MAX4378FASD Equivalent & Substitute Parts

Part Overview

The MAX4378FASD is a current sense amplifier IC manufactured by Analog Devices Inc./Maxim Integrated, designed for precision current measurement applications. This device integrates four independent current sense circuits in a 14-SOIC surface mount package, operating across a supply voltage range of 3V to 28V with an operating temperature range of -40°C to 125°C.

The MAX4378FASD is classified as obsolete product status. Locating equivalent or substitute components becomes necessary when original stock is depleted or when design requirements mandate active product status for long-term supply chain assurance and manufacturing support.

Substiute Parts

MAX4378FASD

Analog Devices Inc./Maxim IntegratedIn Stock: 4672MAX4378FASD Datasheet

Current PartRFQ

MAX4378FASD+

Analog Devices Inc./Maxim IntegratedIn Stock: 911MAX4378FASD+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MAX4378FASD is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Amplifier type classification (Current Sense)
• Number of independent circuits (4)
• Slew rate performance (10 V/µs)
• Bandwidth specification (-3dB at 2 MHz)
• Input bias current (120 µA)
• Supply current per channel (1 mA x4)
• Supply voltage operating range (3V minimum, 28V maximum)
• Temperature operating range (-40°C to 125°C)

Mechanical Equivalence Criteria:

• Surface mount mounting type
• 14-SOIC package configuration with 0.154" (3.90mm) width specification

The MAX4378FASD+ qualifies as a direct substitute based on identical electrical performance specifications and mechanical package compatibility. The primary distinction between these parts is product status classification and packaging format.

Parameter Comparison

Engineering Selection Recommendations

MAX4378FASD+ Selection Basis:

The MAX4378FASD+ is the direct functional equivalent of the MAX4378FASD, offering identical electrical performance and mechanical compatibility. Selection of the MAX4378FASD+ is supported by the following engineering considerations:

Product Status: The MAX4378FASD+ maintains active product status with Analog Devices Inc./Maxim Integrated, ensuring continued manufacturing support, availability, and technical documentation access. The original MAX4378FASD is classified as obsolete, limiting future procurement reliability.

Regulatory Compliance: The MAX4378FASD+ achieves ROHS3 compliance, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution. The MAX4378FASD is RoHS non-compliant, which may present procurement restrictions in regulated markets and applications.

Electrical Performance: Both parts deliver identical specifications across all critical parameters: 10 V/µs slew rate, 2 MHz bandwidth, 120 µA input bias current, and 3V to 28V supply voltage range. No performance degradation occurs with substitution.

Mechanical Compatibility: Both parts utilize the 14-SOIC package with identical 0.154" (3.90mm) width specification, ensuring direct PCB layout compatibility without redesign requirements.

Packaging Consideration: The MAX4378FASD+ is supplied in tube packaging format, which is standard for active production components and facilitates automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can MAX4378FASD+ be used as a direct replacement for MAX4378FASD in existing designs?

A: Yes. The MAX4378FASD+ is electrically and mechanically equivalent to the MAX4378FASD. All electrical parameters, including slew rate, bandwidth, bias current, and supply voltage range, are identical. The 14-SOIC package dimensions are identical, requiring no PCB layout modifications.

Q: What is the primary difference between MAX4378FASD and MAX4378FASD+?

A: The primary differences are product status and regulatory compliance. The MAX4378FASD is obsolete and RoHS non-compliant. The MAX4378FASD+ is active product status and ROHS3 compliant. Electrical and mechanical specifications are identical.

Q: Why is product status important for component selection?

A: Active product status ensures continued manufacturing availability, technical support, and supply chain reliability. Obsolete components face potential discontinuation, limited stock availability, and reduced manufacturer support. For long-term production requirements, active status components are preferred.

Q: Are there packaging differences between these parts?

A: Yes. The MAX4378FASD uses standard packaging, while the MAX4378FASD+ uses tube packaging. Both are 14-SOIC format with identical dimensions. Tube packaging is standard for active production components and supports automated assembly processes.

Q: Does RoHS compliance affect electrical performance?

A: No. RoHS compliance relates to material composition and environmental standards, not electrical performance. Both parts deliver identical electrical specifications. ROHS3 compliance of the MAX4378FASD+ meets current regulatory requirements in many markets.

Q: What is the current supply specification for the MAX4378FASD?

A: The device draws 1 mA per channel across four independent circuits, totaling 4 mA maximum supply current under full operation across the 3V to 28V supply voltage range.

Q: Is the 14-SOIC package suitable for high-density PCB layouts?

A: Yes. The 14-SOIC package with 0.154" (3.90mm) width is a standard surface mount package suitable for modern PCB designs. Both MAX4378FASD and MAX4378FASD+ use identical package dimensions, ensuring compatibility with existing layouts.