LT1398CS#TRPBF Equivalent & Substitute Parts

Part Overview

The LT1398CS#TRPBF is a Current Feedback Amplifier (CFA) manufactured by Analog Devices Inc., configured as a dual-circuit operational amplifier in a 16-SOIC surface mount package. This device is classified as Last Time Buy, indicating discontinued production with limited inventory availability. The part delivers high-speed amplification with 800V/µs slew rate and 300 MHz bandwidth, suitable for applications requiring fast signal processing and wide bandwidth performance. Due to its Last Time Buy status, identification of functionally equivalent substitutes is necessary for design continuity and long-term supply chain planning.

Substiute Parts

LT1398CS#TRPBF

Analog Devices Inc.In Stock: 1108LT1398CS#TRPBF Datasheet

Current PartRFQ

LT1396CS8#TRPBF

Analog Devices Inc.In Stock: 3859LT1396CS8#TRPBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LT1398CS#TRPBF is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Amplifier topology (Current Feedback architecture)
• Number of circuits (dual-channel configuration)
• Slew rate performance (800V/µs minimum)
• Bandwidth specifications (-3dB Bandwidth ≥ 300 MHz)
• Input bias current (10 µA maximum)
• Supply voltage range (4V to 12V operation)
• Output current capability (80 mA per channel minimum)
• Operating temperature range (0°C to 70°C)

Mechanical Compatibility Criteria:

• Surface mount packaging
• Pin count and footprint compatibility
• SOIC package family

The LT1396CS8#TRPBF qualifies as a direct substitute based on matching electrical performance specifications and compliance certifications. While the LT1396CS8#TRPBF utilizes an 8-SOIC package (versus the 16-SOIC of the main part), it maintains electrical equivalence through identical dual-circuit current feedback architecture, matching slew rate, superior bandwidth performance, and compatible supply parameters. The reduced pin count reflects a more compact package implementation of the same functional topology.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The LT1398CS#TRPBF carries Last Time Buy status, indicating end-of-life production. The LT1396CS8#TRPBF maintains Active product status with higher inventory availability (3800 units versus 1086 units), providing superior long-term supply chain security.

Compliance and Certification Alignment: Both parts maintain identical RoHS3 compliance and Moisture Sensitivity Level 1 (Unlimited) ratings, ensuring equivalent environmental and handling requirements. REACH and ECCN classifications are identical across both devices.

Electrical Performance: The LT1396CS8#TRPBF delivers superior -3dB bandwidth performance (400 MHz versus 300 MHz) and lower input offset voltage (1 mV versus 1.5 mV), while maintaining all other critical electrical parameters at specification parity. Slew rate, supply current, output current, and supply voltage ranges are identical.

Package Consideration: The LT1396CS8#TRPBF utilizes an 8-SOIC package versus the 16-SOIC package of the main part. PCB layout redesign is required to accommodate the different pin configuration and reduced package footprint. Both packages maintain identical 0.154" (3.90mm) width specifications.

Frequently Asked Questions (FAQ)

Q: Can the LT1396CS8#TRPBF directly replace the LT1398CS#TRPBF without circuit modification?

A: Electrical substitution is valid based on matching amplifier topology, slew rate, and supply parameters. However, the different package format (8-SOIC versus 16-SOIC) requires PCB layout redesign and pin reassignment. Direct socket replacement is not possible.

Q: What is the primary reason for seeking a substitute for the LT1398CS#TRPBF?

A: The LT1398CS#TRPBF is classified as Last Time Buy, indicating discontinued production. The LT1396CS8#TRPBF provides functional equivalence with Active product status and higher inventory availability for sustained supply chain continuity.

Q: Are there performance differences between the LT1398CS#TRPBF and LT1396CS8#TRPBF?

A: The LT1396CS8#TRPBF demonstrates improved -3dB bandwidth (400 MHz versus 300 MHz) and lower input offset voltage (1 mV versus 1.5 mV). All other electrical parameters, including slew rate (800V/µs), supply current, and output current, are identical.

Q: Do both parts meet the same environmental and compliance standards?

A: Yes. Both the LT1398CS#TRPBF and LT1396CS8#TRPBF are ROHS3 compliant, carry Moisture Sensitivity Level 1 (Unlimited), and share identical REACH and ECCN classifications.

Q: What design considerations are necessary when switching from the LT1398CS#TRPBF to the LT1396CS8#TRPBF?

A: The primary design consideration is package format transition from 16-SOIC to 8-SOIC. This requires PCB footprint modification, pin mapping verification, and layout redesign. Electrical circuit operation remains compatible across the specified supply voltage range (4V to 12V) and operating temperature range (0°C to 70°C).

Q: Is the LT1396CS8#TRPBF suitable for applications currently using the LT1398CS#TRPBF?

A: The LT1396CS8#TRPBF is electrically suitable for applications requiring current feedback amplification with 800V/µs slew rate and minimum 300 MHz bandwidth. Package redesign is mandatory. The superior bandwidth specification (400 MHz) of the substitute part provides additional performance margin for high-frequency signal processing applications.