LM285Z-1.2G Equivalent & Substitute Parts

Part Overview

The LM285Z-1.2G is a shunt voltage reference IC manufactured by onsemi, providing a fixed 1.235V output with ±1% tolerance in a TO-92-3 through-hole package. This component is classified as active product status and is compliant with ROHS3 and REACH regulations. Substitute parts are identified when electrical parameters and mechanical compatibility align within the specified tolerance and operating ranges, enabling direct replacement in circuit applications without redesign.

Key Parameters

Parameter	Value
Reference Type	Shunt
Output Type	Fixed
Voltage - Output (Min/Fixed)	1.235V
Current - Output	20 mA
Tolerance	±1%
Noise - 10Hz to 10kHz	60µVrms
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Through Hole
Package / Case	TO-226-3, TO-92-3 Long Body
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LM285Z-1.2G are classified based on strict alignment with the following electrical and mechanical criteria:

Primary Substitution Criteria:

Reference Type: Shunt
Output Type: Fixed
Voltage - Output: 1.235V (±0.3% to ±1% tolerance acceptable)
Current - Output: 20 mA
Package / Case: TO-226-3 or TO-92-3
Mounting Type: Through Hole
Operating Temperature Range: Must encompass or match -40°C ~ 85°C

Grouping Logic:

Direct Equivalents: Parts with identical electrical specifications and full temperature range (-40°C ~ 85°C)
Compatible Substitutes: Parts meeting all electrical criteria but with restricted temperature range (0°C ~ 70°C) or improved tolerance specifications
Enhanced Performance Alternatives: Parts with tighter tolerance (±0.3%) or lower temperature coefficient, suitable for applications requiring higher precision

Parameter Comparison

Part Number	Manufacturer	Voltage Output	Tolerance	Temp Coeff (ppm/°C)	Cathode Current (µA)	Operating Temp	Package	Status
LM285Z-1.2G	onsemi	1.235V	±1%	80	20	-40°C ~ 85°C	TO-92-3	Active
LM285LP-1-2	Texas Instruments	1.235V	±1%	20	10	-40°C ~ 85°C	TO-92-3	Active
LM285BXZ-1.2/NOPB	Texas Instruments	1.235V	±1%	30	10	-40°C ~ 85°C	TO-92-3	Active
LM285LPE3-1-2	Texas Instruments	1.235V	±1%	20	10	-40°C ~ 85°C	TO-92-3	Active
LM285Z-1.2#PBF	Analog Devices Inc.	1.235V	±1%	20	10	-40°C ~ 85°C	TO-92-3	Active
LM285Z-1.2/NOPB	Texas Instruments	1.235V	±1%	150	10	-40°C ~ 85°C	TO-92-3	Active
LM385BXZ-1.2/NOPB	Texas Instruments	1.235V	±1%	30	15	0°C ~ 70°C	TO-92-3	Active
LM385BYZ-1.2/NOPB	National Semiconductor	1.235V	±1%	50	15	0°C ~ 70°C	TO-92-3	Active
LM385BZ-1.2/NOPB	Texas Instruments	1.235V	±1%	150	15	0°C ~ 70°C	TO-92-3	Active
LT1004CZ-1.2#PBF	Analog Devices Inc.	1.235V	±0.3%	20	10	0°C ~ 70°C	TO-92-3	Active
LT1004IZ-1.2#PBF	Analog Devices Inc.	1.23V	±0.3%	20	10	-40°C ~ 85°C	TO-92-3	Active

Engineering Selection Recommendations

Full Temperature Range Equivalents (-40°C ~ 85°C): LM285LP-1-2, LM285BXZ-1.2/NOPB, LM285LPE3-1-2, LM285Z-1.2#PBF, LM285Z-1.2/NOPB, and LT1004IZ-1.2#PBF maintain the complete operating temperature specification of the LM285Z-1.2G. These parts are suitable for applications requiring extended temperature operation. All listed parts maintain ROHS3 compliance and active product status.

Restricted Temperature Range Substitutes (0°C ~ 70°C): LM385BXZ-1.2/NOPB, LM385BYZ-1.2/NOPB, LM385BZ-1.2/NOPB, and LT1004CZ-1.2#PBF operate within a narrower temperature band. These parts are applicable only to applications with operating temperatures between 0°C and 70°C. All maintain ROHS3 compliance and active status.

Enhanced Tolerance Alternatives: LT1004CZ-1.2#PBF and LT1004IZ-1.2#PBF offer ±0.3% tolerance compared to the ±1% specification of the LM285Z-1.2G, providing improved output voltage accuracy for precision reference applications. LT1004IZ-1.2#PBF additionally maintains the full -40°C ~ 85°C temperature range.

Frequently Asked Questions (FAQ)

Q: Can LM385 series parts directly replace LM285 series parts? A: LM385 and LM285 series parts share identical output voltage (1.235V), tolerance (±1%), and TO-92-3 packaging. However, LM385 parts typically operate within 0°C ~ 70°C temperature range, while LM285 parts support -40°C ~ 85°C. Substitution is valid only when the application temperature range does not exceed 0°C ~ 70°C.

Q: What is the difference between LT1004 and LM285/LM385 series? A: LT1004 series provides tighter tolerance (±0.3% versus ±1%) and lower temperature coefficient (20ppm/°C typical). LT1004CZ-1.2#PBF operates 0°C ~ 70°C, while LT1004IZ-1.2#PBF supports -40°C ~ 85°C. Selection depends on precision requirements and temperature operating range.

Q: Are all substitute parts ROHS3 compliant? A: All listed substitute parts maintain ROHS3 compliance and active product status, ensuring regulatory alignment with the original LM285Z-1.2G specification.

Q: Does cathode current variation affect substitution compatibility? A: Cathode current ranges from 10µA to 20µA across substitute parts. This parameter does not prevent substitution; however, circuit design must accommodate the specified cathode current for each part to ensure proper biasing and reference stability.

Q: What packaging considerations apply to these substitutes? A: All substitute parts use TO-226-3 or TO-92-3 through-hole packages with identical pinout and mechanical dimensions, enabling direct PCB replacement without layout modification.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message