LOG104AIDE4 Equivalent & Substitute Parts Reference

Part Overview

The LOG104AIDE4 is a logarithmic and log ratio amplifier integrated circuit manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This device is classified as obsolete, indicating it has been discontinued and is no longer in active production. The LOG104AIDE4 performs logarithmic signal conditioning and ratio measurement functions in analog signal processing applications.

Due to its obsolete status, sourcing new units from primary distribution channels is limited. Identifying equivalent substitute parts ensures design continuity and supply chain reliability for applications currently utilizing this component. The substitute part LOG104AID maintains functional and electrical compatibility while offering improved availability through active production status.

Substiute Parts

LOG104AIDE4

Texas InstrumentsIn Stock: 1100LOG104AIDE4 Datasheet

Current PartRFQ

LOG104AID

Texas InstrumentsIn Stock: 1520LOG104AID Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LOG104AIDE4 with the LOG104AID is based on strict electrical and mechanical parameter equivalence. Both devices share identical core specifications that define functional compatibility:

Critical Equivalence Parameters:

• Amplifier Type: Both are logarithmic and log ratio amplifiers
• Number of Circuits: Both contain 1 circuit
• Slew Rate: Both rated at 0.5 V/µs
• -3dB Bandwidth: Both rated at 45 kHz
• Input Bias Current: Both rated at 5 pA
• Input Offset Voltage: Both rated at 300 µV
• Supply Current: Both rated at 1 mA
• Supply Voltage Range: Both operate from 9 V to 36 V
• Operating Temperature: Both rated -5°C to 75°C
• Package: Both use 8-SOIC (0.154", 3.90mm Width)
• Compliance: Both are ROHS3 compliant and REACH unaffected

The primary distinction between these parts is product status: LOG104AIDE4 is obsolete while LOG104AID is active production. The LOG104AID additionally specifies a maximum output current of 18 mA per channel, a parameter not listed for the LOG104AIDE4. This specification does not create incompatibility but rather provides additional design margin information for the active substitute.

Parameter Comparison

Engineering Selection Recommendations

The LOG104AID is the direct substitute for the LOG104AIDE4 based on complete electrical and mechanical parameter equivalence. Selection of LOG104AID over LOG104AIDE4 is justified by the following engineering factors:

Product Status: The LOG104AIDE4 is classified as obsolete, indicating discontinued production and limited future availability. The LOG104AID maintains active production status, ensuring reliable long-term supply chain access and consistent manufacturing quality control.

Compliance Certifications: Both parts maintain identical regulatory compliance: ROHS3 compliant and REACH unaffected. This equivalence ensures no additional compliance documentation or design review is required for substitution.

Functional Equivalence: All specified electrical parameters—slew rate, bandwidth, input bias current, input offset voltage, supply current, and supply voltage range—are identical between the two parts. The operating temperature range is identical, supporting equivalent thermal design requirements.

Mechanical Compatibility: Both parts use the 8-SOIC surface mount package with identical dimensions (0.154", 3.90mm Width). PCB footprints, reflow profiles, and assembly processes require no modification.

Moisture Sensitivity: Both parts carry MSL 3 rating with 168-hour floor life, requiring identical moisture control and handling procedures during assembly.

For new designs or redesigns of existing applications, LOG104AID is the appropriate selection. For existing inventory management of LOG104AIDE4 units, substitution with LOG104AID is electrically and mechanically transparent.

Frequently Asked Questions (FAQ)

Q: Can LOG104AID directly replace LOG104AIDE4 in existing circuit designs?

A: Yes. All electrical parameters, supply voltage requirements, operating temperature range, and package dimensions are identical. No circuit modifications, PCB layout changes, or firmware updates are required. The substitution is direct and transparent at the component level.

Q: What is the difference between LOG104AIDE4 and LOG104AID?

A: The primary difference is product status: LOG104AIDE4 is obsolete (discontinued production), while LOG104AID is in active production. LOG104AID is also specified with a maximum output current of 18 mA per channel. All other electrical and mechanical specifications are identical.

Q: Why is LOG104AIDE4 listed as obsolete?

A: Obsolete status indicates Texas Instruments has discontinued manufacturing this part number. LOG104AID represents the active production equivalent that maintains full functional compatibility.

Q: Are there any packaging differences between these parts?

A: LOG104AIDE4 packaging format is not specified in available documentation. LOG104AID is supplied in Tube packaging. Both use the 8-SOIC surface mount package format. Verify packaging requirements for your specific procurement and assembly processes.

Q: Do both parts require the same PCB footprint?

A: Yes. Both parts use the 8-SOIC package with identical dimensions (0.154", 3.90mm Width). PCB footprints are interchangeable without modification.

Q: Are there any thermal or power dissipation differences?

A: No. Both parts specify identical supply current (1 mA) and operate within the same temperature range (-5°C to 75°C). Thermal design considerations are equivalent.

Q: What is the moisture sensitivity requirement for these parts?

A: Both parts carry MSL 3 rating with 168-hour floor life. Identical moisture control procedures, storage conditions, and handling protocols apply to both parts.

Q: Can I use LOG104AID in applications currently using LOG104AIDE4?

A: Yes. Complete electrical and mechanical equivalence supports direct substitution in all applications. No design review, testing, or validation is required beyond standard component verification procedures.

Q: Is LOG104AID available in higher volume quantities?

A: LOG104AID is in active production status, which typically supports higher volume availability compared to obsolete parts. Verify current inventory and lead times with your component supplier.

Q: Do both parts meet the same regulatory compliance standards?

A: Yes. Both parts are ROHS3 compliant and REACH unaffected, meeting identical regulatory requirements for environmental and hazardous substance restrictions.