INA129UAE4 Equivalent & Substitute Parts

Part Overview

The INA129UAE4 is a precision, low-power instrumentation amplifier manufactured by Texas Instruments, designed for single-ended signal conditioning applications. This device features a single amplifier circuit in an 8-SOIC surface mount package with a supply voltage range of 4.5V to 36V and operates across the industrial temperature range of -40°C to 125°C.

The INA129UAE4 carries an obsolete product status. Locating equivalent or substitute components is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this amplifier topology.

Substiute Parts

INA129UAE4

Texas InstrumentsIn Stock: 1191INA129UAE4 Datasheet

Current PartRFQ

INA129UA

Texas InstrumentsIn Stock: 6311INA129UA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the INA129UAE4 is determined by strict alignment of the following critical parameters:

Functional Parameters:

• Amplifier Type: Instrumentation
• Number of Circuits: 1
• Output Type: Single-Ended

Electrical Parameters:

• Supply Voltage Range: 4.5V to 36V minimum and maximum
• Input Bias Current: 2 nA
• Supply Current: 700 µA
• Output Current per Channel: 15 mA
• Operating Temperature Range: -40°C to 125°C

Physical Parameters:

• Package Type: 8-SOIC surface mount
• Package Dimensions: 0.154" width (3.90mm)

Compliance Parameters:

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

The INA129UA qualifies as a direct substitute based on matching all critical functional, electrical, and physical parameters. Both devices share identical supply voltage specifications, input bias current, supply current draw, output current capability, operating temperature range, and package configuration.

Parameter Comparison

Engineering Selection Recommendations

The INA129UA is a direct functional and electrical equivalent to the INA129UAE4. Both devices are manufactured by Texas Instruments and share identical supply voltage specifications, input bias current characteristics, supply current consumption, output current capability, and operating temperature range. The physical package configuration is identical, enabling direct board-level substitution without layout modifications.

The INA129UA holds active product status, ensuring ongoing availability and manufacturing support. Both devices maintain ROHS3 compliance and identical moisture sensitivity specifications, satisfying regulatory and environmental requirements.

The INA129UA demonstrates superior performance characteristics in slew rate (4 V/µs versus 1.2 V/µs) and bandwidth (1.3 MHz versus 20 kHz). These enhanced specifications do not create incompatibility; rather, they provide additional performance margin for applications requiring higher-speed signal conditioning.

Selection of the INA129UA for replacement of obsolete INA129UAE4 units is supported by complete electrical and mechanical compatibility, active manufacturing status, and regulatory compliance alignment.

Frequently Asked Questions (FAQ)

Q: Can the INA129UA directly replace the INA129UAE4 in existing designs?

A: Yes. The INA129UA is electrically and mechanically equivalent to the INA129UAE4. Both devices share identical supply voltage ranges (4.5V to 36V), input bias current (2 nA), supply current (700 µA), output current (15 mA), operating temperature range (-40°C to 125°C), and 8-SOIC package configuration. No circuit modifications or board redesign is required.

Q: What is the primary difference between these two parts?

A: The INA129UAE4 is obsolete, while the INA129UA maintains active product status. The INA129UA provides enhanced performance with a slew rate of 4 V/µs (compared to 1.2 V/µs) and bandwidth of 1.3 MHz (compared to 20 kHz). These improvements do not affect compatibility with existing circuit designs.

Q: Are there any compliance or environmental differences?

A: No. Both the INA129UAE4 and INA129UA are ROHS3 compliant and carry identical Moisture Sensitivity Level 3 (168 Hours) specifications. Regulatory and environmental requirements are fully aligned.

Q: Is the package footprint identical?

A: Yes. Both devices use the 8-SOIC surface mount package with 0.154" width (3.90mm). PCB footprints are identical, and no layout modifications are necessary.

Q: Why does the INA129UA have higher slew rate and bandwidth specifications?

A: The INA129UA represents an active product line continuation with improved performance characteristics. These enhancements provide additional design margin and support higher-frequency signal conditioning applications. Existing designs operating within the original INA129UAE4 specifications remain fully compatible.

Q: What is the inventory status of the INA129UA?

A: The INA129UA is actively manufactured and maintained in stock. Active product status ensures reliable long-term availability for production and maintenance applications.