LM4050AIM3-5.0 Equivalent & Substitute Parts

Part Overview

The LM4050AIM3-5.0 is a shunt voltage reference IC from Texas Instruments, providing a fixed 5V output with ±0.1% tolerance in a SOT-23-3 surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and production continuity. The device operates across -40°C to 85°C and delivers 15 mA output current with 50 ppm/°C temperature coefficient.

Key Parameters

Parameter	Value
Reference Type	Shunt
Output Type	Fixed
Voltage - Output	5V
Current - Output	15 mA
Tolerance	±0.1%
Temperature Coefficient	50 ppm/°C
Noise - 10Hz to 10kHz	93 µVrms
Current - Cathode	80 µA
Operating Temperature	-40°C ~ 85°C
Package / Case	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Output voltage matching at 5V fixed
Output current capability of 15 mA minimum
Tolerance specification of ±0.1% or better
SOT-23-3 package compatibility
Surface mount mounting type
Operating temperature range covering -40°C to 85°C minimum
RoHS3 compliance

Parts are grouped into three categories: parametric equivalents (identical electrical specifications), direct manufacturer alternatives (same base functionality with minor specification variations), and manufacturer-recommended substitutes (enhanced specifications or extended temperature ranges).

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Tolerance	Temp Coefficient	Noise 10Hz-10kHz	Cathode Current	Operating Temp	Product Status
LM4050AIM3-5.0	Texas Instruments	5V	15 mA	±0.1%	50 ppm/°C	93 µVrms	80 µA	-40°C ~ 85°C	Obsolete
LM4050AIM3-5.0/NOPB	Texas Instruments	5V	15 mA	±0.1%	50 ppm/°C	93 µVrms	80 µA	-40°C ~ 85°C	Active
LM4050AIM3X-5.0/NOPB	Texas Instruments	5V	15 mA	±0.1%	50 ppm/°C	93 µVrms	80 µA	-40°C ~ 85°C	Active
TL4050A50IDBZR	Texas Instruments	5V	15 mA	±0.1%	50 ppm/°C	93 µVrms	80 µA	-40°C ~ 85°C	Active
TL4050A50IDBZT	Texas Instruments	5V	15 mA	±0.1%	50 ppm/°C	93 µVrms	80 µA	-40°C ~ 85°C	Active
LM4040AIM3-5.0+T	Analog Devices Inc./Maxim Integrated	5V	15 mA	±0.1%	100 ppm/°C	80 µVrms	80 µA	-40°C ~ 85°C	Active
ADR5045ARTZ-R2	Analog Devices Inc.	5V	15 mA	±0.2%	100 ppm/°C	280 µVrms	60 µA	-40°C ~ 125°C	Discontinued at DiGi Electronics
ADR5045ARTZ-REEL7	Analog Devices Inc.	5V	15 mA	±0.2%	100 ppm/°C	280 µVrms	60 µA	-40°C ~ 125°C	Active
ADR5045BRTZ-REEL7	Analog Devices Inc.	5V	15 mA	±0.1%	75 ppm/°C	280 µVrms	60 µA	-40°C ~ 125°C	Active
LM4040AEM3-5.0+T	Analog Devices Inc./Maxim Integrated	5V	15 mA	±0.1%	100 ppm/°C	80 µVrms	80 µA	-40°C ~ 125°C	Active
LM4040B50FTA	Diodes Incorporated	5V	15 mA	±0.2%	100 ppm/°C	80 µVrms	83 µA	-40°C ~ 125°C	Active

Engineering Selection Recommendations

Tier 1 - Direct Parametric Equivalents (Preferred for Drop-In Replacement)

LM4050AIM3-5.0/NOPB, LM4050AIM3X-5.0/NOPB, TL4050A50IDBZR, and TL4050A50IDBZT are parametric equivalents from Texas Instruments with identical electrical specifications. All are active products with ROHS3 compliance. These parts provide the most direct substitution path with no design modifications required.

Tier 2 - Compatible Alternatives with Extended Temperature Range

LM4040AEM3-5.0+T and ADR5045BRTZ-REEL7 maintain ±0.1% tolerance and SOT-23-3 packaging while extending operating temperature to -40°C ~ 125°C. LM4040AEM3-5.0+T includes AEC-Q100 automotive qualification. These parts are suitable when extended temperature performance is beneficial.

Tier 3 - Functional Substitutes with Relaxed Tolerance

ADR5045ARTZ-REEL7 and LM4040B50FTA provide ±0.2% tolerance with extended temperature ranges. These parts maintain 5V output and 15 mA current but accept wider tolerance specifications. Selection depends on circuit tolerance requirements.

All recommended substitutes maintain SOT-23-3 package compatibility, surface mount mounting, and ROHS3 compliance status.

Frequently Asked Questions (FAQ)

Q: Can LM4050AIM3-5.0/NOPB directly replace the obsolete LM4050AIM3-5.0?

A: Yes. LM4050AIM3-5.0/NOPB is a parametric equivalent with identical electrical specifications, tolerance, temperature coefficient, and noise characteristics. The only difference is packaging format (Tape & Reel vs. Cut Tape). No circuit modifications are required.

Q: What is the difference between LM4050 and TL4050 series parts?

A: Both are Texas Instruments shunt voltage reference ICs with identical 5V output, 15 mA current, and ±0.1% tolerance. The TL4050A50IDBZR and TL4050A50IDBZT variants are functionally equivalent to the LM4050 series and can be used interchangeably in the same application.

Q: Are Analog Devices ADR5045 parts suitable replacements?

A: ADR5045BRTZ-REEL7 is suitable as it maintains ±0.1% tolerance and extends operating temperature to 125°C. ADR5045ARTZ-REEL7 has relaxed ±0.2% tolerance and is suitable only if circuit design permits wider tolerance. Both use SOT-23-3 packaging and are ROHS3 compliant.

Q: What is the impact of different temperature coefficients?

A: The original LM4050AIM3-5.0 has 50 ppm/°C. Alternatives with 75 ppm/°C or 100 ppm/°C will exhibit greater output voltage drift across temperature. Selection depends on circuit sensitivity to reference voltage variation over the operating temperature range.

Q: Can I use parts with ±0.2% tolerance instead of ±0.1%?

A: Only if circuit design specifications permit the wider tolerance. Parts like LM4040B50FTA and ADR5045ARTZ-REEL7 with ±0.2% tolerance are functionally compatible but will have greater initial accuracy variation. Verify tolerance requirements before substitution.

Q: Are all substitute parts available in the same packaging?

A: All listed substitutes use SOT-23-3 surface mount packaging. Packaging format variations (Cut Tape vs. Tape & Reel) do not affect electrical compatibility, only procurement and handling methods.

Q: What is the significance of the /NOPB designation?

A: /NOPB indicates "No Plumbum" (lead-free) RoHS3 compliance. This is a manufacturing designation and does not affect electrical performance or compatibility.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message