LM4050AEM3X-5.0 Equivalent & Substitute Parts

Part Overview

The LM4050AEM3X-5.0 is a shunt voltage reference IC with fixed 5V output, ±0.1% tolerance, and 15 mA output current in SOT-23-3 surface mount packaging. This part is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for production and repair applications. Substitute parts maintain the same electrical performance characteristics while offering improved availability or compliance status.

Key Parameters

Parameter	Value
Reference Type	Shunt
Output Type	Fixed
Voltage - Output (Min/Fixed)	5V
Current - Output	15 mA
Tolerance	±0.1%
Temperature Coefficient	50ppm/°C
Noise - 10Hz to 10kHz	93µVrms
Current - Cathode	90 µA
Operating Temperature	-40°C ~ 125°C (TA)
Package / Case	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts are grouped based on strict electrical and mechanical parameter compatibility with the LM4050AEM3X-5.0. The primary substitution criteria are:

Critical Parameters for Substitution:

Reference Type: Shunt
Output Type: Fixed
Voltage - Output: 5V
Current - Output: 15 mA
Package / Case: TO-236-3, SC-59, SOT-23-3
Mounting Type: Surface Mount
Operating Temperature Range: -40°C ~ 125°C (TA)

Tolerance Grouping: Parts with ±0.1% tolerance are direct parametric equivalents. Parts with ±0.5% tolerance (LM4050QAEM3-5.0/NOPB, LM4050QAEM3X5.0/NOPB) are parametric equivalents with relaxed tolerance specifications.

Compliance Grouping:

RoHS3 Compliant parts: LM4050AEM3X-5.0/NOPB, LM4050AEM3-5.0/NOPB, LM4050QAEM3-5.0/NOPB, LM4050QAEM3X5.0/NOPB, TL4050A50QDBZR, TL4050A50QDBZRQ1, TL4050A50QDBZT, LM4040AEM3-5.0+T, LM4050AEM3-5.0+T
Automotive Grade (AEC-Q100): LM4050QAEM3-5.0/NOPB, LM4050QAEM3X5.0/NOPB, TL4050A50QDBZRQ1, LM4040AEM3-5.0+T, LM4050AEM3-5.0+T

Product Status Grouping:

Active Status: All substitute parts except ADR5045ARTZ-R2
Discontinued: ADR5045ARTZ-R2

Parameter Comparison

Part Number	Manufacturer	Product Status	Tolerance	Temp Coeff (ppm/°C)	Noise 10Hz-10kHz	Cathode Current (µA)	RoHS Status	Packaging	Grade
LM4050AEM3X-5.0	Texas Instruments	Obsolete	±0.1%	50	93µVrms	90	RoHS non-compliant	Bulk	Commercial
LM4050AEM3X-5.0/NOPB	Texas Instruments	Active	±0.1%	50	93µVrms	90	ROHS3 Compliant	Tape & Reel (TR)	Commercial
LM4050AEM3-5.0/NOPB	Texas Instruments	Active	±0.1%	50	93µVrms	90	ROHS3 Compliant	Tape & Reel (TR)	Commercial
LM4050QAEM3-5.0/NOPB	Texas Instruments	Active	±0.1%	50	93µVrms	90	ROHS3 Compliant	Cut Tape (CT) & Digi-Reel®	Automotive (AEC-Q100)
LM4050QAEM3X5.0/NOPB	Texas Instruments	Active	±0.1%	50	93µVrms	90	ROHS3 Compliant	Tape & Reel (TR)	Automotive (AEC-Q100)
TL4050A50QDBZR	Texas Instruments	Active	±0.1%	50	93µVrms	90	ROHS3 Compliant	Tape & Reel (TR)	Commercial
TL4050A50QDBZRQ1	Texas Instruments	Active	±0.1%	50	93µVrms	90	ROHS3 Compliant	Tape & Reel (TR)	Automotive (AEC-Q100)
TL4050A50QDBZT	Texas Instruments	Active	±0.1%	50	93µVrms	90	ROHS3 Compliant	Cut Tape (CT) & Digi-Reel®	Commercial
LM4040AEM3-5.0+T	Analog Devices Inc./Maxim Integrated	Active	±0.1%	100	80µVrms	80	ROHS3 Compliant	Cut Tape (CT) & Digi-Reel®	Automotive (AEC-Q100)
LM4050AEM3-5.0+T	Analog Devices Inc./Maxim Integrated	Active	±0.1%	50	80µVrms	80	ROHS3 Compliant	Tape & Reel (TR)	Automotive (AEC-Q100)
ADR5045ARTZ-R2	Analog Devices Inc.	Discontinued at DiGi Electronics	±0.2%	100	280µVrms	60	Not specified	Bulk	Commercial

Engineering Selection Recommendations

Direct Replacement (Identical Electrical Performance): LM4050AEM3X-5.0/NOPB and LM4050AEM3-5.0/NOPB are direct replacements with active product status and RoHS3 compliance. These parts maintain all electrical specifications of the obsolete LM4050AEM3X-5.0 while offering improved compliance and availability.

Automotive-Grade Alternatives: LM4050QAEM3-5.0/NOPB, LM4050QAEM3X5.0/NOPB, TL4050A50QDBZRQ1, LM4040AEM3-5.0+T, and LM4050AEM3-5.0+T are AEC-Q100 qualified automotive-grade parts. These are suitable for applications requiring automotive qualification or enhanced reliability standards.

Texas Instruments TL4050 Series: TL4050A50QDBZR, TL4050A50QDBZRQ1, and TL4050A50QDBZT maintain identical electrical specifications with active product status and RoHS3 compliance. Packaging options include Tape & Reel and Cut Tape & Digi-Reel formats.

Analog Devices LM4040 Series: LM4040AEM3-5.0+T offers improved noise performance (80µVrms vs. 93µVrms) and lower cathode current (80µA vs. 90µA) with automotive qualification. This part is suitable for noise-sensitive applications.

Not Recommended: ADR5045ARTZ-R2 has relaxed tolerance (±0.2%), higher noise (280µVrms), and discontinued status. This part is not suitable as a primary replacement.

Frequently Asked Questions (FAQ)

Q: Can LM4050AEM3X-5.0/NOPB directly replace the obsolete LM4050AEM3X-5.0? A: Yes. LM4050AEM3X-5.0/NOPB is a direct replacement with identical electrical specifications (5V output, ±0.1% tolerance, 15 mA output current, 50ppm/°C temperature coefficient, 93µVrms noise). The primary difference is active product status and RoHS3 compliance.

Q: What is the difference between LM4050AEM3X-5.0/NOPB and LM4050AEM3-5.0/NOPB? A: Both parts are electrically identical with the same specifications. The difference is in the part number designation. Both are active, RoHS3 compliant, and available in Tape & Reel packaging.

Q: Are automotive-grade parts (AEC-Q100) required for this application? A: Automotive-grade qualification is not required unless your application specifically demands it. Commercial-grade parts (LM4050AEM3X-5.0/NOPB, TL4050A50QDBZR) are suitable for standard industrial and consumer applications. Automotive-grade alternatives are available if enhanced reliability or automotive standards compliance is necessary.

Q: What is the difference between Tape & Reel and Cut Tape & Digi-Reel packaging? A: Tape & Reel (TR) packaging is supplied on continuous tape for automated assembly. Cut Tape (CT) & Digi-Reel® packaging is supplied in smaller quantities on cut tape segments. Both formats contain identical components; the choice depends on production volume and assembly equipment compatibility.

Q: Can LM4040AEM3-5.0+T replace LM4050AEM3X-5.0? A: LM4040AEM3-5.0+T is a parametric equivalent with improved noise performance (80µVrms vs. 93µVrms) and lower cathode current (80µA vs. 90µA). It maintains the same 5V output, ±0.1% tolerance, and 15 mA output current. This part is suitable for noise-sensitive applications and includes automotive qualification.

Q: Why is ADR5045ARTZ-R2 listed as not recommended? A: ADR5045ARTZ-R2 has relaxed tolerance (±0.2% vs. ±0.1%), significantly higher noise (280µVrms vs. 93µVrms), lower output current capability (60µA cathode current vs. 90µA), and discontinued product status. These differences make it unsuitable as a direct replacement.

Q: Are all substitute parts RoHS3 compliant? A: All active substitute parts listed are RoHS3 compliant except ADR5045ARTZ-R2, which has unspecified RoHS status and discontinued product status. The original LM4050AEM3X-5.0 is RoHS non-compliant.

Q: What is the temperature coefficient difference between parts? A: Most parts have 50ppm/°C temperature coefficient. LM4040AEM3-5.0+T and ADR5045ARTZ-R2 have 100ppm/°C. For applications requiring minimal temperature drift, parts with 50ppm/°C are preferred.

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