INA129MDREP Equivalent & Substitute Parts

Part Overview

The INA129MDREP is an instrumentation amplifier manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This single-circuit device is designed for precision signal conditioning applications requiring low input offset voltage and low input bias current. The part is currently in active production status with 4182 units in stock. Equivalent and substitute parts are identified based on matching functional category, package type, electrical performance parameters, and supply voltage compatibility to enable direct or near-direct circuit board replacement.

Substiute Parts

INA129MDREP

Texas InstrumentsIn Stock: 4269INA129MDREP Datasheet

Current PartRFQ

LT1167ACS8-1#PBF

Analog Devices Inc.In Stock: 2510LT1167ACS8-1#PBF Datasheet

MFR RecommendedRFQ

LT1167AIS8-1#PBF

Analog Devices Inc.In Stock: 2532LT1167AIS8-1#PBF Datasheet

MFR RecommendedRFQ

LT1167CS8-1#PBF

Analog Devices Inc.In Stock: 3146LT1167CS8-1#PBF Datasheet

MFR RecommendedRFQ

LT1468CS8-2#PBF

Analog Devices Inc.In Stock: 2274LT1468CS8-2#PBF Datasheet

MFR RecommendedRFQ

LT1468IS8-2#PBF

Analog Devices Inc.In Stock: 1265LT1468IS8-2#PBF Datasheet

MFR RecommendedRFQ

LT1920CS8#PBF

Analog Devices Inc.In Stock: 27419LT1920CS8#PBF Datasheet

MFR RecommendedRFQ

LT1920CS8#TRPBF

Analog Devices Inc.In Stock: 2110LT1920CS8#TRPBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the INA129MDREP is determined by the following criteria:

Primary Substitution Category: Instrumentation Amplifiers Parts LT1167ACS8-1#PBF, LT1167AIS8-1#PBF, LT1167CS8-1#PBF, LT1920CS8#TRPBF, and LT1920CS8#PBF are instrumentation amplifiers with identical package type (8-SOIC), surface mount configuration, and overlapping supply voltage ranges (4.6 V to 36 V). These parts maintain the functional category and physical footprint compatibility required for direct substitution.

Secondary Substitution Category: General Purpose Amplifiers Parts LT1468IS8-2#PBF and LT1468CS8-2#PBF are general purpose operational amplifiers in the same 8-SOIC package. While functionally distinct from instrumentation amplifiers, they share identical package geometry and surface mount characteristics. These parts are listed as substitutes but operate under different electrical specifications and application constraints.

Key Substitution Parameters:

• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• Voltage - Supply Span (Min): 4.5 V or higher
• Voltage - Supply Span (Max): 36 V or compatible
• RoHS Status: ROHS3 Compliant

Parameter Comparison

Engineering Selection Recommendations

Instrumentation Amplifier Substitutes (Primary Category)

The LT1167 series (LT1167ACS8-1#PBF, LT1167AIS8-1#PBF, LT1167CS8-1#PBF) maintains instrumentation amplifier functionality with identical 8-SOIC packaging and compatible supply voltage range (4.6 V to 36 V). These parts are ROHS3 compliant with MSL rating of 1 (Unlimited), providing superior moisture handling compared to the INA129MDREP (MSL 3). Selection among LT1167 variants depends on operating temperature requirements: LT1167AIS8-1#PBF supports -40°C to 85°C; LT1167ACS8-1#PBF and LT1167CS8-1#PBF support 0°C to 70°C. The INA129MDREP offers extended temperature range (-55°C to 125°C) not matched by LT1167 substitutes.

The LT1920CS8#TRPBF and LT1920CS8#PBF are instrumentation amplifiers with identical package and supply voltage compatibility. LT1920CS8#TRPBF is packaged in Cut Tape (CT) & Digi-Reel format, matching the INA129MDREP packaging type. Both LT1920 variants are ROHS3 compliant with MSL 1 rating and operate within 0°C to 70°C temperature range.

General Purpose Amplifier Substitutes (Secondary Category)

The LT1468IS8-2#PBF and LT1468CS8-2#PBF are general purpose operational amplifiers, functionally distinct from instrumentation amplifiers. These parts share identical 8-SOIC package geometry but operate under different electrical specifications. Minimum supply voltage is 9 V (versus 4.5 V for INA129MDREP), and maximum supply voltage is 30 V (versus 36 V). These parts are ROHS3 compliant with MSL 1 rating. Selection between variants depends on operating temperature: LT1468IS8-2#PBF supports -40°C to 85°C; LT1468CS8-2#PBF supports 0°C to 70°C.

Compliance and Certification Status

All substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory status of the INA129MDREP. All parts carry ECCN classification EAR99 and HTSUS code 8542.33.0001.

Frequently Asked Questions (FAQ)

Q: Can LT1167 series parts directly replace the INA129MDREP on the circuit board?

A: LT1167 series parts (LT1167ACS8-1#PBF, LT1167AIS8-1#PBF, LT1167CS8-1#PBF) share identical 8-SOIC package geometry and surface mount footprint with the INA129MDREP, enabling direct physical replacement. However, electrical performance differs: LT1167 parts exhibit lower input bias current (50 pA versus 2 nA), lower input offset voltage (15 µV versus 100 µV), and lower slew rate (1.2 V/µs versus 4 V/µs). Circuit validation is required to confirm functional compatibility within specific application parameters.

Q: What is the difference between LT1920CS8#TRPBF and LT1920CS8#PBF?

A: Both parts are identical instrumentation amplifiers with matching electrical specifications. The primary difference is packaging format: LT1920CS8#TRPBF is supplied in Cut Tape (CT) & Digi-Reel format, matching the INA129MDREP packaging type; LT1920CS8#PBF is supplied in Tube packaging. Electrical performance and pin configuration are identical.

Q: Why is the operating temperature range of LT1167 and LT1920 substitutes narrower than the INA129MDREP?

A: The INA129MDREP operates across -55°C to 125°C, while LT1167 and LT1920 series parts operate within 0°C to 70°C (or -40°C to 85°C for industrial variants). This reflects different design specifications and characterization ranges established by each manufacturer. Applications requiring extended temperature operation must retain the INA129MDREP or select the LT1167AIS8-1#PBF variant, which extends to -40°C.

Q: Can LT1468 general purpose amplifiers substitute for the INA129MDREP instrumentation amplifier?

A: LT1468 parts share identical 8-SOIC package geometry but are functionally distinct general purpose operational amplifiers, not instrumentation amplifiers. Minimum supply voltage is 9 V (versus 4.5 V for INA129MDREP), and maximum supply voltage is 30 V (versus 36 V). These parts are listed as substitutes based on package compatibility only. Circuit redesign and validation are required to confirm functional suitability.

Q: What does MSL rating indicate, and why do substitutes have lower MSL values?

A: Moisture Sensitivity Level (MSL) indicates the maximum time a component can be exposed to ambient conditions (30°C, 85% relative humidity) before soldering. The INA129MDREP carries MSL 3 (168 hours); all substitute parts carry MSL 1 (Unlimited). Lower MSL values indicate superior moisture resistance and reduced risk of moisture-induced failures during storage and handling. Substitutes with MSL 1 provide enhanced reliability in humid environments.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The INA129MDREP and all listed substitute parts (LT1167 series, LT1468 series, LT1920 series) are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.