REF102AUG4 Equivalent & Substitute Parts

Part Overview

The REF102AUG4 is a series voltage reference IC manufactured by Texas Instruments, designed to provide a fixed 10V output with ±0.1% tolerance. This component operates as a precision voltage reference in power management applications, featuring an 8-SOIC surface mount package. The REF102AUG4 is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. Substitute parts must maintain electrical compatibility across output voltage, tolerance, and operating temperature ranges while accommodating packaging and supply current variations.

Key Parameters

Parameter	REF102AUG4 (Main Part)
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Product Status	Obsolete
Reference Type	Series
Output Type	Fixed
Voltage - Output (Min/Fixed)	10V
Current - Output	10 mA
Tolerance	±0.1%
Temperature Coefficient	10ppm/°C
Noise - 0.1Hz to 10Hz	5µVp-p
Voltage - Input	11.4V ~ 36V
Current - Supply	1.4mA
Operating Temperature	-25°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	8-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)

Substitute Part Grouping Explanation

Substitution for the REF102AUG4 is determined by the following critical parameters:

Electrical Compatibility Requirements:

Output voltage must be 10V fixed
Output current capability must be 10 mA minimum
Tolerance must be ±0.1% or better (tighter tolerance acceptable)
Temperature coefficient must be 10ppm/°C or better
Input voltage range must encompass or exceed 11.4V ~ 36V
Operating temperature range must encompass or exceed -25°C ~ 85°C

Mechanical & Packaging Compatibility:

Package type must be 8-SOIC (0.154", 3.90mm Width)
Surface mount mounting type required
Packaging format (Tube, Tape & Reel, Cut Tape) does not affect electrical substitution

Compliance Requirements:

RoHS3 compliance required
REACH unaffected status required

Substitute parts are grouped into two categories based on tolerance specification: ±0.1% tolerance parts (REF102AU, AD587JRZ, AD587JRZ-REEL, AD587JRZ-REEL7) and ±0.05% tolerance parts (AD587KRZ, AD587KRZ-REEL, AD587KRZ-REEL7). All substitute parts meet or exceed the electrical and mechanical requirements of the obsolete REF102AUG4.

Parameter Comparison

Parameter	REF102AUG4	REF102AU	AD587JRZ	AD587JRZ-REEL	AD587JRZ-REEL7	AD587KRZ	AD587KRZ-REEL	AD587KRZ-REEL7
Manufacturer	Texas Instruments	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
Voltage - Output	10V	10V	10V	10V	10V	10V	10V	10V
Current - Output	10 mA	10 mA	10 mA	10 mA	10 mA	10 mA	10 mA	10 mA
Tolerance	±0.1%	±0.1%	±0.1%	±0.1%	±0.1%	±0.05%	±0.05%	±0.05%
Temperature Coefficient	10ppm/°C	10ppm/°C	20ppm/°C	20ppm/°C	20ppm/°C	10ppm/°C	10ppm/°C	10ppm/°C
Noise - 0.1Hz to 10Hz	5µVp-p	5µVp-p	4µVp-p	4µVp-p	4µVp-p	4µVp-p	4µVp-p	4µVp-p
Voltage - Input	11.4V ~ 36V	11.4V ~ 36V	14.6V ~ 36V	14.6V ~ 36V	14.6V ~ 36V	14.6V ~ 36V	14.6V ~ 36V	14.6V ~ 36V
Current - Supply	1.4mA	1.4mA	4mA	4mA	4mA	4mA	4mA	4mA
Operating Temperature	-25°C ~ 85°C	-25°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)	2 (1 Year)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitute: REF102AU

REF102AU is the direct Texas Instruments equivalent to the obsolete REF102AUG4. It maintains identical electrical specifications including 10V output, ±0.1% tolerance, 10ppm/°C temperature coefficient, and -25°C ~ 85°C operating temperature range. REF102AU is active in production status and available in Tube packaging. This part is the preferred choice for direct replacement in existing designs.

Alternative Substitutes: AD587 Series (Analog Devices Inc.)

The AD587 series from Analog Devices provides functional equivalence with the following considerations:

AD587JRZ, AD587JRZ-REEL, and AD587JRZ-REEL7 maintain ±0.1% tolerance matching the REF102AUG4 specification. These parts feature improved noise performance (4µVp-p versus 5µVp-p) and are available in multiple packaging formats (Tube, Tape & Reel, Cut Tape & Digi-Reel). Operating temperature range is 0°C ~ 70°C, which is narrower than the REF102AUG4 range of -25°C ~ 85°C. Minimum input voltage is 14.6V versus 11.4V for the REF102AUG4. Supply current is 4mA versus 1.4mA. These parts are suitable for applications operating within the 0°C ~ 70°C temperature window.

AD587KRZ, AD587KRZ-REEL, and AD587KRZ-REEL7 provide enhanced tolerance of ±0.05%, exceeding the REF102AUG4 specification. Temperature coefficient matches at 10ppm/°C. These parts are available in Tube, Tape & Reel, and Cut Tape & Digi-Reel packaging formats. Operating temperature range and input voltage constraints are identical to the AD587J series. These parts are suitable for applications requiring tighter output voltage tolerance.

All substitute parts are ROHS3 compliant and REACH unaffected. Packaging format selection (Tube, Tape & Reel, Cut Tape & Digi-Reel) does not affect electrical performance and should be determined by assembly process requirements.

Frequently Asked Questions (FAQ)

Q: Can REF102AU directly replace REF102AUG4 in existing designs?

A: Yes. REF102AU is the active production equivalent manufactured by Texas Instruments. It maintains identical electrical specifications including output voltage, tolerance, temperature coefficient, and operating temperature range. No design modifications are required.

Q: What are the key differences between AD587JRZ and AD587KRZ?

A: The primary difference is output voltage tolerance. AD587JRZ provides ±0.1% tolerance matching the REF102AUG4 specification. AD587KRZ provides tighter ±0.05% tolerance. Both maintain 10ppm/°C temperature coefficient and identical package dimensions. Selection depends on tolerance requirements of the application.

Q: Why do AD587 series parts have a narrower operating temperature range than REF102AUG4?

A: The AD587 series operates from 0°C ~ 70°C, while REF102AUG4 operates from -25°C ~ 85°C. Applications requiring operation below 0°C or above 70°C must use REF102AU or remain with the original REF102AUG4 specification. This is a hard constraint for temperature-critical applications.

Q: What is the impact of higher supply current in AD587 series parts?

A: AD587 series parts draw 4mA supply current compared to 1.4mA for REF102AUG4. This increased current consumption affects power budget calculations and thermal design. Applications with strict power constraints should prioritize REF102AU.

Q: Does packaging format affect electrical performance?

A: No. Tube, Tape & Reel (TR), and Cut Tape & Digi-Reel (CT) packaging formats contain identical die and electrical specifications. Packaging selection is determined by assembly process requirements and volume considerations, not electrical performance.

Q: What is the significance of MSL rating differences?

A: REF102AUG4 has MSL 2 (1 Year) while AD587 series parts have MSL 1 (Unlimited). MSL 1 indicates lower moisture sensitivity and longer shelf life without baking. AD587 series parts offer superior moisture handling characteristics, reducing risk of moisture-related failures during storage and assembly.

Q: Can AD587 parts be used in applications requiring -25°C operation?

A: No. AD587 series parts are specified for 0°C ~ 70°C operation only. Applications requiring -25°C minimum operating temperature must use REF102AU or equivalent parts with extended temperature range specifications.

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

A: REF102AUG4 and REF102AU require minimum 11.4V input. AD587 series parts require minimum 14.6V input. Designs with input voltages between 11.4V and 14.6V must use REF102AU or REF102AUG4 specification.

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