MAX4377FASA Current Sense Amplifier Equivalent & Substitute Parts

Part Overview

The MAX4377FASA is a dual-channel current sense amplifier manufactured by Analog Devices Inc./Maxim Integrated, designed for precision current measurement applications. This linear amplifier IC operates across a wide supply voltage range of 3V to 28V and features a 2 MHz bandwidth with 10V/µs slew rate. The device is classified as obsolete, which necessitates identification of active equivalent parts for new designs and ongoing production requirements. The MAX4377FASA is packaged in an 8-SOIC surface mount configuration with unlimited moisture sensitivity rating.

Substiute Parts

MAX4377FASA

Analog Devices Inc./Maxim IntegratedIn Stock: 2227MAX4377FASA Datasheet

Current PartRFQ

MAX4377FASA+

Analog Devices Inc./Maxim IntegratedIn Stock: 2385MAX4377FASA+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX4377FASA is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Amplifier type: Current Sense
• Number of circuits: 2 channels
• Slew rate: 10V/µs
• -3dB bandwidth: 2 MHz
• Input bias current: 120 µA
• Supply current per channel: 1 mA
• Supply voltage range: 3V to 28V minimum and maximum
• Operating temperature range: -40°C to 125°C

Mechanical Equivalence Criteria:

• Mounting type: Surface Mount
• Package type: 8-SOIC
• Package dimensions: 0.154" width (3.90mm)

The MAX4377FASA+ qualifies as a direct substitute because it maintains identical electrical specifications and mechanical packaging while offering improved product status and regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The MAX4377FASA+ is the direct functional and mechanical equivalent of the MAX4377FASA. Selection between these parts is determined by the following factors:

Product Status Consideration: The MAX4377FASA is classified as obsolete, indicating discontinued manufacturing and limited availability. The MAX4377FASA+ maintains active product status with confirmed inventory of 2300 pieces, ensuring supply chain continuity for new designs and production runs.

Regulatory Compliance: The MAX4377FASA carries RoHS non-compliant status, while the MAX4377FASA+ is ROHS3 compliant. For applications subject to RoHS directives or customer requirements mandating RoHS compliance, the MAX4377FASA+ is the required selection.

REACH and Export Classification: Both parts maintain identical REACH Unaffected status and EAR99 export classification, with matching HTSUS code 8542.33.0001.

Packaging and Handling: The MAX4377FASA+ is supplied in tube packaging, whereas the original part packaging format is not specified. Both parts maintain MSL 1 (Unlimited) moisture sensitivity rating, indicating no special storage or handling requirements.

Electrical and Mechanical Compatibility: Complete parameter equivalence across all electrical specifications and mechanical dimensions ensures direct pin-for-pin and functional substitution without circuit redesign or board layout modification.

Frequently Asked Questions (FAQ)

Q: Can MAX4377FASA+ be used as a direct replacement for MAX4377FASA in existing designs?

A: Yes. The MAX4377FASA+ is electrically and mechanically identical to the MAX4377FASA. All electrical parameters, including slew rate, bandwidth, supply voltage range, and operating temperature, are identical. The 8-SOIC package dimensions are unchanged, enabling direct PCB substitution without layout modification.

Q: What is the primary reason to transition from MAX4377FASA to MAX4377FASA+?

A: The MAX4377FASA is obsolete with limited inventory availability. The MAX4377FASA+ is an active product with confirmed stock, ensuring long-term supply chain reliability. Additionally, the MAX4377FASA+ achieves ROHS3 compliance, meeting modern regulatory requirements.

Q: Are there any differences in the 8-SOIC package between these parts?

A: No. Both parts use identical 8-SOIC packaging with 0.154" width (3.90mm). Pin configuration, lead spacing, and mechanical dimensions are unchanged, confirming full compatibility.

Q: What is the difference between the packaging formats listed for these parts?

A: The MAX4377FASA packaging format is not specified in available documentation. The MAX4377FASA+ is supplied in tube packaging, which is a standard format for surface mount components. This difference does not affect electrical performance or PCB assembly compatibility.

Q: Do both parts require identical PCB layout and thermal management?

A: Yes. Identical electrical specifications and package dimensions require no changes to PCB layout, thermal design, or circuit board assembly procedures. Existing designs using MAX4377FASA can accommodate MAX4377FASA+ without modification.

Q: What is the moisture sensitivity level for both parts?

A: Both parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity concerns. Standard handling and storage procedures are sufficient; no special desiccant packaging or baking procedures are required.

Q: Are there supply voltage or temperature range limitations that would prevent substitution?

A: No. Both parts operate identically across the 3V to 28V supply range and -40°C to 125°C temperature range. No application-specific limitations exist that would restrict substitution based on these parameters.