OP191GS Equivalent & Substitute Parts

Part Overview

The OP191GS is a general-purpose operational amplifier manufactured by Analog Devices Inc., designed for rail-to-rail applications in 8-SOIC surface mount packaging. This device is classified as obsolete, which necessitates identification of equivalent substitute components for ongoing design support and procurement continuity. The OP191GS delivers a 3 MHz gain bandwidth product with 0.5V/µs slew rate, suitable for general-purpose amplification circuits requiring low input bias current and moderate supply voltage flexibility.

Substiute Parts

OP191GS

Analog Devices Inc.In Stock: 1984OP191GS Datasheet

Current PartRFQ

OP191GSZ

Analog Devices Inc.In Stock: 2636OP191GSZ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OP191GS is determined by electrical and mechanical parameter equivalence across the following criteria:

Electrical Parameters (Must Match):

• Amplifier Type: General Purpose
• Number of Circuits: 1
• Output Type: Rail-to-Rail
• Slew Rate: 0.5 V/µs
• Gain Bandwidth Product: 3 MHz
• Current - Input Bias: 30 nA
• Voltage - Input Offset: 80 µV
• Current - Supply: 260 µA
• Current - Output / Channel: 16 mA
• Voltage - Supply Span: 2.7 V to 12 V
• Operating Temperature Range: -40°C to 125°C

Mechanical Parameters (Must Match):

• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount

The OP191GSZ qualifies as a direct substitute based on complete electrical and mechanical parameter equivalence. The primary distinction between these parts is product status and packaging format, with OP191GSZ classified as active and supplied in tube packaging, whereas OP191GS is obsolete.

Parameter Comparison

Engineering Selection Recommendations

The OP191GSZ is the direct substitute for the obsolete OP191GS. Both components share identical electrical specifications and mechanical packaging, ensuring pin-for-pin and functional compatibility in existing circuit designs.

Selection Basis:

The OP191GSZ is recommended for new designs and replacement procurement due to its active product status. This part maintains full electrical equivalence with the OP191GS across all specified parameters, including slew rate, gain bandwidth product, input bias current, and supply voltage range.

The OP191GSZ carries ROHS3 compliance and REACH unaffected status, providing regulatory alignment for applications subject to environmental and hazardous substance restrictions. These certifications are not specified for the OP191GS, reflecting its obsolete classification.

Both parts are manufactured by Analog Devices Inc. and utilize the 8-SOIC surface mount package with identical physical dimensions (0.154" width, 3.90mm). Moisture sensitivity level 1 (unlimited) applies to both variants, indicating no special handling requirements during storage or assembly.

Frequently Asked Questions (FAQ)

Q: Can OP191GSZ be used as a direct replacement for OP191GS in existing designs?

A: Yes. The OP191GSZ is a direct substitute with identical electrical and mechanical specifications. All electrical parameters, including slew rate, gain bandwidth product, input bias current, supply voltage range, and operating temperature, are equivalent. The 8-SOIC surface mount package dimensions are identical, enabling pin-for-pin replacement without circuit modification.

Q: What is the primary difference between OP191GS and OP191GSZ?

A: The OP191GS is classified as obsolete, while OP191GSZ is active. The OP191GSZ includes ROHS3 compliance and REACH unaffected certifications. Packaging format differs: OP191GS uses standard packaging, while OP191GSZ is supplied in tube format. All electrical and mechanical specifications remain identical.

Q: Are there any compatibility concerns when substituting OP191GSZ for OP191GS?

A: No compatibility concerns exist. The parts are electrically and mechanically equivalent. The 8-SOIC package footprint, pin configuration, and all electrical characteristics are identical. Designs using OP191GS can transition to OP191GSZ without PCB layout modifications or circuit redesign.

Q: Does the OP191GSZ meet environmental compliance requirements?

A: Yes. The OP191GSZ is ROHS3 compliant and REACH unaffected, meeting current environmental and hazardous substance regulations. These certifications support applications in regulated industries and regions with environmental compliance mandates.

Q: What is the moisture sensitivity level for both parts?

A: Both OP191GS and OP191GSZ carry Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity. These parts do not require special moisture control during storage, handling, or assembly processes.

Q: Can OP191GSZ be used in the full operating temperature range of -40°C to 125°C?

A: Yes. The OP191GSZ operates across the full temperature range of -40°C to 125°C, matching the OP191GS specification. This range supports industrial and extended-temperature applications.

Q: What is the supply voltage range for OP191GSZ?

A: The OP191GSZ operates with a supply voltage span from 2.7 V minimum to 12 V maximum, identical to the OP191GS. This range accommodates single-supply and dual-supply configurations in low-voltage and standard-voltage applications.