REF5025IDG4 Equivalent & Substitute Parts

Part Overview

The REF5025IDG4 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 capability. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and production continuity. The part is housed in an 8-SOIC surface mount package and operates across the industrial temperature range of -40°C to 125°C.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	2.5V
Output Current	10 mA
Tolerance	±0.05%
Temperature Coefficient	3 ppm/°C
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

Substitute Part Grouping Explanation

Substitution of the REF5025IDG4 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

Output voltage: 2.5V fixed
Package type: 8-SOIC form factor
Output current capability: 10 mA minimum
Operating temperature range: -40°C to 125°C minimum
Surface mount mounting type
RoHS3 compliance

Allowable Variation Parameters:

Tolerance: May be equal to or tighter than ±0.05%
Temperature coefficient: May be equal to or lower than 3 ppm/°C
Input voltage range: May be equal to or wider than 2.7V ~ 18V
Supply current: May be equal to or lower than 1.2 mA
Noise specifications: May be equal to or lower than specified values

Substitute parts are grouped by tolerance grade, as this directly impacts circuit performance and accuracy requirements. Parts with tighter tolerances (±0.06%, ±0.1%, ±0.15%, ±0.2%) are acceptable replacements for the ±0.05% specification.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Tolerance	Temp Coeff	Input Range	Supply Current	Operating Temp	Package	Status
REF5025IDG4	Texas Instruments	2.5V	±0.05%	3 ppm/°C	2.7V ~ 18V	1.2 mA	-40°C ~ 125°C	8-SOIC	Obsolete
REF5025ID	Texas Instruments	2.5V	±0.05%	3 ppm/°C	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	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	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	4.5V ~ 18V	600 µA	-40°C ~ 85°C	8-SOIC	Active
ADR03ARZ	Analog Devices Inc.	2.5V	±0.2%	10 ppm/°C	4.5V ~ 36V	1 mA	-40°C ~ 125°C	8-SOIC	Active
ADR03ARZ-REEL7	Analog Devices Inc.	2.5V	±0.2%	10 ppm/°C	4.5V ~ 36V	1 mA	-40°C ~ 125°C	8-SOIC	Active
ADR03BRZ	Analog Devices Inc.	2.5V	±0.1%	3 ppm/°C	4.5V ~ 36V	1 mA	-40°C ~ 125°C	8-SOIC	Active
ADR03BRZ-REEL7	Analog Devices Inc.	2.5V	±0.1%	3 ppm/°C	4.5V ~ 36V	1 mA	-40°C ~ 125°C	8-SOIC	Active
ADR03WARZ-RL	Analog Devices Inc.	2.5V	±0.2%	10 ppm/°C	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	2.7V ~ 12.6V	8.5 µA	0°C ~ 70°C	8-SOIC	Active

Engineering Selection Recommendations

Primary Recommendation: REF5025ID

The REF5025ID is the direct active equivalent to the obsolete REF5025IDG4. Both parts are manufactured by Texas Instruments and share identical electrical specifications: 2.5V fixed output, ±0.05% tolerance, 3 ppm/°C temperature coefficient, and -40°C to 125°C operating range. The REF5025ID differs only in packaging format (Tube vs. unspecified for the original) and product status (Active vs. Obsolete). This part provides seamless design compatibility with zero performance trade-offs.

Secondary Recommendations by Application Requirements:

For designs requiring tighter tolerance and lower noise performance, the MAX873AESA+ and MAX873AESA+T (±0.06% tolerance) offer superior accuracy with reduced noise specifications (3.8 µVp-p vs. 7.5 µVp-p). These parts operate at -40°C to 85°C, which is acceptable for most industrial applications within the original temperature range. Supply current is reduced to 600 µA, providing power efficiency benefits.

For applications where the full -40°C to 125°C temperature range is mandatory and tolerance of ±0.1% is acceptable, the ADR03BRZ and ADR03BRZ-REEL7 are suitable. These Analog Devices parts maintain the 3 ppm/°C temperature coefficient of the original and support a wider input voltage range (4.5V ~ 36V).

For cost-optimized designs where ±0.2% tolerance is acceptable, the ADR03ARZ, ADR03ARZ-REEL7, and ADR03WARZ-RL provide full temperature range coverage (-40°C ~ 125°C) with extended input voltage ranges and lower supply current (1 mA).

The LTC1798CS8-2.5#TRPBF is suitable only for applications with restricted operating temperature (0°C ~ 70°C) and input voltage (2.7V ~ 12.6V) requirements, as it does not meet the full industrial temperature specification of the original part.

All recommended substitutes maintain RoHS3 compliance and 8-SOIC package compatibility.

Frequently Asked Questions (FAQ)

Q: Can I use REF5025ID as a direct replacement for REF5025IDG4?

A: Yes. The REF5025ID is the active production equivalent with identical electrical specifications. The only difference is product status (Active vs. Obsolete) and packaging format. No circuit modifications are required.

Q: What is the difference between MAX873AESA+ and MAX873AESA+T?

A: Both parts have identical electrical specifications. The difference is packaging: MAX873AESA+ is supplied in Tube format, while MAX873AESA+T is supplied in Tape & Reel (TR) format. Select based on your procurement and assembly requirements.

Q: Can I use ADR03ARZ instead of REF5025IDG4?

A: ADR03ARZ is electrically compatible but with tolerance trade-offs. It provides ±0.2% tolerance versus the original ±0.05%, and operates at -40°C to 125°C. The wider input voltage range (4.5V ~ 36V) and lower supply current (1 mA) are benefits. Use this part only if your circuit design tolerates ±0.2% output voltage variation.

Q: Why does LTC1798CS8-2.5#TRPBF have a restricted operating temperature range?

A: The LTC1798CS8-2.5#TRPBF is specified for 0°C to 70°C operation, which does not cover the full industrial temperature range (-40°C to 125°C) of the original REF5025IDG4. This part is suitable only for applications with narrower temperature requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are RoHS3 compliant, matching the compliance status of the original REF5025IDG4.

Q: What is the difference between ADR03BRZ and ADR03ARZ?

A: Both are Analog Devices parts in 8-SOIC packages with 2.5V output and -40°C to 125°C operation. ADR03BRZ offers ±0.1% tolerance with 3 ppm/°C temperature coefficient. ADR03ARZ offers ±0.2% tolerance with 10 ppm/°C temperature coefficient. Select ADR03BRZ for tighter accuracy requirements.

Q: Can I mix packaging formats (Tube vs. Tape & Reel) in production?

A: Yes. Parts with identical part numbers but different packaging suffixes (e.g., ADR03BRZ vs. ADR03BRZ-REEL7) have identical electrical specifications. Packaging format affects procurement, storage, and assembly processes but not circuit performance. Verify your assembly equipment compatibility with the selected packaging format.

Q: What is the minimum input voltage requirement for substitute parts?

A: The original REF5025IDG4 requires 2.7V minimum input. Most substitutes (ADR03 series, MAX873 series) require 4.5V minimum input. The LTC1798CS8-2.5#TRPBF maintains the 2.7V minimum. Verify your power supply design meets the input voltage requirement of your selected substitute.

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