MAX471ESA+ Equivalent & Substitute Parts

Part Overview

The MAX471ESA+ is a current sense amplifier integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. This device is classified as a linear amplifier designed for single-circuit current sensing applications in 8-SOIC surface mount packaging. The MAX471ESA+ is currently listed as obsolete, which necessitates identification of functionally equivalent substitute components for ongoing design support and procurement continuity. The part operates across a 3V to 36V supply voltage range with a maximum supply current of 50µA and supports operating temperatures from -40°C to 85°C.

Substiute Parts

MAX471ESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 2149MAX471ESA+ 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 critical parameters:

Mandatory Compatibility Criteria:

• Amplifier Type: Current Sense (single function requirement)
• Number of Circuits: 1 (single-channel configuration)
• Package / Case: 8-SOIC (0.154", 3.90mm Width) (physical and electrical pin compatibility)
• Mounting Type: Surface Mount (assembly process compatibility)
• Operating Temperature Range: -40°C to 85°C (environmental specification match)
• Voltage - Supply Span: Minimum 3V, Maximum ≥36V (power supply compatibility)

Compliance Requirements:

• RoHS3 Compliant status
• Moisture Sensitivity Level: 1 (Unlimited)

The MAX4172ESA+ meets all mandatory compatibility criteria and is classified as the manufacturer-recommended substitute. This device maintains identical package geometry, pin configuration, and operating temperature specifications while providing active product status and enhanced electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

MAX4172ESA+ as Primary Substitute:

The MAX4172ESA+ is the manufacturer-recommended equivalent for the obsolete MAX471ESA+. This substitution is supported by:

1. Identical Physical Interface: Both devices utilize the 8-SOIC package with 0.154" (3.90mm) width, ensuring direct pin-compatible replacement without PCB redesign.

2. Functional Equivalence: Both are single-circuit current sense amplifiers with matching amplifier type classification and circuit count.

3. Operating Specification Alignment: Identical operating temperature range (-40°C to 85°C) and minimum supply voltage (3V) ensure compatibility with existing thermal and power management designs. The MAX4172ESA+ maximum supply voltage of 32V accommodates the majority of applications designed for the 36V maximum of the MAX471ESA+.

4. Regulatory Compliance: Both devices maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, satisfying environmental and reliability requirements.

5. Active Product Status: The MAX4172ESA+ is classified as active, ensuring long-term availability, manufacturing support, and supply chain continuity compared to the obsolete MAX471ESA+.

Supply Current Consideration:

The MAX4172ESA+ exhibits higher supply current consumption (800µA versus 50µA). This parameter difference must be evaluated within the context of the specific application's power budget and thermal design. Applications with strict power consumption constraints require detailed analysis of the impact on system-level power dissipation.

Frequently Asked Questions (FAQ)

Q: Can the MAX4172ESA+ be used as a direct replacement for the MAX471ESA+ without PCB modifications?

A: Yes. Both devices share identical 8-SOIC package geometry and pin configuration. Direct substitution on existing PCBs is physically feasible without layout changes.

Q: What is the primary difference between the MAX471ESA+ and MAX4172ESA+?

A: The MAX4172ESA+ is the active successor to the obsolete MAX471ESA+. Key differences include higher supply current (800µA vs. 50µA), slightly lower maximum supply voltage (32V vs. 36V), and enhanced electrical performance specifications including -3dB bandwidth (800 kHz), input bias current (50µA), and input offset voltage (1mV).

Q: Are there any compliance or certification differences between these parts?

A: No. Both devices maintain identical RoHS3 compliance status and MSL Level 1 (Unlimited) moisture sensitivity rating. Regulatory and environmental certifications are equivalent.

Q: What applications are affected by the higher supply current of the MAX4172ESA+?

A: Applications with power budgets below 800µA supply current or designs optimized for ultra-low power consumption may require system-level power analysis. The 16x increase in supply current (50µA to 800µA) impacts total system power dissipation and may necessitate thermal management review in battery-powered or energy-constrained applications.

Q: Is the maximum supply voltage difference (36V vs. 32V) a limiting factor for substitution?

A: For applications operating at or near 36V, the MAX4172ESA+ maximum rating of 32V represents a constraint. Applications with supply voltages between 32V and 36V require design verification to confirm compatibility. Applications operating below 32V are unaffected.

Q: What is the inventory status for these parts?

A: The MAX471ESA+ has 2100 pieces in stock (new original). The MAX4172ESA+ has 2698 pieces in stock (new original, tube packaging). Availability should be confirmed with the supplier for production requirements.