INA331AIDGKTG4 Equivalent & Substitute Parts

Part Overview

The INA331AIDGKTG4 is a single-channel instrumentation amplifier manufactured by Texas Instruments, housed in an 8-VSSOP surface mount package. This device provides rail-to-rail output capability with a 2 MHz bandwidth and is designed for precision signal conditioning applications requiring low input bias current and minimal input offset voltage.

The INA331AIDGKTG4 is currently discontinued at DiGi Electronics. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications. Substitute parts must maintain identical electrical specifications and package compatibility to ensure direct replacement without circuit redesign.

Substiute Parts

INA331AIDGKTG4

Texas InstrumentsIn Stock: 677INA331AIDGKTG4 Datasheet

Current PartRFQ

INA331AIDGKT

Texas InstrumentsIn Stock: 8337INA331AIDGKT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the INA331AIDGKTG4 is determined by strict equivalence across all electrical and mechanical parameters. The primary substitute part, INA331AIDGKT, maintains identical specifications across all critical parameters that define functional compatibility:

Key Parameters Determining Substitution:

• Amplifier Type: Instrumentation (single-channel configuration)
• Output Type: Rail-to-Rail (identical output swing capability)
• Slew Rate: 5 V/µs (identical transient response)
• Bandwidth: 2 MHz (identical frequency response)
• Input Bias Current: 0.5 pA (identical input characteristics)
• Input Offset Voltage: 250 µV (identical precision)
• Supply Current: 415 µA (identical power consumption)
• Output Current: 48 mA per channel (identical drive capability)
• Supply Voltage Range: 2.5 V to 5.5 V (identical operating range)
• Temperature Range: -55°C to 125°C (identical thermal specification)
• Package: 8-VSSOP (identical physical form factor)
• Compliance: ROHS3, MSL 2 (identical environmental standards)

The substitute part differs only in product status (Active vs. Discontinued) and packaging format (Cut Tape & Digi-Reel vs. standard packaging), with no impact on electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The INA331AIDGKT is the direct equivalent substitute for the INA331AIDGKTG4. All electrical specifications, mechanical dimensions, and environmental compliance certifications are identical. The substitute part is currently in active production status with confirmed inventory availability (8230 pieces), whereas the original part number is discontinued.

Selection of INA331AIDGKT is appropriate for:

• Direct replacement in existing designs without circuit modification
• New production builds requiring the INA331 instrumentation amplifier platform
• Applications requiring ROHS3 compliance and MSL 2 moisture sensitivity rating
• Systems operating within the -55°C to 125°C temperature range
• Designs utilizing 2.5 V to 5.5 V single or dual supply configurations

The substitute part maintains full compatibility with all PCB layouts, assembly processes, and test procedures designed for the original part number. No design verification or component qualification is required due to complete electrical and mechanical equivalence.

Frequently Asked Questions (FAQ)

Q: Can INA331AIDGKT be used as a direct replacement for INA331AIDGKTG4 without PCB modification?

A: Yes. The INA331AIDGKT is electrically and mechanically identical to the INA331AIDGKTG4. Both parts use the 8-VSSOP package with identical pin configuration, electrical specifications, and operating characteristics. No PCB layout changes are required.

Q: What is the difference between INA331AIDGKTG4 and INA331AIDGKT?

A: The parts are functionally equivalent. The primary differences are product status (discontinued vs. active) and packaging format (standard vs. Cut Tape & Digi-Reel). All electrical and mechanical specifications are identical.

Q: Are there any compliance or certification differences between these part numbers?

A: No. Both parts carry identical ROHS3 compliance status and MSL 2 (1 Year) moisture sensitivity rating. REACH and ECCN classifications are identical.

Q: What is the 8-VSSOP package, and is it compatible with 8-TSSOP or 8-MSOP footprints?

A: The 8-VSSOP is the supplier device package designation for this instrumentation amplifier. The physical package is compatible with 8-TSSOP and 8-MSOP footprints, both measuring 0.118 inches (3.00 mm) in width. PCB designs using either footprint designation will accommodate this component.

Q: Is the INA331AIDGKT available in the same packaging quantities as the original part?

A: The INA331AIDGKT is available in Cut Tape (CT) and Digi-Reel packaging formats with confirmed inventory of 8230 pieces. Packaging format selection depends on assembly process requirements (tape-and-reel for automated pick-and-place, cut tape for manual or mixed assembly).

Q: What supply voltage range does the INA331AIDGKT support?

A: The substitute part operates across a 2.5 V to 5.5 V supply span, supporting single supply operation (2.5 V to 5.5 V) or dual supply configurations (±1.25 V to ±2.75 V). This range is identical to the original part.

Q: Are there any thermal or frequency response differences between the two part numbers?

A: No. Both parts maintain identical operating temperature range (-55°C to 125°C), slew rate (5 V/µs), and -3dB bandwidth (2 MHz). Thermal and frequency response characteristics are fully equivalent.