MAX471ESA Equivalent & Substitute Parts

Part Overview

The MAX471ESA is a current sense amplifier integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. This device functions as a single-circuit current sensing solution in an 8-SOIC surface mount package. The MAX471ESA is classified as an obsolete product, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement requirements. Current sense amplifiers are critical components in power management, battery monitoring, and load measurement applications where precise current detection is required.

Substiute Parts

MAX471ESA

Analog Devices Inc./Maxim IntegratedIn Stock: 4482MAX471ESA Datasheet

Current PartRFQ

MAX4172ESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 2781MAX4172ESA+ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX471ESA is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Amplifier Type: Current Sense (single circuit configuration)
• Package Type: 8-SOIC surface mount form factor
• Supply Voltage Range: Minimum 3V, Maximum 32V or higher
• Operating Temperature Range: -40°C to 85°C
• Mounting Technology: Surface Mount

The MAX4172ESA+ qualifies as a direct substitute based on identical package geometry, matching amplifier classification, overlapping supply voltage specifications, and identical operating temperature range. Both devices are manufactured by Analog Devices Inc./Maxim Integrated and maintain the same 8-SOIC pinout compatibility.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The MAX471ESA is classified as obsolete, while the MAX4172ESA+ maintains active product status. Active status ensures continued manufacturer support, availability through authorized distribution channels, and compliance with current regulatory requirements.

Regulatory Compliance: The MAX4172ESA+ is ROHS3 compliant, whereas the MAX471ESA is RoHS non-compliant. For applications subject to RoHS directives or customer specifications requiring RoHS compliance, the MAX4172ESA+ is the appropriate selection.

Supply Voltage Specification: The MAX471ESA supports supply voltages up to 36V maximum. The MAX4172ESA+ supports up to 32V maximum. Applications requiring operation above 32V require verification that the design operates within the MAX4172ESA+ specification envelope.

Supply Current Differential: The MAX4172ESA+ draws 800µA supply current compared to 50µA for the MAX471ESA. Power budget analysis is necessary for battery-powered or low-power applications where this 16-fold increase in quiescent current may impact system performance.

Package and Pinout Compatibility: Both devices utilize identical 8-SOIC packaging with 0.154-inch width (3.90mm). PCB layout and footprint compatibility is maintained without modification.

Frequently Asked Questions (FAQ)

Q: Can the MAX4172ESA+ directly replace the MAX471ESA in existing designs?

A: Mechanical and electrical compatibility exists for package and pinout. However, the increased supply current (800µA vs. 50µA) and reduced maximum supply voltage (32V vs. 36V) require circuit-level verification. Applications operating above 32V supply voltage cannot use the MAX4172ESA+ as a substitute.

Q: What is the significance of the RoHS compliance difference?

A: The MAX471ESA is RoHS non-compliant, while the MAX4172ESA+ is ROHS3 compliant. RoHS compliance is mandatory for products sold into European markets and for many OEM customers. New designs should specify the MAX4172ESA+ to meet current regulatory requirements.

Q: Are there any thermal or performance differences between these devices?

A: The MAX4172ESA+ includes specified -3dB bandwidth (800 kHz), input bias current (50 µA), and input offset voltage (1 mV) parameters. These specifications are not provided for the MAX471ESA in the available data. Detailed datasheets must be consulted for complete performance comparison.

Q: What is the impact of the supply current increase on system design?

A: The MAX4172ESA+ requires 16 times more supply current (800µA) than the MAX471ESA (50µA). In battery-powered applications or systems with strict power budgets, this increase may require power supply redesign or alternative component selection.

Q: Is the 8-SOIC package suitable for automated assembly?

A: Yes. Both the MAX471ESA and MAX4172ESA+ use standard 8-SOIC surface mount packaging compatible with automated pick-and-place assembly equipment and standard reflow soldering processes.

Q: What should be verified before implementing the MAX4172ESA+ as a substitute?

A: Verify that the application supply voltage does not exceed 32V. Confirm that the increased supply current consumption (800µA) is acceptable within the system power budget. Review detailed device datasheets for functional and performance specifications not included in this reference.