INA2128UG4 Equivalent & Substitute Parts

Part Overview

The INA2128UG4 is a dual-channel instrumentation amplifier manufactured by Texas Instruments in 16-SOIC surface mount packaging. This device is classified as obsolete product status. The INA2128UG4 provides two independent instrumentation amplifier circuits suitable for precision signal conditioning applications requiring low input bias current and low input offset voltage specifications.

Due to obsolete product status, equivalent substitute parts with active product status are available to ensure design continuity and supply chain reliability. Substitute parts maintain identical electrical performance and mechanical compatibility within the INA2128 base product family.

Substiute Parts

INA2128UG4

Texas InstrumentsIn Stock: 1002INA2128UG4 Datasheet

Current PartRFQ

INA2128UA

Texas InstrumentsIn Stock: 4656INA2128UA Datasheet

Parametric EquivalentRFQ

INA2128U

Texas InstrumentsIn Stock: 1585INA2128U Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution within the INA2128 instrumentation amplifier family is determined by strict equivalence of the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Amplifier Type: Instrumentation
• Number of Circuits: 2
• Package / Case: 16-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount
• Slew Rate: 4 V/µs
• Gain Bandwidth Product: 200 kHz
• -3dB Bandwidth: 1.3 MHz
• Current - Input Bias: 2 nA
• Current - Supply: 1.4 mA (x2 Channels)
• Current - Output / Channel: 15 mA
• Voltage - Supply Span: 4.5 V to 36 V
• Operating Temperature Range: -40°C to 85°C
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 3 (168 Hours)

All substitute parts listed maintain these critical parameters. Variations in Voltage - Input Offset and product status do not affect functional substitutability within the specified electrical operating envelope.

Parameter Comparison

Engineering Selection Recommendations

INA2128UA is classified as a parametric equivalent substitute. This part maintains all critical electrical specifications and mechanical compatibility with the INA2128UG4. The INA2128UA features improved input offset voltage specification (10 µV versus 25 µV), providing enhanced precision in applications requiring tighter offset tolerance. Product status is active, ensuring long-term supply availability. Packaging is tube format.

INA2128U is classified as a manufacturer-recommended substitute. This part maintains identical electrical specifications and mechanical compatibility with the INA2128UG4, including the 25 µV input offset voltage specification. Product status is active, ensuring supply chain continuity. Packaging is tube format.

Both substitute parts are ROHS3 compliant and carry identical moisture sensitivity level ratings. Selection between INA2128UA and INA2128U depends on input offset voltage requirements for the specific application. Both parts are suitable for direct replacement in existing designs using the obsolete INA2128UG4.

Frequently Asked Questions (FAQ)

Q: Can INA2128UA and INA2128U be used interchangeably with INA2128UG4?

A: Yes. Both substitute parts maintain identical critical electrical parameters (slew rate, gain bandwidth product, bandwidth, input bias current, supply current, output current, and supply voltage range) and identical mechanical specifications (16-SOIC package, surface mount). All three parts operate across the same temperature range (-40°C to 85°C) and carry identical RoHS3 compliance and moisture sensitivity ratings.

Q: What is the difference between INA2128UA and INA2128U?

A: The primary difference is input offset voltage specification. INA2128UA specifies 10 µV maximum input offset voltage, while INA2128U specifies 25 µV maximum input offset voltage. Both parts are otherwise electrically and mechanically identical. Selection depends on application precision requirements.

Q: Why is INA2128UG4 listed as obsolete?

A: Product status reflects manufacturer lifecycle classification. Active substitute parts (INA2128UA and INA2128U) are available to ensure design continuity and supply availability for applications currently using the INA2128UG4.

Q: Are there packaging differences between these parts?

A: INA2128UG4 packaging is not specified in available data. INA2128UA and INA2128U are supplied in tube packaging. All three parts use identical 16-SOIC (0.295", 7.50mm Width) case format suitable for surface mount assembly.

Q: Do these parts require different PCB layouts or assembly processes?

A: No. All three parts use identical 16-SOIC surface mount package dimensions and pinout. Existing PCB designs and assembly processes require no modification for substitution.

Q: Are compliance certifications identical across all three parts?

A: Yes. All three parts are ROHS3 compliant, carry identical moisture sensitivity level ratings (MSL 3, 168 Hours), and share the same REACH and ECCN classifications.