LOG102AIDG4 Equivalent & Substitute Parts

Part Overview

The LOG102AIDG4 is a logarithmic and log ratio amplifier integrated circuit manufactured by Texas Instruments, housed in a 14-SOIC surface mount package. This device is classified as obsolete, indicating it has been discontinued and is no longer in active production. The LOG102AIDG4 performs logarithmic signal conditioning and ratio measurement functions in analog signal processing applications. Due to its obsolete status, identifying equivalent substitute parts is essential for design continuity, system maintenance, and procurement of replacement components for existing installations.

Substiute Parts

LOG102AIDG4

Texas InstrumentsIn Stock: 928LOG102AIDG4 Datasheet

Current PartRFQ

LOG112AID

Texas InstrumentsIn Stock: 1302LOG112AID Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LOG102AIDG4 is determined by strict equivalence across the following critical parameters:

Functional Equivalence: Both the main part and substitute must be logarithmic and log ratio amplifiers with a single circuit configuration.

Electrical Performance: Slew rate, gain bandwidth product, -3dB bandwidth, input bias current, input offset voltage, supply current, and supply voltage range must be identical or within the specified tolerances of the original device.

Package Compatibility: The 14-SOIC surface mount package is mandatory for direct board-level substitution without layout modifications.

Environmental and Compliance Standards: RoHS3 compliance and MSL rating of 3 (168 Hours) ensure compatibility with modern manufacturing and storage requirements.

Product Status Consideration: While the LOG102AIDG4 is obsolete, the LOG112AID is an active product from the same manufacturer, providing long-term availability and supply chain stability.

The LOG112AID meets all electrical and mechanical substitution criteria for the LOG102AIDG4.

Parameter Comparison

Engineering Selection Recommendations

The LOG112AID is the direct substitute for the LOG102AIDG4 based on the following engineering criteria:

Electrical Equivalence: All core electrical parameters—slew rate, gain bandwidth product, -3dB bandwidth, input bias current, input offset voltage, supply current, and supply voltage range—are identical between the two devices. This ensures functional equivalence in signal processing applications.

Package and Mounting Compatibility: Both devices use the 14-SOIC surface mount package with identical physical dimensions (0.154", 3.90mm width). Direct board-level substitution is possible without PCB layout modifications.

Compliance and Environmental Standards: Both parts are ROHS3 compliant and carry an MSL rating of 3 (168 Hours), meeting modern manufacturing and storage requirements. REACH status is unaffected for both devices.

Product Status Advantage: The LOG112AID is an active product in Texas Instruments' current portfolio, providing superior long-term availability, supply chain stability, and technical support compared to the obsolete LOG102AIDG4.

Operating Temperature Consideration: The LOG112AID offers an extended operating temperature range (-5°C to 75°C) compared to the LOG102AIDG4 (0°C to 70°C), providing additional thermal margin for demanding applications.

The LOG112AID is suitable for direct replacement in all applications where the LOG102AIDG4 was originally specified.

Frequently Asked Questions (FAQ)

Q: Can the LOG112AID be used as a direct drop-in replacement for the LOG102AIDG4?

A: Yes. The LOG112AID is electrically and mechanically equivalent to the LOG102AIDG4. All critical electrical parameters are identical, and both devices use the same 14-SOIC surface mount package. No circuit modifications or PCB layout changes are required.

Q: What is the primary reason for substituting the LOG102AIDG4?

A: The LOG102AIDG4 is classified as obsolete and is no longer in active production. The LOG112AID is an active product from Texas Instruments, ensuring long-term availability and supply chain continuity.

Q: Are there any differences in electrical performance between these two parts?

A: No. The slew rate, gain bandwidth product, -3dB bandwidth, input bias current, input offset voltage, supply current, and supply voltage range are identical for both devices.

Q: Does the LOG112AID have any advantages over the LOG102AIDG4?

A: The LOG112AID offers an extended operating temperature range (-5°C to 75°C versus 0°C to 70°C), providing additional thermal margin. Both parts are ROHS3 compliant and carry identical MSL ratings.

Q: Are both parts available in the same packaging format?

A: Yes. Both the LOG102AIDG4 and LOG112AID are supplied in 14-SOIC surface mount packages with identical physical dimensions. The LOG112AID is supplied in tube packaging.

Q: What compliance certifications apply to the LOG112AID?

A: The LOG112AID is ROHS3 compliant, REACH unaffected, and carries an MSL rating of 3 (168 Hours). These certifications match those of the LOG102AIDG4.

Q: Can the LOG112AID be used in applications requiring the full 0°C to 70°C operating range of the LOG102AIDG4?

A: Yes. The LOG112AID's operating temperature range (-5°C to 75°C) encompasses the original specification range, ensuring compatibility with all temperature requirements of the LOG102AIDG4.