AD1580ART-REEL Equivalent & Substitute Parts

Part Overview

The AD1580ART-REEL is a shunt voltage reference IC manufactured by Analog Devices Inc., designed for precision power management applications. This component provides a fixed 1.225V output with ±0.82% tolerance and 10 mA output current in a compact SOT-23-3 surface mount package. The part is currently listed as obsolete, making equivalent and substitute parts essential for ongoing system support and new design implementations. Active alternatives with comparable or enhanced specifications are available from Analog Devices Inc. and Maxim Integrated product lines.

Key Parameters

Parameter	Value
Manufacturer Part Number	AD1580ART-REEL
Manufacturer	Analog Devices Inc.
Category	Power Management (PMIC)
Reference Type	Shunt
Output Type	Fixed
Voltage - Output (Fixed)	1.225V
Current - Output	10 mA
Tolerance	±0.82%
Temperature Coefficient	100ppm/°C
Operating Temperature Range	-40°C ~ 85°C (TA)
Package / Case	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the AD1580ART-REEL is determined by the following critical parameters:

Primary Substitution Criteria:

Fixed output voltage of 1.225V
Shunt reference type
SOT-23-3 package compatibility
Surface mount technology
Operating temperature range compatibility (-40°C ~ 85°C minimum)

Secondary Compatibility Factors:

Output current capability (minimum 10 mA required)
Voltage tolerance (±0.82% or better)
Temperature coefficient performance
Noise specifications (10Hz to 10kHz: 20µVrms or better)
Cathode current requirements

Substitute parts are grouped into two categories: direct equivalents from the same manufacturer (AD1580 series variants) and functionally compatible alternatives from the LM4041, LM4051, and MAX6138 product families that meet or exceed the electrical specifications of the original part.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Tolerance	Temp Coeff	Temp Range	Package	Status
AD1580ART-REEL	Analog Devices	1.225V	10 mA	±0.82%	100ppm/°C	-40°C ~ 85°C	SOT-23-3	Obsolete
AD1580ARTZ-REEL7	Analog Devices	1.225V	10 mA	±0.82%	100ppm/°C	-40°C ~ 85°C	SOT-23-3	Active
LM4041AEM3-1.2+T	Maxim Integrated	1.225V	12 mA	±0.1%	100ppm/°C	-40°C ~ 125°C	SOT-23-3	Active
LM4041AIM3-1.2+T	Maxim Integrated	1.225V	20 mA	±0.1%	100ppm/°C	-40°C ~ 85°C	SOT-23-3	Active
LM4041BEM3-1.2+T	Maxim Integrated	1.225V	Not specified	Not specified	Not specified	Not specified	SOT-23-3	Active
LM4041BIM3-1.2+T	Maxim Integrated	1.225V	20 mA	±0.2%	100ppm/°C	-40°C ~ 85°C	SOT-23-3	Active
LM4041DIM3-1.2+T	Maxim Integrated	1.225V	12 mA	±1%	150ppm/°C	-40°C ~ 85°C	SOT-23-3	Active
LM4051BEM3-1.2+T	Maxim Integrated	1.225V	15 mA	±0.2%	50ppm/°C	-40°C ~ 125°C	SOT-23-3	Active
MAX6138BEXR12+T	Maxim Integrated	1.2205V	15 mA	±0.2%	25ppm/°C	-40°C ~ 85°C	SC-70-3	Active

Engineering Selection Recommendations

Direct Replacement (Recommended for Obsolete Part Mitigation):

AD1580ARTZ-REEL7 is the direct equivalent to AD1580ART-REEL with identical electrical specifications and packaging. This part is currently in active production status with 42,413 units in stock, making it the primary choice for replacing the obsolete AD1580ART-REEL. Both parts are ROHS3 compliant and REACH unaffected, ensuring regulatory compliance continuity.

Enhanced Tolerance Alternatives (SOT-23-3 Package):

LM4041AEM3-1.2+T and LM4041AIM3-1.2+T offer superior tolerance performance (±0.1% versus ±0.82%) while maintaining 1.225V output and SOT-23-3 packaging. LM4041AEM3-1.2+T provides 12 mA output current with extended temperature range (-40°C ~ 125°C), while LM4041AIM3-1.2+T delivers 20 mA output current. Both are ROHS3 compliant and actively produced.

LM4051BEM3-1.2+T combines enhanced tolerance (±0.2%), superior temperature coefficient (50ppm/°C), extended operating range (-40°C ~ 125°C), and higher output current (15 mA) in SOT-23-3 packaging. This part provides the best overall performance characteristics for demanding applications.

Alternative Package Consideration:

MAX6138BEXR12+T provides equivalent functionality with the lowest temperature coefficient (25ppm/°C) and ±0.2% tolerance but uses SC-70-3 packaging instead of SOT-23-3. This part is suitable only for designs where SC-70-3 footprint compatibility exists.

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

Frequently Asked Questions (FAQ)

Q: Can AD1580ARTZ-REEL7 directly replace AD1580ART-REEL in existing designs?

A: Yes. AD1580ARTZ-REEL7 is electrically and mechanically identical to AD1580ART-REEL, with the same 1.225V output, ±0.82% tolerance, 10 mA output current, and SOT-23-3 package. The primary difference is product status (active versus obsolete) and packaging format (Digi-Reel versus standard reel). No circuit modifications are required.

Q: What are the key differences between LM4041 and LM4051 series parts?

A: The LM4041 series offers tolerance options from ±0.1% to ±1% with temperature coefficients of 100ppm/°C or 150ppm/°C. The LM4051 series provides tighter tolerance (±0.2%) with superior temperature coefficient performance (50ppm/°C). Both maintain 1.225V output and SOT-23-3 packaging. Selection depends on application requirements for accuracy and thermal stability.

Q: Is the MAX6138BEXR12+T compatible with existing AD1580ART-REEL PCB layouts?

A: No. MAX6138BEXR12+T uses SC-70-3 packaging, which has a different footprint than the SOT-23-3 package of AD1580ART-REEL. PCB layout modifications are required. This part is suitable only for new designs or boards with SC-70-3 footprint availability.

Q: What output current capability should I consider when selecting a substitute?

A: The original AD1580ART-REEL provides 10 mA output current. All recommended substitutes meet or exceed this specification. LM4041AIM3-1.2+T and LM4041BIM3-1.2+T deliver 20 mA, while LM4051BEM3-1.2+T provides 15 mA. Higher output current capability does not negatively impact designs requiring lower current; select based on application requirements and available inventory.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All recommended substitute parts (AD1580ARTZ-REEL7, LM4041 series, LM4051 series, and MAX6138BEXR12+T) are ROHS3 compliant and REACH unaffected, ensuring compatibility with modern manufacturing and environmental regulations.

Q: What is the significance of temperature coefficient differences?

A: Temperature coefficient indicates voltage drift per degree Celsius change. Lower values indicate better thermal stability. AD1580ART-REEL has 100ppm/°C. LM4051BEM3-1.2+T offers superior performance at 50ppm/°C, while MAX6138BEXR12+T provides the best performance at 25ppm/°C. Select based on application sensitivity to temperature-induced voltage variations.

Q: Can I use LM4041DIM3-1.2+T as a substitute despite its ±1% tolerance?

A: LM4041DIM3-1.2+T meets the minimum functional requirements (1.225V output, 12 mA current, SOT-23-3 package, -40°C ~ 85°C range) but has wider tolerance (±1% versus ±0.82%) and higher temperature coefficient (150ppm/°C versus 100ppm/°C). Use only in applications where these relaxed specifications are acceptable.

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