INA166UA Instrumentation Amplifier - Equivalent & Substitute Parts

Part Overview

The INA166UA is a single-channel instrumentation amplifier manufactured by Texas Instruments, housed in a 14-SOIC surface mount package. This device is classified as a Last Time Buy product, indicating discontinued production with limited inventory availability. The INA166UA operates across a wide supply voltage range of 9V to 36V and is designed for precision signal conditioning applications requiring low input offset voltage and controlled slew rate characteristics. Due to its Last Time Buy status, identifying equivalent substitute parts with identical electrical and mechanical specifications is essential for design continuity and long-term component sourcing.

Substiute Parts

INA166UA

Texas InstrumentsIn Stock: 2300INA166UA Datasheet

Current PartRFQ

INA166UA/2K5

Texas InstrumentsIn Stock: 3775INA166UA/2K5 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the INA166UA is determined by strict equivalence across all electrical performance parameters and mechanical compatibility criteria. The substitute part must maintain identical specifications in the following critical areas:

Electrical Performance Parameters:

• Slew Rate: 15 V/µs
• -3dB Bandwidth: 450 kHz
• Input Bias Current: 2.5 µA
• Input Offset Voltage: 50 µV
• Supply Current: 10 mA
• Output Current per Channel: 60 mA
• Supply Voltage Range: 9V to 36V
• Operating Temperature Range: -40°C to 85°C

Mechanical and Packaging Parameters:

• Package Type: 14-SOIC surface mount
• Package Dimensions: 0.154" width (3.90mm)
• Mounting Configuration: Surface Mount

Compliance and Certification:

• RoHS3 Compliance
• Moisture Sensitivity Level: 3 (168 Hours)

The INA166UA/2K5 is identified as the manufacturer-recommended substitute based on identical electrical specifications and mechanical compatibility. The primary distinction between these parts is the packaging format: the main part is supplied in Tube packaging, while the substitute is supplied in Tape & Reel (TR) format. Both parts share the same base product number (INA166) and are manufactured by Texas Instruments.

Parameter Comparison

Engineering Selection Recommendations

The INA166UA/2K5 is a direct electrical and mechanical equivalent to the INA166UA. Both parts are manufactured by Texas Instruments and share identical electrical performance specifications, operating parameters, and physical package dimensions. The substitute part maintains full compliance with ROHS3 standards and identical moisture sensitivity ratings.

The primary distinction between these parts is product status and packaging format. The INA166UA is designated as Last Time Buy, indicating end-of-life status with finite inventory. The INA166UA/2K5 maintains Active product status, ensuring continued availability and manufacturing support. The packaging difference—Tube format for the main part versus Tape & Reel format for the substitute—reflects standard distribution practices and does not affect electrical performance or circuit compatibility.

For applications requiring the INA166UA instrumentation amplifier, the INA166UA/2K5 provides equivalent functionality with the advantage of active product status and assured long-term availability. Both parts are suitable for identical circuit applications and PCB assembly processes.

Frequently Asked Questions (FAQ)

Q: Are the INA166UA and INA166UA/2K5 electrically identical?

A: Yes. Both parts share identical electrical specifications including slew rate (15 V/µs), bandwidth (450 kHz), input bias current (2.5 µA), input offset voltage (50 µV), supply current (10 mA), output current (60 mA), and supply voltage range (9V to 36V). Operating temperature range and all performance parameters are identical.

Q: What is the difference between Tube and Tape & Reel packaging?

A: Tube packaging supplies components in plastic tubes for manual handling and small-quantity applications. Tape & Reel (TR) packaging supplies components on continuous tape wound on reels for automated assembly processes. Both packaging formats contain identical components with no electrical or functional differences. The choice between formats depends on assembly methodology and production volume requirements.

Q: Can I use INA166UA/2K5 as a direct replacement for INA166UA in existing designs?

A: Yes. The INA166UA/2K5 is a direct replacement. Both parts use the 14-SOIC surface mount package with identical pinout, electrical characteristics, and operating specifications. No circuit modifications or design changes are required.

Q: Why is the INA166UA marked as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has discontinued production of this part number. Existing inventory is available for purchase, but no future manufacturing runs are planned. The INA166UA/2K5 maintains Active status, ensuring continued availability.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the INA166UA and INA166UA/2K5 are ROHS3 compliant and meet all environmental and regulatory requirements for lead-free manufacturing.

Q: What is the Moisture Sensitivity Level (MSL) rating?

A: Both parts carry an MSL rating of 3 (168 Hours), indicating that the components can be exposed to ambient conditions for up to 168 hours before soldering without requiring baking procedures.