OP90GS Equivalent & Substitute Parts Reference

Part Overview

The OP90GS is a general-purpose operational amplifier manufactured by Analog Devices Inc./Maxim Integrated, housed in an 8-SOIC surface mount package. This device is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and production continuity. The OP90GS operates across a wide supply voltage range (1.6V to 36V) with ultra-low input bias current (4 nA) and minimal input offset voltage (125 µV), making it suitable for precision analog applications requiring low power consumption and high impedance inputs.

Substiute Parts

OP90GS

Analog Devices Inc./Maxim IntegratedIn Stock: 2354OP90GS Datasheet

Current PartRFQ

MC33071DR2G

onsemiIn Stock: 3822MC33071DR2G Datasheet

MFR RecommendedRFQ

OP90GSZ

Analog Devices Inc.In Stock: 7590OP90GSZ Datasheet

MFR RecommendedRFQ

OP90GSZ-REEL

Analog Devices Inc.In Stock: 2797OP90GSZ-REEL Datasheet

MFR RecommendedRFQ

OP90GSZ-REEL7

Analog Devices Inc.In Stock: 6293OP90GSZ-REEL7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OP90GS is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Package type: 8-SOIC surface mount form factor
• Amplifier classification: General-purpose operational amplifier with single circuit
• Supply voltage range compatibility: Minimum 1.6V to maximum 36V operation
• Input bias current: 4 nA specification
• Input offset voltage: 125 µV specification
• Slew rate: 0.012 V/µs specification
• Output current capability: 5 mA per channel minimum
• Supply current: 14 µA specification

Substitute Categories:

Category 1: Direct Packaging Equivalents (Same Electrical Characteristics) OP90GSZ and OP90GSZ-REEL are direct substitutes manufactured by Analog Devices Inc., maintaining identical electrical specifications while differing only in packaging format (Tube and Tape & Reel respectively). These parts are active products with RoHS3 compliance and extended operating temperature range (-40°C to 85°C).

Category 2: Cross-Manufacturer Substitute MC33071DR2G (onsemi) represents a cross-manufacturer alternative. This part operates in the same 8-SOIC package but exhibits different electrical characteristics including higher slew rate (13 V/µs), higher input bias current (100 nA), and higher supply current (1.9 mA). The MC33071DR2G is an active product with RoHS3 compliance and extended temperature range (-40°C to 85°C).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

OP90GSZ, OP90GSZ-REEL, and OP90GSZ-REEL7 are the primary substitutes for the obsolete OP90GS. These Analog Devices Inc. parts maintain identical electrical specifications and 8-SOIC packaging. Selection among these three variants depends on procurement and assembly requirements:

• OP90GSZ (Tube packaging): Suitable for lower-volume applications and manual assembly processes.
• OP90GSZ-REEL (Tape & Reel): Standard format for automated pick-and-place assembly.
• OP90GSZ-REEL7 (Cut Tape & Digi-Reel®): Alternative tape format for automated assembly with Digi-Reel® compatibility.

All three active variants offer RoHS3 compliance and extended operating temperature range (-40°C to 85°C), providing regulatory advantage over the obsolete OP90GS.

For Cross-Manufacturer Substitution:

MC33071DR2G (onsemi) is a functional alternative when Analog Devices Inc. parts are unavailable. This part shares the 8-SOIC package and general-purpose amplifier classification. However, the MC33071DR2G exhibits significantly different electrical characteristics: higher slew rate (13 V/µs vs. 0.012 V/µs), higher input bias current (100 nA vs. 4 nA), higher input offset voltage (1 mV vs. 125 µV), and higher supply current (1.9 mA vs. 14 µA). The MC33071DR2G is suitable only for applications where these parameter differences do not compromise circuit performance. The part is active and RoHS3 compliant.

Compliance Considerations:

The OP90GS is RoHS non-compliant. All substitute parts (OP90GSZ, OP90GSZ-REEL, OP90GSZ-REEL7, and MC33071DR2G) are RoHS3 compliant, supporting regulatory requirements for new designs and production transitions.

Frequently Asked Questions (FAQ)

Q1: Can OP90GSZ directly replace OP90GS without circuit modification?

A: Yes. OP90GSZ maintains identical electrical specifications (slew rate, input bias current, input offset voltage, supply current, output current, and supply voltage range) and uses the same 8-SOIC package. The only difference is packaging format (Tube vs. unspecified). No circuit modification is required.

Q2: What is the difference between OP90GSZ, OP90GSZ-REEL, and OP90GSZ-REEL7?

A: All three parts are electrically identical. The differences are packaging formats only: OP90GSZ uses Tube packaging, OP90GSZ-REEL uses standard Tape & Reel format, and OP90GSZ-REEL7 uses Cut Tape & Digi-Reel® format. Selection depends on assembly process requirements and procurement preferences.

Q3: Can MC33071DR2G replace OP90GS in all applications?

A: No. While MC33071DR2G shares the 8-SOIC package and general-purpose amplifier classification, it exhibits significantly different electrical characteristics. The MC33071DR2G has higher slew rate (13 V/µs vs. 0.012 V/µs), higher input bias current (100 nA vs. 4 nA), higher input offset voltage (1 mV vs. 125 µV), and higher supply current (1.9 mA vs. 14 µA). Substitution is valid only for applications where these differences do not affect circuit performance. Applications requiring ultra-low input bias current or minimal input offset voltage should use OP90GSZ variants instead.

Q4: Why is the OP90GS obsolete?

A: The OP90GS is classified as obsolete by the manufacturer. Active alternatives (OP90GSZ, OP90GSZ-REEL, OP90GSZ-REEL7) are available from Analog Devices Inc. with identical electrical specifications and improved regulatory compliance (RoHS3).

Q5: Are all substitute parts RoHS compliant?

A: Yes. OP90GSZ, OP90GSZ-REEL, OP90GSZ-REEL7, and MC33071DR2G are all RoHS3 compliant. The original OP90GS is RoHS non-compliant. Substitution with any of these parts improves regulatory compliance for new designs.

Q6: What is the operating temperature range difference?

A: The OP90GS operates from 0°C to 70°C. All substitute parts (OP90GSZ, OP90GSZ-REEL, OP90GSZ-REEL7, and MC33071DR2G) operate from -40°C to 85°C, providing extended temperature range capability.

Q7: Can I use MC33071DR2G in precision measurement circuits?

A: MC33071DR2G is not recommended for precision measurement circuits requiring ultra-low input bias current (4 nA) or minimal input offset voltage (125 µV). The MC33071DR2G has input bias current of 100 nA and input offset voltage of 1 mV, which may introduce unacceptable errors in precision applications. Use OP90GSZ variants for such applications.

Q8: What is the minimum supply voltage for each part?

A: OP90GS, OP90GSZ, OP90GSZ-REEL, and OP90GSZ-REEL7 all support minimum supply voltage of 1.6V. MC33071DR2G requires minimum supply voltage of 3V. For applications operating below 3V, use Analog Devices Inc. variants only.

Q9: Which substitute part has the highest output current capability?

A: MC33071DR2G provides 30 mA output current per channel, compared to 5 mA for OP90GS and all OP90GSZ variants. If higher output current is required, MC33071DR2G is suitable provided other electrical characteristics are acceptable for the application.

Q10: Are all parts available in the same 8-SOIC package?

A: Yes. All substitute parts (OP90GSZ, OP90GSZ-REEL, OP90GSZ-REEL7, and MC33071DR2G) use the 8-SOIC package with 0.154" width (3.90mm), ensuring mechanical compatibility with OP90GS PCB layouts.