to 125°C). Selection depends on whether these restrictions are acceptable for the application.

Q: Are ADR03BRZ and ADR03BRZ-REEL7 electrically identical? A: Yes. Both parts have identical electrical specifications. The difference is packaging format: ADR03BRZ is supplied in Tube packaging, while ADR03BRZ-REEL7 is supplied in Cut Tape & Digi-Reel format. Selection is based on procurement and assembly requirements.

Q: Can I use a part with ±0.2% tolerance instead of ±0.05%? A: This depends on application requirements. If the circuit design tolerates the relaxed accuracy specification, parts like ADR03ARZ or ADR03WARZ-RL are suitable. If the application requires the original ±0.05% accuracy, only REF5025IDR or MAX873AESA+ are appropriate.

Q: What is the significance of the input voltage range difference? A: The REF5025IDRG4 accepts input voltages as low as 2.7V. Many substitute parts require minimum input of 4.5V. If your circuit supplies less than 4.5V, only REF5025IDR or LTC1798CS8-2.5#TRPBF are suitable. Verify your circuit's input voltage before selecting a substitute.

Q: Why does LTC1798CS8-2.5#TRPBF have such low supply current? A: LTC1798CS8-2.5#TRPBF is designed for ultra-low-power applications. However, this benefit comes with restricted operating temperature range (0°C to 70°C) and input voltage range (2.7V to 12.6V). Use this part only if your application operates within these constraints and requires minimal supply current.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All parts listed are ROHS3 compliant and suitable for applications requiring environmental compliance certification.

Q: What does the "-REEL7" suffix indicate? A: The "-REEL7" suffix indicates the part is supplied in Cut Tape & Digi-Reel packaging format, typically used for automated assembly processes. Parts without this suffix are supplied in Tube packaging. Electrical specifications are identical; the difference is packaging only.

Q: Can I use ADR03WARZ-RL in non-automotive applications? A: Yes. ADR03WARZ-RL is an automotive-grade part but can be used in non-automotive applications. The automotive grade designation indicates it meets additional qualification requirements, making it suitable for any application requiring those performance standards.

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