LT1004CLP-2-5 Equivalent & Substitute Parts

Part Overview

The LT1004CLP-2-5 is a shunt voltage reference IC manufactured by Texas Instruments, delivering a fixed 2.5V output with ±0.8% tolerance. This through-hole component operates across 0°C to 70°C and is packaged in TO-92-3. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute options range from direct functional equivalents to upgraded alternatives with extended temperature ranges and improved specifications.

Key Parameters

Parameter	Value
Reference Type	Shunt
Output Voltage	2.5V Fixed
Output Current	20 mA
Tolerance	±0.8%
Temperature Coefficient	20ppm/°C Typical
Noise (10Hz to 10kHz)	120µVrms
Cathode Current	20 µA
Operating Temperature	0°C ~ 70°C
Package	TO-92-3 (TO-226-3)
Mounting Type	Through Hole

Substitute Part Grouping Explanation

Substitution for the LT1004CLP-2-5 is determined by strict alignment of electrical and mechanical parameters. All substitute parts maintain the core specifications: 2.5V fixed output, 20 mA output current, 120µVrms noise performance, and TO-92-3 through-hole packaging. Substitutes are grouped into three categories based on tolerance and temperature range compatibility:

Direct Equivalents (±0.8% Tolerance): Parts matching the original tolerance specification, suitable for applications requiring precision voltage reference performance identical to the LT1004CLP-2-5.

Upgraded Alternatives (±1.5% Tolerance, Extended Temperature): Parts with relaxed tolerance but extended operating range (-40°C to 85°C), appropriate for designs requiring broader temperature support with acceptable tolerance trade-offs.

Parametric Equivalents (±0.8% Tolerance, Extended Temperature): Parts maintaining original tolerance with extended temperature capability, offering both precision and operational flexibility.

The critical parameters determining substitutability are: output voltage (2.5V), output current (20 mA), package type (TO-92-3), and noise specification (120µVrms). Temperature coefficient and cathode current variations are secondary considerations based on application requirements.

Parameter Comparison

Part Number	Manufacturer	Tolerance	Temp Coeff	Operating Temp	Cathode Current	Product Status
LT1004CLP-2-5	Texas Instruments	±0.8%	20ppm/°C	0°C ~ 70°C	20 µA	Obsolete
LT1004CZ-2.5#PBF	Analog Devices Inc.	±0.8%	20ppm/°C	0°C ~ 70°C	20 µA	Active
LT1004IZ-2.5#PBF	Analog Devices Inc.	±0.8%	20ppm/°C	-40°C ~ 85°C	20 µA	Active
LT1004CLPE3-2-5	Texas Instruments	±0.8%	20ppm/°C	0°C ~ 70°C	20 µA	Active
LM285Z-2.5/NOPB	Texas Instruments	±1.5%	150ppm/°C	-40°C ~ 85°C	20 µA	Active
LM285BYZ-2.5/NOPB	Texas Instruments	±1.5%	50ppm/°C	-40°C ~ 85°C	20 µA	Active
LM285BXZ-2.5/NOPB	National Semiconductor	±1.5%	30ppm/°C	-40°C ~ 85°C	20 µA	Active
LM285Z-2.5G	onsemi	±1.5%	80ppm/°C	-40°C ~ 85°C	30 µA	Active
LM385BZ-2.5G	onsemi	±1.5%	80ppm/°C	0°C ~ 70°C	30 µA	Active
LM385Z-2.5G	onsemi	±3%	80ppm/°C	0°C ~ 70°C	30 µA	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): Select LT1004CZ-2.5#PBF or LT1004CLPE3-2-5. Both maintain ±0.8% tolerance, 20ppm/°C temperature coefficient, and 0°C to 70°C operating range. LT1004CZ-2.5#PBF is manufactured by Analog Devices Inc. with active product status and ROHS3 compliance. LT1004CLPE3-2-5 is manufactured by Texas Instruments with active status and highest inventory availability (54,577 units).

For Extended Temperature Range with Maintained Tolerance: Select LT1004IZ-2.5#PBF. This part preserves the ±0.8% tolerance and 20ppm/°C temperature coefficient while extending operating range to -40°C to 85°C. Manufactured by Analog Devices Inc. with active status and ROHS3 compliance.

For Cost-Optimized Substitution with Acceptable Tolerance Trade-off: Select LM285Z-2.5/NOPB, LM285BYZ-2.5/NOPB, or LM285BXZ-2.5/NOPB. These parts relax tolerance to ±1.5% while maintaining 20 mA output current and TO-92-3 packaging. All offer extended temperature range (-40°C to 85°C) and active product status. LM285Z-2.5/NOPB provides highest inventory (16,908 units).

For Temperature-Matched Substitution: Select LM385BZ-2.5G for 0°C to 70°C applications. This onsemi part matches the original operating temperature range with ±1.5% tolerance and active status. Cathode current increases to 30 µA.

All recommended substitutes are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can LT1004CLP-2-5 be replaced with LM285Z-2.5/NOPB?

A: Yes, with tolerance consideration. Both parts deliver 2.5V fixed output at 20 mA in TO-92-3 packaging. LM285Z-2.5/NOPB relaxes tolerance from ±0.8% to ±1.5% and extends operating temperature to -40°C to 85°C. This substitution is valid for applications where ±1.5% tolerance is acceptable.

Q: What is the difference between LT1004CZ-2.5#PBF and LT1004IZ-2.5#PBF?

A: Both are Analog Devices Inc. LT1004 variants with identical ±0.8% tolerance and 20ppm/°C temperature coefficient. The primary difference is operating temperature: LT1004CZ-2.5#PBF operates 0°C to 70°C, while LT1004IZ-2.5#PBF extends to -40°C to 85°C. Select based on application temperature requirements.

Q: Are all substitute parts available in TO-92-3 packaging?

A: Yes. All listed substitutes use TO-92-3 (TO-226-3) through-hole packaging, ensuring mechanical and electrical compatibility with the original LT1004CLP-2-5 footprint.

Q: What is the impact of increased cathode current in LM285Z-2.5G and LM385BZ-2.5G?

A: These onsemi parts specify 30 µA cathode current versus 20 µA in the original. This represents a 50% increase in minimum operating current. Verify circuit design accommodates this requirement before substitution.

Q: Which substitute offers the best inventory availability?

A: LT1004CLPE3-2-5 (Texas Instruments) provides the highest stock at 54,577 units with active product status, ±0.8% tolerance, and identical electrical specifications to the obsolete LT1004CLP-2-5.

Q: Can LM385Z-2.5G be used as a direct replacement?

A: LM385Z-2.5G is not a direct replacement due to ±3% tolerance versus the original ±0.8%. Use only in applications where ±3% tolerance is acceptable. It maintains 2.5V output, 20 mA current, and TO-92-3 packaging.

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