Equivalent & Substitute Parts Reference for LF398M

Part Overview

The LF398M by Texas Instruments is a sample and hold amplifier integrated circuit, provided in a 14-SOIC surface mount package. Its primary function is to accurately sample an analog voltage and hold it for processing or conversion, crucial in data acquisition and other linear amplifier applications. The part status is listed as obsolete, indicating that sourcing new production units may present significant challenges. Users seeking continued product support or inventory replenishment must identify equivalent substitute parts with identical functional, electrical, and packaging parameters.

Substiute Parts

LF398M

Texas InstrumentsIn Stock: 1995LF398M Datasheet

Current PartRFQ

LF398M/NOPB

Texas InstrumentsIn Stock: 1518LF398M/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts are selected exclusively on the basis of the following key parameters: amplifier type, number of circuits, input bias current, input offset voltage, supply current, voltage supply span (minimum and maximum), operating temperature range, mounting type, package/case dimensions, and compliance attributes (RoHS, REACH, MSL, ECCN, HTSUS). For successful substitution in the Linear, Amplifiers product category, all listed electrical and mechanical specifications must match directly. Only parts meeting these requirements should be used as direct replacements.

Parameter Comparison

Engineering Selection Recommendations

The LF398M is currently obsolete. For projects requiring continued manufacturing and regulatory compliance, the LF398M/NOPB presents a direct substitute, matching all key electrical and mechanical parameters. The LF398M/NOPB provides identical functional performance, package, and environmental ratings, with an added benefit of ROHS3 compliance. Selection should be determined by product lifecycle status and required environmental certifications.

Frequently Asked Questions (FAQ)

Q1: Are LF398M and LF398M/NOPB functionally identical for sample and hold amplifier applications?
A1: Yes, both parts have the same amplifier type, number of circuits, input bias current, input offset voltage, supply current, voltage supply span, operating temperature, mounting type, and package.

Q2: Does the LF398M/NOPB offer improved compliance over LF398M?
A2: LF398M/NOPB is ROHS3 compliant, whereas LF398M is RoHS non-compliant. Both are REACH unaffected.

Q3: Is there any difference in package or pinout between LF398M and LF398M/NOPB?
A3: No, both feature the same surface mount 14-SOIC (0.154", 3.90mm Width) package and supplier device package.

Q4: Can LF398M/NOPB be used in place of LF398M without qualification?
A4: Yes, based solely on provided electrical, mechanical, and compliance parameters, LF398M/NOPB serves as a direct substitute.

Q5: Are there temperature or supply voltage differences affecting compatibility?
A5: Both parts operate over 0°C ~ 70°C and 10 V to 36 V supply span, permitting identical system integration.