INA126PA Equivalent & Substitute Parts

Part Overview

The INA126PA is a single-circuit instrumentation amplifier manufactured by Texas Instruments in 8-PDIP through-hole packaging. This component is classified as obsolete, indicating discontinued production and limited availability for new designs. The INA126PA remains in stock with 3710 units available as new original inventory. Due to its obsolete status, equivalent substitute parts are necessary for ongoing production support, design continuity, and long-term component sourcing strategies.

Substiute Parts

INA126PA

Texas InstrumentsIn Stock: 3805INA126PA Datasheet

Current PartRFQ

INA126UA/2K5

Texas InstrumentsIn Stock: 32733INA126UA/2K5 Datasheet

MFR RecommendedRFQ

AMP04EPZ

Analog Devices Inc.In Stock: 1515AMP04EPZ Datasheet

MFR RecommendedRFQ

AMP04FPZ

Analog Devices Inc.In Stock: 1334AMP04FPZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the INA126PA is determined by the following critical parameters:

Functional Equivalence Criteria:

• Amplifier Type: Instrumentation
• Number of Circuits: 1
• Operating Temperature Range: -40°C to 85°C
• Supply Voltage Range: Minimum 2.7V to Maximum 36V
• RoHS3 Compliance

Packaging Compatibility: The INA126PA uses 8-DIP through-hole packaging. Substitute parts are grouped into two categories:

1. Direct Package Replacement (8-DIP Through Hole): AMP04EPZ and AMP04FPZ maintain identical through-hole mounting and footprint compatibility, enabling direct board-level substitution without layout modification.

2. Functional Equivalent with Alternative Packaging (8-SOIC Surface Mount): INA126UA/2K5 provides electrical equivalence but requires different mounting technology and board layout considerations.

All substitute parts maintain ROHS3 compliance and operate within the specified temperature range.

Parameter Comparison

Engineering Selection Recommendations

For Direct Board-Level Replacement (No Layout Changes):

AMP04EPZ and AMP04FPZ are preferred substitutes when through-hole mounting compatibility is required. Both parts maintain the 8-DIP package footprint identical to the INA126PA. These Analog Devices components are active products with established long-term availability. Both parts are ROHS3 compliant with MSL Level 1 (unlimited moisture sensitivity), matching the original component's handling requirements.

For New Designs or Surface Mount Implementations:

INA126UA/2K5 is the Texas Instruments equivalent in active production status. This part provides electrical equivalence to the INA126PA while utilizing 8-SOIC surface-mount packaging. The INA126UA/2K5 is ROHS3 compliant but carries MSL Level 2 (1-year moisture sensitivity), requiring appropriate storage and handling protocols. This option is suitable for designs transitioning from through-hole to surface-mount technology.

Inventory and Availability Considerations:

INA126UA/2K5 maintains the highest inventory level at 32,700 units, ensuring sustained supply for production requirements. AMP04EPZ and AMP04FPZ each maintain inventory above 1,300 units. The original INA126PA remains available with 3,710 units in stock despite obsolete status.

Compliance and Regulatory Status:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the regulatory profile of the original component. ECCN classification remains EAR99 across all options, with identical HTSUS coding (8542.33.0001).

Frequently Asked Questions (FAQ)

Q: Can AMP04EPZ or AMP04FPZ be used as direct replacements for INA126PA without circuit modification?

A: AMP04EPZ and AMP04FPZ maintain identical 8-DIP through-hole packaging and footprint compatibility with the INA126PA. Both parts operate within the -40°C to 85°C temperature range and are ROHS3 compliant. However, parameter differences exist: AMP04 series devices provide higher bandwidth (700 kHz vs. 200 kHz), lower input offset voltage (30 µV vs. 150 µV), and higher output current capability (30 mA vs. 10 mA). These enhanced specifications are generally compatible with applications designed for the INA126PA, but circuit performance characteristics will differ.

Q: What are the key differences between INA126UA/2K5 and the through-hole AMP04 alternatives?

A: INA126UA/2K5 is manufactured by Texas Instruments and provides electrical equivalence to the INA126PA with identical slew rate (0.4 V/µs) and bandwidth (200 kHz). The primary difference is packaging: INA126UA/2K5 uses 8-SOIC surface-mount technology requiring different board layout and assembly processes. AMP04 series parts use 8-DIP through-hole packaging matching the original INA126PA footprint but offer enhanced performance specifications (higher bandwidth, lower offset voltage, higher output current).

Q: Are there supply voltage compatibility issues when substituting with AMP04 series parts?

A: AMP04EPZ and AMP04FPZ require a minimum supply voltage of 5V, compared to the INA126PA minimum of 2.7V. Applications operating at supply voltages below 5V cannot use AMP04 series substitutes. The maximum supply voltage for AMP04 parts is 30V, compared to 36V for the INA126PA. Designs utilizing the full 36V supply range must remain with INA126PA or INA126UA/2K5.

Q: What is the impact of higher supply current in AMP04 series devices?

A: AMP04 series parts consume 750 µA supply current compared to 175 µA for the INA126PA, representing a 4.3× increase in power consumption. Applications with strict power budget constraints or battery-powered designs should account for this increased current draw when evaluating AMP04 substitution.

Q: How does the moisture sensitivity level affect component handling and storage?

A: INA126PA and AMP04 series parts carry MSL Level 1 (unlimited moisture sensitivity), allowing indefinite storage without moisture control requirements. INA126UA/2K5 carries MSL Level 2 (1-year moisture sensitivity), requiring storage in controlled humidity environments and baking procedures before reflow soldering if the 1-year shelf life is exceeded. Through-hole components (INA126PA, AMP04EPZ, AMP04FPZ) are less sensitive to moisture than surface-mount alternatives.

Q: Can INA126UA/2K5 be used in existing through-hole PCB designs?

A: INA126UA/2K5 uses 8-SOIC surface-mount packaging and cannot be directly installed in through-hole PCB designs without adapter boards or complete layout redesign. This part is suitable only for new designs or PCB revisions incorporating surface-mount technology.

Q: What inventory considerations should guide substitute part selection?

A: INA126UA/2K5 maintains the highest inventory at 32,700 units, providing the strongest long-term supply assurance. AMP04EPZ and AMP04FPZ each maintain approximately 1,300+ units. The original INA126PA remains available with 3,710 units despite obsolete status. For production continuity, INA126UA/2K5 offers the most reliable supply position.