LM301AD Equivalent & Substitute Parts

Part Overview

The LM301AD is a general-purpose operational amplifier manufactured by STMicroelectronics in 8-SOIC surface mount packaging. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The LM301AD operates across a supply voltage range of 10V to 44V with a slew rate of 0.5V/µs and gain bandwidth product of 1 MHz, serving applications requiring general-purpose amplification in industrial and consumer electronics.

Substiute Parts

LM301AD

STMicroelectronicsIn Stock: 99650LM301AD Datasheet

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LM301ADR2G

onsemiIn Stock: 3651LM301ADR2G Datasheet

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TL061IDR

Texas InstrumentsIn Stock: 18581TL061IDR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM301AD is determined by compatibility across the following critical parameters:

Package Compatibility: All substitute parts must use 8-SOIC surface mount packaging with identical 0.154" (3.90mm) width to ensure PCB footprint compatibility.

Electrical Performance Envelope: Substitute parts must operate within the supply voltage range and maintain functional equivalence in gain bandwidth product and slew rate characteristics.

Input Bias Current and Offset Voltage: These parameters define signal fidelity and must remain within acceptable ranges for the application circuit.

Output Current Capability: Substitute parts must deliver minimum 30 mA output current per channel.

Compliance Requirements: All substitute parts must maintain ROHS3 compliance and MSL Level 1 rating.

Two substitute parts are identified for the LM301AD:

1. LM301ADR2G (onsemi) — Direct functional equivalent with identical electrical specifications and active product status
2. TL061IDR (Texas Instruments) — Alternative topology (J-FET input) with enhanced performance characteristics and active product status

Parameter Comparison

Engineering Selection Recommendations

LM301ADR2G (onsemi) is the direct functional equivalent for LM301AD replacement. This part maintains identical electrical specifications including slew rate, input bias current, and input offset voltage. The LM301ADR2G carries active product status, ensuring long-term availability and supply chain continuity. The maximum supply voltage specification is 36V compared to the original 44V; circuit designs operating above 36V require verification against actual supply requirements. Both parts share identical packaging, compliance certifications, and moisture sensitivity ratings, enabling direct substitution in existing PCB designs.

TL061IDR (Texas Instruments) represents an alternative topology using J-FET input architecture. This part offers superior performance characteristics including 7× higher slew rate (3.5V/µs), significantly lower input bias current (30 pA versus 70 nA), and reduced supply current (0.2 mA versus 1.8 mA). The TL061IDR operates across a lower minimum supply voltage (7V versus 10V) and extends the operating temperature range to −40°C to 85°C. The maximum supply voltage is 36V. This device is suitable for applications requiring lower input bias current, higher slew rate, or extended temperature operation. Circuit redesign and validation are required when substituting the TL061IDR for the LM301AD due to the different input stage topology.

Both substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and 8-SOIC surface mount packaging identical to the original LM301AD.

Frequently Asked Questions (FAQ)

Q: Can LM301ADR2G directly replace LM301AD without circuit modification?

A: Yes. The LM301ADR2G maintains identical electrical specifications and packaging. The maximum supply voltage specification is 36V; verify that circuit supply voltages do not exceed this limit. Both parts are ROHS3 compliant with MSL Level 1 rating.

Q: What is the primary difference between LM301ADR2G and TL061IDR?

A: LM301ADR2G is a direct functional equivalent with identical specifications. TL061IDR uses J-FET input architecture, delivering higher slew rate (3.5V/µs versus 0.5V/µs), lower input bias current (30 pA versus 70 nA), and reduced supply current (0.2 mA versus 1.8 mA). TL061IDR requires circuit evaluation due to topology differences.

Q: Are all substitute parts available in the same package?

A: Yes. LM301ADR2G and TL061IDR are both supplied in 8-SOIC surface mount packaging with 0.154" (3.90mm) width, matching the original LM301AD footprint.

Q: What is the maximum supply voltage for each part?

A: LM301AD operates to 44V maximum. LM301ADR2G and TL061IDR both operate to 36V maximum. Circuits requiring operation above 36V cannot use the substitute parts.

Q: Do the substitute parts meet the same compliance requirements?

A: Yes. LM301ADR2G and TL061IDR are both ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating, matching the original LM301AD specifications.

Q: Which substitute part is recommended for low-power applications?

A: TL061IDR consumes 0.2 mA supply current compared to 1.8 mA for LM301ADR2G, making it suitable for battery-powered or low-power designs. Circuit validation is required due to J-FET input topology differences.

Q: Can TL061IDR be used in circuits designed for LM301AD?

A: TL061IDR can replace LM301AD in many applications but requires circuit evaluation. The J-FET input stage, higher slew rate, and lower input bias current may affect circuit behavior. Applications sensitive to input bias current or requiring the specific slew rate of the original device require detailed analysis.