LF298M Sample and Hold Amplifier IC Equivalent & Substitute Parts

Part Overview

The LF298M is a Sample and Hold Amplifier integrated circuit manufactured by Texas Instruments, designed for precision analog signal acquisition and storage applications. This device features a single sample-and-hold circuit in a 14-SOIC surface mount package and operates across a wide supply voltage range of 10V to 36V.

The LF298M is classified as an obsolete product. Locating equivalent or substitute components becomes necessary when the original part reaches end-of-life status, inventory depletion occurs, or long-term supply continuity cannot be assured. Identifying functionally compatible alternatives ensures design continuity and production scheduling reliability.

Substiute Parts

LF298M

Texas InstrumentsIn Stock: 2200LF298M Datasheet

Current PartRFQ

LF298M/NOPB

Texas InstrumentsIn Stock: 2182LF298M/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LF298M is determined by strict equivalence across the following critical parameters:

Functional Equivalence Criteria:

• Amplifier Type: Sample and Hold
• Number of Circuits: 1 circuit per package
• Input Bias Current: 5 nA
• Input Offset Voltage: 1 mV
• Supply Current: 4.5 mA
• Supply Voltage Range: 10V minimum to 36V maximum
• Operating Temperature: -25°C to 85°C minimum

Physical and Environmental Criteria:

• Package Type: 14-SOIC surface mount
• Package Dimensions: 0.154" width (3.90mm)
• RoHS Compliance: ROHS3 Compliant
• Moisture Sensitivity: MSL 1 (Unlimited)

The LF298M/NOPB qualifies as a direct substitute because it maintains identical electrical specifications, package configuration, and environmental compliance ratings. The primary distinction is product status and packaging format (Tube vs. standard packaging).

Parameter Comparison

Engineering Selection Recommendations

LF298M/NOPB as Primary Substitute:

The LF298M/NOPB is the direct functional equivalent of the LF298M. All electrical parameters, thermal specifications, and environmental compliance ratings are identical. The LF298M/NOPB maintains Active product status with Texas Instruments, ensuring continued availability and technical support.

Compliance and Certification Alignment:

Both parts carry ROHS3 compliance certification and MSL 1 (Unlimited) moisture sensitivity rating, confirming compatibility with modern manufacturing processes and long-term storage requirements. REACH Unaffected status applies to both variants, indicating no regulatory restrictions on use or distribution.

Practical Considerations:

The LF298M/NOPB is supplied in Tube packaging format, whereas the original LF298M may have been supplied in alternative packaging. This distinction affects only handling, storage, and bulk ordering logistics and does not impact electrical or mechanical compatibility in circuit applications.

Frequently Asked Questions (FAQ)

Q: Can the LF298M/NOPB be used as a direct replacement for the LF298M in existing designs?

A: Yes. The LF298M/NOPB is electrically and mechanically identical to the LF298M. All electrical specifications, pin configuration, package dimensions, and operating parameters match exactly. No circuit modifications are required.

Q: What is the significance of the "/NOPB" suffix in the LF298M/NOPB part number?

A: The "/NOPB" suffix indicates "No Plumbum" (lead-free) packaging, confirming RoHS3 compliance. This designation does not affect electrical performance or functional compatibility.

Q: Are there any temperature or voltage operating differences between the LF298M and LF298M/NOPB?

A: No. Both parts operate identically across the -25°C to 85°C temperature range and support the full 10V to 36V supply voltage span. Input bias current, input offset voltage, and supply current specifications are identical.

Q: What is the difference between the standard LF298M and the Tube-packaged LF298M/NOPB?

A: The packaging format differs. The LF298M/NOPB is supplied in Tube packaging, which affects order quantities and handling procedures but not the component itself. The die, leads, and electrical characteristics remain unchanged.

Q: Is the LF298M/NOPB suitable for new design implementations?

A: Yes. The LF298M/NOPB carries Active product status with Texas Instruments, ensuring long-term availability and continued manufacturing support. It is appropriate for both replacement and new design applications.

Q: Do both parts require identical PCB footprints and solder reflow profiles?

A: Yes. Both the LF298M and LF298M/NOPB use the 14-SOIC package with identical pin spacing (0.154" width, 3.90mm). PCB footprints, solder paste stencil designs, and reflow temperature profiles are interchangeable.

Q: What is the moisture sensitivity level for both parts, and what does MSL 1 mean?

A: Both parts carry MSL 1 (Unlimited) rating, indicating unlimited shelf life under controlled storage conditions. No special moisture-barrier packaging or baking procedures are required prior to assembly.

Q: Are there any supply chain advantages to using the LF298M/NOPB over the obsolete LF298M?

A: Yes. The LF298M/NOPB maintains Active status, ensuring consistent availability through authorized distributors. The obsolete LF298M may face supply constraints as remaining inventory depletes.