LM285Z-2.5RPG Equivalent & Substitute Parts

Part Overview

The LM285Z-2.5RPG is a shunt voltage reference IC manufactured by onsemi, providing a fixed 2.5V output with ±1.5% tolerance. This through-hole component operates across the industrial temperature range of -40°C to 85°C and is classified as Active product status. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the same package type (TO-92-3) and functional parameters.

Key Parameters

Parameter	Value
Reference Type	Shunt
Output Type	Fixed
Voltage - Output (Min/Fixed)	2.5V
Current - Output	20 mA
Tolerance	±1.5%
Noise - 10Hz to 10kHz	120µVrms
Current - Cathode	30 µA
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Through Hole
Package / Case	TO-226-3, TO-92-3 (TO-226AA) Formed Leads
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following electrical and mechanical parameters:

Reference Type: Shunt
Output Voltage: 2.5V fixed
Output Tolerance: ±1.5%
Output Current: 20 mA
Noise Specification: 120µVrms (10Hz to 10kHz)
Package Type: TO-92-3 (TO-226-3)
Mounting: Through Hole with Formed Leads
RoHS Compliance: ROHS3 Compliant

Substitute parts are grouped into two categories: Direct Substitutes (identical electrical and mechanical specifications) and Similar Substitutes (equivalent core functionality with allowable parameter variations in temperature coefficient, cathode current, or operating temperature range).

Parameter Comparison

Part Number	Manufacturer	Voltage Output	Tolerance	Current Output	Cathode Current	Temp Coefficient	Operating Temp	Packaging	RoHS Status
LM285Z-2.5RPG	onsemi	2.5V	±1.5%	20 mA	30 µA	80ppm/°C	-40°C ~ 85°C	Cut Tape (CT)	ROHS3 Compliant
LM285LPR-2-5	Texas Instruments	2.5V	±1.5%	20 mA	20 µA	20ppm/°C	-40°C ~ 85°C	Cut Tape (CT)	ROHS3 Compliant
LM285LP-2-5	Texas Instruments	2.5V	±1.5%	20 mA	20 µA	20ppm/°C	-40°C ~ 85°C	Bulk	ROHS3 Compliant
LM285LPE3-2-5	Texas Instruments	2.5V	±1.5%	20 mA	20 µA	20ppm/°C	-40°C ~ 85°C	Bulk	ROHS3 Compliant
LM285LPRE3-2-5	Texas Instruments	2.5V	±1.5%	20 mA	20 µA	20ppm/°C	-40°C ~ 85°C	Cut Tape (CT)	ROHS3 Compliant
LM285Z-2.5#TRPBF	Analog Devices Inc.	2.5V	±1.5%	20 mA	20 µA	20ppm/°C	-40°C ~ 85°C	Tape & Reel (TR)	ROHS3 Compliant
LM285Z-2.5/LFT7	National Semiconductor	2.5V	±1.5%	20 mA	20 µA	150ppm/°C	-40°C ~ 85°C	Bulk	Not Specified
LM385BLP-2-5	Texas Instruments	2.5V	±1.5%	20 mA	20 µA	20ppm/°C	0°C ~ 70°C	Bulk	ROHS3 Compliant
LM385BLPE3-2-5	Texas Instruments	2.5V	±1.5%	20 mA	20 µA	20ppm/°C	0°C ~ 70°C	Bulk	ROHS3 Compliant
LM385BLPR-2-5	Texas Instruments	2.5V	±1.5%	20 mA	20 µA	20ppm/°C	0°C ~ 70°C	Cut Tape (CT)	ROHS3 Compliant
LM385BZ-2.5/LFT7	Texas Instruments	2.5V	±1.5%	20 mA	20 µA	150ppm/°C	0°C ~ 70°C	Cut Tape (CT)	ROHS3 Compliant

Engineering Selection Recommendations

LM285LPR-2-5 (Texas Instruments, Cut Tape) and LM285LPRE3-2-5 (Texas Instruments, Cut Tape) are direct electrical and mechanical equivalents to the LM285Z-2.5RPG, maintaining identical operating temperature range (-40°C to 85°C), output specifications, and ROHS3 compliance. Both are suitable for applications requiring industrial temperature operation.

LM285LP-2-5 and LM285LPE3-2-5 (Texas Instruments, Bulk packaging) provide equivalent electrical performance but differ in packaging format. These are appropriate for high-volume applications where bulk packaging is acceptable.

LM285Z-2.5#TRPBF (Analog Devices Inc., Tape & Reel) maintains full electrical equivalence and industrial temperature range with alternative packaging. ROHS3 compliance is confirmed.

LM385 series parts (LM385BLP-2-5, LM385BLPE3-2-5, LM385BLPR-2-5, LM385BZ-2.5/LFT7) are functionally equivalent but operate within a narrower temperature range (0°C to 70°C). These are suitable only for applications not requiring the full -40°C to 85°C industrial range.

LM285Z-2.5/LFT7 (National Semiconductor, Bulk) provides electrical equivalence across the full industrial temperature range but lacks specified RoHS certification status.

Frequently Asked Questions (FAQ)

Q: Can LM385 series parts directly replace the LM285Z-2.5RPG?

A: LM385 series parts are electrically equivalent but operate within a reduced temperature range (0°C to 70°C versus -40°C to 85°C). Use LM385 variants only if your application does not require operation below 0°C or above 70°C.

Q: What is the difference between Cut Tape and Bulk packaging?

A: Cut Tape (CT) packaging is supplied on individual tape strips suitable for automated pick-and-place assembly. Bulk packaging is supplied loose and is typically used for manual assembly or high-volume reel applications. Electrical performance is identical.

Q: Does packaging format affect electrical performance?

A: No. Packaging format (Cut Tape, Bulk, Tape & Reel) affects only handling, storage, and assembly methods. All variants maintain identical electrical specifications.

Q: Why does the LM285Z-2.5RPG have a higher cathode current (30 µA) than most substitutes (20 µA)?

A: Cathode current variation within the specified range does not affect functional equivalence. The 30 µA specification for the onsemi part remains within acceptable operating parameters for shunt voltage reference applications.

Q: Are all listed parts ROHS3 compliant?

A: Most listed parts are ROHS3 compliant. LM285Z-2.5/LFT7 (National Semiconductor) does not specify RoHS certification status. Verify compliance requirements for your specific application before selection.

Q: What is the significance of temperature coefficient differences?

A: Temperature coefficient (ppm/°C) indicates output voltage drift across the operating temperature range. Lower values (20ppm/°C) indicate better stability. Parts with 80ppm/°C or 150ppm/°C coefficients maintain the same ±1.5% tolerance specification and are functionally equivalent for applications within specified tolerance limits.

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