LT1491CS Equivalent & Substitute Parts

Part Overview

The LT1491CS is a general-purpose operational amplifier manufactured by Analog Devices Inc., featuring four independent amplifier circuits in a 14-SOIC surface mount package. This device is designed for rail-to-rail output applications with low input bias current and operates across a wide supply voltage range of 2V to 44V. The part maintains Active product status and is RoHS3 compliant, making it suitable for modern electronic applications requiring multi-channel amplification in compact form factors. Identifying equivalent and substitute parts is necessary when managing inventory constraints, ensuring supply chain continuity, or accommodating specific packaging requirements while maintaining identical electrical performance.

Substiute Parts

LT1491CS

Analog Devices Inc.In Stock: 4385LT1491CS Datasheet

Current PartRFQ

LT1491CS#PBF

Analog Devices Inc.In Stock: 2822LT1491CS#PBF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LT1491CS is determined by strict equivalence across all electrical and mechanical parameters. The primary substitution criterion is the matching of the following key parameters: amplifier type (General Purpose), circuit count (4), output configuration (Rail-to-Rail), slew rate (0.07 V/µs), gain bandwidth product (200 kHz), input bias current (4 nA), input offset voltage (400 µV), supply current specification (40 µA across four channels), output current per channel (25 mA), supply voltage range (2V to 44V minimum, 44V maximum), operating temperature range (0°C to 70°C), and package type (14-SOIC surface mount).

The LT1491CS#PBF is classified as a direct manufacturer equivalent and qualifies as a substitute part because it maintains identical electrical specifications and mechanical packaging. The distinction between these parts is limited to packaging format: the LT1491CS uses standard packaging, while the LT1491CS#PBF is supplied in tube packaging. Both parts share the same base product number (LT1491), manufacturer (Analog Devices Inc.), and compliance certifications (RoHS3, REACH Unaffected).

Parameter Comparison

Engineering Selection Recommendations

Both the LT1491CS and LT1491CS#PBF are Active products from Analog Devices Inc. and maintain full RoHS3 compliance and REACH Unaffected status. Selection between these parts should be based on packaging and supply chain requirements rather than electrical performance, as all specifications are identical.

The LT1491CS#PBF, supplied in tube packaging, is appropriate for applications requiring bulk component handling and automated assembly processes. The standard LT1491CS packaging format may be preferred for applications with specific inventory management or storage protocols.

Both parts are suitable for direct substitution in existing designs without circuit modification, provided that the 14-SOIC surface mount package and specified electrical parameters align with the application requirements. The wide supply voltage range (2V to 44V) and rail-to-rail output configuration support diverse application environments including battery-powered and industrial systems.

Frequently Asked Questions (FAQ)

Q: Can the LT1491CS#PBF be used as a direct replacement for the LT1491CS?

A: Yes. The LT1491CS#PBF is a direct electrical and mechanical equivalent. All electrical parameters, operating characteristics, and package dimensions are identical. The only difference is the packaging format (tube versus standard packaging).

Q: What determines whether a part qualifies as a substitute for the LT1491CS?

A: A substitute part must match all of the following parameters: amplifier type (General Purpose), circuit count (4), output type (Rail-to-Rail), slew rate (0.07 V/µs), gain bandwidth product (200 kHz), input bias current (4 nA), input offset voltage (400 µV), supply current (40 µA), output current per channel (25 mA), supply voltage range (2V to 44V), operating temperature (0°C to 70°C), package type (14-SOIC), and mounting type (Surface Mount).

Q: Are there any compliance or certification differences between the LT1491CS and LT1491CS#PBF?

A: No. Both parts carry identical RoHS3 compliance, REACH Unaffected status, and Moisture Sensitivity Level 1 (Unlimited) ratings. Compliance certifications are equivalent across both part numbers.

Q: What is the significance of the "#PBF" suffix in the LT1491CS#PBF part number?

A: The "#PBF" suffix indicates that the part is supplied in tube packaging format. This designation does not affect electrical performance or functional characteristics; it specifies only the physical packaging and handling method.

Q: Can the LT1491CS be used in applications requiring the LT1491CS#PBF?

A: Yes. Since all electrical and mechanical specifications are identical, the LT1491CS can be substituted for the LT1491CS#PBF. The choice between them depends on packaging requirements and supply chain logistics rather than technical compatibility.

Q: What is the operating temperature range for both parts?

A: Both the LT1491CS and LT1491CS#PBF operate across a temperature range of 0°C to 70°C, making them suitable for commercial and industrial applications within this thermal envelope.

Q: Are both parts suitable for surface mount assembly?

A: Yes. Both parts are classified as Surface Mount devices in the 14-SOIC package format with dimensions of 0.154 inches (3.90mm width), compatible with standard PCB assembly equipment and processes.