MAX4285ESA+ Equivalent & Substitute Parts Reference

Part Overview

The MAX4285ESA+ is a buffer and voltage feedback amplifier IC manufactured by Analog Devices Inc./Maxim Integrated, housed in an 8-SOIC surface mount package. This component is classified as obsolete, with 820 pieces currently in stock. The MAX4285ESA+ delivers a slew rate of 385 V/µs and operates across a -40°C to 85°C temperature range with a supply voltage span of 2.85 V to 6.5 V.

Due to its obsolete product status, identifying equivalent substitute parts is essential for design continuity, long-term component availability, and supply chain reliability. Active alternative components with compatible electrical and mechanical specifications are available from Analog Devices Inc.

Key Parameters

Parameter	MAX4285ESA+
Manufacturer	Analog Devices Inc./Maxim Integrated
Product Status	Obsolete
Amplifier Type	Buffer, Voltage Feedback
Number of Circuits	1
Slew Rate	385 V/µs
-3dB Bandwidth	250 MHz
Current - Input Bias	13 µA
Voltage - Input Offset	100 µV
Current - Supply	23 mA
Current - Output / Channel	106 mA
Voltage - Supply Span (Min)	2.85 V
Voltage - Supply Span (Max)	6.5 V
Operating Temperature	-40°C to 85°C
Package / Case	8-SOIC (0.154", 3.90 mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the MAX4285ESA+ are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Electrical Compatibility Criteria:

Amplifier Type: Voltage Feedback configuration
Number of Circuits: Single circuit (1)
Package / Case: 8-SOIC form factor with 0.154" (3.90 mm) width
Operating Temperature Range: -40°C to 85°C minimum
Mounting Type: Surface Mount

Compliance & Certification Criteria:

RoHS3 Compliance
Moisture Sensitivity Level: 1 (Unlimited)
ECCN: EAR99
HTSUS: 8542.33.0001

The substitute parts AD8038ARZ, AD8038ARZ-REEL, and AD8038ARZ-REEL7 meet all mechanical and electrical compatibility requirements. These components share identical package specifications, operating temperature ranges, and compliance certifications. Differences in slew rate, bandwidth, and supply current represent performance enhancements in the active substitute parts.

Parameter Comparison

Parameter	MAX4285ESA+	AD8038ARZ	AD8038ARZ-REEL	AD8038ARZ-REEL7
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Product Status	Obsolete	Active	Active	Active
Amplifier Type	Buffer, Voltage Feedback	Voltage Feedback	Voltage Feedback	Voltage Feedback
Number of Circuits	1	1	1	1
Slew Rate	385 V/µs	425 V/µs	425 V/µs	425 V/µs
-3dB Bandwidth	250 MHz	350 MHz	350 MHz	350 MHz
Current - Input Bias	13 µA	400 nA	400 nA	400 nA
Voltage - Input Offset	100 µV	500 µV	500 µV	500 µV
Current - Supply	23 mA	1 mA	1 mA	1 mA
Voltage - Supply Span (Min)	2.85 V	3 V	3 V	3 V
Voltage - Supply Span (Max)	6.5 V	12 V	12 V	12 V
Operating Temperature	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C
Package / Case	8-SOIC (0.154", 3.90 mm)	8-SOIC (0.154", 3.90 mm)	8-SOIC (0.154", 3.90 mm)	8-SOIC (0.154", 3.90 mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
ECCN	EAR99	EAR99	EAR99	EAR99
HTSUS	8542.33.0001	8542.33.0001	8542.33.0001	8542.33.0001

Engineering Selection Recommendations

Product Status Consideration: The MAX4285ESA+ is classified as obsolete. The AD8038ARZ, AD8038ARZ-REEL, and AD8038ARZ-REEL7 are all active products from Analog Devices Inc., ensuring long-term availability and continued manufacturing support.

Compliance & Certification: All substitute parts maintain ROHS3 compliance, MSL Level 1 (Unlimited), and identical export classification (EAR99) and tariff codes (HTSUS 8542.33.0001) as the original MAX4285ESA+. These certifications ensure regulatory compatibility across applications.

Packaging Variants: Three substitute options are available with identical electrical specifications but different packaging configurations:

AD8038ARZ: Tube packaging
AD8038ARZ-REEL: Reel packaging (standard)
AD8038ARZ-REEL7: Tape & Reel (TR) packaging

Selection between these variants depends on procurement volume and assembly line requirements. All three variants are electrically and mechanically interchangeable.

Performance Enhancement: The AD8038 series demonstrates improved electrical performance compared to the MAX4285ESA+, including higher slew rate (425 V/µs vs. 385 V/µs), greater bandwidth (350 MHz vs. 250 MHz), and significantly reduced supply current (1 mA vs. 23 mA). These enhancements provide design flexibility without requiring circuit modifications.

Frequently Asked Questions (FAQ)

Q: Can AD8038ARZ directly replace MAX4285ESA+ in existing designs?

A: Yes. The AD8038ARZ shares identical package specifications (8-SOIC, 0.154" width), operating temperature range (-40°C to 85°C), and compliance certifications (ROHS3, MSL 1). Pin-to-pin compatibility and functional equivalence are established. No circuit modifications are required.

Q: What is the difference between AD8038ARZ, AD8038ARZ-REEL, and AD8038ARZ-REEL7?

A: These three part numbers are electrically identical. The differences are packaging configurations: AD8038ARZ is supplied in tubes, AD8038ARZ-REEL in standard reel packaging, and AD8038ARZ-REEL7 in tape & reel format. Selection depends on assembly volume and procurement preferences.

Q: Are there supply voltage compatibility concerns?

A: The MAX4285ESA+ operates from 2.85 V to 6.5 V. The AD8038 series operates from 3 V to 12 V. Designs using supply voltages between 3 V and 6.5 V are fully compatible. Designs operating below 3 V require circuit evaluation.

Q: How do the electrical performance differences affect substitution?

A: The AD8038 series provides superior performance: higher slew rate (425 V/µs vs. 385 V/µs), greater bandwidth (350 MHz vs. 250 MHz), and lower supply current (1 mA vs. 23 mA). These improvements are backward compatible and do not introduce compatibility issues in existing applications.

Q: Is the AD8038 series suitable for high-volume production?

A: Yes. All three AD8038 variants are active products with substantial inventory availability (1,430 to 7,486 pieces in stock). The tape & reel variant (AD8038ARZ-REEL7) is optimized for automated assembly processes.

Q: What compliance certifications apply to substitute parts?

A: All substitute parts maintain ROHS3 compliance, MSL Level 1 (Unlimited), EAR99 export classification, and HTSUS code 8542.33.0001, matching the original MAX4285ESA+ certifications.

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