MAX4081FASA Equivalent & Substitute Parts

Part Overview

The MAX4081FASA is a current sense amplifier manufactured by Analog Devices Inc./Maxim Integrated, designed for precision current measurement applications. This linear amplifier integrates one sensing circuit in an 8-SOIC surface mount package and operates across a wide supply voltage range of 4.5 V to 76 V.

The MAX4081FASA is classified as an obsolete product. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term production requirements for applications currently utilizing this component.

Substiute Parts

MAX4081FASA

Analog Devices Inc./Maxim IntegratedIn Stock: 912MAX4081FASA Datasheet

Current PartRFQ

MAX4081FASA+

Analog Devices Inc./Maxim IntegratedIn Stock: 1139MAX4081FASA+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MAX4081FASA is determined by strict equivalence across the following critical parameters:

Functional Parameters:

• Amplifier Type: Current Sense
• Number of Circuits: 1
• -3dB Bandwidth: 150 kHz
• Current - Input Bias: 5 µA
• Voltage - Input Offset: 100 µV
• Current - Supply: 103 µA

Electrical Parameters:

• Voltage - Supply Span (Min): 4.5 V
• Voltage - Supply Span (Max): 76 V
• Operating Temperature Range: -40°C to 125°C

Mechanical Parameters:

• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• REACH Status: REACH Unaffected

Substitute parts must match all parameters listed above to ensure functional and mechanical compatibility without design modification.

Parameter Comparison

Engineering Selection Recommendations

The MAX4081FASA+ serves as the direct substitute for the MAX4081FASA. Both parts are manufactured by Analog Devices Inc./Maxim Integrated and share identical electrical, functional, and mechanical specifications.

Key Distinction: The MAX4081FASA is classified as obsolete, while the MAX4081FASA+ maintains active product status. The MAX4081FASA+ is supplied in tube packaging, whereas the main part uses standard packaging.

Compliance Alignment: Both parts maintain ROHS3 compliance, REACH unaffected status, and MSL 1 (Unlimited) rating, ensuring regulatory and environmental compatibility across applications.

For new designs or production continuity, the MAX4081FASA+ is the appropriate selection due to its active product status and guaranteed long-term availability from the manufacturer.

Frequently Asked Questions (FAQ)

Q: Can MAX4081FASA+ be used as a direct replacement for MAX4081FASA?

A: Yes. The MAX4081FASA+ is a direct substitute. All electrical parameters, functional specifications, and mechanical dimensions are identical. The primary difference is product status (active vs. obsolete) and packaging format (tube vs. standard).

Q: Are there any pin configuration differences between these parts?

A: No. Both parts use the 8-SOIC package with identical pin assignments and mechanical dimensions (0.154", 3.90mm Width). No PCB layout modifications are required.

Q: What is the significance of the "+" designation in MAX4081FASA+?

A: The "+" designation indicates the active production variant supplied in tube packaging. The electrical and functional performance remains equivalent to the base MAX4081FASA.

Q: Are both parts RoHS compliant?

A: Yes. Both MAX4081FASA and MAX4081FASA+ are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the moisture sensitivity level for these components?

A: Both parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions during storage or handling.

Q: Can these parts operate across the full -40°C to 125°C temperature range?

A: Yes. Both parts are specified for operation across the complete -40°C to 125°C temperature range with identical performance characteristics.

Q: What supply voltage range do these amplifiers support?

A: Both parts operate across a supply voltage span of 4.5 V to 76 V, enabling use in wide-range power supply applications.