MAX4241EUA+ Equivalent & Substitute Parts Reference

Part Overview

The MAX4241EUA+ is a general-purpose operational amplifier manufactured by Analog Devices Inc./Maxim Integrated, designed for rail-to-rail signal conditioning applications. This single-circuit amplifier operates across a supply voltage range of 1.8 V to 5.5 V and is housed in an 8-uMAX/uSOP surface mount package. The device is classified as Active product status with full ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this amplifier category. The substitution analysis focuses on amplifier type classification, output characteristics, supply voltage compatibility, and package form factor alignment.

Substiute Parts

MAX4241EUA+

Analog Devices Inc./Maxim IntegratedIn Stock: 1079MAX4241EUA+ Datasheet

Current PartRFQ

MAX4241EUA+

Analog Devices Inc./Maxim IntegratedIn Stock: 1079MAX4241EUA+ Datasheet

DirectRFQ

INA321EA/250

Texas InstrumentsIn Stock: 3461INA321EA/250 Datasheet

MFR RecommendedRFQ

INA321EA/2K5

Texas InstrumentsIn Stock: 1735INA321EA/2K5 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MAX4241EUA+ are identified based on the following criteria:

Primary Substitution Parameters:

• Rail-to-rail output capability
• Single-circuit configuration
• Surface mount package compatibility (8-TSSOP/8-MSOP form factor)
• Supply voltage range overlap (minimum 1.8 V to 5.5 V compatibility window)
• Active product status with current manufacturing support
• ROHS3 compliance and equivalent environmental certifications

Substitution Logic: The INA321EA/250 and INA321EA/2K5 are classified as instrumentation amplifiers rather than general-purpose amplifiers. While these devices share identical package specifications (8-VSSOP, equivalent to 8-TSSOP/8-MSOP), identical mounting type (surface mount), and overlapping supply voltage ranges (2.5 V to 5.5 V), they represent a different amplifier topology. Both substitute parts maintain rail-to-rail output capability and active product status with ROHS3 compliance. The substitution is valid where instrumentation amplifier characteristics (higher input impedance, lower input bias current, enhanced common-mode rejection) are acceptable or beneficial to the application circuit design.

Parameter Comparison

Engineering Selection Recommendations

MAX4241EUA+ Primary Selection: Select the MAX4241EUA+ when general-purpose amplifier topology is required with minimal supply current consumption (14 µA). This device is suitable for battery-powered applications and low-power signal conditioning circuits operating within the -40°C to 85°C temperature range. Active product status ensures continued manufacturing support and component availability.

INA321EA/250 and INA321EA/2K5 Substitution Criteria: The INA321 series devices are suitable substitutes when instrumentation amplifier characteristics provide circuit advantages, including superior input bias current performance (0.5 nA versus 2 nA) and lower input offset voltage (200 µV versus 250 µV). These devices support extended operating temperature range (-55°C to 125°C) and are available in equivalent surface mount packages. Both INA321 variants maintain ROHS3 compliance and active product status.

Supply Voltage Consideration: Applications requiring operation below 2.5 V must use the MAX4241EUA+, as the INA321 series minimum supply voltage is 2.5 V. Applications operating at 2.5 V or above can accommodate either device family.

Compliance Status: All three devices maintain ROHS3 compliance, REACH unaffected status, and EAR99 export classification. Moisture sensitivity differs: MAX4241EUA+ is MSL 1 (unlimited), while INA321 variants are MSL 2 (1 year).

Frequently Asked Questions (FAQ)

Q: Can INA321EA/250 and INA321EA/2K5 be used interchangeably with MAX4241EUA+ in all applications?

A: Substitution is valid when the circuit design accommodates instrumentation amplifier topology. The primary differences are amplifier type classification and performance characteristics. Applications requiring general-purpose amplifier behavior or operation below 2.5 V supply voltage must use MAX4241EUA+.

Q: What is the difference between INA321EA/250 and INA321EA/2K5?

A: Both devices share identical electrical specifications and package form factors. The designation suffix indicates internal gain configuration. Consult Texas Instruments datasheets for specific gain setting details.

Q: Are the package dimensions identical between MAX4241EUA+ and INA321 variants?

A: All three devices use 8-TSSOP/8-MSOP surface mount packages with 0.118" width (3.00mm). Physical footprints are compatible for PCB layout purposes. Verify pin assignment compatibility before substitution.

Q: What is the impact of higher slew rate in INA321 devices?

A: INA321 devices provide 0.4 V/µs slew rate compared to MAX4241EUA+ at 0.04 V/µs. Higher slew rate enables faster signal transitions and is beneficial for dynamic signal conditioning applications. This represents an improvement over the main part specification.

Q: Does moisture sensitivity level affect component selection?

A: MAX4241EUA+ carries MSL 1 (unlimited shelf life), while INA321 variants carry MSL 2 (1 year shelf life). For applications with extended storage requirements or high-humidity environments, MAX4241EUA+ provides superior moisture resistance characteristics.

Q: Can these devices operate at 1.8 V supply voltage?

A: MAX4241EUA+ supports 1.8 V minimum supply voltage. INA321 variants require minimum 2.5 V supply voltage. Applications constrained to 1.8 V operation must use MAX4241EUA+.