REF102CU/2K5 Equivalent & Substitute Parts

Part Overview

The REF102CU/2K5 is a series voltage reference IC manufactured by Texas Instruments, designed for precision power management applications requiring fixed 10V output. This active product delivers ±0.025% tolerance with 10 mA output current in an 8-SOIC surface mount package. The part is ROHS3 compliant and maintains MSL 2 rating with 1-year moisture sensitivity protection.

Substitute parts are identified when design requirements allow relaxation of tolerance, temperature coefficient, or operating temperature specifications while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	REF102CU/2K5
Manufacturer	Texas Instruments
Reference Type	Series
Output Type	Fixed
Voltage - Output (Min/Fixed)	10V
Current - Output	10 mA
Tolerance	±0.025%
Temperature Coefficient	2.5ppm/°C
Noise - 0.1Hz to 10Hz	5µVp-p
Voltage - Input	11.4V ~ 36V
Current - Supply	1.4mA
Operating Temperature	-25°C ~ 85°C (TA)
Package / Case	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 eligibility for the REF102CU/2K5 is determined by the following critical parameters:

Mandatory Compatibility Requirements:

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

Allowable Variation Parameters:

Tolerance: REF102CU/2K5 specifies ±0.025%; substitutes with ±0.05% or ±0.1% tolerance are acceptable when design margin permits
Temperature coefficient: REF102CU/2K5 specifies 2.5ppm/°C; higher values acceptable if thermal stability requirements are met
Operating temperature range: REF102CU/2K5 specifies -25°C ~ 85°C; narrower ranges acceptable if application operates within substitute part limits
Supply current: REF102CU/2K5 specifies 1.4mA; higher values acceptable if power budget permits
MSL rating: REF102CU/2K5 specifies MSL 2; MSL 1 is acceptable (superior moisture protection)

The Analog Devices AD587 series (AD587JRZ, AD587JRZ-REEL, AD587JRZ-REEL7, AD587KRZ, AD587KRZ-REEL7) meets all mandatory compatibility requirements with controlled relaxation of tolerance and temperature coefficient specifications.

Parameter Comparison

Parameter	REF102CU/2K5	AD587JRZ	AD587JRZ-REEL	AD587JRZ-REEL7	AD587KRZ	AD587KRZ-REEL7
Manufacturer	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Voltage - Output (Min/Fixed)	10V	10V	10V	10V	10V	10V
Current - Output	10 mA	10 mA	10 mA	10 mA	10 mA	10 mA
Tolerance	±0.025%	±0.1%	±0.1%	±0.1%	±0.05%	±0.05%
Temperature Coefficient	2.5ppm/°C	20ppm/°C	20ppm/°C	20ppm/°C	10ppm/°C	10ppm/°C
Noise - 0.1Hz to 10Hz	5µVp-p	4µVp-p	4µVp-p	4µVp-p	4µVp-p	4µVp-p
Voltage - Input	11.4V ~ 36V	14.6V ~ 36V	14.6V ~ 36V	14.6V ~ 36V	14.6V ~ 36V	14.6V ~ 36V
Current - Supply	1.4mA	4mA	4mA	4mA	4mA	4mA
Operating Temperature	-25°C ~ 85°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)
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)
Mounting Type	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
MSL Rating	2 (1 Year)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Packaging Format	Not specified	Tube	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Tube	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

REF102CU/2K5 Primary Selection: Select the REF102CU/2K5 when applications require the tightest tolerance specification (±0.025%) and lowest temperature coefficient (2.5ppm/°C). This part supports extended operating temperature range (-25°C ~ 85°C) and lowest supply current (1.4mA). Active product status with ROHS3 compliance and established supply chain support this selection for precision reference applications.

AD587KRZ / AD587KRZ-REEL7 Substitution (±0.05% Tolerance): The AD587KRZ variants provide intermediate tolerance performance (±0.05%) with temperature coefficient of 10ppm/°C. These parts are suitable when REF102CU/2K5 availability is constrained and design specifications permit relaxation to ±0.05% tolerance. Operating temperature range narrows to 0°C ~ 70°C; verify application thermal requirements. ROHS3 compliance and MSL 1 rating (superior moisture protection) are maintained. Available in Tube (AD587KRZ) and Cut Tape & Digi-Reel® (AD587KRZ-REEL7) packaging formats.

AD587JRZ / AD587JRZ-REEL / AD587JRZ-REEL7 Substitution (±0.1% Tolerance): The AD587JRZ variants accommodate the widest tolerance relaxation (±0.1%) with temperature coefficient of 20ppm/°C. These parts address supply constraints when tolerance specifications can be relaxed to ±0.1%. Operating temperature range remains 0°C ~ 70°C. ROHS3 compliance and MSL 1 rating are maintained. Available in Tube (AD587JRZ), Tape & Reel (AD587JRZ-REEL), and Cut Tape & Digi-Reel® (AD587JRZ-REEL7) packaging formats.

Input Voltage Consideration: All AD587 substitutes specify minimum input voltage of 14.6V compared to REF102CU/2K5 minimum of 11.4V. Verify that application power supply maintains 14.6V minimum to ensure substitute part operation.

Frequently Asked Questions (FAQ)

Q: Can AD587JRZ replace REF102CU/2K5 in my design?

A: AD587JRZ is electrically compatible if your design tolerates ±0.1% output voltage tolerance (versus ±0.025% for REF102CU/2K5) and 20ppm/°C temperature coefficient (versus 2.5ppm/°C). Operating temperature range narrows to 0°C ~ 70°C. Input voltage minimum increases to 14.6V. Verify these parameters against your application requirements before substitution.

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

A: These three part numbers are electrically identical with identical electrical specifications. The differences are packaging format only: AD587JRZ is supplied in Tube packaging, AD587JRZ-REEL in Tape & Reel (TR) format, and AD587JRZ-REEL7 in Cut Tape (CT) & Digi-Reel® format. Select based on your assembly process requirements and inventory management preferences.

Q: Why does AD587KRZ have better specifications than AD587JRZ?

A: AD587KRZ provides tighter tolerance (±0.05% versus ±0.1%) and lower temperature coefficient (10ppm/°C versus 20ppm/°C). Both are Analog Devices products with identical electrical output voltage (10V) and output current (10 mA). AD587KRZ is the intermediate performance option between REF102CU/2K5 and AD587JRZ when supply constraints exist.

Q: Is the 8-SOIC package identical across all parts?

A: Yes. All parts use 8-SOIC (0.154", 3.90mm Width) surface mount package. PCB layout and reflow profiles are compatible across REF102CU/2K5 and all AD587 variants.

Q: What does MSL 1 versus MSL 2 mean for my application?

A: MSL (Moisture Sensitivity Level) indicates moisture absorption risk during storage and handling. REF102CU/2K5 is MSL 2 (1-year shelf life protection required). AD587 variants are MSL 1 (unlimited shelf life). MSL 1 provides superior moisture protection and longer storage capability without baking requirements.

Q: Can I use AD587 parts if my application operates below 0°C?

A: No. AD587 variants specify operating temperature range of 0°C ~ 70°C. If your application requires operation below 0°C, REF102CU/2K5 with -25°C ~ 85°C range is required. Substitution is not possible for low-temperature applications.

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

A: AD587 variants draw 4mA supply current versus 1.4mA for REF102CU/2K5. If your power budget is constrained, calculate total system current draw. For most applications with adequate power supply capacity, this difference is not limiting. Verify your power supply design specifications.

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