LOG102AID Equivalent & Substitute Parts

Part Overview

The LOG102AID 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 is no longer in active production. The LOG102AID performs logarithmic signal conditioning and ratio measurement functions in analog signal processing applications. Due to its obsolete status, identifying functionally equivalent substitute components is essential for design continuity, system maintenance, and procurement planning.

Substiute Parts

LOG102AID

Texas InstrumentsIn Stock: 1338LOG102AID Datasheet

Current PartRFQ

LOG112AID

Texas InstrumentsIn Stock: 1302LOG112AID Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LOG102AID is determined by strict equivalence across the following critical parameters:

Functional Equivalence Criteria:

• Amplifier Type: Logarithmic and Log Ratio
• Number of Circuits: 1
• Package / Case: 14-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount

Electrical Performance Criteria:

• Slew Rate: 0.5 V/µs
• Gain Bandwidth Product: 1.4 MHz
• -3dB Bandwidth: 45 kHz
• Current - Input Bias: 5 pA
• Voltage - Input Offset: 300 µV
• Current - Supply: 1.25 mA
• Current - Output / Channel: 18 mA
• Voltage - Supply Span: 9 V to 36 V

Compliance and Environmental Criteria:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 3 (168 Hours)

The LOG112AID meets all substitution criteria and is designated as the manufacturer-recommended equivalent.

Parameter Comparison

Engineering Selection Recommendations

The LOG112AID is the direct equivalent substitute for the LOG102AID based on the following engineering criteria:

Functional Compatibility: All electrical parameters, including slew rate, gain bandwidth product, input bias current, and supply voltage specifications, are identical between the two devices. Both components implement the same logarithmic and log ratio amplifier function in a single 14-SOIC package.

Package and Mounting Compatibility: Both devices use identical 14-SOIC surface mount packaging with 0.154" (3.90mm) width, ensuring mechanical and electrical compatibility with existing PCB layouts and assembly processes.

Compliance Status: The LOG112AID maintains ROHS3 compliance and identical moisture sensitivity level (MSL 3, 168 Hours) as the LOG102AID, satisfying regulatory and environmental requirements.

Product Status Advantage: The LOG112AID holds active product status, ensuring continued availability, technical support, and supply chain reliability. The LOG102AID is obsolete and subject to supply discontinuation.

Operating Temperature Consideration: The LOG112AID provides an extended operating temperature range (-5°C ~ 75°C) compared to the LOG102AID (0°C ~ 70°C), offering broader environmental compatibility for applications requiring lower or higher temperature operation within the specified ranges.

Frequently Asked Questions (FAQ)

Q: Can the LOG112AID be used as a direct replacement for the LOG102AID in existing designs?

A: Yes. The LOG112AID is electrically and mechanically identical to the LOG102AID across all specified parameters. No circuit modifications or PCB layout changes are required for substitution.

Q: What is the primary reason to substitute the LOG102AID?

A: The LOG102AID is classified as obsolete, meaning it is no longer manufactured. The LOG112AID is the active equivalent, ensuring long-term availability and supply chain continuity.

Q: Are there any differences in electrical performance between the LOG102AID and LOG112AID?

A: No. All electrical parameters—slew rate, gain bandwidth product, bandwidth, input bias current, input offset voltage, supply current, output current, and supply voltage range—are identical.

Q: Do both devices use the same package?

A: Yes. Both the LOG102AID and LOG112AID use the 14-SOIC (0.154", 3.90mm Width) surface mount package. Pin configuration and footprint are identical.

Q: What is the difference in operating temperature range?

A: The LOG102AID operates from 0°C to 70°C, while the LOG112AID operates from -5°C to 75°C. The LOG112AID provides a wider temperature range, making it suitable for applications requiring extended low or high temperature operation.

Q: Are both devices RoHS compliant?

A: Yes. Both the LOG102AID and LOG112AID are ROHS3 compliant and carry identical moisture sensitivity level (MSL 3, 168 Hours) ratings.

Q: Can I mix LOG102AID and LOG112AID components in the same production batch?

A: Yes. Since the devices are electrically and mechanically equivalent, they can be used interchangeably in the same design and production environment.

Q: What packaging options are available for the LOG112AID?

A: The LOG112AID is supplied in Tube packaging, whereas the LOG102AID packaging specification was not provided. Confirm packaging requirements with your procurement process.