LOG112AIDG4 Equivalent & Substitute Parts

Part Overview

The LOG112AIDG4 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, which necessitates identification of active equivalent alternatives for continued system support and new design implementations. The LOG112AIDG4 provides single-circuit logarithmic amplification functionality with specified electrical characteristics suitable for precision signal conditioning applications requiring logarithmic transfer functions.

Substiute Parts

LOG112AIDG4

Texas InstrumentsIn Stock: 932LOG112AIDG4 Datasheet

Current PartRFQ

LOG112AID

Texas InstrumentsIn Stock: 1302LOG112AID Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LOG112AIDG4 is determined by strict equivalence across the following critical parameters:

Functional Equivalence: Amplifier type (Logarithmic and Log Ratio), number of circuits (1), and core signal processing characteristics must remain identical.

Electrical Equivalence: Slew rate, gain bandwidth product, -3dB bandwidth, input bias current, input offset voltage, supply current, and supply voltage range must match or remain within the specified tolerances.

Mechanical Equivalence: Package type (14-SOIC), mounting method (Surface Mount), and physical dimensions must be identical to ensure PCB compatibility without redesign.

Environmental & Compliance Equivalence: Operating temperature range, RoHS status, and moisture sensitivity level must be maintained or exceed the original specification.

The LOG112AID represents a direct substitute meeting all these criteria while offering the advantage of active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

The LOG112AID is the direct manufacturer-recommended substitute for the obsolete LOG112AIDG4. Selection of the LOG112AID is justified on the following engineering grounds:

Product Status: The LOG112AIDG4 is classified as obsolete, creating supply chain risk and limiting long-term availability. The LOG112AID maintains active product status with Texas Instruments, ensuring continued manufacturing support and supply chain stability.

Electrical Compatibility: All electrical parameters are identical between the two devices, including slew rate, bandwidth characteristics, input bias current, input offset voltage, and supply specifications. No circuit redesign or recalibration is required.

Mechanical Compatibility: Both devices utilize the identical 14-SOIC package with matching physical dimensions and surface mount mounting type. Direct PCB substitution is possible without layout modification.

Compliance Certification: Both devices maintain ROHS3 compliance and identical moisture sensitivity ratings, ensuring regulatory and environmental compatibility in production and field deployment.

Packaging Advantage: The LOG112AID is supplied in Tube packaging, which may offer improved handling and storage characteristics compared to the original packaging specification.

Frequently Asked Questions (FAQ)

Q: Can the LOG112AID be used as a direct replacement for the LOG112AIDG4 without circuit modification?

A: Yes. The LOG112AID is electrically and mechanically identical to the LOG112AIDG4 across all specified parameters. Direct substitution on existing PCBs is possible without circuit redesign or component value changes.

Q: What is the primary reason for substituting the LOG112AIDG4?

A: The LOG112AIDG4 is classified as obsolete by Texas Instruments. The LOG112AID is the active equivalent, ensuring continued availability and manufacturing support for new designs and field replacements.

Q: Are the package dimensions identical between these two parts?

A: Yes. Both devices are housed in a 14-SOIC package with dimensions of 0.154" × 3.90mm width. PCB footprints and land patterns are identical.

Q: Do the electrical specifications differ between the LOG112AIDG4 and LOG112AID?

A: No. All electrical parameters including slew rate (0.5 V/µs), gain bandwidth product (1.4 MHz), -3dB bandwidth (45 kHz), input bias current (5 pA), input offset voltage (300 µV), and supply specifications are identical.

Q: What is the difference in packaging between these parts?

A: The LOG112AID is supplied in Tube packaging, while the LOG112AIDG4 packaging specification was not provided. Both devices are surface mount components in the same physical package.

Q: Are both parts RoHS compliant?

A: Yes. Both the LOG112AIDG4 and LOG112AID are ROHS3 compliant with identical moisture sensitivity levels (MSL 3, 168 Hours).

Q: Can the LOG112AID be used in new designs?

A: Yes. The LOG112AID is an active product with full manufacturing support from Texas Instruments and is suitable for new design implementations requiring logarithmic and log ratio amplification in the specified electrical and thermal operating range.