OP491GS-REEL Equivalent & Substitute Parts

Part Overview

The OP491GS-REEL is a general-purpose operational amplifier featuring four independent circuits in a 14-SOIC surface-mount package. This device delivers rail-to-rail output capability with a 3 MHz gain-bandwidth product and operates across a 2.7 V to 12 V supply range. The OP491GS-REEL is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and production continuity.

Substiute Parts

OP491GS-REEL

Analog Devices Inc.In Stock: 1019OP491GS-REEL Datasheet

Current PartRFQ

OP491GSZ-REEL

Analog Devices Inc.In Stock: 855OP491GSZ-REEL Datasheet

DirectRFQ

ADA4091-4ARUZ-RL

Analog Devices Inc.In Stock: 19167ADA4091-4ARUZ-RL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the OP491GS-REEL is determined by the following critical parameters:

Direct Substitution Criteria:

• Number of circuits: 4 independent amplifiers
• Output type: Rail-to-rail configuration
• Amplifier classification: General purpose
• Operating temperature range: -40°C to 125°C
• Mounting type: Surface mount
• Supply voltage compatibility within specified ranges

Substitution Categories:

Category 1: Direct Package Equivalent – OP491GSZ-REEL maintains identical electrical specifications and 14-SOIC packaging. This substitute differs only in product status (active versus obsolete) and packaging format (tape & reel).

Category 2: Functional Equivalent with Package Variation – ADA4091-4ARUZ-RL provides four-circuit general-purpose amplification with rail-to-rail output in an alternative 14-TSSOP package. This substitute accommodates different PCB layout requirements while maintaining core functional compatibility. Electrical parameters differ within acceptable ranges for general-purpose applications.

Parameter Comparison

Engineering Selection Recommendations

OP491GSZ-REEL is the primary substitute for OP491GS-REEL. This part maintains identical electrical specifications and package geometry while offering active product status and ROHS3 compliance. Selection of OP491GSZ-REEL requires no circuit redesign and supports direct PCB layout compatibility. The tape & reel packaging format accommodates automated assembly processes.

ADA4091-4ARUZ-RL serves as a functional alternative when package footprint variation is acceptable. This device provides extended supply voltage range (3 V to 30 V maximum) and improved input offset voltage (35 µV versus 80 µV). The 14-TSSOP package requires PCB layout modification but offers reduced board space requirements. The ADA4091-4ARUZ-RL exhibits lower gain-bandwidth product (1.27 MHz versus 3 MHz) and reduced slew rate (0.46 V/µs versus 0.5 V/µs), making it suitable for applications where bandwidth constraints do not limit performance. Both substitute parts carry ROHS3 compliance and REACH unaffected status, supporting regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can OP491GSZ-REEL directly replace OP491GS-REEL without circuit modification?

A: Yes. OP491GSZ-REEL maintains identical electrical specifications, supply voltage range, operating temperature range, and 14-SOIC package dimensions. Direct substitution requires no circuit redesign or PCB layout changes.

Q: What are the key differences between OP491GSZ-REEL and ADA4091-4ARUZ-RL?

A: OP491GSZ-REEL and ADA4091-4ARUZ-RL differ in package type (14-SOIC versus 14-TSSOP), gain-bandwidth product (3 MHz versus 1.27 MHz), slew rate (0.5 V/µs versus 0.46 V/µs), input offset voltage (80 µV versus 35 µV), and maximum supply voltage (12 V versus 30 V). OP491GSZ-REEL provides higher bandwidth performance, while ADA4091-4ARUZ-RL offers lower power consumption and extended supply range.

Q: Is PCB layout modification required when substituting with ADA4091-4ARUZ-RL?

A: Yes. ADA4091-4ARUZ-RL uses a 14-TSSOP package (0.173", 4.40mm width) compared to the 14-SOIC package (0.154", 3.90mm width) of OP491GS-REEL. PCB footprint redesign is necessary for this substitution.

Q: Are both substitute parts compliant with current regulatory standards?

A: Yes. Both OP491GSZ-REEL and ADA4091-4ARUZ-RL carry ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements.

Q: Which substitute is recommended for bandwidth-critical applications?

A: OP491GSZ-REEL maintains the original 3 MHz gain-bandwidth product and 0.5 V/µs slew rate. For applications requiring these performance levels, OP491GSZ-REEL is the appropriate selection.

Q: Can ADA4091-4ARUZ-RL operate at the same supply voltages as OP491GS-REEL?

A: ADA4091-4ARUZ-RL operates across a 3 V to 30 V supply range, which encompasses the OP491GS-REEL range of 2.7 V to 12 V. However, the minimum supply voltage differs by 0.3 V. Designs operating below 3 V require OP491GSZ-REEL.