REF102BUG4 Equivalent & Substitute Parts

Part Overview

The REF102BUG4 is a series voltage reference IC manufactured by Texas Instruments, designed to provide a fixed 10V output with ±0.05% tolerance. This component is classified as a Power Management (PMIC) device and is packaged in an 8-SOIC surface mount configuration. The REF102BUG4 is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	REF102BUG4
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Reference Type	Series
Output Type	Fixed
Voltage - Output (Fixed)	10V
Current - Output	10 mA
Tolerance	±0.05%
Temperature Coefficient	5 ppm/°C
Noise - 0.1Hz to 10Hz	5 µVp-p
Voltage - Input	11.4V ~ 36V
Current - Supply	1.4 mA
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)
Product Status	Discontinued at DiGi Electronics

Substitute Part Grouping Explanation

Substitution eligibility for the REF102BUG4 is determined by the following critical parameters:

Mandatory Compatibility Parameters:

Output voltage: 10V (fixed)
Output current capability: 10 mA minimum
Package type: 8-SOIC surface mount
Input voltage range: Must accommodate 11.4V ~ 36V minimum
Mounting type: Surface mount

Performance Parameters (Allowable Variance):

Tolerance: ±0.05% or better (lower tolerance values are acceptable)
Temperature coefficient: 5 ppm/°C or better
Noise specification: 5 µVp-p or better (0.1Hz to 10Hz)
Operating temperature range: Must include -25°C ~ 85°C or broader

Compliance Parameters:

RoHS3 compliance required
REACH unaffected status required

Substitute parts are grouped into two categories based on tolerance specifications:

Category A - Exact Tolerance Match (±0.05%): REF102BU, AD587KRZ, AD587KRZ-REEL7

Category B - Relaxed Tolerance (±0.1%): AD587JRZ, AD587JRZ-REEL, AD587JRZ-REEL7

Parameter Comparison

Parameter	REF102BUG4	REF102BU	AD587JRZ	AD587JRZ-REEL	AD587JRZ-REEL7	AD587KRZ	AD587KRZ-REEL7
Manufacturer	Texas Instruments	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Voltage - Output (Fixed)	10V	10V	10V	10V	10V	10V	10V
Current - Output	10 mA	10 mA	10 mA	10 mA	10 mA	10 mA	10 mA
Tolerance	±0.05%	±0.05%	±0.1%	±0.1%	±0.1%	±0.05%	±0.05%
Temperature Coefficient	5 ppm/°C	5 ppm/°C	20 ppm/°C	20 ppm/°C	20 ppm/°C	10 ppm/°C	10 ppm/°C
Noise - 0.1Hz to 10Hz	5 µVp-p	5 µVp-p	4 µVp-p	4 µVp-p	4 µVp-p	4 µVp-p	4 µVp-p
Voltage - Input	11.4V ~ 36V	11.4V ~ 36V	14.6V ~ 36V	14.6V ~ 36V	14.6V ~ 36V	14.6V ~ 36V	14.6V ~ 36V
Current - Supply	1.4 mA	1.4 mA	4 mA	4 mA	4 mA	4 mA	4 mA
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
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Discontinued	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Recommendation: REF102BU

REF102BU is the direct functional equivalent manufactured by Texas Instruments. It maintains identical electrical specifications including ±0.05% tolerance, 5 ppm/°C temperature coefficient, and 5 µVp-p noise performance. The part is currently active in production with 1405 units in stock. Packaging is supplied in Tube format. This part is ROHS3 compliant and REACH unaffected, meeting all regulatory requirements.

Secondary Recommendation: AD587KRZ or AD587KRZ-REEL7

AD587KRZ and AD587KRZ-REEL7 are Analog Devices equivalents that match the ±0.05% tolerance specification. Both parts deliver 10V fixed output with 10 mA capability in 8-SOIC packaging. The AD587KRZ-REEL7 variant offers higher inventory availability (2717 units) in Cut Tape & Digi-Reel packaging. Temperature coefficient is 10 ppm/°C, which is superior to the original 5 ppm/°C specification. Operating temperature range is 0°C ~ 70°C, which is narrower than the original -25°C ~ 85°C range. Both parts are ROHS3 compliant and REACH unaffected.

Alternative Option: AD587JRZ, AD587JRZ-REEL, or AD587JRZ-REEL7

These Analog Devices parts feature ±0.1% tolerance, which is relaxed compared to the original ±0.05% specification. Output voltage, current capability, and package type remain compatible. Temperature coefficient is 20 ppm/°C. Operating temperature range is 0°C ~ 70°C. These parts are suitable only for applications where the relaxed tolerance specification is acceptable. All variants are ROHS3 compliant and REACH unaffected. AD587JRZ-REEL offers the highest inventory availability at 9955 units.

Input Voltage Consideration:

Analog Devices parts (AD587 series) require minimum input voltage of 14.6V, compared to 11.4V for the original REF102BUG4 and REF102BU. Applications operating below 14.6V input voltage must use REF102BU.

Frequently Asked Questions (FAQ)

Q: Can AD587JRZ be used as a direct replacement for REF102BUG4?

A: AD587JRZ is mechanically and functionally compatible in 8-SOIC surface mount applications. However, the tolerance specification differs: AD587JRZ provides ±0.1% tolerance versus the original ±0.05%. The part is suitable only if the application design permits the relaxed tolerance. Additionally, the minimum input voltage requirement is 14.6V versus 11.4V for the original part.

Q: What is the difference between AD587JRZ, AD587JRZ-REEL, and AD587JRZ-REEL7?

A: These three part numbers represent the same die and electrical specifications but differ in packaging format. AD587JRZ is supplied in Tube packaging. AD587JRZ-REEL is supplied in Tape & Reel (TR) format. AD587JRZ-REEL7 is supplied in Cut Tape (CT) & Digi-Reel format. Electrical performance is identical across all three variants.

Q: Is REF102BU a direct replacement for REF102BUG4?

A: Yes. REF102BU matches all critical electrical parameters including 10V fixed output, ±0.05% tolerance, 5 ppm/°C temperature coefficient, and 5 µVp-p noise specification. Both parts are manufactured by Texas Instruments in 8-SOIC packaging. The primary difference is product status: REF102BUG4 is discontinued while REF102BU is active in production.

Q: Why do AD587 parts have higher supply current (4 mA) compared to REF102 parts (1.4 mA)?

A: Supply current is a characteristic of the internal circuit design and is provided as specified data. Both specifications meet the functional requirements for 10V fixed voltage reference operation. Applications with strict power budget constraints should prioritize REF102BU or REF102BUG4 equivalents.

Q: Can I use AD587KRZ in applications requiring -25°C operation?

A: No. AD587KRZ operating temperature range is 0°C ~ 70°C. Applications requiring operation at -25°C must use REF102BU, which is rated for -25°C ~ 85°C.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (REF102BU, AD587JRZ, AD587JRZ-REEL, AD587JRZ-REEL7, AD587KRZ, AD587KRZ-REEL7) are ROHS3 compliant and REACH unaffected.

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