INA105AM Equivalent & Substitute Parts

Part Overview

The INA105AM is a differential amplifier integrated circuit manufactured by Texas Instruments, housed in a TO-99-8 metal can package for through-hole mounting. This device functions as a precision differential amplifier with a single circuit configuration, designed for analog signal conditioning and measurement applications requiring low input offset voltage and stable gain characteristics.

The INA105AM is classified as Last Time Buy, indicating that Texas Instruments has discontinued this product line. Finding equivalent substitute parts is necessary to support ongoing production requirements, design updates, and long-term supply chain continuity. The INA105KU/2K5 represents the active product continuation within the same base product family, offering identical electrical performance in a modern surface-mount package.

Substiute Parts

INA105AM

Texas InstrumentsIn Stock: 2969INA105AM Datasheet

Current PartRFQ

INA105KU/2K5

Texas InstrumentsIn Stock: 2803INA105KU/2K5 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the INA105AM is determined by strict equivalence across the following electrical and mechanical criteria:

Electrical Equivalence Requirements:

• Amplifier Type: Differential (single circuit configuration)
• Slew Rate: 3 V/µs
• -3dB Bandwidth: 1 MHz
• Voltage - Input Offset: 50 µV
• Current - Supply: 1.5 mA
• Current - Output / Channel: 20 mA
• Voltage - Supply Span: 10 V to 36 V
• Operating Temperature Range: -40°C to 85°C

Mechanical & Compliance Equivalence:

• Base Product Number: INA105 (same die and electrical design)
• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected
• Manufacturer: Texas Instruments

The INA105KU/2K5 meets all electrical specifications identically to the INA105AM. The primary difference is the package format: the INA105AM uses through-hole TO-99-8 metal can mounting, while the INA105KU/2K5 uses surface-mount 8-SOIC packaging. Both devices share the same base product number (INA105) and are manufactured by Texas Instruments, confirming functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

For Continued Through-Hole Applications: The INA105AM remains available in limited inventory (2900 pieces) as a Last Time Buy product. Existing through-hole designs may continue to use this part number while stock is available. However, long-term supply is not guaranteed beyond current inventory levels.

For New Designs and Production Continuity: The INA105KU/2K5 is the recommended substitute for all new designs and ongoing production planning. This part is classified as Active status, ensuring long-term availability and supply chain stability. The INA105KU/2K5 delivers identical electrical performance and meets the same compliance certifications (ROHS3, REACH Unaffected).

Package Transition Considerations: Substitution requires a design change from through-hole TO-99-8 to surface-mount 8-SOIC packaging. This transition necessitates PCB layout modifications and assembly process updates. The footprint change is the only mechanical difference; all electrical parameters remain equivalent.

Compliance & Regulatory Status: Both parts maintain ROHS3 compliance and REACH Unaffected status, ensuring regulatory continuity across supply transitions. No additional compliance documentation is required for substitution.

Frequently Asked Questions (FAQ)

Q: Can the INA105KU/2K5 be used as a direct replacement for the INA105AM in existing designs?

A: The INA105KU/2K5 is electrically equivalent to the INA105AM across all specified parameters. However, it is not a direct pin-for-pin replacement due to package differences. The INA105AM uses through-hole TO-99-8 mounting, while the INA105KU/2K5 uses surface-mount 8-SOIC packaging. PCB redesign is required to accommodate the different footprint and mounting method.

Q: What are the key electrical parameters that confirm substitution compatibility?

A: The INA105KU/2K5 matches the INA105AM across all critical electrical specifications: 3 V/µs slew rate, 1 MHz bandwidth, 50 µV input offset voltage, 1.5 mA supply current, 20 mA output current per channel, and 10 V to 36 V supply voltage range. Operating temperature range is identical at -40°C to 85°C.

Q: Why is the INA105AM classified as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has discontinued this product line. The INA105KU/2K5 represents the active product continuation within the INA105 family, offering the same electrical performance in a modern surface-mount package format preferred for current manufacturing processes.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both the INA105AM and INA105KU/2K5 are ROHS3 compliant and REACH Unaffected. Regulatory status is identical, and no additional compliance documentation is required when transitioning between these parts.

Q: What is the moisture sensitivity level of the INA105KU/2K5?

A: The INA105KU/2K5 has a Moisture Sensitivity Level (MSL) of 3, with a maximum floor life of 168 hours. This specification applies to the surface-mount package and must be observed during storage and assembly processes.

Q: How does the package difference affect circuit performance?

A: The package format (through-hole versus surface-mount) does not affect electrical performance. Both packages house the same die and deliver identical electrical characteristics. The package difference is purely mechanical and affects PCB layout, assembly method, and board real estate requirements.