LT1497CS8#PBF Equivalent & Substitute Parts

Part Overview

The LT1497CS8#PBF is a dual-channel current feedback amplifier manufactured by Analog Devices Inc. in an 8-SOIC surface mount package. This device is classified as a linear amplifier with active product status and is designed for applications requiring high-speed signal conditioning and amplification. The LT1497CS8#PBF operates across a 5V to 30V supply range with a slew rate of 900V/µs and -3dB bandwidth of 50 MHz.

Substitute parts become necessary when the primary device reaches end-of-life status, inventory constraints occur, or application requirements demand enhanced performance specifications such as higher bandwidth, lower input bias current, or extended operating temperature ranges.

Substiute Parts

LT1497CS8#PBF

Analog Devices Inc.In Stock: 993LT1497CS8#PBF Datasheet

Current PartRFQ

THS3112ID

Texas InstrumentsIn Stock: 1177THS3112ID Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the LT1497CS8#PBF is determined by the following critical parameters:

Functional Equivalence Requirements:

• Amplifier Type: Current Feedback architecture
• Number of Circuits: Dual-channel (2 circuits minimum)
• Package / Case: 8-SOIC form factor with 0.154" (3.90mm) width
• Mounting Type: Surface Mount

Performance Compatibility Parameters:

• Slew Rate: Equal to or greater than 900V/µs
• -3dB Bandwidth: Equal to or greater than 50 MHz
• Current - Output / Channel: Equal to or greater than 220 mA
• Voltage - Supply Span: Overlapping range with 5V to 30V envelope

Electrical Characteristics:

• Voltage - Input Offset: Equal to or less than 3 mV
• Current - Input Bias: Lower values acceptable for improved performance
• Current - Supply: Lower values acceptable for reduced power consumption

Compliance & Environmental:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: MSL 1 (Unlimited)

The THS3112ID from Texas Instruments meets all functional equivalence requirements and exceeds performance specifications in slew rate, bandwidth, and output current capacity.

Parameter Comparison

Engineering Selection Recommendations

LT1497CS8#PBF (Primary Selection): The LT1497CS8#PBF maintains Active product status with Analog Devices, ensuring long-term availability and manufacturing support. This device is suitable for applications operating within the 0°C to 70°C temperature range and requiring 5V minimum supply voltage. ROHS3 compliance and MSL 1 rating confirm environmental and moisture handling standards. Select this part for new designs requiring standard performance specifications and extended product lifecycle support.

THS3112ID (Substitute Selection): The THS3112ID from Texas Instruments carries Last Time Buy status, indicating limited future availability. This device is appropriate for applications requiring enhanced performance specifications: 72% higher slew rate (1550V/µs versus 900V/µs), 120% higher bandwidth (110 MHz versus 50 MHz), and 21% higher output current capacity (270 mA versus 220 mA). The THS3112ID also provides 97% lower input bias current (330 nA versus 7 µA) and extended operating temperature range (-40°C to 85°C). However, the minimum supply voltage requirement increases to 10V, which may restrict applications in 5V-only systems. ROHS3 compliance and MSL 1 rating match the primary device. Select this part for performance-critical applications where the 10V minimum supply voltage is acceptable and Last Time Buy status does not conflict with project timelines.

Frequently Asked Questions (FAQ)

Q: Can the THS3112ID directly replace the LT1497CS8#PBF in existing designs?

A: Direct replacement is possible only if the application supply voltage is 10V or higher. The LT1497CS8#PBF operates at 5V minimum, while the THS3112ID requires 10V minimum. If the existing design operates at 5V to 9.9V, the THS3112ID is not compatible. Both devices share identical 8-SOIC package dimensions and pinout compatibility for dual-channel current feedback amplifier applications.

Q: What are the performance advantages of the THS3112ID over the LT1497CS8#PBF?

A: The THS3112ID provides superior performance in three key areas: slew rate increases from 900V/µs to 1550V/µs (72% improvement), -3dB bandwidth increases from 50 MHz to 110 MHz (120% improvement), and input bias current decreases from 7 µA to 330 nA (97% reduction). Output current capacity increases from 220 mA to 270 mA. These enhancements suit applications requiring higher-speed signal processing and lower input current requirements.

Q: Are there compliance or environmental differences between these devices?

A: Both devices are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings. REACH status is unaffected for both parts. No compliance or environmental differences exist between the LT1497CS8#PBF and THS3112ID.

Q: What is the significance of the THS3112ID's Last Time Buy status?

A: Last Time Buy status indicates that Texas Instruments has announced end-of-life for the THS3112ID and will cease manufacturing after a specified date. Existing inventory may be available, but future procurement will not be possible. This status does not affect device functionality or reliability for current applications but requires consideration for long-term product support and spare parts planning.

Q: Can I use the THS3112ID in a design originally specified for the LT1497CS8#PBF if I modify the power supply to 10V?

A: Yes, if the application can accommodate a 10V minimum supply voltage modification. The THS3112ID provides superior performance specifications and maintains identical package form factor and pinout. Verify that all other circuit components and power distribution design support the 10V minimum requirement before implementing this substitution.

Q: What is the impact of the lower input bias current in the THS3112ID?

A: The THS3112ID input bias current of 330 nA (versus 7 µA in the LT1497CS8#PBF) reduces input impedance loading effects and minimizes bias current-induced offset errors. This improvement benefits applications with high-impedance signal sources or precision measurement circuits where input bias current contributes significantly to total system error.