LMP2231AMAE/NOPB Equivalent & Substitute Parts

Part Overview

The LMP2231AMAE/NOPB is a general-purpose operational amplifier manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This single-circuit, rail-to-rail output amplifier operates across a 1.6 V to 5.5 V supply range and is designed for low-power applications requiring precision analog signal conditioning. The device is ROHS3 compliant and carries an unlimited moisture sensitivity level (MSL 1), making it suitable for standard manufacturing environments.

Substitute parts become necessary when the primary part experiences supply constraints, extended lead times, or when design flexibility permits operation within alternative electrical specifications while maintaining package and functional compatibility.

Substiute Parts

LMP2231AMAE/NOPB

Texas InstrumentsIn Stock: 1259LMP2231AMAE/NOPB Datasheet

Current PartRFQ

MAX4289ESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 1197MAX4289ESA+ Datasheet

MFR RecommendedRFQ

RE46C311S8F

Microchip TechnologyIn Stock: 2876RE46C311S8F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LMP2231AMAE/NOPB is determined by the following mandatory criteria:

Package Compatibility: All substitute parts must use the 8-SOIC (0.154", 3.90mm Width) surface mount package to ensure direct PCB footprint compatibility without layout redesign.

Functional Classification: Substitute parts must be classified as general-purpose operational amplifiers with single-circuit configuration and rail-to-rail output capability.

Supply Voltage Range: The substitute part's minimum supply voltage must not exceed 1.6 V, and maximum supply voltage must be at least 5.5 V to maintain compatibility with the original design's power distribution.

Compliance Status: All substitute parts must maintain ROHS3 compliance and MSL 1 rating to ensure manufacturing process compatibility and shelf-life equivalence.

Operating Temperature: The substitute part's operating temperature range must encompass or exceed the original specification of -40°C to 125°C, or be verified as acceptable for the intended application environment.

The following parts satisfy these criteria:

• MAX4289ESA+ (Analog Devices Inc./Maxim Integrated)
• RE46C311S8F (Microchip Technology)

Parameter Comparison

Engineering Selection Recommendations

LMP2231AMAE/NOPB (Primary Part): Select this part when the full operating temperature range of -40°C to 125°C is required and when higher slew rate (0.058 V/µs) and gain bandwidth product (130 kHz) specifications are necessary for the application. This device offers the widest temperature operating range among the three options and the highest dynamic performance metrics.

MAX4289ESA+ (Substitute - Analog Devices Inc./Maxim Integrated): This substitute is suitable for applications where the operating temperature range can be limited to -40°C to 85°C. The MAX4289ESA+ provides lower input bias current (5 nA) compared to the LMP2231AMAE/NOPB, making it advantageous for high-impedance signal conditioning circuits. The minimum supply voltage of 1.0 V provides additional flexibility for ultra-low-power designs. Both devices maintain ROHS3 compliance and MSL 1 rating.

RE46C311S8F (Substitute - Microchip Technology): This substitute is applicable only when the operating temperature range can be restricted to -10°C to 60°C. The RE46C311S8F is distinguished by its ultra-low supply current (0.6 µA), making it optimal for battery-powered or energy-harvesting applications. The minimum supply voltage requirement of 1.8 V is higher than the original part. All compliance certifications (ROHS3, MSL 1) are maintained.

Selection Criteria Summary:

• Temperature Range Requirement: If -40°C to 125°C is mandatory, use LMP2231AMAE/NOPB only.
• Temperature Range Flexibility (-40°C to 85°C): MAX4289ESA+ is acceptable.
• Temperature Range Flexibility (-10°C to 60°C): RE46C311S8F is acceptable for ultra-low-power applications.
• Supply Voltage Minimum: Verify application minimum supply voltage does not fall below the substitute part's minimum specification.
• Dynamic Performance: LMP2231AMAE/NOPB provides superior slew rate and bandwidth; substitutes have reduced performance in these parameters.

Frequently Asked Questions (FAQ)

Q: Can MAX4289ESA+ be used as a direct replacement for LMP2231AMAE/NOPB in all applications?

A: MAX4289ESA+ is a direct package and functional replacement only for applications where the operating temperature range of -40°C to 85°C is acceptable. If the design requires operation at temperatures above 85°C or below -40°C, MAX4289ESA+ is not suitable. Additionally, the reduced slew rate (0.006 V/µs vs. 0.058 V/µs) and gain bandwidth product (17 kHz vs. 130 kHz) must be verified as acceptable for the specific signal conditioning requirements.

Q: What are the key differences between the three parts?

A: The primary differences are operating temperature range, slew rate, gain bandwidth product, and supply current. LMP2231AMAE/NOPB offers the widest temperature range (-40°C to 125°C) and highest dynamic performance. MAX4289ESA+ provides lower input bias current (5 nA) and operates to -40°C to 85°C. RE46C311S8F is optimized for ultra-low power consumption (0.6 µA) but operates only from -10°C to 60°C.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use the 8-SOIC (0.154", 3.90mm Width) surface mount package with identical pinout for general-purpose operational amplifier configurations. PCB footprints are directly interchangeable without layout modification.

Q: Do all parts meet the same compliance standards?

A: Yes. All three parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity level ratings. They are suitable for standard manufacturing processes and have equivalent shelf-life handling requirements.

Q: What is the impact of the different input offset voltages?

A: LMP2231AMAE/NOPB has 10 µV input offset voltage, MAX4289ESA+ has 200 µV, and RE46C311S8F has 3 mV. For precision analog applications requiring offset voltage trimming or calibration, the higher offset voltages of the substitutes may require additional circuit compensation or calibration procedures.

Q: Can RE46C311S8F be used in applications requiring -40°C operation?

A: No. RE46C311S8F operates only from -10°C to 60°C. Applications requiring -40°C operation must use either LMP2231AMAE/NOPB or MAX4289ESA+.

Q: What is the significance of the different supply current specifications?

A: Supply current directly impacts power consumption and heat dissipation. RE46C311S8F (0.6 µA) is optimal for battery-powered applications. LMP2231AMAE/NOPB (10 µA) and MAX4289ESA+ (18 µA) consume more power but offer better dynamic performance. Selection depends on whether power efficiency or signal bandwidth is the priority.