INA2126P Equivalent & Substitute Parts

Part Overview

The INA2126P is a dual-channel instrumentation amplifier manufactured by Texas Instruments, housed in a 16-pin DIP package for through-hole mounting applications. This device integrates two independent instrumentation amplifier circuits on a single integrated circuit, designed for precision signal conditioning and measurement applications requiring low input offset voltage and low input bias current.

The INA2126P is classified as an obsolete product. Locating equivalent or substitute components becomes necessary when through-hole mounted instrumentation amplifiers are no longer readily available from primary distribution channels or when design revisions require active product status for long-term supply chain assurance.

Substiute Parts

INA2126P

Texas InstrumentsIn Stock: 2339INA2126P Datasheet

Current PartRFQ

INA2126U

Texas InstrumentsIn Stock: 3849INA2126U Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the INA2126P is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Amplifier type must be instrumentation
• Number of circuits must equal 2
• Slew rate must be 0.4 V/µs or greater
• -3dB bandwidth must be 200 kHz or greater
• Input bias current must be 10 nA or lower
• Input offset voltage must be within acceptable tolerance
• Supply voltage range must encompass 2.7 V to 36 V
• Output current capability must be 10 mA per channel or greater
• Operating temperature range must include -40°C to 85°C

Mechanical Compatibility Criteria:

• Package must accommodate the application's mounting requirements
• Pin count and pinout must be functionally equivalent
• Physical dimensions must fit the circuit board layout

Compliance Criteria:

• RoHS3 compliance status
• Moisture sensitivity level
• REACH and ECCN classifications

The INA2126U is identified as a manufacturer-recommended substitute. Both devices share the same base product number (INA2126) and are manufactured by Texas Instruments, ensuring functional equivalence at the circuit level. The primary difference is the package type: the INA2126P uses through-hole DIP packaging, while the INA2126U uses surface-mount SOIC packaging.

Parameter Comparison

Engineering Selection Recommendations

For Through-Hole Applications: The INA2126P remains the appropriate choice when circuit board design requires through-hole mounting and the component is available from inventory. The device is ROHS3 compliant and carries MSL 1 rating, indicating unlimited shelf life under standard storage conditions.

For Surface-Mount Applications or Long-Term Supply Assurance: The INA2126U is the manufacturer-recommended substitute when transitioning to surface-mount technology or when active product status is required for supply chain continuity. The INA2126U maintains electrical equivalence across all critical parameters with the exception of input offset voltage (100 µV versus 50 µV), which remains within acceptable instrumentation amplifier tolerances for most applications. The INA2126U carries ROHS3 compliance and MSL 2 rating, requiring controlled storage conditions with a one-year shelf life limit.

Compliance Considerations: Both devices are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Selection between these parts should be based on mounting technology requirements and supply chain strategy rather than regulatory compliance, as both meet applicable standards.

Frequently Asked Questions (FAQ)

Q: Can the INA2126U directly replace the INA2126P in an existing through-hole circuit board design?

A: Direct replacement on a through-hole printed circuit board is not possible without board redesign. The INA2126P uses a 16-pin DIP package with 0.300-inch row spacing for through-hole insertion, while the INA2126U uses a 16-pin SOIC package with surface-mount pads. Physical board layout modifications and soldering process changes are required.

Q: Are the electrical specifications identical between INA2126P and INA2126U?

A: The electrical specifications are functionally equivalent with one exception. The input offset voltage is specified at 50 µV for the INA2126P and 100 µV for the INA2126U. Both values are within the performance envelope of dual instrumentation amplifiers and are compatible for applications where input offset voltage is not a critical design parameter.

Q: What is the significance of the different Moisture Sensitivity Levels?

A: The INA2126P carries MSL 1, indicating unlimited shelf life under standard storage conditions. The INA2126U carries MSL 2, requiring controlled storage with a maximum one-year shelf life from the date of manufacture. For applications with extended component storage periods, the INA2126P offers advantages in inventory management. For active production environments with regular component turnover, MSL 2 presents no practical limitation.

Q: Why is the INA2126P classified as obsolete?

A: Product obsolescence reflects Texas Instruments' decision to discontinue manufacturing and active support for this device. The INA2126U, with its active product status, represents the manufacturer's current instrumentation amplifier offering in this performance class and is the recommended path for new designs or long-term supply requirements.

Q: Can both devices operate across the full -40°C to 85°C temperature range?

A: Yes. Both the INA2126P and INA2126U are specified for operation across the -40°C to 85°C temperature range, making them suitable for industrial and extended-temperature applications.

Q: What is the functional difference between a 16-DIP and 16-SOIC package?

A: The 16-DIP (Dual In-line Package) is a through-hole component with leads inserted into drilled holes on a printed circuit board and soldered on the reverse side. The 16-SOIC (Small Outline Integrated Circuit) is a surface-mount component with leads soldered directly to pads on the board surface. SOIC packages occupy less board area and are compatible with automated assembly processes, while DIP packages are compatible with manual assembly and breadboard prototyping.