REF102CP Equivalent & Substitute Parts

Part Overview

The REF102CP is a series voltage reference IC manufactured by Texas Instruments, designed to provide a fixed 10V output with ±0.025% tolerance. This component belongs to the Power Management (PMIC) category and is packaged in an 8-DIP through-hole configuration. The REF102CP is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations where through-hole mounting or specific performance characteristics are required.

Substiute Parts

REF102CP

Texas InstrumentsIn Stock: 1869REF102CP Datasheet

Current PartRFQ

REF102CU

Texas InstrumentsIn Stock: 1386REF102CU Datasheet

MFR RecommendedRFQ

AD587JNZ

Analog Devices Inc.In Stock: 1412AD587JNZ Datasheet

MFR RecommendedRFQ

AD587KNZ

Analog Devices Inc.In Stock: 1396AD587KNZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the REF102CP is determined by the following critical parameters:

Fixed Output Voltage: All substitute parts must provide 10V fixed output to maintain circuit compatibility.

Output Current Capability: Minimum 10 mA output current is required.

Tolerance and Stability: The REF102CP specifies ±0.025% tolerance and 2.5ppm/°C temperature coefficient. Substitutes may have different tolerance and temperature coefficient values; selection depends on application requirements.

Input Voltage Range: The REF102CP accepts 11.4V to 36V input. Substitutes with different input ranges may require circuit redesign.

Mounting Type and Package: Through-hole 8-DIP packaging is the primary constraint for direct pin-compatible replacement. Surface-mount alternatives require PCB redesign.

Operating Temperature Range: The REF102CP operates from -25°C to 85°C. Substitutes with narrower temperature ranges may not be suitable for all applications.

Supply Current: The REF102CP draws 1.4mA. Higher supply current consumption affects power budget calculations.

Substitutes are grouped into two categories: direct pin-compatible replacements (same package) and functional equivalents (different package, same electrical performance).

Parameter Comparison

Engineering Selection Recommendations

REF102CU (Texas Instruments): This part is the direct functional equivalent from the same manufacturer with identical electrical specifications (±0.025% tolerance, 2.5ppm/°C temperature coefficient, 1.4mA supply current). The REF102CU is active and ROHS3 compliant. The primary difference is packaging: REF102CU uses 8-SOIC surface-mount configuration instead of through-hole 8-DIP. Selection of REF102CU requires PCB redesign to accommodate surface-mount footprint but provides the closest electrical match and maintains Texas Instruments supply chain continuity.

AD587KNZ (Analog Devices Inc.): This part maintains through-hole 8-DIP packaging identical to the REF102CP, enabling direct pin-compatible replacement without PCB modification. The AD587KNZ is active and ROHS3 compliant. Electrical performance differs: tolerance is ±0.05% (versus ±0.025%), temperature coefficient is 10ppm/°C (versus 2.5ppm/°C), and supply current is 4mA (versus 1.4mA). Operating temperature range is 0°C to 70°C (versus -25°C to 85°C). Input voltage minimum is 14.6V (versus 11.4V). Selection of AD587KNZ is appropriate for applications where through-hole mounting is mandatory and the relaxed tolerance and temperature coefficient specifications are acceptable.

AD587JNZ (Analog Devices Inc.): This part also maintains through-hole 8-DIP packaging for direct pin-compatible replacement. The AD587JNZ is active and ROHS3 compliant. Electrical performance is less precise than AD587KNZ: tolerance is ±0.1%, temperature coefficient is 20ppm/°C, and supply current is 4mA. Operating temperature range is 0°C to 70°C, and input voltage minimum is 14.6V. Selection of AD587JNZ is appropriate only when tolerance and temperature stability requirements are less stringent than the original REF102CP specification.

Compliance Basis: All substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory status of the REF102CP. REF102CU and AD587KNZ maintain MSL 1 (unlimited moisture sensitivity), while REF102CU carries MSL 2 (1 year). Selection should account for storage and handling requirements in manufacturing environments.

Frequently Asked Questions (FAQ)

Q: Can REF102CU be used as a direct replacement for REF102CP?

A: REF102CU provides identical electrical specifications and is pin-compatible in function. However, REF102CU uses 8-SOIC surface-mount packaging while REF102CP uses 8-DIP through-hole packaging. Direct PCB substitution is not possible without redesign of the footprint and routing.

Q: What are the key differences between AD587KNZ and AD587JNZ?

A: Both parts use identical 8-DIP through-hole packaging. AD587KNZ specifies ±0.05% tolerance and 10ppm/°C temperature coefficient, while AD587JNZ specifies ±0.1% tolerance and 20ppm/°C temperature coefficient. AD587KNZ provides superior output voltage stability and is the preferred choice when precision is required.

Q: Can AD587KNZ replace REF102CP without circuit modification?

A: AD587KNZ is pin-compatible and uses the same 8-DIP through-hole package, allowing direct socket replacement. However, circuit performance will differ due to relaxed tolerance (±0.05% versus ±0.025%), higher temperature coefficient (10ppm/°C versus 2.5ppm/°C), higher supply current (4mA versus 1.4mA), narrower operating temperature range (0°C to 70°C versus -25°C to 85°C), and higher minimum input voltage (14.6V versus 11.4V). Verify that these differences are acceptable for the specific application.

Q: What is the impact of different supply current specifications?

A: REF102CP draws 1.4mA while AD587KNZ and AD587JNZ draw 4mA. In battery-powered or power-constrained applications, the higher supply current of Analog Devices parts increases power consumption. Power supply design must accommodate the higher current draw.

Q: Are there temperature range limitations with Analog Devices substitutes?

A: Yes. REF102CP operates from -25°C to 85°C, while AD587KNZ and AD587JNZ operate from 0°C to 70°C. Applications requiring operation below 0°C or above 70°C cannot use Analog Devices substitutes. REF102CU maintains the full -25°C to 85°C range.

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

A: REF102CP and REF102CU require minimum 11.4V input. AD587KNZ and AD587JNZ require minimum 14.6V input. Circuits with input voltages between 11.4V and 14.6V cannot use Analog Devices parts.

Q: How does tolerance affect circuit design?

A: REF102CP specifies ±0.025% tolerance, REF102CU also ±0.025%, AD587KNZ ±0.05%, and AD587JNZ ±0.1%. Tighter tolerance ensures more precise output voltage across the production population. Applications requiring output voltage accuracy better than ±0.05% must use REF102CP or REF102CU.

Q: What packaging considerations apply to each substitute?

A: REF102CP, AD587KNZ, and AD587JNZ use through-hole 8-DIP packaging suitable for breadboard prototyping and legacy PCB designs. REF102CU uses surface-mount 8-SOIC packaging, requiring SMT assembly equipment and modern PCB design. Package selection depends on manufacturing capability and PCB design constraints.