INA116UA Equivalent & Substitute Parts

Part Overview

The INA116UA is a general-purpose instrumentation amplifier manufactured by Texas Instruments, housed in a 16-SOIC surface mount package. This device features a single amplification circuit with a slew rate of 0.8V/µs and -3dB bandwidth of 800 kHz, designed for precision signal conditioning applications requiring low input bias current (0.003 pA) and low input offset voltage (500 µV).

The INA116UA carries a "Not For New Designs" product status, indicating Texas Instruments has discontinued active development and support for this component. Organizations currently using this part in production or maintenance applications require equivalent alternatives to ensure supply chain continuity and long-term component availability.

Substiute Parts

INA116UA

Texas InstrumentsIn Stock: 1375INA116UA Datasheet

Current PartRFQ

INA826AID

Texas InstrumentsIn Stock: 10470INA826AID Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the INA116UA is determined by compatibility across the following critical parameters:

Functional Compatibility: Both the main part and substitute must operate as single-circuit amplifiers suitable for signal conditioning applications within the specified supply voltage range (9V to 36V minimum overlap).

Electrical Performance: Substitute parts must maintain slew rate and bandwidth specifications within acceptable operational margins for the target application. Input bias current and input offset voltage characteristics determine precision-level compatibility.

Package and Mounting: Surface mount technology and pin-count compatibility are mandatory for direct board-level substitution without redesign.

Supply Voltage Range: The substitute must support the full 9V to 36V supply span of the INA116UA to ensure operation across all intended power configurations.

Compliance and Status: Active product status and current RoHS certification ensure long-term availability and regulatory compliance for new production runs.

The INA826AID qualifies as a manufacturer-recommended substitute based on these criteria, despite differences in package size and amplifier classification.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The INA116UA is classified as "Not For New Designs," indicating end-of-life status. The INA826AID maintains Active product status with Texas Instruments, ensuring continued manufacturing support, technical documentation updates, and supply chain availability for both current and future production requirements.

Compliance and Certification: Both components are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and distribution. The INA826AID carries improved moisture sensitivity classification (MSL 2 versus MSL 3), reducing handling and storage risk during manufacturing operations.

Supply Voltage Compatibility: The INA116UA operates within a 9V to 36V supply range. The INA826AID supports 2.7V to 36V, providing broader low-voltage capability while maintaining full compatibility across the original part's operating envelope.

Package Transition: The INA826AID uses an 8-SOIC package compared to the INA116UA's 16-SOIC package. This represents a physical redesign requirement at the board level. Pin-count reduction from 16 to 8 reflects functional consolidation in the substitute design.

Performance Enhancements: The INA826AID delivers improved electrical performance across multiple parameters: higher slew rate (1.0V/µs versus 0.8V/µs), increased bandwidth (1 MHz versus 800 kHz), lower input offset voltage (40 µV versus 500 µV), and reduced supply current (200 µA versus 1 mA). These improvements support higher-speed signal conditioning and lower-power applications.

Temperature Range Extension: The INA826AID extends the upper operating temperature limit to 125°C, compared to 85°C for the INA116UA, enabling deployment in elevated-temperature environments.

Frequently Asked Questions (FAQ)

Q: Can the INA826AID directly replace the INA116UA without board redesign?

A: No. The INA826AID uses an 8-SOIC package with 8 pins, while the INA116UA uses a 16-SOIC package with 16 pins. Direct socket substitution is not possible. Board-level redesign is required to accommodate the different package footprint and pin configuration.

Q: What are the key electrical differences between these parts?

A: The INA826AID provides superior performance in slew rate (1.0V/µs versus 0.8V/µs), bandwidth (1 MHz versus 800 kHz), input offset voltage (40 µV versus 500 µV), and supply current consumption (200 µA versus 1 mA). Input bias current differs significantly (35 nA versus 0.003 pA), reflecting different amplifier architectures.

Q: Is the INA826AID suitable for applications requiring the INA116UA's 9V minimum supply voltage?

A: The INA826AID supports operation down to 2.7V, which is below the INA116UA's 9V minimum. However, both parts operate across the full 9V to 36V range. Applications requiring operation below 9V would benefit from the INA826AID's extended lower voltage capability, but this is not a substitution requirement for existing INA116UA designs.

Q: Why is the INA116UA marked "Not For New Designs"?

A: This designation indicates Texas Instruments has concluded active development and support for this component. Existing inventory may remain available, but the manufacturer recommends using active alternatives like the INA826AID for new product development to ensure long-term supply chain stability and access to technical support.

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

A: The INA116UA carries MSL 3 (168 hours), requiring more stringent moisture control during storage and handling. The INA826AID carries MSL 2 (1 year), allowing extended shelf life and reduced handling complexity. Lower MSL ratings reduce manufacturing risk and storage costs.

Q: Are both parts RoHS compliant?

A: Yes. Both the INA116UA and INA826AID are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic component manufacturing and distribution.

Q: What amplifier type differences exist between these parts?

A: The INA116UA is classified as a general-purpose amplifier, while the INA826AID is classified as an instrumentation amplifier with rail-to-rail output capability. This reflects architectural differences in input stage design and output swing characteristics, though both are single-circuit devices suitable for signal conditioning applications.