MAX4040EUA Equivalent & Substitute Parts

Part Overview

The MAX4040EUA is a general-purpose operational amplifier manufactured by Analog Devices Inc./Maxim Integrated, designed for rail-to-rail applications in 8-uMAX/uSOP surface mount packaging. This device operates across a 2.4 V to 5.5 V supply range with a slew rate of 0.04 V/µs and gain bandwidth product of 90 kHz, suitable for low-power analog signal conditioning applications.

The MAX4040EUA is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications currently utilizing this component.

Substiute Parts

MAX4040EUA

Analog Devices Inc./Maxim IntegratedIn Stock: 975MAX4040EUA Datasheet

Current PartRFQ

MAX4040EUA+

Analog Devices Inc./Maxim IntegratedIn Stock: 952MAX4040EUA+ Datasheet

DirectRFQ

ADA4528-1ARMZ

Analog Devices Inc.In Stock: 2181ADA4528-1ARMZ Datasheet

MFR RecommendedRFQ

ADA4528-1ARMZ-R7

Analog Devices Inc.In Stock: 3544ADA4528-1ARMZ-R7 Datasheet

MFR RecommendedRFQ

ADA4528-1ARMZ-RL

Analog Devices Inc.In Stock: 2394ADA4528-1ARMZ-RL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX4040EUA is determined by compatibility across the following critical parameters:

Mechanical Compatibility:

• Mounting type: Surface Mount
• Package footprint: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
• Pin count and arrangement: 8-pin configuration

Electrical Compatibility:

• Output type: Rail-to-Rail operation
• Supply voltage range: Minimum 2.4 V, Maximum 5.5 V
• Number of circuits: Single amplifier per package
• Operating temperature range: -40°C to 85°C minimum

Performance Characteristics:

• Input bias current: 2 nA or lower
• Input offset voltage: 250 µV or lower
• Supply current: 14 µA or lower
• Output current per channel: 2.5 mA or higher

Substitute parts must maintain compatibility across all three categories. Parts that exceed these specifications in performance (lower offset voltage, higher output current, wider temperature range) remain functionally compatible. Parts that fall below these specifications in critical parameters are not suitable substitutes.

Parameter Comparison

Engineering Selection Recommendations

MAX4040EUA+ (Direct Equivalent)

The MAX4040EUA+ is the direct successor to the MAX4040EUA, maintaining identical electrical and mechanical specifications while offering active product status. This part is ROHS3 compliant, addressing regulatory requirements that the original MAX4040EUA does not meet. The MAX4040EUA+ is the preferred choice for applications requiring exact performance matching with improved compliance posture. Current inventory of 870 pieces supports immediate deployment.

ADA4528-1ARMZ Series (Enhanced Performance Alternative)

The ADA4528-1ARMZ, ADA4528-1ARMZ-R7, and ADA4528-1ARMZ-RL are zero-drift amplifiers that exceed the electrical specifications of the MAX4040EUA across multiple parameters. These parts are mechanically compatible (8-MSOP package) and electrically compatible (rail-to-rail output, overlapping supply voltage range). All three variants are ROHS3 compliant and carry active product status.

The ADA4528 series provides superior performance characteristics: input offset voltage of 0.3 µV (versus 250 µV), input bias current of 90 pA (versus 2 nA), slew rate of 0.5 V/µs (versus 0.04 V/µs), and gain bandwidth product of 4 MHz (versus 90 kHz). These improvements enable higher-precision signal conditioning and faster transient response. The extended operating temperature range (-40°C to 125°C) provides additional thermal margin.

Trade-offs include increased supply current (1.5 mA versus 14 µA) and higher output current capability (40 mA versus 2.5 mA). Selection between ADA4528 variants depends on packaging requirements: ADA4528-1ARMZ (Tube), ADA4528-1ARMZ-R7 (Cut Tape & Digi-Reel), or ADA4528-1ARMZ-RL (standard packaging).

Compliance Considerations

The MAX4040EUA is RoHS non-compliant. Applications subject to RoHS3 regulations must transition to MAX4040EUA+ or ADA4528 series parts. All substitute options listed are ROHS3 compliant and REACH unaffected.

Frequently Asked Questions (FAQ)

Q: Can MAX4040EUA+ be used as a direct replacement for MAX4040EUA?

A: Yes. The MAX4040EUA+ maintains identical electrical performance (slew rate, gain bandwidth product, input offset voltage, input bias current, supply current, output current) and mechanical compatibility (8-MSOP package, surface mount). The primary difference is product status (active versus obsolete) and RoHS compliance (ROHS3 versus non-compliant). No circuit modifications are required.

Q: What are the key differences between MAX4040EUA and ADA4528-1ARMZ?

A: Both parts are mechanically compatible (8-MSOP package) and electrically compatible (rail-to-rail output, 2.4 V to 5.5 V supply range). The ADA4528-1ARMZ is a zero-drift amplifier with superior precision: input offset voltage of 0.3 µV (versus 250 µV) and input bias current of 90 pA (versus 2 nA). The ADA4528 also provides higher slew rate (0.5 V/µs versus 0.04 V/µs), higher gain bandwidth product (4 MHz versus 90 kHz), higher output current (40 mA versus 2.5 mA), and extended temperature range (-40°C to 125°C versus -40°C to 85°C). Supply current is higher (1.5 mA versus 14 µA).

Q: Are the three ADA4528 variants (ARMZ, ARMZ-R7, ARMZ-RL) electrically identical?

A: Yes. All three variants (ADA4528-1ARMZ, ADA4528-1ARMZ-R7, ADA4528-1ARMZ-RL) are electrically and functionally identical. Differences are limited to packaging format: Tube, Cut Tape & Digi-Reel, and standard packaging respectively. Selection depends on procurement and assembly requirements.

Q: Is the 8-MSOP package footprint identical across all substitute parts?

A: Yes. All parts listed (MAX4040EUA, MAX4040EUA+, ADA4528-1ARMZ, ADA4528-1ARMZ-R7, ADA4528-1ARMZ-RL) use the 8-TSSOP/8-MSOP package with 0.118" width and 3.00mm body width. PCB footprints are compatible without modification.

Q: Can ADA4528 parts be used in applications designed for MAX4040EUA?

A: Yes, with design review. The ADA4528 series exceeds all minimum electrical specifications of the MAX4040EUA and maintains mechanical compatibility. However, the increased supply current (1.5 mA versus 14 µA) and higher output current capability (40 mA versus 2.5 mA) may require power supply and thermal management evaluation. The superior performance characteristics (lower offset voltage, lower bias current, higher bandwidth) are beneficial for precision applications.

Q: What is the inventory status for each substitute part?

A: MAX4040EUA: 875 pieces (obsolete status). MAX4040EUA+: 870 pieces (active). ADA4528-1ARMZ: 2113 pieces (active). ADA4528-1ARMZ-R7: 3505 pieces (active). ADA4528-1ARMZ-RL: 2300 pieces (active).

Q: Are all substitute parts RoHS compliant?

A: The MAX4040EUA is RoHS non-compliant. All substitute parts (MAX4040EUA+, ADA4528-1ARMZ, ADA4528-1ARMZ-R7, ADA4528-1ARMZ-RL) are ROHS3 compliant. All parts are REACH unaffected.